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HP 8350A User's Manual

1. EE EE E Ed Before programming the 83504 for different sweep functions the user should be aware of the extent of remote control that can be used The Remote Enable REMOTE command sets the 8350 into remote control from the local manual mode In remote the 8350 will perform only as its functions are programmed However if the LOCAL button is pressed the 8350A will return from the remote state to local control To prevent this from occurring the Local Lockout LOCAL LOCKOUT command disables all front panel controls specifically the Local key The Go To Local LOCAL command will return the 83504 to front panel control thereby removing it from the remote and local lockout modes Note that the above remote and local commands are different from the general HP 1B bus local and remote commands LOCAL 7 and REMOTE 7 Finally in remote control it is peri odically desirable to reset the 8350 to a pre defined state this is achievable with the Instrument Preset function PROGRAM 1 PROGRAM Line 10 Line 20 Line 30 Line 40 Line 50 Line 60 Line 70 EXPLANATION Sets 8350A to remote The 85A displays Remote Temporarily stops program execution Sets 8350A to remote Sets local lockout mode The 85A displays Local Lockout Temporarily stops program execution Line 80 Sets 8350A to local Line 90 The 85A displays Local Line 100
2. Display Update On Off DISPLAY UPDATE OFF 20 MHz V FM Sensitivity 6 MHz V Figure 3 17 Only Functions 4 of 7 Model 8350A Model 8350A Operating Information REMOTE FUNCTION PROCEDURE 8350A Output Response Input NE 90 bytes EOI lt 8 bytes EOI n E NE Valid Functions FA CW CF DF M1 M2 M3 M4 MS VR SHVR SHMI SS ST SM PL PS SL SP OUTPUT LEARN STRING INPUT LEARN STRING OUTPUT MICRO LEARN STRING lt INPUT MICRO LEARN STRING OUTPUT MODE STRING Output Interrogated Parameter OUTPUT INTERROGATE Function d dddddE dd Prefix Ul Output Active Parameter OUTPUT ACTIVE d dddddEtdd CR LF Output Status Bytes Request REQUEST Mask MASK Reset RESET Sweep gt SWEEP OUTPUT STATUS TS Figure 3 17 HP IB Only Functions 5 of 7 49 Operating Information Model 8350A MODE STRING 1 of 2 Bit Usage des 00000000 SWEEP MODE Start Stop 0000000 1 CW 00000010 F AF 00000000 SWEEP TRIGGER 00000001 00000010 00000011 3 00000000 00000001 00000010 single SWEEP SOURCE Time Man Ext MODULATION BLANKING Amplitude Mkr On Off On 1 Off 0 Display Blanking On Off RF Blanking On Off Sq Wave Modulation On Off ACTIVE MARKER
3. LOCAL OPERATOR S CHECKS Cont d CAUTION BEFORE CONNECTING LINE POWER ensure that all devices connected to this instrument are connected to the protective earth ground BEFORE SWITCHING ON THIS INSTRUMENT ensure that the line power plug is connected to a three conductor line power outlet that has a protective earth ground Grounding one conductor of a two conductor outlet is not sufficient NOTE BEFORE SWITCHING ON THIS INSTRUMENT ensure that the power transformer primary is matched to the available line voltage the correct fuse is installed and the safety precautions are taken See Power Requirements Line Voltage Selection Power Cables and associated warnings and cautions in Section Il Procedure 1 Set LINE switch to ON position Observe that LEDs above START and STOP buttons are on with the frequency range of installed plug in displayed above them Oscilloscope trace should show detected RF signal output below zero volt reference with no discontinuities in swept trace across band Press CW button Observe LED above CW on and trace is reduced to dot at center of CRT with display at center of plug in frequency range 3 Press button Observe LED above CF and AF buttons on that displayed center frequency is at center of plug in frequency range and AF display is equal to frequency span 4 Press button Observe button LED on an blinking and a intensity dot at app
4. PLUG IN POWER LEVEL CNN Plug in X1 dBm Power Limits xi gt 0 02 dB 0 02 dBm X dB GHz to 5 dB 0 01 dB Power Slope Mode t xit this mode via M code Table 1 Input Programming Codes 4 of 4 PROGRAMCODE CODE NUMERIC VALUE MODE FUNCTION PREFIX NUMERIC SCALE o9 ee une uec ACTIVATE FORMAT SUFFIX Factor RANGE RESOLUTION PLUG IN CRYSTAL MARKERS www a Crystal Marker Frequency Amplitude Markers INTEN MKRON C Intensity Markers INTEN MKR OFF PLUG IN SPECIAL FUNCTIONS FM Input 20 MHz V Sensitivity 6 MHz V Peak MIRI These codes functions do not apply to 86200 Series Plug ins of a string of 8 bit binary bytes terminated using the bus EOI line true with the last byte The Interrogate Active functions send a Data message con sisting of a 14 character ASCII string representing the numeric value in exponential form terminated with a Carriage Return Line Feed CR LF Binary Syntax b b Numeric Syntax d dddddEtdd CR LF Where the character b indicates an 8 bit binary byte and indicates a decimal digit 0 through 9 Note that the binary output format could have bytes that may be misinterpreted as Carriage Returns and or Line Feeds so the user should defeat the ASCII CR LF as valid character string terminators and rely on the byte count Learn String Selected wit
5. 1 5 General Information 1 7 SPECIFICATIONS 1 8 Listed in Table 1 1 are the specifications for the Model 8350A Sweep Oscillator These speci fications are the performance standards or limits against which the instrument may be tested Only the specifications for the Model 8350 Sweep Oscillator mainframe are given in this manual Referto the Operating and Service Manual for the specific RF plug in used for complete specifi cations relating to the RF plug in Table 1 2 lists the sweep oscillator supplemental characteristics Supplemental characteristics are not specifica tions but are typical characteristics included as additional information for the user 1 9 SAFETY CONSIDERATIONS 1 10 General 1 11 This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation This product has been manufactured and tested in accordance with international safety standards 1 12 Safety Symbols 1 13 A complete listing of the safety symbols used in this manual is given on the page preceding Figure 1 1 Included are descriptions of symbols which refer the operator to the manual from the instrument Protective Earth Ground Frame or Chassis Terminals Warning and Caution symbols 1 14 INSTRUMENTS COVERED BY MANUAL 1 15 Attached to the rear panel of the instru ment is a serial number plate A typical serial number plate is shown in Figure 1 2 The serial
6. Accuracy Refer to RF plug in unit specifications Marker Output Negative rectangular pulse avail able from the POS Z BLANK connector on the rear panel Refer to Table 1 2 Model 8350 General Information Table 1 1 Model 8350A Specifications 2 of 2 Marker Sweep RF output is swept between Marker 1 and Marker2 frequency values The Marker and Marker 2 frequency values can be entered as permanent sweep values with the SHIFT key Pressing MKR SWEEP again returns the instru ment to the last START STOP values Marker Marker to Center Frequency function causes the CW or Center Frequency CF of the sweep output to equal the frequency of the active marker SWEEP AND TRIGGER MODES Internal Sweep recurs automatically Line Sweep triggered by ac power line frequency External Trigger Sweep is actuated by an external trigger signal applied to pin 9 of the rear panel Programming Connector on the rear panel Trigger signal must be gt 2 Vdc wider than 0 5 us and not greater than 1 MHz in frequency Single Selects mode and triggers aborts a single sweep Sweep Time Continuously adjustable from 10 ms to 100 seconds Minimum sweep time may be more than 10 ms depending upon the specific RF plug in used and the bandwidth swept Manual Sweep Front panel controls knobs key board and step keys provide continuous manual adjustment of frequency between end frequencies set in any of the sweep functions Resolu
7. For Use in Country 8120 1351 United Kingdom Cyprus Nigeria Rhodesia Singapore 8120 1703 250V 8120 1369 8120 0696 250V 8120 1689 8120 1692 Austrailia Straight NZSS198 ASC112 90 New Zealand East and West Europe Saudi Arabia Egypt So Africa India unpolarized in many nations Mint Gray Straight CEE7 Y11 90 Mint Gray 125V 8120 1348 Straight NEMAS 1 5P 80 Black United States 8120 1398 90 80 Black Canada 8120 1754 Straight NEMAS 1 5P 36 Black Japan 100V or 8120 1378 Straight NEMAS 15P 80 Jade Grav 200 8120 1521 90 80 Jade Gray Mexico 8120 1676 Straight NEMAS 15P 36 Jade Gray Philippines Taiwan 8120 2104 Straight SEV1011 79 Gray Switzerland 1959 24507 Type 12 e LO O QN E 250V 8120 0698 Straight NEMA6 15P United States Canada 220V 8120 1957 Straight DHCK 107 8120 2956 90 79 Gray Denmark 79 Gray Part number shown for plug is industry identifier for plug only Number shown for cable is HP Part Number for complete cable including plug Earth Ground L Line Neutral 8120 1860 Straight CEE22 VI Systems Cabinet use 2 3 Installation 2 13 HP IB Address Selection The HP 1B address switch is set with the top cover removed from the 8350A and should be set only by a skilled person who is aware of the hazard in volved
8. 4 DISPLAY UPDATE ON OFF This selects whether not the 8350A updates numeric displays upon further programming of any parameter with a numeric value The function reduces the amount of time involved in programming the 8350A numerically related parameters ie CW Frequency and aids in producing faster stepped CW frequency sweeps The default at power on and Instrument Preset is the Display Update On state When in the Display Update Off state the 8350A numeric displays will be blanked FM SENSITIVITY 83500 Series Plug ins Only This selects the External FM Input sensitivity of 20 MHz per volt or 6 MHz per volt This function is normally selected with an internal plug in switch but can be overriden via the HP IB Note that the FM sensitivity is reset to the switch position after an Instrument Preset is executed Thus the user should select the desired sensitivity after every Instrument Preset LIMITATIONS CONCERNS L When using the Micro Learn String both Input and Output the 8350A must be in the CW mode and the plug in CW Filter capacitor should be off 2 You must exit the Input Micro Learn String mode with the MO code only The numeric displays will still be blanked until the appropriate functions are re activated Figure 3 17 Only Functions 3 of 7 Operating Information 47 Operating Information 48 3 Learn String and Micro Learn String characters must be retained and re input to th
9. rnt Line 4 Program the CW frequency using the default data format then go to line 2 Line 5 Format statement 1 is set up for program ming the CW frequency with a 1 MHz resolution Line 6 Program the CW frequency via format statement 1 then go back to line 2 The equipment setup is the same as the previous example Reset the 9825 erase the 9825 memory then type in the above program Then perform the following 1 Press on the 9825 The 9825 displays CW 7 555 GHz The 8350A changes from the instrument preset state of Start Stop sweep to a CW frequency of 7 555GHz 2 Press CONTINUE on the 9825 The 2825 now displays CW GHz Type in a new CW frequency value in GHz then press 3 The 8350 will be programmed to the new CW frequency with the new value printed on the internal strip printer The program jumps back to step 2 above When inputting the CW frequency try several values each with a different number of digits after the decimal point Notice that the 8350 displays the frequency to 3 decimal places 1 MHz frequency resolution Values with better than 1 MHz fre quency resolution are rounded to the nearest MHz by the 8350A However when the 9825 is reset all numeric output data defaults to the fxd 2 orfixed 2 decimal places format Thus the 9825 rounds the desired frequency to the nearest 10 MHz To change this free field format to more decimal places change the fixed forma
10. EXAMPLE PROGRAM 2 Programming Functions tantae patti totae M To program any function on the 8350A the controller must pass specific program codes and data to the sweeper The statement that allows this is the Output OUTPUT statement The alphanumeric data string of the output statement can be a M Line 120 Stops program execution To verify and investigate the different remote modes do the following 1 Press CONTROL STOP SCRATCH EXECUTE on the 9845B This scratches the program memory Press INSTR PRESET on the 8350A Type in the above program Press RUN on the 9845B With the 9845 displaying Remote verify that the 8350A REM light is lit From the front panel attempt to change the start frequency and verify that this is impossible Verify thatthe Instrument Preset key and all other keys except LCL are disabled Now press the LCL key and verify that the 8350A REM light is off and that you can modify any of the sweep functions mm UC n 6 Press CONT on the 98458 With the 9845B displaying Local Lockout verify that the 8350A REM light is again lit Again attempt to change the start frequency and perform an instrument preset Verify that this is impossible Now press the LCL key and verify that still no action is taken 7 Press CONT on the 9845B With the 9845B displaying Local verify that the 8350A REM light is off Also verify that all sweep functions can now be modified via the fr
11. RF power unleveled numeric data entry out of range and line power failure If an error condition exists the user can instruct the 8350A to request service from the 9845B by initiating a Service Request SRQ The 9845B can detect whether an SRQ has taken place on the bus by analyzing bit 7 see note below of the Status Byte of the 98034A HP IB Interface Two modes are avail able for analyzing the 98034A Status Byte 1 periodically read the Status Byte or 2 enable bit 7 to interrupt the program when it isset In either case once it is determined that the 8350A has requested service the specific error condition s can then be determined by reading and analyzing the Status Bytes of the 8350 The 8350A has two Status Bytes each consisting of 8 bits with each bit indicating the present status of a particular function or condition See Table 1 for a complete description of the conditions associated with each Status Byte bit The user can analyze these Status Bytes for every SRQ or more simply instruct the 8350A to issue an SRQ only if a specific set of error conditions exists The set of conditions 15 determined by a numeric value passed by the Request Mask function This numeric value is generated by summing the decimal values of each Status Byte bit to be checked This program demonstrates the capability of the SRQ and Status Bytes to detect an error condition NOTE This assumes that the status bits are numbered 0 thru 7 with
12. 1 6 Refer any questions regarding this manual the Manual Changes sheet or the instrument to the nearest HP Sales Service Office Always identify the instrument by model number com plete name and complete serial number in all correspondence Refer to the inside rear cover of this manual for a worldwide listing of HP Sales Service Offices 1 1 General Information Model 8350A Table 1 1 Model 83504 Specifications 1 of 2 SPECIFICATIONS 8350A SWEEP OSCILLATOR with RF Plug in installed FREQUENCY CONTROL FUNCTIONS Range Determined by RF plug in unit used Linearity Refer to RF plug in unit specifications START STOP Sweeps Sweeps up from the START frequency to the STOP frequency Range START and STOP parameters are inde pendent fully calibrated and continuously adjustable over the entire frequency range STOP frequency must be greater than or equal to START frequency CF AF Sweep Sweeps symmetrically upward in frequency centered on the CF Center Fre quency setting AF Frequency width of sweep Continuously adjustable from zero to 10096 of frequency range START STOP and CF AF modes can be interchanged without affecting RF output AF Accuracy Refer to RF plug in unit specifi cations CF Accuracy Refer to RF plug in unit specifica tions CF Resolution 0 02496 4096 points across band AF Resolution 0 1 of full band 1024 points across band 0 012 of full band for 1 8 band or less
13. 5RCA Distribution amp Special Products Div Dept EM New Holland Ave Lancaster PA 17604 6Amphenol North America Bunker Ramo Corp RF Operations 33 Franklin St Danbury 06810 7Two 44 pin printed circuit board extenders and a fuse kit are included with the Model 8350A Accessory Kit Supplied HP Part Number 08350 60020 Refer to Figure 1 1 in this manual HP Part Number 08350 60031 each HP Part Number 08350 60034 HP Part Number 08350 60035 a remote programming interface using the Hewlett Packard Interface Bus HP IB This provides a remote operator with the same control of the instrument available to a manual local operator Remote control is maintained by a system controller desktop computer computer etc that sends commands or instructions to and receives data from the Model 8350A using the HP IB The HP IB is Hewlett Packards implemen tation of the IEEE Standard 488 1978 A complete general description ofthe HP IB is provided in the manual entitled Condensed Description of the Hewlett Packard Interface Bus HP Part Num ber 59401 90030 Model 8350A General Information Power Splitter HP 11667A Adapter Type N Male to SMA Female 2 required 1250 1250 Delay Line gt 1 meter 3 feet in length SMA male 08350 20038 connectors Adapter BNC Female to Male SMA 1250 1200 Mixer Double Balanced 1 to 12 GHz RHG Electronics Part No DM 1 12 0960 0451 1 to 18 G
14. Integers 1 to 9 Alternate Integers 1 to 9 Settings I Alternate Sweep Off W Step keys activated only after a number has been entered REMOTE FUNCTION PROCEDURE Program Code Store Current SV Register Settings l to 9 Resets Stored Register Successive Sweep ALI Register Selected and Current to 9 ALTERNATE Figure 3 9 Storage Registers 2 of 2 31 Operating Information 32 SWEEP SWEEP TRIGGER DESCRIPTION This function Block contains seven keys for control of sweep source and time This block also hasa SWP LED to indicate sweep in progress The SWEEP type keys enable selection of EXT MAN or TIME sweep controls The SWEEP TRIGGER keys enable selection of INTernal LINE EXTernal and SINGLE sources of sweep triggering Lights on keys indicate active function PANEL LAYOUT SWEEP TRIGGER SWEEP INT LINE EXT SINGLE EXT TIME SWP FUNCTIONS INDICATORS SWEEP EXTERNAL Enables sweep input via front or rear panel SWP input SWP INPUT 0 to 10 volts to externally tune plug in oscillator SWEEP MANUAL Enable manual control of sweep voltage via frequency inputs Manual frequency is displayed on FREQUENCY TIME display SWEEP TIME Enables internally timed sweep The triggering for TIME may be one of the following sweep trigger modes INT Enables internal sweep triggering free run auto LINE Enables triggering by power line frequency SWEEP TRIGGER EXT
15. Recalling An U D t N ta gt wv SH Registers 1 through 9 instrument State RECALL n C Registers Alternate Sweep 1 1 through 9 Mode ALT n OFF ALO Undergo Self Test SELF TEST nn These codes functions do not apply to 86200 Series Plug ins Both frequency and power step size i i Table 1 Input Programming Codes 3 of 4 PROGRAM CODE NUMERIC VALUE MODE FUNCTION PREFIX NUMERIC SCALE ACTIVATE FORMAT SUFFIX FACTOR RANGE RESOLUTION SPECIAL HP IB FUNCTIONS OUTPUTSTATUS Service Requests SERVICE REQUEST MASK OUTPUT LEARN STRING Full Learn String INPUT LEARN STRING OUTPUT MICRO j LEARN STRING Micro Learn String INPUT MICRO LEARN STRINGt Active Mode String Cr MODE Output Active QUIT ACTIVE Parameter Value VALU v Status Bytes and Output OUTPUT interrogated UT Parameter Code Parameter Value DISPLAY UPDATE ON DISPLAY UPDATE OFF Single Sweep RESET SWEEP Start Stop TAKE SWEEP Network Analyzer NETWORK Trigger 8410B TRIGGER Set Output Power POWER LEVEL Level oe SWEEP Power Sweep coe E Xu DN PLUG IN ALC SIGNAL CONTROL gt EXTERNAL ALC Leveling Modes CRYSTAL EXTERNAL POWER METER RF Power FILTER ON CW Filter FILTER OFF FI 6 These codes functions do not apply to 86200 Series Plug ins Must be in CW mode CW Filter off Numeric Display Update
16. dB dBm Data Entry Delta A Frequency Frequency Sweep Mode Display Blanking Modulation Blanking Down step Data Entry External ALC External Sweep Sweep Sweep Trigger External Plug in Markers Crystal Markers Frequency Sweep Modes Frequency Sweep Mode Frequency Markers 8350A Frequency Markers Frequency Markers Plug in Crystal Markers GHz Data Entry HP IB Only Functions HP IB Special Functions Instrument Preset Instrument State Intensity Crystal Markers Crystal Markers 8350 Operating Information Table 3 2 Functional Block Index 2 of 2 Intensity Markers 8350A Frequency Internal ALC ALG AOU Soke aad mood Internal Sweep Trigger Sweep Sweep Trigger Learn String Only Level Power Power 1 Line Sweep Trigger Sweep Sweep Trigger Local key Instrument Stale Manual Sweep Sweep Sweep Trigger Mi to M5 Frequency Markers Crystal Crystal MAPK GIS hie Fx is oo evento iare be at Marker Delta Frequency Markers Marker Sweep Frequency Markers Marker Center Frequency Frequency Markers Meter ALC ALC Mode dana pu apa Nasa Millisecond Pata EOY ace
17. 08410 60146 0 Model 8350A Local Operation X Y RECORDERS The 8350A is equipped with outputs for controlling X Y analog recorders Some of the HP X Y recorders that may be used with the 8350A are 7010B 7015B 7035B 7004B 7034A 7044 7045 7046 7047 The available required signals for proper operation with an X Y recorder X INPUT Typically SWEEP IN OUT Supplied by BNC connector on front or rear panel Y INPUT Y axis voltage On 8755S Frequency Response Test Set this would be AUX for channel or AUX B for channel 2 For 8410B systems the 8412 display provides amplitude and phase outputs PEN LIFT Signal line for controlling remote pen up down Pen up is open contact or 5 volts Pen down current sink is contact closure to ground or 0 volt Supplied by BNC connector on rear panel or pin 10 on 8350A Programming Connector RECORDER SERVO MUTE 7044 7045 7047 only Control line that mutes the power to the recorder servos for 100 ms at bandswitch when using multi band plug ins or designated points Pin 1 on the 8350A Programming Connector PEN LIFT REQUEST Allows a pen lift to be initiated by remote control independent of the present pen lift status Pin 3 on the 8350A Programming Connector INVERSE PEN LIFT Inverse function of Pen Lift pin 23 on 8350A Programming Connector The pen lift control line is assigned to a pin on the Remote Control connector of the X Y recorder For a
18. CH 1217 Meyrin 2 Geneva Switzerland Im Japan Yokogawa Hewlett Packard Ltd 29 21 Takaido Higashi 3 chome Suginami ku Tokyo 168 5952 9306 Printed in U S A 8350A 9845B 1 Supersedes None OCTOBER 1980 Introductory Operating Guide for the HP 8350A Sweep Oscillator with the HP 9845B Desktop Computer INTRODUCTION This programming note is a guide to the remote operation of the HP 8350A Sweep Oscillator and appropriate HP 83500 Series Plug in using the HP 9845B Desktop Computer Included in this guide are the system connections for remote operation and several example programs with descriptions of each step The 83504 is fully compatible with the Hewlett Packard Interface Bus HP IB When used with a controiler such as the 9845B complete control of the sweep mode frequency limits frequency markers power level and all other front panel controls can be achieved REFERENCE INFORMATION For further information on the HP Interface Bus the following reference should prove helpful Condensed Description of the Hewlett Packard Interface Bus HP Literature No 59401 90030 Complete reference information on the 8350A can be found in the 8350A Sweep Oscillator Operating and Service Manual HP Part No 08350 90001 For information on operating the 9845B the following references are available 9845 Operating and Programming Manual HP Part No 09845 91000 98458 I O ROM Programmin
19. CW Filter On Off 1 Off 0 Power Sweep On Off POWER FUNCTIONS Slope On Off On 1 Off 0 Power Sweep On6Off CRYSTAL MARKER MODES Amplitude Mkr On Off On 1 Off 0 Intensity Mkr On Off CRYSTAL MARKER FREQUENCY 000000 1 0000001 000000 1 0000001 000000 1 0000001 00000000 1 MHz 00000001 10 MHz 00000010 50 MHz 000000 1 1 Ext Freq FM INPUT SENSITIVITY 20 MHz V 6 MHz V 00000000 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00000000 END OF MODE STRING NOT DEFINED Figure 3 17 HP IB Only Functions 7 of 7 51 52 OPERATION AL Q HH rmn ann an m HT rir RAP AE aaa apad ta e i EAR net Atte e FAR LI a A Sr ARA La aL 8350A 9988 OOOO OOOH f OOOO 1 DOE 1 SWEEP OSCILLATOR M et PER HH ELS TNT at HAN Loi e i at tta PSI ra t reU AIR Idea t EAA AAOS vd a tio ra NNI ABO aar A tg A M H r wv E 8350 SWEEP OSCILLATOR Copyright HEWLETT PACKARD COMPANY 1980 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA CALIFORNIA 95404 MANUAL PART NO 08350 90001 Microfiche Part No 08350 90002 Printed AUGUST 1980 Kip HEWLETT PACKARD Model 8350A Local Operation LOCAL OPERATION IN
20. Display Functions Control group for a description CNTR TRIG Counter Trigger HP 5343A Frequency Counter only Output for controlling the external trigger input of the HP 5343A frequency counter STOP SWEEP Input for stopping the progress of a forward sweep When input is 0 to 0 8 volt sweep 15 stopped RF outputis a constant CW frequency Sweep continues when input voltage returns to greater than 2 volts or open circuit Usable with the HP 5343A Frequency Counter and CNTR TRIG to select and measure frequency points along the sweep FM INPUT Input for frequency modulation or phase lock error signal for the plug in This input is passed through to the plug in and processed by the plug in only See plug in specifications for frequency deviation and sensitivity AM INPUT Input for external amplitude modulation of the plug in This input is passed through to the plug in See plug in specifications for amplitude input range ALT SWP INTERFACE Connects via cable HP Part No 8120 3174 to 8755C to provide Alternate Sweep function PROGRAMMING CONNECTOR See Figure 16 for pin designation 24 Model 8350 Marker Pulse Pen Lift Request Sweep Alternate Stop Fwd Sweep Request 5 Volt 100 ma RF Blanking RF Blank Request Ext Trigger Input Pen Lift Recorder Mute Blanking Negative Logic True is logical 9 Positive Logic D Input O Output Local Operation Programming Connector Descriptio
21. Enables external triggering of sweep via rear panel auxiliary connector pin 9 A two volt trigger 20 volts max must be supplied to auxiliary connector SINGLE Selects and or triggers or aborts single sweep LIMITATIONS CONCERNS l SWEEP TRIGGER controls work only in TIME sweep mode 2 Using the step keys with sweep time forces specific values in a 1 2 5 sequence such as 10015 20ms 50ms 100ms etc No step value can be set for sweep time 3 When first engaged single sweep is selected if in a different sweep trigger mode If presently in single sweep this triggers a new sweep Figure 3 10 Sweep Sweep Trigger 1 of 2 Model 8350A Model 8350 Operating Information LOCAL FUNCTION PROCEDURE Function Activate On Off Step Keyboard SWEEP TYPE External Range and Resolution Range Present Sweep Width Resolution 0 01 of present sweep Range 0 01 to 100 sec Resolution 0 001 sec SWEEP TRIGGER Internal External Volts Single Activates Values must end with terminator GHz MHz S or mS The step size may not be set for time Each mode except TIME disables other modes The limit for broad band sweeps is higher than 0 01 second Wee 2 to 5 Volts rue D Key and Triggers and Triggers REMOTE FUNCTION PROCEDURE Code Function MN GZ Sweep Type Manual Frequency i KZ HZ Ti 0 01 100 0 001 SC ax second s
22. Incremental Attenuation 0 to 70 dB in 10 dB steps Calibration Accuracy 0 1 dB at all steps HP 8478B HP 5343A HP 778D HP 779D HP 3400A HP 3312A HP 423B HP 11567A HP 11170B HP 8495A Option 890 Model 8350A General Information Table 1 4 Recommended Test Equipment 3 of 4 o mme Critical Specifications iaconimendeu Model IEE Attenuation 3 dB 0 5 dB 8491 B FROR 003 Frequency Range 0 01 to 12 4 GHz Maximum Input Power gt 20 dBm Attenuator Attenuation 6 dB 0 5 dB Frequency Range 0 01 to 12 4 GHz Maximum Input Power 2 20 dBm Attenuator HP 8491B Option 006 Attenuation 10 0 5 dB Frequency Range 0 01 to 12 4 GHz Maximum Input Power 20 dBm Attenuator HP 8491B Option 010 Attenuation 20 0 5 dB Frequency Range 0 01 to 12 4 GHz Maximum Input Power 20 dBm Attenuator HP 8491B Option 020 Adjustable Short Maury Microwave 1953 2 Frequency Range 1 8 to 12 4 GHz Impedance 50 1 5 Ohms Adjustable AC Line Transformer Select to cover line voltage used 100 120 volt General Radio WSMTB General Radio WIO0HM 73 220 240 volt Line Voltage Monitor To be used with above Adjustable AC Line Transformers 120 volt Monitor 240 volt Monitor RCA 120B RCA WV 503A Frequency Meters Frequency Accuracy lt 0 17 Calibration Increments l
23. Swp by EXAMPLE PROGRAM 3 Setting Up A Sweep Press STOP Type 5 Swp 719 Press STORE 2 Modify the output statement s by editing the necessary lines and changing the OUTPUT 719 to OUTPUT Swp and OUTPUT 719 USING 100 to OUTPUT Swp USING 100 3 Re run the modified program using the same operation steps as above TITAS Typically the sweeper is programmed for the proper sweep frequency range sweep time power level and marker frequencies for a test measurement This program sets up the sweeper for a general purpose situation using several dedicated image statements Note that not all parameters need to be reprogrammed every time NOTE This program expects an 83500 Series Plug in that covers the frequency range of at least 3 to 7 GHz If using a plug in with a different frequency range change the values in lines 60 90 and 100 to the appropriate values If using an 86200 Series Plug in then do not enter line 70 PROGRAM 3 PROGRAM 3 EXPLANATION Line 10 Image statement for setting the Start and Stop Sweep frequencies in GHz Line 20 Image statement for setting the Sweep Time in milliseconds Line 30 Image statement for setting a Frequency Marker by marker number and fre quency in GHz Line 40 Image statement for setting the Output Power Level in dBm Line 50 Presetthe sweeper to a known state instrument preset an
24. tion On Off Marker Off 0 9 NOTES 1 Program codes of the form XXm use m to turn the function On or Off 1 or 0 For the storage register functions the n is 1 through 9 Marker 1 2 Sweep On Off Milliseconds MHz Marker Off Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 Network Analyzer Trigger 8410B Output Active Parameter Output Learn String Output Mode String Output Interrogated Parameter Output Status bytes Output Micro Learn String Power Level Power Sweep On Off Recall Register RF Power On Off Service Request Mask RF Blanking On Off Reset Sweep Seconds Frequency Step Size Shift Function Slope On Off Manual Sweep Power Step Size Step Size Sweep Time Save Register external Sweep Take Sweep Internal Sweep Trigger Line Sweep Trigger External Sweep Trigger Single Sweep Step Up Increment CW Vernier Acceptable Numeric Data 2 The 8350A ignores spaces plus signs negative signs except when valid and any unexpected characters Program codes can be upper or lower case alpha characters For more information call your local HP Sales Office or nearest Regional Office Eastern 201 265 5000 Midwestern 312 255 9800 Southern 404 955 1500 Western 213 970 7500 Canadian 416 678 9430 Ask the operator for instrument sales Or write Hewlett Packard 1501 Page Road Palo Alto CA 94304 in Europe Hewiett Packard S A 7 rue du Bois du Lan P O Box
25. to return to the previous mode press the appropriate key e g START etc and the display will return to reading the appropriate frequencies and the gt 0 lamp will be lit Frequency vernier can be set by the control data entry keyboard or step keys The displayed vernier adjustment can be up to 0 05 of the frequency band being swept When in a sub band of a multiband plug in for example the 0 01 2 GHz band of the 83525 01 8 4 GHz plug in the adjustment range will be 0 05 of the sub band This feature allows for better frequency resolution than would otherwise be possible with the vernier when using a multiband plug in The vernier adds its value to the appropriate frequency parameter and then resets to zero when the adjustment exceeds 0 05 for continuous adjustment ZEROING VERNIER To set the vernier to zero press VERNIER 0 MHZ ms and the 7 0 lamp will turn off FREQUENCY OFFSET The frequency offset feature allows the CW frequency and or the effective center frequency of the swept range to be shifted by any amount up to the full range of the plug in 1 enter an offset press SHIFT VERNIER and enter the offset by either the left FREQUENCY control or data entry keyboard The amount of offset in GHz or MHz will be shown in the left FREQUENCY display and the 0 lamp will be lit To exit the displayed offset mode press the appropriate mode key i e START CW etc The sweep limits displayed wil
26. 83504 refer to Section IL Installation in the Model11869A Operating and Service Manual To install an HP 83500 Series RF plug in unit into the Model 8350A mainframe a Set the Model 8350 mainframe LINE switch to OFF b Remove all connectors and accessories from the front and rear panel connectors to prevent them from being damaged c Position the RF plug in unit latching handle in the fully raised position The latching handle should spring easily into the raised position and be held by spring tension d Insure that the mainframe RF plug in channel is clear align the RF unit in the channel and slide it carefully into place towards the rear of the channel It should slide easily without binding Thedrawerlatch handle slot will engage with the locking pin just before the RF plug in is fully seated in position f Press the latch handle downward while still pushing in on the RF plug in until the drawer latch is fully closed and the front panel of the RF plug in is aligned with the mainframe front panel 2 40 Bench Operation 2 41 Theinstrument cabinet has plastic feet and a foldaway tilt stand for convenience in bench operation The tilt stand inclines the instrument for ease of operating the front panel controls and to allow the RF plug in to be removed easier The plastic feet provide clearance for air circulation and make the instrument self aligning when stacked on other Hewlett Packard full rack width modula
27. Byte 3 76 Receiving The Remote Message 3 77 The Remote message causes the 8350A to switch to remote mode It has two parts 1 remote enable and 2 address to listen The Sweep Oscillator s output and all other controls do not change with the local to remote transition Operating Information 3 78 The REM light turns on only when the 8350A is in remote mode and after receiving its first Data Message The ADRS D light turns on when the 8350A is addressed to talk or listen 3 79 Receiving The Local Message 3 80 The 8350 returns to front panel control when it receives the Local message Its output and all other controls do not change with the remote to local transition 3 81 When the 8350A goes to local mode the front panel REM indicator turns off However the ADRS D indicator would still illuminate if the 8350A were addressed 3 82 The local message is the means by which the controller sends the Go To Local GTL bus command The front panel LCL key can also return the 8350A to local mode However pressing the LCL key might interrupt a Data message to the 8350A and this would leave the 8350A in a state unkown to the controller This situation could be avoided by sending the Local Lockout message which disables the LCL key 3 83 Receiving The Local Lockout Message 3 84 After receiving the Local Lockout message the 8350A front panel LCL key is disabled in addition to all the other front panel keys With local
28. CHECK Self test Each time the Sweep Oscillator is turned on or INSTR PRESET button is engaged the instrument performs a series of self tests taking about one second to complete When the self test is complete the instrument will be in the preset mode if a plug in is installed or the left most frequency display will have an E001 error code indicating no plug in is installed If error code E016 is observed refer to paragraph 3 103 If another error code is noted the Sweep Oscillator requires service refer to paragraph 3 107 Plug in related error information E050 to E059 is in the plug in manual l Set LINE switch to ON Observe display in START STOP mode with display frequency equaling plug in range or E001 if no plug in is installed MAIN CHECK Equipment RF Plug in HP 83500 series or HP 86200 series with adapter HP 11869A 18 GHz or less Belt TP cr HP 1220A or HP 1740A B Crystal Detector 8473C or a crystal detector that will cover frequency range of interest Attenuator 10 dB oe at ohare te 8491B Option 010 Cables BNE 10 BNC 3e jus puce bo PRI ER etri Seba 10503A 123 cm Setup 8350A SWEEP 83500 OSCILLATOR SERIES PLUG IN __BSCILLOSCOPE 84730 10 dB ATTENUATOR CRYSTAL 84918 010 Connect the equipment listed above as shown in above diagram Figure 3 3 Local Operator s Check 1 of 2 Model 8350A Operating Information
29. GHz input prompts for the step size of the sweep Store it in C Line 4 Determine the number of frequency steps in sweep store in D Line 5 Set the CW Step Size Line 6 Setthe CW frequency to the start frequency value Line 7 lterate the CW step D times Line 8 Program the Step Increment Up function then wait 20 msec for settling Line 9 Continue step iteration then go to line 6 The equipment setup is the same as in the previous example Reset the 9825 erase the 9825 memory then type in the above program Run the program The 8350 will undergo an instrument preset and enable the square wave modulation Then perform the following 1 The 9825 will display Start Freq GHz Answer this prompt by inputting the desired Start frequency value in GHz of the sweep then press CONTINUE 2 The 9825 will display Stop Freq GHz Answer this prompt with the desired Stop frequency in GHz of the sweep then press 3 The 9825 will display Step Size GHz Answer this prompt with the desired Step size in GHz of the sweep then press CONTINUE 4 The8350 CW frequency will be programmed to the Start frequency of the sweep selected Then the CW frequency is repetitively incremented by the step size value The sweep is then restarted after reaching the stop frequency To stop the program press STOP or RESET Part of the time involved in changing CW fre quencies is updating the numeric
30. LED display This time can be reduced by blanking the numeric display via the Display Update On Off function This can be implemented by modifying line 0 to wrt 719 IPMD1DUO Re run the modified program Certain error conditions of the 8350A can be detected by the 9825 so that corrective action can be taken Examples of some detectable error condi tions are RF power unleveled numeric data entry out of range and line power failure If an error condition exists the user can instruct the 8350A to request service from the 9825 by initiating a Service Request SRQ The 9825 can detect whether an SRQ has taken place on the bus by analyzing bit 7 see note of the Status Byte of the 98034A HP IB Interface Two modes are available for analyzing the 980344 Status Byte 1 periodically read the Status Byte or 2 enable bit 7 to interrupt the program when it is set n either case once it is determined that the 8350A has requested service the specific error condition s can then be determined by reading and analyzingthe Status Bytes ofthe 8350 The 8350A has two Status Bytes each consisting of 8 bits with each bit indicating the present status of a particular function or condition See Table 1 for a complete description of the conditions associated with each Status Byte bit Theusercan analyzethese Status Bytes for every SRQ or more simply instruct the 8350A to issue an SRQ only if a specific set of error conditions exists The set
31. NA Unleveled Falue on 2580 Numeric 5 Parameter Altered to Default Value Self Test Failed Bit Functions not usable with 86200 Series Plug ins and 11869A Adapter Line 60 Line 70 Line 80 Line 90 Line 100 Line 110 Line 120 Line 130 Enable the controller to accept an inter rupt from the 98034A The 9845B displays CW Freq GHz input prompts for the desired CW frequency value in GHz Store it in the variable F Set the CW frequency as determined by SE Wait 100 milliseconds to allow the 8350A to interrupt Go to line 70 Location of the interrupt service routine Read the Status Byte of the 8350A and store it in A Check bit 6 of the 8350A Status Byte to see if it generated the SRQ go to line 160 if not Check bit 0 of the 8350A Status Byte for an Altered Parameter error Print on the CRT display Parameter Altered if one exists 11 Line 140 Check bit 5 of the 8350 Status Byte for a Syntax error Print on the CRT display Syntax Error if one exists Line 150 Clear the 8350A Status Byte to enable another SRQ Line 160 Re specify bit 7 of the 98034 to cause an interrupt Line 170 Re ena5le interrupts from the 980344 Line 180 Return from the interrupt service routine to the main program The equipment setup is the same as the previous example Reset the 9845B scratch the 9845B memory then t
32. Oscilloscope 11664A Detectors 3 each 8750A Storage Normalizer The 8755 1s used for scalar transmission and reflection measurements requiring up to 60 dB of dynamic range and for absolute power measurement from 50 dBm to 10 dBm The 8350 has the following features designed specifically for use with the 8755S Frequency Response Test Set RF Square wave Modulation By engaging the key an internally generated squarewave modulation of the RF output is available thus eliminating the need for external modulating equipment A jumper internal to the 8350A enables the square wave modulation frequency to be changed to 1 KHz see section 5 of the Operating and Service manual for details 15 Local Operation Alternate Sweep Function The ALTn function of the 8350A allows two different frequency and power settings to be swept on successive sweeps The front panel setting and the setting stored in a memory register location n 1 9 can be selected for alternate sweeps The Alternate Sweep Function will not work properly with the 8755A or 8755B See Figure 9 fora sweep display of the ALTn function when used to view a bandpass response at different resolutions and offsets 0 25 dB DIV 10 dB BIV Figure 9 Alternate Sweep Function Display Some other features enhancing the convenience and versatility of the 87553 are Marker A The MKR A function is useful when using alternate sweep in overlapping differe
33. Refer to Table 1 2 Pen Lift Output to control the pen lift function ofan X Y recorder Refer to Table 1 2 for maximum sink current rating Counter Trigger CNTR TRIG Output for controlling the external trigger input of the HP 5343A Microwave Frequency Counter Rear panel BNC connector Stop Sweep Input for stopping the progress of a forward sweep Rear panel BNC connector General Information Model 8350A Table 1 2 Model 83504 Supplemental Characteristics 1 of 2 SUPPLEMENTAL CHARACTERISTICS 8350 SWEEP OSCILLATOR with RF Plug in installed INPUT OUTPUT SIGNAL CHARACTERISTICS Frequency Marker Output Rectangular pulse typi cally 5 volts peak available from the POS Z BLANK connector on the rear panel Source impedance is approximately 000 ohms External Sweep Sweep is controlled by an External Sweep Input signal applied to the front or rear panel SWEEP OUTPUT SWEEP INPUT con nectors The External Sweep Input must be zero volts at start of sweep increasing linearly to 10 volts at the end of sweep Sweep Qutput Direct coupled sawtooth zero to approximately 10 volts at front and rear panel SWEEP OUTPUT SWEEP INPUT connectors concurrent with swept RF output Zero volts at start of sweep approximately 10 volts at end of sweep regardless of sweep width In CW mode dc output is proportional to the RF plug in unit full band frequency In SHIFT CW mode a 0 to 10 volt ramp is output regardless
34. SIZE This key is used to enter a frequency or power increment to be used with the UP or DOWN key The STEP SIZE key is pressed before the quantity is entered frequency step that is entered is common for START STOP CF CW AF VERNIER OFFSET MARKER and MANUAL SWEEP parameters power step is used for varying POWER LEVEL POWER SWEEP and SLOPE Default values are assigned at power on and instrument preset for step sizes until new values are entered Note that a step size cannot be setfor sweep time The keyboard and step keys affect the last active function The entered Step Size is not displayed Example To set a 250 MHz step size Press After this each time the UP or DN key is pressed the active frequency parameter will change by 250 MHz SHIFT key BLUE This key is used to activate the functions coded in blue and some special functions Thelampin the center of this key is on when the key is active Example Press MARKERS ALL OFF Pressing SHIFT OFF turns off all markers The SHIFT key is also used to set the HP IB address Press SHIFT LCL the FREQUENCY TIME display will indicate the present HP IB address number The address may be changed to any value between 0 and 30 by using the keyboard to enter a number and the GHz MHz or dBm key as a terminator The 8350A is factory preset for an HP IB address of 19 NOTE Address number 21 is normally reserved for calculator addressing and HP IB interface f
35. STATE instrument Preset The Instrument Preset INSTR PRESET key sets the 8350A into the following predetermined state the RF output is swept over the full frequency range of the RF plug in at the specified maximum leveled power level an RF OFF condition can be selected by a presetable configuration switch located within the RF plug in the internal square wave AM is off and the frequency markers are off Instrument Preset also causes an internal analog and digital self test to occur If certain internal errors or failures are detected during the self test or during normal operation of the 8350A they are indicated via error code messages the formof Ennn where n 0 through 9 read from the left FREQUENCY display Local Operation The Local LCL key is used to return the 8350A to local control from the remotely controlled state The REM LED indi cates when the 8350A is being controlled remotely The ADRS D LED indicates when data is being transmitted or received over the HP IB Model 8350 General Information Table 1 2 Model 8350A Supplemental Characteristics 2 of 2 REMOTE PROGRAMMING HP IB instrument Control All front panel controls except the line power switch may be controlled or programmed remotely The 8350A is fully com patible with the HP IB The 8350A has both input and output capability providing complete con trol of the instrument state The HP IB address can be displayed on the front panel a
36. Set the 8350A to a predefined instru ment state enable the square wave modulation and disable CW Filter 1 Adjustthe 8350A toa preferred instrument state using the Start Frequency Stop Frequency and Sweep Time controls on the 98458 2 Press 3 The present values of the Start Frequency Stop Frequency and Sweep Time are sequentially interrogated and then printed on the CRT of the 9845B pipa Line 20 The 9845B displays Start Freq GHz p input prompts for Start frequency of the sweep Store it in the variable A Line 30 The 9845B displays Stop Freq GHz input prompts for the stop frequency of the sweep Store it in Line 40 The 9845B displays Step Size GHz input prompts for the step size of the sweep Store it in C Line 50 Determine the number of frequency steps in sweep store in D Line 60 Set the CW Step Size Line 70 Set the CW frequency to the start frequency value Line 80 Iterate the CW step D times Line 90 Program the Step Increment Up func tion Line 100 Wait 20 milliseconds for settling Line 110 Continue step iteration Line 120 Go to line 70 The equipment setup is the same as in the previous example Reset the 9845B scratch the 9845B memory then type in the above program Run the program The 8350A will undergo an instrument preset and enable the square wave modulation Then perform the following 1 The 98458 will dis
37. Temporarily stops program execution Line 110 Sets 8350A to remote and performs an Instrument Preset Line 120 Stops program execution To verify and investigate the different remote modes do the following on the 85A This the program memory 2 Press INSTR PRESET on the 8350A 3 Type in the above program 4 Press SHIFT CLEAR RUN on the 85 5 With the 85A displaying Remote verify that the 8350A REMote light is lit From the front panel attempt to change the start frequency and verify that this is impossible Verify that the instrument Preset key and all other keys except LCL are disabled Now press the LCL key and verify that the 8350A REMote light is off and that you can modify any of the sweep functions 6 Press CONT on the 85A With the 85A dis playing Local Lockout verify that the 8350A REMote light is again lit Again attempt to change the start frequency and perform an instrument preset Verify that this is impossible Now press the 8350A LCL key and verify that still no action is taken 7 Press CONT on the 85A With the 85A displaying Local verify that the 8350A REMote light is off Also verify that all sweep functions now can be modified via the front panel controls CONT on the 85A Verify that the 8350A has an Instrument Preset and the REMote light is on The Output OUTPUT 719 statement does two things one it performs a REMOTE 719 and seco
38. The alphanumeric data string of the write statement can bea concatenation of character strings and or variables The data can be specific codes free field formatted data or reference specific format fmt statement For example to program the CW Frequency CW one program code sequence is CW followed by the frequency in GHz then GZ If the frequency is to be 7 555 GHz then the string CW7 555GZ will suffice However if the frequency were to change then a variable F could indicate the frequency in GHz and the program string could be CW F GZ Using a format statement also allows a specific number of digits to be passed thereby avoiding any unex pected round off errors NOTE This program expects 83500 Series Plug in that covers the frequency 7 555 GHz lf using a plug in that does not cover this frequency range then the value in line 1 should be changed to an appro priate value PROGRAM 2 _ PROGRAM 2 EXPLANATION Line 0 Puts the 8350A into a predefined state via instrument preset then fixes data to 2 decimal places Puts the 8350A in CW mode and programs a CW frequency of 7 555 GHz the 9825 displays CW 7 555 GHz then stops program execution The 9825 displays CW in GHz The user is prompted to input a new CW frequency value which is stored in the variable Line 1 Line 2 Line 3 Print on the internal strip printer the programmed CW frequency
39. To achieve design performance on the bus proper voltage levels and timing relationships must be main tained If the system cable is too long or if the accumulated cable length between instruments is too long the data and control lines cannot be driven properly and the system may fail to perform Therefore the following restrictions must be observed a With two instruments in a system the cable length must not exceed 4 meters 12 feet b When more than two instruments are con nected on the bus the cable length to each instrument must not exceed 2 meters 6 feet per unit c The total cable length between all units cannot exceed 20 meters 65 feet HP IB Cable HP 10833A HP 10833B HP 10833 HP 10833D 1 3 3 ft 2 m 6 6 ft 4 m 13 2ft 0 5 m 1 6 ft Figure 2 6 HP IB Interface Cables Available 2 8 Model 8350A Installation Table 2 4 Model 83504A Mating Connectors 8350A Connector Mating Connector SWEEP OUTPUT 1251 0256 Specialty Connector SWEEPINPUT 25 P118 1 front panel J4 HP IB INTERFACE BUS 24 Pin Micro Ribbon 1251 0293 Amphenol 57 30240 J5 POS Z BLANK BNC 1250 0256 Specialty Connector 25 118 1 76 Z BLANK 1250 0256 Specialty Connector 25 118 1 J PEN LIFT BNC 1250 0256 Specialty Connector 25 P118 1 J8 SWEEP OUT IN BNC 1250 0256 Speciality Connector rear panel 25 P118 1 J9 CNTR TRIG BNC 1250 0256 Specialty Connector 25 P118 1 J10 STOP SWEEP BNC
40. Upon initial power on the HP IB address will need to be set to the desired code through the front panel SHIFT LOCAL function The address will be retained as long as the battery is charged to a sufficient level Refer to the Battery Operation Option 001 paragraph in this section of the manual further information on Option 001 instruments 2 17 HP IB address labels are available by q toward rear of 8350A Installation ordering HP Part Number 7120 6853 each See Figure 2 4 These labels allow easy reference to the HP IB address of each system component HP Part No 7420 9853 j Figure 2 4 HP IB Address Label 2 18 11869A Switch Settings for HP 86200 Series RF Piug ins 2 19 The identification switch on the Model 11869 RF Plug in Adapter must be preset when using the adapter with HP 86200 Series RF Plug ins in the Model 8350A The setting of the identification switch is interrogated at power on when the 8350A INSTR PRESET button is pressed or when an HP IB Instrument Preset LOGIC 1 OPEN LOGIC 0 GROUND Figure 2 3 851 Address Switch Installation Model 8350A Table 2 3 Address Codes Address Characters 851 Address Switch Settings MSB Ab A4 A3 Ai SP O m C g gt e AQ 00 20 UA D GQ O i As J K L M N Q R S T U V W X Y Z A V command is received If the identification switch is s
41. any function on the 8350A the con troller must pass specific program codes and data to the sweeper The statement that allows this is the Output OUTPUT statement The alphanumeric data string of the output statement can be a concatenation of character strings and or variables The data can be specific codes free field formatted data or reference a specific image IMAGE state ment For example to program the CW Frequency Press Ur N With the 9835A displaying Remote verify that the 8350A REM light is lit From the front panel verify that the start frequency cannot be changed Verify that the INSTR PRESET key and all other keys except LCL are disabled Now ey and verify that the 8350A REM light is off and that you can modify any of the sweep functions 6 Press on the 9835A With the 9835A displaying Local Lockout verify that the 8350A REM light is again lit Again attempt to change the start frequency and perform an instrument prese Verify that this is impossible Now press the 1 key and verify that still no action is taken on the 9835 With the 2 Local verify that the 8350A REM light is off Also verify that all sweep functions can now be modified via the front panel controls 8 Press onthe 98354 Verify that the 8350A has undergone an Instrument Preset and the REM light is on The Output OUTPUT 719 statement does two things one it performs a REMOTE 719 a
42. by conducting a Serial Poll or by executing the Output Status function both of which access Status Byte information The RQS state and the bus SRQ line are cleared only by executing a Serial Poll 3 90 Sending The Status Byte Message 3 91 After receiving a Serial Poll Enable com mand SPE and when addressed to talk the 8350A responds by sending its Status Byte mes sage as indicated in Table 3 8 A second status byte is available but must be accessed via the Output Status function When the seventh most signifi cant bit bit 6 Request Service of the Status Byte is true one an SRQ has occurred See Service Request for the conditions causing a Service Request Bit 4 indicates whether a change has occurred in the Extended Status Byte If Bit 4 is Operating Information true then the second status byte should be accessed via the Output Status function to deter mine the cause of the status change All other bits indicate the present status of the noted function The bits are true one if and only if the associated function condition is true To select an SRQ fora particular set of circumstances both Status Bytes can be masked with the Service Request Mask function The mask for each byte is determined by summing the decimal values of each selected function condition that is desired The default Service Request Mask Value is 00000000 or decimal 0 See Table 3 8 for decimal values of each Status Byte bit 3 92 Sendin
43. can also be set to Local by pressing the LCL key Note that the 8350A does not respond to the LCL key if the Local Lockout command has been executed This command dis ables all front panel functions including the LCL key SERVICE REQUEST The 8350A can initiate a Service Request SRQ whenever one of the following conditions exist Error in syntax Parameter value modified to default value Hardware failure End of sweep Further information can be obtained by conducting a Serial Poll or by executing the Output Status command both of which access Status Byte infor mation The SRQ is cleared only by executing a Serial Poll To select an SRQ for a particular set of circumstances the Request Mask function can be used to select which of the bits in the first Status Byte can cause an SRQ The mask value is deter mined by summing the decimal values of each selected function condition that is desired The default Request Mask at power on is 00000000 or decimal 0 This mask value is reset to the default value only at power on STATUS BYTE The 8350 responds to a Serial Poll by sending its status byte as indicated in Table 2 A second status byte is available but must be accessed via the Output Status command When Bit 6 Request Service of the Status Byte is true one an SRQ has occurred See Service Request for the conditions causing a Service Request Bit 4 indicates whethera change has occurred in the Extend
44. control g The Clear Lockout Set Local Message This causes all devices on the bus to be removed from local lockout and revert to local This message also clears the remote message for all devices on the bus h The Require Service Message A device can send this message at any time to signify that the device needs some type of interaction with a controller The message is cleared by sending the device s Status Byte message if the device no longer needs service i The Status Byte Message A byte that represents the status of a single device on the bus Within this byte the seventh most significant bit bit 6 of bits 0 through 7 indicates whether the device has sent a Require Service message The remaining bits indicate the present operational conditions defined by the device This byte is sent from a talking device in response to a serial poll operation performed by a controller j The Status Bit Message byte that represents the operational conditions of a group of devices on the bus Each device responds on a particular bit of the byte thus identifying a device dependent condition This bit is typically sent by devices in response to a parallel poll operation by a controller k The Pass Control Message This trans fers the bus management responsibilities from the active controller to another controller L The Abort Message The system con troller sends this message to unconditionally assume control of the bus This
45. e SECTION V ADJUSTMENTS presents procedures required to properly adjust and align the Model 8350A Sweep Oscillator mainframe after repair Refer to the Oper ating and Service Manual of the specific RF plug in used for adjustments related to the RF plug in f SECTION VI REPLACEABLE PARTS provides information required to order all parts and assemblies g SECTION MANUAL BACKDATING CHANGES provides backdating informa tion required to make this manual com patible with earlier shipment configurations h SECTION VII SERVICE provides an overall instrument block diagram with troubleshooting and repair procedures Each assembly within the instrument is covered on a separate Service Sheet which contains a circuit description schematic diagram com ponent location diagram and troubleshoot ing information to aid the proper mainten ance of the instrument 1 4 Supplied with this manual is an Operating Information Supplement This is simply a copy of the first three sections of the manual which should be kept with the instrument for use by the instrument operator 1 5 On the front cover of this manual is a Microfiche part number This number may be used to order 10 by 15 centimeter 4 by 6 inch microfilm transparencies of the Manual Each microfiche contains up to 60 photo duplicates of the manual pages The microfiche package also includes the latest Manual Changes sheet as well as all pertinent Service Notes
46. hopefully within the passband ornear rerun the program Being able to save a specific instrument state is helpful when it is needed several times in a test or measurement procedure The user could save the instrument state by manually logging the important sweep parameters such as frequency range power level ALC modes etc then re inputting them at the appropriate time A somewhat simpler approach is to save the instrument state in one of the 8350A internal storage registers then recall it when needed PROGRAM 4 However this is nota permanent solution unlessthe 8350A Non volatile Memory option Option 001 is used A more permanent solution is to use the PROGRAM 4 EXPLANATION Output Learn String function of the 8350 so that the 9825 can learn then store a data string that Line 0 Set the length of the AS string to 116 describes the present instrument state on a tape characters cartridge or in its internal memory Once an Line 1 Set up an buffer named Learn that instrument state is stored or learned the 8350A can uses the string A for data storage The then be restored to that state using the Input Learn buffer type selected is a byte data fast String function The power of these instrument read write buffer Learn Teach functions are demonstrated by the following program usng the 9825 fast data transfer function Line 2 Set the 8350A to a predefined state via instrument preset and enable the square
47. in D Line 60 Set the CW Step Size Line 70 Set the CW frequency to the start frequency value Line 80 Iterate the CW step D times Line 90 Program the Step Increment Up function Line 100 Wait 20 milliseconds for settling Line 110 Continue step iteration Line 120 Go to line 70 The equipment setup is the same as in the previous example Reset the 9835A scratch the 9835A memory then type in the above program Run the program The 8350A will undergo an instrument preset and enable the square wave modulation Then perform the following 1 The 9835A will display Start Freq GHz Answer this prompt by inputting the desired Start frequency value in GHz of the sweep then press CONTINUE 2 The 9835A will display Stop Freq GHz 7 Answer this prompt with the desired Stop frequency in GHz of the sweep then press 3 The 9835A will display Step Size GHz Answer this prompt with the desired Step si in GHz of the sweep then press CONTIN 4 The 8350A CW frequency will be programmed to the Start frequency of the sweep selected Then the CW frequency is repetitively incre mented by the step size value The sweep is then restarted after reaching the stop frequency To stop the program press STOP Since part of the time involved in changing CW frequencies is in updatingthe numeric LED display if this could be defeated the CW frequency time can be optimized Note that one drawbac
48. interconnections on the Model 8350A Sweep Oscillator mainframe These are the RF Plug in Interface Connector J2 and the Power Supply Interface Connector J3 J2 and J3 are visible at the rear of the RF plug in channel A complete listing of pins and the associated signals and voltages for these con nectors are listed on the overall instrument Wiring List in Section VIII Service of this manual 2 26 Mating Connectors 2 27 All of the externally mounted connectors on the Model 8350A are listed in Table 2 4 Opposite each mainframe connector is an in dustry identification the HP part number of a mating connector and the part number of an alternate source for the mating connector For HP part numbers of the externally mounted con nectors themselves refer to Section VI Replace able Parts of this manual Model 8350A 2 28 Cables 1 Interface Connector and 2 29 The HP IB Interface Connector J4 located on the rear panel of the Model 8350A allows the sweep oscillator to be connected to any other device on the HP IB Interface Bus A complete illustra tion of pin configuration and signals on the HP IB Interface connector is given in Figure 2 5 2 30 All instruments on the HP IB Interface Bus are interconnected by HP IB Interface Cables A list of the available HP IB Interface Cables and their part numbers is given in Figure 2 6 As many as 15 instruments can be connected in parallel on the HP IB Interface Bus
49. localstate by either turning the LINE switch off on or by programming the Local Message 3 54 8350A Address Assignment Information 3 55 The 8350A has a primary address that 1s determined by an internal storage register The register is initialized upon power turn on by reading the address bits A5 through A1 from switches located on the 8350A HP IB Assembly Note that these switches are factory preset to decimal 19 Listen address of 3 Talk address of S The 8350A HP IB address be dynami cally changed from the front panel 1n local mode by executing the Set HP IB Address function Shift Local The present 8350A HP IB address can be found by pressing the SHIFT followed by the LCL key I5 Operating Information 3 56 The decimal equivalent of the talk listen address will be displayed in the FREQUENCY TIME display Refer to Table 3 5 for interpre tation ofthe equivalent decimal value into separate talk and listen address characters To change the address refer to Figure 3 7 Instrument State for further information 3 57 Receiving The Data Message 3 58 The 8350A accepts program codes that contain information for programming all of the front panel and special HP IB only functions except the LINE switch The 8350A will respond to the Data message when in remote and addressed to listen 3 59 Input Syntax The 8350A responds to program codes 1n a Data message in the order in which they are received Ea
50. lockout in effect the 8350A can be returned to local only by the controller or by turning the 8350A front panel LINE switch off on 3 85 Receiving The Clear Lockout Set Local Message 3 86 8350A responds to the Clear Lockout Set Local message in the same way as to the Local message Hence it returns to local front panel control The 8350A need not be addressed to listen to receive this message 3 87 Sending The Request Service Message 3 88 The 8350A sends a Request Service message RQS whenever one of the following conditions exist and if it has been preprogrammed 17 Operating Information Model 8350A Table 3 7 HP IB Program Codes Amplitude Marker On Off Alternate Sweep On Off Internal Leveling External Crystal Leveling External Power Meter Leveling Backspace Amplitude Crystal Marker On Off 83522 83525 Only Center Frequency Intensity Crystal Marker On Off 83522 83525 Only CW Frequency 1 MHz Crystal Marker Frequency 83522 83525 Only 10 MHz Crystal Marker Frequency 83522 83525 Only 50 MHz Crystal Marker Frequency 83522 83525 Only External Crystal Marker Frequency 83522 83525 Only Delta F Frequency Span dBm Step Down Decrement Display Blanking On Off Display Update On Off Exponent Power Of 10 Start Frequency Stop Frequency CW Filter In Out 20 MHz V FM 6 MHz V FM GHz Hz Input Learn String Instrument Preset Input Micro Learn String KHz Marker
51. of conditions is determined by a numeric value passed by the Request Mask function This numeric value is generated by summing the decimal values of each Status Byte bit to be checked This program demon strates the capability of the SRQ and Status Bytes to detect an error condition NOTE This assumes that the status bits are numbered 6 thru 7 with the least significant bit being number 0 Other references may assume that the bits are numbered 1 thru 8 with the least significant bit being number 1 If using an 86200 Series Plug in the Status Bytes can provide only limited information Table 1 indicates which Status Byte function bits are usable Table 1 8350A Status Byte Descriptions BIT DECIMAL VALUE REQUEST 4 TATUS BYTE 1 EXTENDED STATUS BYTE 42 Unleveled Failure Power is a Bit Functions not usable with 86200 Series Plug ins and 11869A Adapter 10 PROGRAM 7 1 ii ir 7128 NE PROGRAM 7 EXPLANATION Line 0 Clear the status of the HP IB and the 8350A Preset the 8350A to a predefined instrument state and enable the square wave modulation Line 1 Indicate that if an interrupt from the 98034A HP IB Interface is received that program execution will branch to the interrupt service routine located atthe line labelled SRQ Line 2 Enable the controllerto acceptan interrupt from the 980344 if bit 7 decimal value 128 is set Line 3 The 9825 displa
52. power cord which grounds the instrument cabinet This power cord should only be inserted in a socket outlet provided with a protective earth contact This protective action should not be negated by the use of an extension cord power cable without a protective con ductor ground Grounding one conduc tor of a two conductor outlet is not suf ficient protection 2 12 The offset pin of the three prong connector is the grounding pin When operating the Model 8350A from a two contact outlet the protective grounding feature may be preserved by using a three prong to two prong adapter USA connec tors only HP Part Number 1251 0048 and connecting the green wire of the adapter to ground SELECTION OF OPERATING VOLTAGE SLIDE OPEN POWER MODULE COVER DOOR AND PULL FUSE PULL LEVER TO LEFT TO REMOVE FUSE PULL OUT VOLTAGE SELECTOR PC BOARD POSITION PC BOARD SO THAT VOLTAGE NEAREST ACTUAL LINE VOLTAGE LEVEL WILL APPEAR IN MODULE WINDOW PUSH BOARD BACK INTO ITS SLOT 3 PUSH FUSE PULL LEVER INTO ITS NORMAL RIGHT HAND POSITION 4 CHECK FUSE TO MAKE SURE IT 1 OF COR RATING AND TYPE INPUT AC LINE VOLTAGE FUSE RATINGS FOR DIF FERENT LINE VOLTAGES ARE INDICATED BELOW POWER MODULE 5 INSERT CORRECT FUSE IN FUSEHOLDER Figure 2 1 Power Line Module 2 2 Model 8350A Installation Table 2 2 AC Power Cables Available Plug Cable Cable Description oed Color Straight BS1363A Mint Gray 90 Mint Gray
53. printer The program jumps backto step 2 above When inputting the CW frequency try several values each with a different number of digits after the decimal point Notice that the 8350A displays the frequency to 3 decimal places 1 MHz fre quency resolution Values with better than 1 MHz frequency resolution are rounded to the nearest MHz by the 8350A However the 85A outputs data in a free field format that outputs a number with all appropriate significant digits Another approach is to utilize the image statement to set the desired number of decimal places To use the image statement in the program perform the following on the 85 Press PAUSE SHIFT CLEAR Type DELETE 80 90 Press END LINE This should delete lines 80 and 90 from program 2 and allowthe use of lines 100 110 and 120 instead Run the modified program again and use the same steps for operation as before Now if the value inputted has a frequency resolution greater than 1 MHz the 85A does the rounding instead of the 8350A This is the preferred programming approach Change the image statement for 10 MHz frequency resolution and verify the results from the 8350A frequency display Since a device select code address can be a variable verify that this can be used in the modified or original program 2 by doing the following 1 Insert before line 10 line with the variable S by Press Type 5 5 719 Press 3 EXAMPLE PROGRAM 3 Se
54. set 60 Line Enable the controller to accept an inter rupt from the 98034A Line 70 The 9835A displays CW Freq GHz input prompts for the desired CW frequency value in GHz Store it in the variable F 80 Line Set the CW frequency as determined by T 90 Wait 100 milliseconds to allow the 8350A to interrupt Line Line 100 Go to line 70 Line 110 Location ofthe interrupt service routine Read the Status Byte of the 8350A and store it in A Line 120 Line 130 Line 140 Line 150 Line 160 Line 170 Check bit 0 of the 8350A Status Byte for an Altered Parameter error Print on the CRT display Parameter Altered if one exists Check bit 5 of the 8350A Status Byte for a Syntax error Print on the CRT display Syntax Error if one exists Clear the 8350A Status Byte to enable another SRQ Re specify bit 7 of the 98034A to cause an interrupt Re enable interrupts from the 98034A Return from the interrupt service routine to the main program The equipment setup is the same as the previous example Reset the 9835A scratch the 9835A memory then type in the above program Run the program The 8350A will undergo an instrument preset and enable the square wave modulation The 98354 then displays CW Freq GHz 7 Answer this prompt by inputting the desired CW frequency in GHz then press CONTINUE Verify that the 8350A CW frequency has been properly pro grammed Try
55. should have a lazy T t in the LED display and the 8350A should undergo an internal self test The 8350A turn on self test consists of the red LED numeric displays being blanked and all yellow indi cator LED s on then the 8350A sweep controls are set to the instrument preset state Start Stop Sweep over the entire plug in frequency range fastest sweep time for plug in used typically 10 milli seconds and maximum leveled output power for the plug in If the 83504 fails the power up self test an error message will be displayed in the farleft LED display Check section 8 of the 8350A Operating and Service Manual for error message decoding To verify that the HP IB connections and interface are functional perform the following on the 9825 1 Press 2 Type 719 Verify that the REMote light on the 8350 15 lit If this fails verify that the 98034A select code switch is set to 7 the 8350A address switches are set to 19 and the interface cable is properly connected If the 9825 display indicates an error message it is possible that the above remote message was typed in incorrectly or the ROM s are not properly installed If the 9825 accepts the remote statement and the lazy T appears in the display but the 8350A REMote light does not turn on you could have a defective 98034A or 8350A Perform the operational checks as outlined in the respective Operatingand Service Manualsto find the defect
56. the least significant bit being number 0 Other references may assume that the bits are numbered 1 thru 8 with the least significant bit being number 1 10 aN eae cee T 2 NOOSE NUE ry If using an 86200 Series Plug in the Status Bytes can provide only limited information Table 1 indicates which Status Byte functions bits are usable 7 ci E BEDRTIO ws MIO EA idus pr x es EN 26 CLEAR 88 DUTPUT 719 PADI RM CST ot IS EFE H 47 rq 1 CONTROL MASK 7 128 00 005 S SNP OT Cu Fr TI GHz co Meade 288 1 ODUTPUT 7195 H2 s sn uM WAIT Jee pu e STATUS 719 rs P AMEN M Altered SEI THEN PRINT PROGRAM 7 10 20 30 EXPLANATION Clear the status of the 1 Clear the status of the 8350 Preset the 8350A toa predefined instru ment state enable the square wave modulation and set the Request Mask to enable Parameter Altered and Syntax Error SRQ s Line Line Line Line 40 indicate that if an interrupt from the 98034A HP IB Interface is received that program execution will branch to the interrupt service routine located at the line labelled Sra Line 50 Specify an interrupt from the 98034 if bit 7 decimal value 128 is set Table 1 8350A Status Byte Descriptions STATUS BYTE 1 FUNCTION Airflow d Failure 2D Power
57. the voltage out is equal to the percent of band except swept CW Vernier value can roll over if knob or step causes the vernier value to exceed the maximum value then the CW CF value is changed and the vernier value resetto0 MHz or appropriate value Figure 3 6 Frequency Sweep Mode 2 of 3 Model 8350A Model 8350A LOCAL FUNCTION PROCEDURES Start Frequency Stop Frequency Continuous Wave Swept CW Center Frequency Delta Frequency Data Forms Range and Resolution Activate Range See plug in Resolution 0 24 of band Range t 05 of plug in Vernier Resolution 0008 of band Values must end with terminator GHz or MHz REMOTE FUNCTION PROCEDURES REO Code Function START STOP d o Swept CW SHCW Center Frequency Deita Frequency OFFSET Frequency Offset SH VR 0 05 VERNIER Frequency Vernier Lue dd 1 Depends on plug in used 1KHz if 2 GHz in 83525 83522 Figure 3 6 Frequency Sweep Mode 3 of 3 Operating Information 23 Operating Information Model 8350A INSTRUMENT STATE DESCRIPTION This function block contains two LEDs one that indicates whether Sweep Oscillator is in the remote mode and another indictates when it is addressed to talk or listen The local key when not in local lockout will switch the Sweep Oscillator from remote to l
58. value Frequency values can be entered in GHz MHz kHz or Hz Sweep time values can be entered in Seconds or milliseconds Power values can be entered in dBm or dB If a units terminator is not passed the 8350A assumes the numeric value is in the fundamental units of Hz or Seconds 3 63 End Of String Message EOS This can be the ASCII character Line Feed LF decimal 10 the bus END command EOI and ATN true or another function code string NOTE The HP IB program code syntax typically mirrors that of the local front panel keystroke sequence 3 64 Valid Characters The alpha program codes can be either upper or lower case since the 8350A can accept either type Spaces unnecessary signs leading zeroes and carriage returns CR are ignored 3 65 Program Codes See Table 3 7 for the summary of input programming codes that are acceptible via the Data message 3 66 Sending The Data Message 3 67 The 8350A can send Data messages when in remote and addressed to talk The available output modes are Learn String Micro Learn String Mode String Interrogate Function Active Function Status Model 8350A 3 68 Each function is activated by the 8350A receiving a Data message with the appropriate function code refer to Table 3 7 The Learn String Micro Learn String Mode String and Status functions send a Data message consisting of a string of 8 bit binary bytes terminated using the bus END command EOI a
59. wave modulation Return the 8350 to local control then stops program execution Line 3 Program the 8350 to output the Learn String Line 4 Transfer the Learn String information into the 9825 data buffer specifying to transfer only 90 characters Line 5 Checkthe status of the buffer to determine if the transfer is complete If it is not then keep checking the buffer status Line 5 Extract the Learn String information from the buffer by removing the buffer pointers and re save only the Learn String in A Line 7 Stops program execution Line 8 Program the 8350A to accept a new Learn String then send the new Learn String to the 8350 Line 9 Stops program execution Set up the equipmentas in example 3 using the CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 9825 erase the 9825 memory then type in the above program Run the program The 8350A will undergo an instrument preset enablethe square wave modulation then return to local front panel control Then perform the following 1 Adjust the 8350A to a preferred instrument state then press CONTINUE on the 9825 2 Turnthe 8350A line power off Wait five seconds then turn the 8350A power back on Press PRESET on the 8350A 3 Press CONTINUE on the 9825 Verify on the CRT display and or the 8350A that the original instrum
60. when leveling output power with an HP 432A B C Power Meter CAL Adjusts the ALC gain so the display can be calibrated by an external power meter or detector CRYSTAL MARKERS 83522A 83525A Plug ins only 50 10 and MHz crystal frequency marker combs are available The 50 and 10 MHz are available at frequencies less than 2 GHz while the 1 MHz markers are available under 1 GHz AMPTD INTENS The markers can be set to be amplitude dips on the RF output and or intensified spots on the Z axis of the CRT or both They are independent of the mainframe markers EXT External Marker external frequency marker can be input through the rear panel of the plug in The marker appears when the RF output frequency equals the marker frequency The external marker input power should be between 10 dBm and 10 dBm MKR Lamp When the 8350A is in CW or manual external sweep mode the MKR Lamp will light when the CW frequency is at a marker frequency Useful when an accurate CW frequency reference is desired and to calibrate plug ins RF OUTPUT CONNECTOR Type N female The 83570A 18 to 26 5 GHz Plug in is equipped with a WR 42 waveguide output connector Figure 7 Plug in Controls 2 of 2 Model 8350A Model 8350 Local Operation Figure 8 Frequency Response Test Set INTERFACING THE 8350A WITH SPECIFIC MEASUREMENT EQUIPMENT 87558 FREQUENCY RESPONSE TEST SET The 8755S consist of 8755C Swept Amplitude Analyzer 182T
61. 0 0009007090000027 0000 OOOO CIOOOOOODODOCMO Oooo Se LET eee FIGURE 1 System Connection SET UP Figure 1 shows the system connection and switch settings for the 82937A HP IB Interface and the 85A Personal Computer The following procedure completes the setup 1 Turn off the power to the 85A 2 Verify that the ROM is installed in the 85 If not then install the ROM in the 82936A ROM Drawer then insert the drawer in one of the rear panel slots of the 85 3 Install the 82937A HP 1B Interface Card into one of the rear panel slots of the 85 4 Connect the 24 pin HP IB connector of the 82937A to the rear panel HP IB connector of the 8350A This connector is tapered to insure proper connection CAUTION Do not attempt to mate black metric threaded screws on one connector with silver English threaded nuts on another connector or vice versa as damage may result A metric conversion kit which will convert one cable and one or two instruments to metric hardware is available by ordering HP Part No 5060 0138 5 Allprograms within this guide expect the 8350A HP IB address to be decimal 19 The 8350A HP IB address switches are located inside the instrument and are factory preset to decimal 19 To find the present HP IB address use the front panel Set HP IB Address by executing The FREQUENCY TIME display will indicate the present decimal address To reset th
62. 0 Puts the 8350A into a predefined state via instrument preset Line 20 Puts the 8350A in CW mode and pro grams a CW frequency of 7 555 GHz Line 30 The 85 displays CW 7 555 GHz Line 40 Temporarily stops program execution Line 50 The 85 displays CW in GHz Line 60 The user is prompted to input a new CW frequency value which is stored in the variable F Line 70 Printon the CRT display the programmed CW frequency Line 80 Program the CW frequency using the default data format Programming Functions E TPA TONOA AON GME 10 22 are reb t MI POM MONEE SEN HSER EOIN ADMD NOMAS DS SL Line 90 Go to line 50 Line 100 Image statement is set up for program ming the CW frequency with a 1 MHz resolution Line 110 Program the CW frequency via image statement in line 100 Line 120 Go to line 50 The equipment setup is the same as the previous example Reset the 85A scratch the 85A memory then type in the above program Then perform the following 1 Clearthe 85ACRT display then run the program The 85A displays CW 7 555 GHz The 8350A changes from the instrument preset state of Start Stop sweep to a CW frequency of 7 555 GHz 2 Press CONF on the 85 The 85A now displays CW in GHz Type ina new CW frequency value in GHz then press END LINE 3 The 8350A will be programmed to the new CW frequency with the new value printed on the internal
63. 00000000 00000001 00000010 00000011 00000100 6 00000000 0 REFERENCE MAKRER 00000001 00000010 2 00000011 3 4 00000100 MARKERS On Off 0 000 1 M2 000 1 M3 000 1 M MS COUNTER TRIGGER PARAMETER 00000000 Start Freq 0000000 1 Stop Freq 000000 10 Marker Freq SPECIAL CONDITIONS Non Swept CW On Off Onz1 Off 0 Default Step Size On Off Vernier Negative Yes No Yes 1 No Q Offset Negative Yes No Mkr A Mode On Off Mkr Sweep Mode On Off Counter Trigger On Off Alt Sweep On Off KEYBOARD ASSIGNMENT 10 00000000 0 Start 00000001 Stop 00000010 2 CW CF 00000011 3 AF 00000100 4 Vernier 00000101 5 Offset 00000110 6 Markers Figure 3 17 Only Functions 6 of 7 Model 8350A Operating Information MODE STRING 2 of 2 B Bit U xim C NENNEN ___ 10 d 00000111 Step Size 00001000 Sweep Time 00001001 Manual Sweep 00001010 Save Recall Alt 00001011 Hex Entry Address 00001100 ns Entry Data 00001101 ey Test 00001110 Address 01111111 01000000 Power Level 01000001 Power Sweep 01000010 Slope 00000000 ALTERNATE REGISTER 00000001 00000010 00000011 00000100 00000101 00000110 00000111 00001000 00001001 00000000 13 00000000 00000001 00000010 Mode Int Ext Mtr POWER CONTROL
64. 0A Status Byte for an Altered Parameter error Print on the internal printer Parameter Altered if one exists Line 140 Check bit 5 of the 8350A Status Byte fora Syntax Error Print on the internal printer Syntax Error if one exists Line 150 Clear the status of the 83504 Line 160 Re specify and re enable bit 3 of the 829374 to cause an interrupt Line 170 Return from the interrupt service routine to the main program The equipment setup is the same as the previous example Reset the 85A scratch the 85 memory then type in the above program Clear the 85A CRT display then run the program The 8350A will undergo an instrument preset and enable the square wave modulation The 85A then displays CW Freg GHz Answer this prompt by inputting the desired CW frequency in GHz then press END Verify that the 8350A CW frequency has been properly programmed Try several values that are out of range of the plug in s frequency limits and verify that an error message was printed on the internal printer The program repeats the above input prompt To stop the program press PAUSE t NOTE For Program 7 to function properly change line 30 to 30 OUTPUT 719 IPMD1RM amp CHR 97 This change enables bit 5 SRQ on Syntax Error and bit 0 SRQ on Numeric Parameter to Default Value PROGRAM CODES CODE DESCRIPTION CODE DESCRIPTION Amplitude Marker On Off AKM MZ MHZ ALmn Alternate Sweep On Off MO Mar
65. 0A to local control Line 50 Temporarily stops program execution Line 60 Program the 8350A to output the Learn String Line 70 Read the Learn String into the 9835A using a byte fast handshake transfer of 90 string characters ignoring the line feed as the string terminator Store the 90 character Learn String in A Line 80 Temporarily stops program execution Line 90 Program the 8350A to accept a Learn String then send the new Learn String to the 8350A Line 100 Stop program execution Setup the equipment as in example 3 using the CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 98354 scratch the 9835A memory then type in the above program Run the program The 8350A will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following 1 Adjust the 8350A to a preferred instrument state then press CONTINUE on the 9835A EX AMPLE PROGRAM 5 int terrogatin While the 8350A Learn String enables the user to completely save a string of characters that define the present instrument state the information is densely packed and encoded to save memory space If the user wishes to determine the actual value of a specific parameter say the Start Fre quency it would require atedious processto extract a numeric value from several charac
66. 1250 0256 Specialty Connector 25 P118 1 J11 FM INPUT BNC 1250 0256 Specialty Connector 25 118 1 J12 AM INPUT BNC 1250 0256 Specialty Connector 25 P118 1 J13 PROGRAMMING 25 Pin D Series 1251 0063 ITT Cannon CONNECTOR DBM 25P Ji4 ALT SWP Audio 3 Pin Connector no HP Part Number Switchcraft INTERFACE TA 3F Refer to Figure 2 6 for HP IB Interface Cable information HP IB Interface connector J4 signals and pin configuration are given in Figure 2 5 A 1219 mm 48 cable assembly with a Switchcraft TA 3F Audio 3 Pin connector on each end is supplied with the Model 8755C Swept Amplitude Analyzer as the Alternate Sweep Interface Cable The complete cable may be ordered separately as HP Part Number 8120 3174 2 9 Installation 2 31 Programming Connector 2 32 The Programming Connector J13 on the rear panel of the Model 8350A provides digital control of display functions and sweep oscillator Step Up control Figure 2 7 gives a description of all pins and signals available on the Programming Connector When the Model 8410B 8411A Net work Analyzer is used with the Model 8350A the Model 8410B Source Control Cable HP Part Number 08410 60146 connects the Model 8410B rear panel SOURCE CONTROL and the Model 8350A rear panel PROGRAMMING CON NECTOR Additionally the sweep oscillator RF plugin 1V GHz output connects to the Model 8410B rear panel FREQ REF INPUT to insure that the Model 8410B phase locks with the sweep osc
67. 50 will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following 1 Adjustthe 8350A toa preferred instrument state using the Start Frequency Stop Frequency and Sweep Time controls EXAMPLE PROG RAM 6 Stepped CW Sweep IEEE E EE Eo Present automatic measurement systems typically make measurements at a sequence of CW test frequencies instead of analog sweeping the fre quency range of interest If swept the measurement data taking machine would need to sample the RF signal at a very fast rate to maintain accurate fre quency information too This is typically not accom plished Stepped CW sweeps can be accomplished in several ways with the 83 50 1 Program sequential CW test frequencies 2 Program the requency sweep range then enable the manual sweep mode Perform a stepped manual sweep by repetitively program ming the step up increment function 3 Program the CW frequency to the start fre quency the Step Size to an appropriate value then repetitively program the step up incre ment function Considering the speed of programming the above approaches the third is the most efficient time wise This program illustrates a stepped sweep using this approach PROGRAM 6 PROGRAM 6 EXPLANATION Line 10 Setthe 8350A to a predefined instrument state and enable the square wave modulation Line 20 The 85 di
68. 525A only ALL OTHER FUNCTIONS off Figure 1 Instrument Preset Key 2 of 2 Local Operation Model 8350A DATA ENTRY This section contains the numeric keyboard terminators i e GHz seconds dBm step size up down backspace and shift keys In addition to using the appropriate control a function value can be set to an exact value or incremented by a specific amount via the keyboard Number unit keys These keys are used to enter values of frequency time or power Holding a number key down causes it to repeat Example To enter a START frequency of 1 870 GHz to enter the equivalent frequency in MHz Backspace Key BK SP Prior to pressing a units key the value entered from the keyboard may be changed via the BK SP key without effecting the current instrument state The backspace key allows the user to alter digits already entered Step UP and Step DOWN keys These keys increment or decrement the active parameter including memory registers by the STEP SIZE or preset amount By holding either key down the 8350A will continue to step Figure 2 Data Entry 1 of 2 Model 8350A Local Operation therefore eliminating the need for the user to repeatedly press the step keys The STEP UP function may be engaged via the remote STEP UP ADVANCE on the rear panel Programming Connector The STEP UP ADVANCE is incremented by supplying contactclosure to ground or logical 0 to pin 22 STEP
69. 55 1500 Western 213 970 7500 Canadian 416 678 9430 Ask the operator for instrument sales Or write Hewlett Packard 1501 Page Mill Road Palo Alto CA 94304 in Europe Hewlett Packard S A 7 rue du Bois du Lan P O Box CH 1217 Meyrin 2 Geneva Switzerland In Japan Yokogawa Hewlett Packard Ltd 29 21 Takaido Higashi 3 chome Suginami ku Tokyo 168 5952 9307 Printed in U S A 8350A 85 1 Supersedes None Introductory Operating Guide for the HP 8350A Sweep Oscillator with the HP 85A Personal Computer INTRODUCTION This programming note is a guide to the remote operation of the HP 8350A Sweep Oscillator and appropriate HP 83500 Series Plug in using the HP 85A Personal Computer Included in this guide are the system connections for remote operation and several example programs with descriptions of each step The 83504 is fully compatible with the Hewlett Packard Interface Bus 18 When used with a controller such as the 85A complete control of the sweep mode frequency limits frequency markers power level and all otherfront panel controls can be achieved REFERENCE INFORMATION For further information on the HP Interface Bus the O HEWLETT PACKARD CO 1980 following references should prove helpful Condensed Description of the Hewlett Packard Interface Bus HP Literature No 59401 90030 Complete reference information on the 8350A can be found in the 8350A Sweep Oscillator Operat
70. 8192 points across band 0 001596 of full band for 1 64 band or less 16 384 points across band Display Resolution 5 digits maximum CW Operation Single frequency RF output When changing between CF AF and CW mode the CW frequency and the Center Frequency CF are equivalent 1 2 CW Accuracy Refer to RF plug in unit specifi cations CW Resolution Same as CF Vernier Adjusts CW frequency of swept range up to 0 05 of RF plug in band being swept The vernier adds its value to the appropriate fre quency parameter and then resets to zero when the adjustment exceeds 0 05 for continuous adjustment The 0 LED is on whenever vernier adjustment value is present Vernier Resolution 4 ppm 64 points between each CW point 262 144 points across band Offset Allows the CW frequency or center frequency of swept range to be offset by any amount up to the full range of the RF plug in After entering an offset and returning the displays to the previous mode the 0 LED will be on indicating thatan offset is present however the display will remain unchanged Resolution Same as CF Accuracy Refer to RF plug in unit specifi cations Frequency Markers Five frequency markers are independently adjustable and fully calibrated over the entire sweep range Front panel key provides for the selection of either amplitude or intensity markers Resolution 0 4 of selected sweep width 250 points sweep
71. 82104 String Advanced Programming ROM b HP 98213A or 98214 or 98216A General O Extended ROM HP INTERFACE BUS 8350A 83500 PLUG IN HP 98034A HP IB Interface Card Cable NOTE The following equipment is not required for the programs to function but rather for a visual display of the 8350A functions 87555 Frequency Response Test Set with a HP 8755C Swept Amplitude Analyzer b HP 180TR or 182T Display Unit 11664A or 11664B Detector d Two120 cm BNC cables HP 11170C variety or any appropriate oscilloscope with Detector Crystal Schottky Attenuatorand BNC cabling Any test device over the frequency range of the 83500 Series Plug in 98034A Gd 0000 DODUN 7000 aagao AMAA 100 goag 6006900 C iir 06006660606 i l 38213 or 38210A 98214A or 98216A 9825A only Figure 1 System Connection SET UP Figure 1 shows the system connection and switch settings for the 98034A Interface and the 9825 Desktop Computer The following procedure com pletes the setup 1 Turn off the power to the 9825 2 Forthe 9825 Desktop Computer verify that the ROMS s are installed If using a 9825 then check the front panel slots If using the 9825B these ROM s are internal and and may have been disabled by an internal switch 3 Installthe 98034A Interface Card into one ofthe rear panel slots of the 9825 4 Verify that the rot
72. 8350A Installation INSTALLATION INSTRUCTIONS 1 REMOVE SIDE TRIM STRIPS 2 ATTACH FRONT HANDLE ASSEMBLY 2 WITH THREE 8 32 x 3 8 SCREWS 3 PER SIDE 3 PRESS FRONT HANDLE TRIM 4 IN PLACE OPTION 807 HP Part No 5060 0089 CONTENTS EU HP Part No EB Description 5060 9899 Front Handle Assembly E 2510 0195 38 32 x 3 8 Screw 4 2 5020 8896 Front Handle Trim Figure 2 9 Option 907 Front Handles Kit 2 13 Installation Model 8350A INSTALLATION INSTRUCTIONS 1 REMOVE SIDE TRIM STRIPS 2 ATTACH RACK MOUNT FLANGE 2 WITH 8 32 x 3 8 SCREWS 3 3 REMOVE FEET AND TILT STANDS 4 BEFORE RACK MOUNTING THIS ALSO REMOVES IN FORMATION CARD TRAY G TO RETAIN USE OF INFORMATION CARDS DO NOT REMOVE FEET AND WHEN RACK MOUNTING ALLOW APPROXIMATELY 2CM 3 4 INCH BELOW IN STRUMENT TO ACCOMODATE THE TRAY NO FILLER STRIP IS PROVIDED OPTION 908 HP Part No 5061 0077 CONTENTS 2 2 5020 8862 7 Rack Mount Flange 3 6 2510 0913 9 8 32 x 3 8 Screw Figure 2 10 Option 908 Rack Mount Kit 2 14 Model 8350 Installation INSTALLATION INSTRUCTIONS 1 REMOVE SIDE TRIM STRIPS D 2 ATTACH RACK MOUNT FLANGE AND FRONT HANDLE ASSEMBLY 3 WITH THREE 8 32 x 5 8 SCREWS 4 PER SIDE 3 REMOVE FEET AND STANDS 5 BEFORE RACK MOUNTING THIS ALSO REMOVES INFORMATION CARD TRAY TO RETAIN USE OF INFORMATION CARDS DO NOT RE MOVE FEET AND WHEN RACK MOUNTING ALLOW APPROXIMATELY 2C
73. 8350A SWEEP OSCILLATOR Including Options 001 and 400 SERIAL NUMBERS This manual applies directly to HP Model 8350A Sweep Oscillator having serial number prefix 2024A With changes described in Section this manual also applies to instruments with serial numbers prefixed 2007A and 2019A For additional information about serial numbers refer to INSTRUMENTS COVERED BY MANUAL in Section I Copyright HEWLETT PACKARD COMPANY 1980 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA 95404 U S A MANUAL PART NO 08350 90001 MICROFICHE PART NO 08350 90002 Printed JANUARY 1981 packar CERTIFICATION Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Hewlett Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Com pany will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP Buyer shall prepay shipping char
74. 9302 Printed in U S A 8350 9835 1 Supersedes None OCTOBER 1980 Introductory Operating Guide for the HP 8350A Sweep Oscillator with the HP 9835A Desktop Computer INTRODUCTION This programming note is a guide to the remote operation of the HP 8350A Sweep Oscillator and appropriate HP 83500 Series Plug in using the HP 9835A Desktop Computer Included in this guide are the system connections for remote operation and several example programs with descriptions of each step The 8350A is fully compatibile with the Hewlett Packard Interface Bus HP 1B When used with controller such as the 9835A complete control of the sweep mode frequency limits frequency markers power level and all other front panel controls can be achieved REFERENCE INFORMATION For further information on the HP Interface Bus the following reference should prove helpful Condensed Description of the Hewlett Packard Interface Bus HP Literature No 59401 90030 msan OHEWLETT PACKARD 1980 Complete reference information on the 8350A can be found in the 8350A Sweep Oscillator Operating and Service Manual HP Part No 08350 90001 For information on operating the 9835A the following references are available 9835A Operatingand Programming Manual HP Part No 09835 90000 9835A1 O ROM Programming Manual HP Part No 09835 90060 EQUIPMENT REQUIRED To perform all the exampl
75. ACQ TIME switch to MED or FAST 8350A Select the frequency parameter to be measured by pressing the appropriate key START STOP or any marker Mn where n 1 5 and then press SHIFT M2 If the sweep setting is changed or it is desired to exit this mode disable the 5343A by pressing SHIFT M3 on the 8350A front panel Example To measure the START frequency 1 Connect equipment as shown in Figure 15 Set the 5343 to AUTO SWP M and set desired frequency resolution Press the 8350A PRESET M2 keys The 5343A will temporarily stop s me splay at the desired resolution Local Operation Local Operation Model 8350A APPENDIX 1 REAR PANEL CONNECTIONS For a diagram of the rear panel see Figure 16 POS Z BLANK Positive Z axis blanking signal Supplies a rectangular pulse of approximately 5V into 2500 ohms during the retrace and bandswitch points of the RF output Also supplies a 5V 8 volts for active marker pulse when the RF is coincident with a marker frequency if intensity markers are selected NEG Z BLANK Negative Z axis blanking signal Supplies a negative rectangular pulse 5V into 2500 ohms during the retrace and bandswitch points of the RF output PEN LIFT Output to control the pen lift function of an X Y recorder Maximum pen up level is 40V and maximum pen down sink current is 500 mA at 4 0 7V SWEEP OUT IN Wired in parallel with sweep out in BNC connector on front panel See
76. CTION 1 2 This Operating and Service Manual con tains information required to install operate test adjust and service the Hewlett Packard Model 8350A Sweep Oscillator Figure 1 1 shows the Model 8350A and power cable 1 3 This manual is divided into eight major sections which provide the following information a SECTION I GENERAL INFORMATION includes a brief description of the instru ment safety considerations specifications supplemental characteristics instrument identification options available accessories available and a list of recommended test equipment b SECTION IL INSTALLATION provides information for initial inspection prepar ation for use battery information rack mounting storage and shipment c SECTION OPERATION consists of three subsections which contain general operating information local operation infor mation non HP IB and remote operation information Programming Notes which provide information on HP IB use of the Model 8350 4 SECTION IV PERFORMANCE TESTS presents procedures required to verify that performance of the instrument is in accord ance with published specifications Per formance Tests which are general to most RF plug in units are given in the section Per formance Test limits and other special tests related to specific RF plug ins are supplied in each RF plug in Operating and Service Manual Included is a Local and Remote Operation Verification procedure
77. Clear the 85A CRT display then run the program The 8350A will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following 1 Adjust the 8350 to a preferred instrument state then press CONT on the 85 2 Tumthe 8350 line power off Wait five seconds then turn the 8350A power back on Press INSTR PRESET on the 8350A 3 Press CONT on the 85A Verify on the analyzers CRT display and or the 8350A that the original instrument state has been restored EXAMPLE PROGRAM 5 Interrogating The Present Value Of A Function While the 8350 Learn String enables the user to completely save a string of characters that define the present instrument state the information is densely packed and encoded to save memory space If the user wishes to determine the actual value of a specific parameter say the Start Frequency it would require a tedious process to extract anumeric value from several characters within the Learn String An easier approach is to use the Output Interrogated Parameter function of the 8350A With this function the 85 instructs the 8350A to output the present numeric value of a specified function Any function that has a numeric value associated with it except Step Size can be interrogated Note that if the parameter is not presently active the 8350A uses a computed value or its previous value The following program demonstrates the capabil
78. DE EXAMPLE PROG Being able to save a specific instrument state is helpful when it is needed several times in a test or measurement procedure The user could save the instrument state by manually logging the important sweep parameters such as frequency range power level ALC modes etc then re inputting them at the appropriate time A somewhat simpler approach is to save the instrument state in one of the 8350A internal storage registers then recall it when needed However this is not a permanent solution unless the 8350A Non volatile Memory option Option 001 is used A more permanent solution is to use the Output Learn String function of the 8350A so that the 9835A can learn then store a data string that describes the present instrument state on a tape cartridge or in its internal memory Once an instrument state is stored or learned the 8350A can then be restored to that state using the Input Learn String function The power of these instrument Learn Teach functions are demonstrated by the following program using the 9835A fast data transfer function PROGRAM 4 g An instrumen DEVICE UNDER TEST URN DETECTOR PROGRAM 4 EXPLANATION Line 10 Define the first element in any array to be at index number 1 Line 20 Set the length of the A string to 100 characters Line 30 Setthe 8350A to a predefined state via instrument preset and enable the square wave modulation Line 40 Return the 835
79. E REMOTE FUNCTION PROCEDURE Program BE Function Frequency Step Size See Plug in Frequency Limits Power STEP Step Up INCREMENT 4 STEP ox E BUTTON T BACKSPACE SPACE Back Default Reset to derat Figure 3 11 Data Entry Step Keys Keyboard 2 of 2 STEP SIZE 35 Operating Information Model 8350A Modulation Blanking DESCRIPTION This function block controls the frequency marker display mode RF power and external CRT control Mainframe frequency markers can be RF amplitude dips or CRT intensity dots via Z axis control The RF powercan be turned off during the retrace sweep The CRT display retrace sweep can be blanked The internal squarewave amplitude modulation can be enabled The squarewave frequency is 27 8 KHz standard for proper operation with the HP 8755 Frequency Response Test Set or internally selectable see Section IV for 1 KHz for proper operation with the HP 415 SWR Meter and other instruments The sweep input output connector is also in this block PANEL LAYOUT AMPTD DISPEL RF MKR BLANK BLANK ee SWEEP OUTPUT O BOO ON OFF SWEEP INPUT FUNCTIONS INDICATORS AMPLITUDE MARKER This function when engaged light on sets the mainframe frequency markers into RF amplitude dips instead of CRT intensity dots via Z axis control DISPLAY BLANKING This function when engaged light on blanks the retrace sweep on CRT displays via Z axi
80. F off or on The CW Filter when enabled reduces the oscillator tuning voltage noise and hence Residual FM The CW Filter is inactive sweep modes PANEL LAYOUT RF CW FILTER NE FUNCTIONS INDICATORS RF ON OFF This function switches RF power on light on or off gt 30dB attenuation CW FILTER ON OFF This function enables light on or disables the oscillator tune voltage filter when in CW or manual sweep modes only LIMITATIONS CONCERNS l CW filter not enabled during sweeps LOCAL FUNCTION PROCEDURE Data F Function Activate Ores Range and On Off Knob Step Resolution LLL TTT REMOTE FUNCTION PROCEDURE Program Code Mode Function RE Power On RFI Power Off RFO I Filter On FH Filter Off Figure 3 14 Signal Control 83500 series plug ins 8350 Operating Information ALC MODE DESCRIPTION This functional block controls all Automatic Leveling Control ALC functions of the output power Several modes of ALC can be selected these are Internal External via a Crystal Detector or external via a Power Meter PANEL LAYOUT MODE 9 eJ OUTPUT CAL A EXT MTR ALC FUNCTIONS INDICATORS INTERNAL ALC This selects the internal crystal detector coupler for leveling the output power at the front panel output connector EXTERNAL ALC This selects the external crystal detector for leveling with the detector output ap
81. Hz RHG Electronics Part No DM 1 18 None RHG Electronics Laboratories Inc Deer Park NY 11729 Adapter SMA Male to SMA Male 1250 1159 Figure 1 3 Delay Line Discriminator 1 15 1 16 Model 8350 Installation SECTION INSTALLATION 2 1 INTRODUCTION 2 2 This section provides installation instruc tions for the Model 8350A Sweep Oscillator and its acccessories This section also includes infor mation about initial inspection and damage claims preparation for use and packaging storage and shipment 2 3 INITIAL INSPECTION 2 4 Inspect the shipping container for damage Ifthe shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechani cally and electrically The contents of the ship ment should be as shown in Figure 1 1 Pro cedures for checking electrical performance are given in Section IV Performance Tests of this manual If the instrument combination does not pass the electrical Performance Tests refer to Section V Adjustments of this manual If after the adjustments have been made the instrument combination still fails to meet specifications refer to Section V Adjustments of the Operating and Service Manual for the RF plug in being used Ifa circuit malfunction is suspected refer to trouble shooting procedures in Section Service of this or the RF pl
82. L OFF MKRA Marker m Marker n kr A Turn Off Mkr A MKRA OFF Active Marker to Center Frequency CF MARKER SWEEP Marker 1 2 Sweep MARKER SWEEP Marker 1 to Start M1 ST SHMP M2 SP SWEEP TRIGGER TYPE 3 Turn On and Set M Marker 2 to Stop Table 1 Input Programming Codes 2 of 4 PROGRAM CODE NUMERIC VALUE MODE FUNCTION PREFIX NUMERIC SCALE ACTIVATE FORMAT SUFFIX FACTOR RANGE RESOLUTION SWEEP TRIGGER TYPE Cont d EXTERNAL SWEEP SX Present MANUAL Start 0 1 of Sweep SWEEP SM 1 2 3 4 Stop Present Type FREQUENCY KZ Frequency AF 1 See Plug in Typically 01 to 100 sec ST 1 2 3 4 MS MODULATION BLANKING 0 001 sec AMPTD MKR ON AMPTD MKR OFF Amplitude Frequency Markers DISP BLANK ON DP1 Display Blanking DISP BLANK OFF 028 RF BLANK ON RP1 RF Blanking RF BLANK OFF RP Square Wave E C Modulation LI MOD OFF MD1 xi0 Hz x108Hz x103Hz N zx Approxi 9 to 100 mately 0 03 Setting Frequency FREQUENCY 2 Step Size STEP SIZE of Plug in Bandwidth zE 2 1 Hz Setting Power Step POWER STEP IZE P 1 2 3 4 DM wu d on Resetting Step Sizes DEFAULT STEP To Default Values SIZE 5 55 increment Active Parameter STEP UP Decrement Active Saving An Instrument State SAVE n
83. M 3 4 INCH BELOW INSTRUMENT TO ACCOMODATE THE TRAY NO FILLER STRIP IS PROVIDED OPTION 909 HP Part No 5061 0083 CONTENTS 2 1 2 5020 8874 Rack Mount Flange 3 2 5060 9899 6 Front Handle Assembly 4 6 2510 0194 8 18 32 x 5 8 Screw Figure 2 11 Option 909 Rack Mount Kit with Handles 2 15 Installation Model 8350A 2 PLACES 00 2 PLACES HP Part No Deseription 1 8 9220 2733 7 FOAM PADS TOP CORNERS BOTTOM CORNERS 2 1 9211 3462 2 CARTON INNER 3 2 4040 1738 3 BARS SHIPPING NYLON 4 4 2510 0103 9 SCREW FOR ATTACHING SHIPPING BARS 5 1 9211 3463 3 OUTER 6 2 9220 3365 3 SIDE PADS CORRUGATED CARDBOARD 7 1 9220 2950 0 SLEEVE MANUAL PROTECTION 8 i 9222 0484 5 POLY BAG TO COVER INSTRUMENT NOT SHOWN Figure 2 12 Packaging for Shipment using Factory Packaging Materials 2 16 Model 8350 Installation 1 REMOVE RACK MOUNT FLANGE 3 AND OR FRONT HANDLE ASSEMBLY 00 2 ATTACH SHIPPING BARS WITH TWO 8 32 3 8 SCREWS Refer to Figure 2 12 for Part Numbers of Shipping Bars and Screws Figure 2 13 Preparation of Instrument for Shipment 2 17 Installation Rack Mount Kit with Front Handles a combi nation of the Option 907 Kit and the Option 908 Kit This kit supplies the necessary hardware and installation instructions for preparing the instru ment to mount on equipment rack with 482 6 mm 19 in support spacing with the
84. M CW Filter In Out SP 20 MHz V FM 55 6 MHz V FM ST GHz SX Hz TS Input Learn String T1 Instrument Preset T2 Input Micro Learn String T3 kHz 4 Marker Center Frequency UP Square Wave Amplitude Modula VR tion On Off Marker Off 0 9 NOTES Program codes of the form XXm use m to turn the function On or 1 or 0 For the storage register functions the n is 1 through 9 Marker 1 2 Sweep On Off Milliseconds MHz Marker Off Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 Network Analyzer Trigger 8410B Output Active Parameter Output Learn String Output Mode String Output interrogated Parameter Output Status Bytes Output Micro Learn String Power Level Power Sweep On Off Recall Register RF Power On Off Service Request Mask RF Blanking On Off Reset Sweep Seconds Frequency Step Size Shift Function Slope On Off Manual Sweep Power Step Size Step Size Sweep Time Save Register external Sweep Take Sweep Internal Sweep Trigger Line Sweep Trigger External Sweep Trigger Single Sweep Step Up Increment CW Vernier Acceptable Numeric Data The 8350A ignores spaces plus signs negative signs except when valid and any unexpected characters Program codes can be upper or lower case alpha characters For more information call your local HP Sales Office or nearest Regional Office Eastern 201 265 5000 Midwestern 312 255 9800 Southern 404 9
85. NECTION OPEN COLLECTOR OUTPUT Figure 2 7 Programming Connector Signals and Pin Configuration 2 11 Installation 2 42 Front Handles Option 907 CAUTION When installing front handles and rack mount kits insure that the correct screws specified in the installation figures in this section of the manuali are used Use of a screw which is longer than the specified length may result in damage to internal components located behind the screw mounting holes in the instrument 2 43 Instruments with Option 907 contain a Front Handle Kit This kit supplies the necessary hardware and installation instructions for mount ing two front handles on the instrument Instal lation instructions are also given in Figure 2 9 Keep this area clear Model 8350A Additional Option 907 Kits may be ordered as HP Part Number 5061 0089 2 44 Rack Mounting Option 908 2 45 Instruments with Option 908 contain a Rack Mount Kit This kit supplies the necessary hardware and installation instructions for prepar ing the instrument to mount on an equipment rack with 482 6 mm 19 in support spacing In stallation instructions are also given in Figure 2 10 Additional Option 908 Kits may be ordered as HP Part Number 5061 0077 2 46 Rack Mounting with Front Handles Option 909 2 47 Instruments with Option 909 contain a Keep this area clear Figure 2 8 Model 8350A Ventilation Clearances and Airflow 2 12 Model
86. Part Number 08350 60013 This Option 001 Battery Kit contains a battery pack a battery pack hold down clamp and a special A3 Microprocessor board other necessary wiring and hardware con nections have been made at the factory on all standard instruments Refer to Section VI Re placeable Parts in this manual for information and part numbers required to order individual battery packs 2 50 STORAGE AND SHIPMENT 2 51 Environment 2 52 The instrument may be stored or shipped in environments within the following limits 2 18 Model 8350A 40 C to 75 Humidity 596 to 9596 relative at 0 to 40 Altitude Up to 15240 meters approximately 50 000 feet 2 53 The instrument should also be protected from temperature extremes which may cause condensation in the instrument 2 54 Packaging 2 55 Original Packaging Containers and materials identical to those used in factory pack aging are available through Hewlett Packard offices A complete diagram and listing of pack aging materials used for the Model 8350A is shown in Figure 2 12 Prior to shipping in the factory packaging materials the shipping bars should replace the front handles or rack mount flanges as shown in Figure 2 13 to hold the instrument securely in the packaging material If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the type of service required retu
87. Prior to setting the HP IB address switch the LINE switch should be set to OFF and the power cord should be dis connected from the ac power source for maximum safety Capacitors inside the instrument may still be charged even when the instrument is disconnected from its ac power source Use caution when setting the HP IB address switch to avoid touching assemblies or compon ents within the instrument other than the HP IB address switch 2 14 When the Model 8350A is used under remote control with the HP IB the controller on the bus refers to the Model 8350A by an HP IB address The Model 8350A is differentiated from any other instrument on the bus by its own unique address This HP IB address is initially preset in Model 8350A the Model 8350A by a 5 segment address switch 851 located on the A8 HP IB Interface assem bly as shown in Figure 2 2 A diagram of 851 is given in Figure 2 3 Each of the 5 switches corres ponds to one of the digits of the 5 digit binary equivalent of the address as shown in Table 2 3 ASSI switch Al corresponds to the Least Signifi cant Bit LSB ofthe binary address and switch 5 corresponds to the Most Significant Bit The HP IB address can be modified by a front panel SHIFT function 2 15 Thirty one different address codes are available decimal 0 to 30 The Model 8350A is shipped from the factory preset to binary address 10011 decimal 19 as shown in Figure 2 3 In all sta
88. RMATION For further information on the HP Interface Bus the following references should prove helpful 1 Condensed Description of the Hewlett Packard Interface Bus HP Part Number 59401 90030 HEWLETT PACKARD CO 1980 2 HP IB Programming Hints for Selected Instru ments 9825 HP Part Number 59300 90005 Complete reference information on the 8350A can be found in the 8350A Sweep Oscillator Operating and Service Manual HP Part Number 08350 90001 For information on operating the 9825B the follow ing references are available 1 9825B T Operating Programming and Control Manual HP Part Number 09825 90200 2 9825B T Programming Manual HP Part No 09825 90210 If using the 9825A 1 9825A S Operating and Programming Manual HP Part No 09825 90000 2 9825A S General I O Programming Manual HP Part No 09825 90024 3 9825A S Extended Programming Manual HEWLETT PACKARD EQUIPMENT REQUIRED To perform all the example programs described in this programming note you will need the following equipment and accessories L HP 8350A Sweep Oscillator with any HP 83500 Series Plug in Note that an HP 86200 Series Plug in with the HP 11869A Adapter can be used but all references to power level and power control are not applicable and some functions do not have their full capability HP 9825 B T Desktop Computer all ROM s are internal or HP 9825A S Desktop Computer with a HP 9
89. SERIAL NUMBER PREFIX SUFFIX 1839A00285 O oPT 001 O Lum TA USA SIT Figure 1 2 Typical Serial Number Plate Model 8350 number is in two parts The first four digits followed by a letter comprise the serial number prefix The last five digits form the sequential suffix that is unique to each instrument The content of this manual applies directly to instru ments having the same serial number prefix as those listed on the title page of this manual under SERIAL NUMBER 1 16 instrument manufactured after the printing of this manual may have a serial prefix that is not listed on the title page unlisted serial prefix indicates that the instrument is different from those documented in this manual The manual for the instrument is then supplied with a Manual Changes supplement that contains information that documents the differences 1 17 In addition to change information the Manual Changes supplement contains informa _ tion for correcting errors in the manual To keep this manual as current as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement The supplement for this manual is keyed to the manual s print date and part number both of which appear on the title page Complimentary copies of the Manual Changes supplement are available on request from Hewlett Packard 1 18 For information concerning a seria
90. SWEEP Causes Marker 1 fre quency to temporarily become start of sweep Marker 2 frequency to become stop of sweep Sweep Trigger Determines how sweep will trigger CF Causes center frequency of sweep to be shifted to the frequency of the currently active marker Line switch Turns on off 8350A mainframe and plug in 8 instrument Preset Selects pre determined instrument state START CF CW AF STOP Sweep mode keys Selects mode of output and display Left frequency Control Adjusts START CW CF VERNIER or OFFSET Left Frequency Display Displays START CW CF VERNIER or OFFSET frequency in GHz or MHz depending on mode selected plus self test error codes Figure 18 Front Panel Controls 27 Supersedes None Introductory Operating Guide for the HP 8350A Sweep Oscillator with the HP 9825 Desktop Computer INTRODUCTION This programming note is a guide to the remote operation of the HP 8350A Sweep Oscillator and appropriate HP 83500 Series Plug in using the HP 9825 Desktop Computers Included in this guide are the system connections for remote operation and several example programs with descriptions of each step The 83504 is fully compatible with the Hewlett Packard Interface Bus HP IB When used with a controller such as the 9825 complete control of the sweep mode frequency limits frequency markers power level and all other front panel controls can be achieved REFERENCE INFO
91. TRODUCTION This Local Operation handbook provides information on the local use non HP IB of the 8350A Sweep Oscillator with 83500 series Plug ins Throughout this handbook are blocks of example procedures on implementing some of the information The front panel controls are divided into function groups These groups and and other information topics are arranged in the following sequence GETTING STARTED Brief example of control usage INSTRUMENT PRESET Error codes and preset conditions DATA ENTRY Numeric step units and shift keys FREQUENCY Mode selection vernier and offset FREQUENCY TIME Markers and sweep control SAVEn RECALLn ALTn Storage Registers Step Up Advance DISPLAY FUNCTIONS Blanking Modulation and Sweep Out In 83500 SERIES PLUG INS Power signal and crystal markers USE WITH SPECIFIC MEASUREMENT EQUIPMENT HP 8755S Frequency Response Test Set HP 8410B Network Analyzer HP 7010B and other X Y Recorders HP 5343A Frequency Counter APPENDIX Rear panel connector information APPENDIX 2 Use of 86200 series Plug Ins with 11869 Adapter APPENDIX 3 Summary of Sweep Oscillator front panel controls with fold out front panel drawing GETTING STARTED NOSE 86200 series RF Plug in and 11869A Adapter are used the plug in coding on the adapter must be set properly to get the correct frequency display When the 8350A is turne
92. TT PACKARD 8350 Operating Information SECTION OPERATING INFORMATION 3 1 INTRODUCTION 3 2 Thissubsection contains a index of keys and functions which refer to the figured functional blocks at the end of this subsection Included in this section are descriptions of all front panel controls connectors and indicators operator s checks operating instructions and operators maintenance 3 3 SAFETY 3 4 Before appplying power refer to SAFETY CONSIDERATIONS in Section I of this manual 3 5 The information cautions and warnings in this manual must be followed to ensure safe operation and to keep the insturment safe WARNING Before the instrument is switched on all protective earth terminals extension cords auto transformers and devices connected to it should be connected to a protective earth grounded socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury Only fuses with the required rated current and specified type should be used Do not use repaired fuses or short circuited fuseholder To do so could cause a shock or fire hazard Before the instrument is switched on it must be set to the voltage of the power source or damage to the instrument may result 3 6 OPERATING CHARACTERISTICS 3 7 Table 3 1 briefly summarizes the major operating characteristics of the Sweep Oscillator The table is not int
93. To Center Frequency Square Wave Amplitude Modula tion On Off Marker Off Marker 1 2 Sweep On Off Milliseconds MHz Marker Off Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 Network Analyzer Trigger 8410B Output Active Parameter Output Learn String Output Mode String Output Interrogated Parameter Output Status bytes Output Micro Learn String Power Level Power Sweep On Off Recall Register RF Power On Off Service Request Mask RF Blanking On Off Reset Sweep Seconds Frequency Step Size Shift Function Slope On Off Manual Sweep Power Step Size Step Size Sweep Time Save Register external Sweep Take Sweep Internal Sweep Trigger Line Sweep Trigger External Sweep Trigger Single Sweep Step Up Increment CW Vernier Acceptable Numeric Data NOTES 1 Program codes of the form XXm use m to turn the function On or Off 1 or 0 For the storage register functions the n is 1 through 9 2 The 8350A ignores spaces plus signs negative signs except when valid and any unexpected characters Program codes can be upper or lower case alpha characters Model 8350 to send the message by the Service Request Mask RM function Error in syntax Parameter value modified to default value Hardware failure End of sweep 3 89 The 8350A can send a Require Service message in either the local or remote mode Further information pertaining to the instrument state can be obtained
94. able Line 70 Printonthe CRT display the programmed CW frequency Line 80 Program the CW frequency using the default data format Line 90 Go to line 60 Line 100 Image statement is set up for program ming the CW frequency with a 1 MHz resolution Line 110 Program the CW frequency via image statement in line 100 Line 112 Go to line 60 The equipment setup is the same as the previous example Reset the 9835A scratch the 9835A memory then type in the above program Then do the following 1 Run the program The 9835A displays CW 7 555 GHz The 8350A changes from the instrument preset state of Start Stop sweep to a CW frequency of 7 555 GHz 2 Press CONTINUE on the 9835 The 9835A now displays CW in GHz new CW frequency value in GHz then press 3 The 8350A will be programmed to the new CW frequency with the new value printed on the CRT display The program jumps backto step 2 above When inputting the CW frequency try several values each with a different number of digits after the decimal point Notice that the 8350 displays the frequency to 3 decimal places 1 MHz frequency resolution Values with better than 1 MHz fre quency resolution are rounded to the nearest MHz by the 8350A However when the 98354 is reset all numeric output data defaults to the FIXED 2 or fixed 2 decimal places format Thus the 9835A rounds the desired frequency to the nearest 10 MHz To
95. able When Sweep Oscillator is used in swept mode this function enables the use of the 5343A Microwave Frequency Counter to count Start Stop or Marker frequencies LIMITATIONS CONCERNS 1 Al frequency markers are initialized to the value of the center frequency of the frequency range of the plug in at power on Frequency markers if active and the present value is out of the present sweep frequency range will be reassigned the value of the present effective center frequency when the FREQUENCY TIME knob is first turned 3 Ifno markers are presently active when entering A Markers 1 and2 are assumed the active and previously active markers respectively 4 IfMarker 1 frequency is higherthan Marker2 frequency then these values are permanently interchanged in Marker Sweep mode 5 Start and Stop values are modified to correspond to the new center frequency and old sweep width in MKR CF Likewise the A Frequency Span and Start Stop may be modified so that the new frequency sweep 15 within the frequency range of the plug in 6 If no marker is presently active the previously active marker is assumed At power on Marker is assumed to be the active marker 7 ifMarker 1 and or Marker2 are not on when entering Marker Sweep mode they are turned on and their previous values used At power on all markers are assigned the value of the effective center frequency of the plug in frequency range 8 Ifsweep width is out of range whe
96. acd wos a MHz Data Entry asqa q a aaa Network Analyzer Trigger HP IB functions Offset Frequency Sweep Output Active Parameter HP IB Only Functions Power Level Power Control 22622 Y UA Power Sweep Power Control Recall n Storage Registers RF Power 1 Save n Storage 1 Shift Dat D By beoe Serie Single Sweep Trigger Sweep Sweep Trigger Slope Power Control Slope Cal Power Control 6s oru deb trice ie Bee acids Square Wave Modulation Blanking Modulation Start Sweep Frequency Sweep Mode Step Size Data ENUY ayq Stop Sweep Frequency Sweep Mode Time Sweep Frequency UP 44 Step key Data Enty EQUIS A Vernier Frequency Sweep Operating Information Model 8350A LOCAL OPERATOR S CHECKS DESCRIPTION The Preliminary check provides assurance that most of the internal functions of the Sweep Oscillator are working The main check provides a general check of the overall functions of the Sweep Oscillator PRELIMINARY
97. aceable Parts WARNING For continued protection against fire hazard replace only with 250 V fuses of the same current rating and type normai blow 3 102 To replace the ac fuse the Line switch should be switched off then the ac line cord removed from the power source and instrument With the line cord removed access may be gained to the fuse compartment The fuse may be removed by pulling the lever inside the fuse compartment The internal fuses should only be replaced by a qualified service technician 20 Model 8350A WARNING it is important that the following mainte nance procedures be executed to retain the safety features which have been designed into the instrument 3 103 Air Filter 3 104 The cooling fan located on the rear panel has a metal filter attached which will require periodic cleaning Due to the variety of environ mental conditions the interval between cleanings cannot be estimated Error signal E016 indicates reduced air flow through an increase in temper ature in the cooling system When this error is noted on display a clogged filter may be the reason To clean the filter refer to Section 8 of the manual 3 105 3 106 Ifplug ins are changed frequently and or the interconnectors are dirty the 8350A plug in interconnect connector may require cleaning to avoid voltage losses tune voltage 3 107 3 108 If the Sweep Oscillator requires service and the operators maintenance is n
98. addition of front handles Installation instructions are also given in Figure 2 11 Additional Option 909 Kits may be ordered as HP Part Number 5061 0083 2 48 Battery Operation Option 001 2 49 Instruments with Option 001 contain a battery pack inserted in the battery holder with a battery hold down clamp and a modified A3 Microprocessor board With Option 001 installed the instrument has a nonvolatile memory which retains the contents of all instrument state storage registers the current instrument state and the HP IB address When shipped from the factory the batteries are fully charged The batteries will retain a sufficient charge to hold the memory contents for approximately 20 days from the date at which they were fully charged The batteries are charged within the instrument and a full charge is maintained at all times when the instrument LINE switch remains ON The batteries do not charge when the instrument LINE switch is OFF When fully discharged the batteries will typically take approximately 33 hours to obtain a full charge Allow the instrument to be on for at least 24 hours when new or when the instrument has been turned off for a sufficiently long enough period of time that the batteries might have become discharged to a level where memory contents may have been lost Additional Option 001 Battery Kits may be ordered for the Model 8350 to upgrade a standard instrument to an Option 001 instrument by ordering HP
99. address or Service Request Mask value OUTPUT DATA The 8350A has several output modes that allow the user to learn and interrogate the present instrument state The following output modes are available Learn String Micro Learn String Mode String Interrogated Function Active Function Status e e 9 9 The program codes and syntax to enable each function are described in the Input Data section The Learn String Micro Learn String Mode String and Status functions send a Data message consisting Table 1 Input Programming Codes 1 of 4 PROGRAM CODE NUMERIC FORMAT NUMERIC VALUE SCALE FACTOR RANGE RESOLUTION x10 Hz MODE FUNCTION PREFIX ACTIVATE SWEEP LIMITS MODE SUFFIX START STOP gt e N gt A Start Stop Sweep Center Frequency AF Sweep AF CW CW Frequency SWEPT CW FREQUENCY MARKERS MARKER 1 MARKER 2 Turn On and Set Marker Frequency MARKER 3 M3 1 2 3 4 MARKER 4 MARKER 5 OFF M2 OFF M3 OFF MC Plug in Approxi lt 10 Hz Z c 1 2 3 4 a Bandwidth X103Hz X1 Hz 0 05 0 0004 of BW of BW x10 Hz SHCW SHVR HZ lt MN x106Hz T Plug in Approxi Frequency mately 0 4 x10 Hz Limits of present AF GZ MZ KZ HZ X1 Hz Ui x Turn Off A gt A N f Frequency Marker M4 OFF M5 OFF lt e Turn Off Ail Markers AL
100. amming The length of the Micro Learn String is fixed independent of the functions selected and the plug in used In this mode the 8350A numeric displays are blanked and the Micro Learn String bytes are used to pre load the appropriate internal DAC s For proper operation the 8350A must be in the CW mode and the plug in CW Filter capacitor should be off Since the Micro Learn String overrides the present values of the 8350A when it is input do not program any functions while in this mode Ifa function is programmed one of two things may occur 1 the 8350A may exit the Input Micro Learn String mode with the previous sweeper settings restored or 2 the 8350A may interpret the program codes as another Micro Learn String and cause the instrument to enter a non predicatable state The only function that is valid for execution while the Micro Learn String is in effect is the Network Analyzer Trigger function To output the Micro Learn String 1 program the desired CW frequency 2 program the OX code then 3 read the 8 byte string To input the Micro Learn String program the IX code and the 8 byte string When the user desires to exit the Input Micro Learn String mode and return to the normal mode of operation the user must exit properly When in the Input Micro Learn String mode the 8350A accepts the input program code bytes in a special binary entry mode The mode is exited by programming Figure 3 17 HP IB Only Functions 1 of 7 Ope
101. an error message was printed on the strip printer The program repeats the above input prompt To stop the program press STOP or RESET t NOTE For Program 7 to function properly change line 0 to 0 cli7 clr 719 wrt 719 IPMD1RM amp char 97 This change enables status bit 5 SRQ on Syntax Error and bit 0 SRQ on Numeric Parameter Altered to Default Value PROGRAM CODES CODE DESCRIPTION CODE DESCRIPTION AKm Amplitude Marker On Off MZ MHz Almn Alternate Sweep On Off MO Marker Off A1 Interna Leveling 1 Marker 1 A2 External Crystal Leveling M2 Marker 2 A3 External Power Meter Leveling M3 Marker 3 BK Backspace M4 Marker 4 Amplitude Crystal Marker On Off 83522 ii 83525 Only NT Network Analyzer Trigger 8410B CF Center Frequency OA Output Active Parameter Clm Intensity Crystal Marker On Off 83522 Qj Output Learn String 83525 Only OM Output Mode String CW CW Frequency Output Interrogated Parameter C1 1 MHz Crystal Marker Frequency 83522 Output Status Bytes 83525 Only OX Output Micro Learn String C2 10 MHz Crystal Marker Frequency 83522 83525 Only PL Power Level C3 50 MHz Crystal Marker Frequency 83522 PSm Power Sweep On Off 83525 Only RCn Recall Register C4 External Crystal Marker Frequency 83522 1 RFm RF Power On Off 83525 Only RM Service Request Mask DF Delta F Frequency pan RS Reset Sweep DM dBm SC Seconds DN Step Down Decrement SH Shift Function DPm Disp
102. ange of interest If swept the measurement data taking machine would need to sample the RF signal at a very fast rate to maintain accurate frequency information too This is typically not accomplished Stepped CW sweeps can be accom plished in several ways with the 8350A 1 Program sequential CW test frequencies 2 Program the frequency sweep range then enable the manual sweep mode Perform stepped manual sweep by repetitively pro gramming the step up increment function 3 Program the CW frequency to the start fre quency the Step Size to an appropriate value then repetitively program the step up incre ment function Considering the speed of programming the above approaches the third is the most efficient time wise This program illustrates a stepped sweep using this approach PROGRAM 6 PROGRAM 6 EXPLANATION Line 0 Set the 8350 to a predefined instrument state and enable the square wave modulation Line 1 The 9825 displays Start Freq GHz input prompts for start frequency of the sweep Store it in the variable A Line 2 The 9825 displays Stop Freq GHz input prompts forthe stop frequency ofthe sweep Store it in B Nuoto MEET ETIN SENATE RANA OESTE 3 The present values ofthe Start Frequency Stop Frequency and Sweep Time are sequentially interrogated and then printed on the internal strip printer of the 9825 Line 3 The 9825 displays Step Size
103. anging between CF AF and START STOP modes only the method of display changes the swept RF output remains the same When either CF or AF is activated the left display is center frequency CF the right display is delta frequency AF Both the CF and AF can be changed via the appropriate control number units keyboard and step size keys CW When activated causes the 8350A to output a constant frequency The value ofthe CW frequency is displayed on left FREQUENCY display The CW frequency is the same as the center frequency CF of the previous swept range The CW frequency value can be changed using the Figure 3 Frequency Controls 1 of 2 Model 8350 Local Operation control data entry keyboard or step keys In CW mode the SWEEP OUT voltage is equal to percent of full band Pressing SHIFT CW enters a swept CW mode with the SWEEP OUT being a0 to 10 volt ramp that results in the display trace being a flat horizontal line This is often useful when reading values e g dB ofattenuation from a CRT screen when ata CW frequency FREQUENCY VERNIER The effective center frequency of any mode CW or swept may be adjusted with high resolution up to 0 05 of the frequency band being used with the vernier Pressing the VERNIER key activates the function and sets the left FREQUENCY display to read the vernier value in MHz 1 70 light is on whenever a frequency vernier or frequency offset is present in any mode After setting vernier
104. arker Request input TTL 16 output TTL 17 Alternate Swp En output 18 Stop Request input TTL 19 Digital Ground in out 20 Blk Pulse Request input TTL 21 Counter trigger output TTL 22 Step Up Advance input TTL 23 Inverse Penlift output 24 8410 Ext Trigger output TTL 25 ALT SWP INTERFACE connector may be connected to the 8755C ALT SWP INTERFACE connector via cable HP Part No 8120 3174 to provide Alter nate Sweep Function Open collector 4 volts dc 40 ma Figure 3 2 Rear Panel Features Operating Information Model 8350A Table 3 1 Sweep Oscillator Operating Characteristics FREQUENCY RANGE Set automatically when plug in installed START STOP CENTER FREQUENCY AF Marker gt Center frequency Marker Sweep CW Frequency MARKERS 3 settable frequency markers amplitude and intensity SWEEP TIME Range 01 100 seconds POWER Control power level with 83500 Series Plug ins SWEEP MODES Table 3 2 Functional Block Index 1 of 2 ALC Mode ALC Mode ALL OFF Frequency Markers Alternate Sweep Storage Registers Amplitude Mkr Plug in Crystal Markers Amplitude Markers 8350A Modulation Blanking Back Space Data Entry Blanking Display Modulation Blanking Modulation Blanking RF Modulation Blanking Center Frequency Frequency Sweep Mode Crystal Markers Crystal Markers CW Mode Frequency Sweep Mode CW Filter Signal Control Data Entry Data Entry
105. ary switch on top of the 98034Aissetto 7 If notthensetitto 7 since this isthe select code for the interface card for all programs found within this guide 5 Connect the 24 pin HP IB connector of the 98034A to the rear panel HP IB connector ofthe 8350A This connector is tapered to insure proper connection CAUTION Do not attempt to connect black metric threaded screws on one connector with silver English threaded nuts on another connector or vice versa as damage may result metric conversion kit which will convert one cable and one or two instruments to metric hardware is available by ordering HP Part No 5060 0138 6 All programs within this guide expect the 8350A HP IB address to be decimal 19 The 8350A HP IB address switches are located inside the instrument and are factory preset to decimal 19 The present HP IB address can be found by executing the front panel Set HP IB Address function by The FREQUENCY TIME display will indicate the present decimal address If the number dis played is not 19 then reset it by Press 1 9 This HP 1B address will remain in effect until the instrument is powered off when the internal address switches are read at power on unless 8350A Option 001 Non volatile Memory is used Since Example 4 requiresthe 8350A tobe powered off and then on the internal address switches should be reset to 19 if necessary CHECK OUT Turn on the 9825 and the 8350 The 9825
106. ating unit the Model 8350A Sweep Oscillator must be used in conjunction with RF plug in unit which operates in the desired frequency range The HP Model 83500 Series RF Plug in units have been specifically designed for use with the Model 8350A With the addition of the Model 11869A RF Plug in Adapter the HP Model 86200 Series RF Plug ins may also be used with the Model 8350A 1 44 OPTIONS 1 45 Option 001 Nonvolatile Memory 1 46 Option 001 instruments contain a battery pack inserted in the battery holder with a battery hold down clamp and a special A3 Micro processor board With Option 001 installed the Model 8350A has a nonvolatile memory which retains the contents of all instrument state storage registers the current instrument state and the HP IB address When fully charged the batteries will retain a sufficient charge to hold the memory contents for approximately 20 days The batteries are charged within the instrument and a full charge is maintained when the instrument LINE switch is ON 1 47 An Option 001 Battery Kit may be ordered for standard Model 8350A Sweep Oscillators to upgrade them to Option 001 capability by ordering HP Part Number 08350 60013 This kit contains a battery pack a battery pack hold down clamp and a special A3 Microprocessor board other necessary wiring and hardware tions have been made at the factory on all standard instruments 1 48 Option 400 400 Hz AC Powe
107. atus byte is equivalent to the Status Byte of the Serial Poll the second status byte is the Extended Status Byte which provides additional information See Table 2 for a description of each Status Byte Status Byte values are cleared upon execution of a Serial Poll Status Byte message Device Clear message and or the Instrument Preset function TRIGGER The 8350A responds to the Group Execute Trigger GET command to the 1 bus select code and Selective Device Trigger to the 8350A HP IB address The effect of the GET command is to trigger the sweep if presently in the Singie Sweep Trigger mode only otherwise no action is taken The response is as if a Data message consisting of the Single Sweep Trigger program code were transmitted CLEAR The 8350A responds to both Device Clear DCL and Selective Device Clear SDC messages by clearing the Status Byte and the Extended Status Byte REMOTE LOCAL CHANGES The Local to Remote change is programmed by the Selective Device Remote Enable message REN and 8350A address The 8350A instrument state is unchanged with all future changes affected by program codes only Note that all front panel func tions are disabled in Remote except the LCL key The Remote to Local change is programmed by the Go To Local GTL command or by setting the REN line false high The 8350A instrument state is unchanged with all future changes affected by the front panel controls The 8350A
108. ay plug in forms a phasemeter and a ratiometer for direct phase and amplitude ratio measurement on RF voltages These measurements can be madeon single frequencies and on swept frequencies from 110 MHz to 18 GHz Several RF plug in units for the Model 8350A are capable of multi octive sweeps in this range The Model 8410B has an Auto Frequency range mode which gives it the capability of automatically tracking the Model 8350A Sweep Oscillator over octave and multi octave frequency bands Two interconnections to the Model 8350A are necessary to ensure that the Model 8410B will phase lock properly The Model 8410B Source Control Cable HP 08410 60146 connects the Model 8410B rear panel SOURCE CONTROL connector to the Model 8350A rear panel PROGRAMMING CONNECTOR Addi tionally the sweep oscillator RF plug in 1V GHz output connects to the Model 8410B rear panel FREQ REF INPUT The Model 8410B Source Control Cable connector pins and signals are illustrated in Table 1 3 1 68 Model 8755 Frequency Response Test Set 1 69 The Model 8350A Sweep Oscillator is compatible with the Model 8755 Frequency Response Test Set for broadband swept scalar Model 8350A measurements The Model 8350A provides in ternal 27 8 kHz square wave modulation ofthe RF output eliminating unnecessary cable connec tions to the Model 8755 or the use of an external modulator The Model 8350A can also produce alternate sweeps through use of the ALT n function which
109. borts present sweep when first pressed Subsequent keying will trigger or abort single sweeps at current sweep time MARKERS Any or all of the five markers M1 through M5 may be enabled by pressing the marker key corresponding to the marker desired When a marker is activated it is set to its last active frequency unless INSTRUMENT PRESET has been activated in which case the marker will be set to the center of the fullband sweep A marker can be in one of three states ACTIVE Lamp in center of key flashing ON Lamp on OFF Lamp off Only one marker at a time the active marker can have its value altered The five mainframe markers are normally supplied through the positive Z axis blanking pulses connector on the rear panel By pressing the AMPTD key the markers may be displayed as amplitude dips on the RF output When a marker is active the keyboard FREQUENCY TIME control and step keys can be used to modify its value The value of the active marker in GHz MHz is displayed By pressing OFF the active marker only will be turned off If multiple markers are on the remaining lamps will remain lit although the display will go blank A marker may be initially activated or returned to active state by pressing the corre sponding marker key All markers may be turned off simultaneously by pressing SHIFT OFF Example Press M3 Note M3 lamp f
110. ch function 1 pro grammed with a string of ASCH coded characters that follow one of the following sequences Function Code Numeric Value Units Terminator EOS Function Code Numeric Value EOS Function Code EOS 3 60 Function Codes Function codes are typically 2 to 4 character mnemonics For func tions that have a numeric value associated with it passing the function code only will enable and activate the function for further data entry 3 61 Numeric Value These are either a single decimal digit a set of 14 characters or less representing a number or a string of binary bytes If the numeric value is a single digit 0 through 9 it represents a storage register string of 14 characters maximum can be expressed in expo nential decimal or integer form Acceptible numeric formats are referenced in further sections by the following format syntax Exponential d d4 d E dd Decimal td d d qdg Integer td d Single Digit d Binary String Binary Byte b Model 8350A Where the character d indicates a leading or trailing zero a space or a numeric digit 0 through 9 The Characters indicate a variable number of the previous characters The character b indicates an 8 bit binary byte Numeric values that are not binary in nature are scaled by the appropriate units terminator 3 62 Units Terminator These are 2 character codes that terminate and scale the associated numeric
111. change this free field format to more decimal places modify the fixed format statement in line 20 to FIXED 5 then re run the program Another approach is to utilize the image statement to set the desired number of decimal places To use the image statement in the program do the following on the 9835A Press 51 Type DEL 8 Press 0 90 This should delete lines 80 and 90 from program 2 and allow the use of lines 100 110 and 120 instead Run the modified program again and use the same steps for operation as before Now if the value inputted has a frequency resolution greater than 1 MHz the 9835A does the rounding instead of the 8350A This is the preferred programming approach Change the image statement for 10 MHz frequency resolution and verify the results from the 8350A frequency display Since a device select code address can be a variable verify that this can be used in the modified or original program 2 by doing the following 1 Insertbefore Line 10anew line with the variable 2 Modify the output statement s by editing the necessary lines and changing the OUTPUT 719 to OUTPUT Swp and OUTPUT 719 USING 100 to OUTPUT Swp USING 100 Typically the sweeper is programmed for the proper sweep frequency range sweep time power level and marker frequencies for a test measurement This program sets up the sweeper for a general purpose situation using several dedicated image statements Note that no
112. complete pin assignment listing refer to the Operating Manual for the particular X Y recorder being used Pen lift pin location on X Y recorders Recorder 7010B 7015B 7035B 7004B 7034A 7044A 45A 47 A 7046 Pen Lift Pin No 21 Local Operation 22 B Bisan rS 2 VE FHEQUENCY COUNTER HE MRT Y PRE KA 19 5 wd meii Figure 14 5343A Microwave Frequency Counter 5343A FREQUENCY COUNTER The 5343A Microwave Frequency Counter can be used with the 8350A to measure frequencies in swept mode in addition to normal CW frequency measurements During swept operation the 5343A will stop the 8350A sweep and count a selected frequency parameter such as the START frequency STOP frequency or any frequency markers in the sweep range To accomplish this the 8350A and 5343A communicate via two signal lines Counter Trigger Stop Sweep on the 8350A and Sweep Interface A and B on the 5343A that enable the 8350A to externally trigger the 5343A and then allow the 5343A to stop the sweep long enough to gate and count the selected frequency parameter See Figure 15 for the test set up Measuring CW frequencies When measuring CW frequencies the CNTR TRIG and STOP SWEEP connections are not necessary The 5343A should be in the AUTO mode and the internal square wave modulation on the 8350A must be off Auxiliary Output The auxiliary output of an RF Plug in if available may be used with the 5343A When using the aux
113. d by changing the values in lines 60 70 80 90 and or 100 then re run the program Learning An instrument State PROGRAM 4 PROGRAM 4 EXPLANATION Line 10 Define the first element of any array to be at index number 1 Line 20 Set the length of the A string to 100 characters Line 30 Set up the string A as an I O Buffer for data storage in fast read write data transfer operations Line 40 Set the 8350A to a predefined state via instrument preset and enable the square wave modulation Line 50 Return the 8350A to local control Line 60 Temporarily stop program execution Line 70 Program the 8350A to output the Learn String Line 80 Read the Learn String into the 85A the fast data transfer function using the 1 EOI End or Identify signal to terminate the transfer Store the Learn String in A Line 90 Extract the Learn String information from the I O Buffer by removing the buffer pointers Re save the Learn String only in Line 100 Temporarily stop program execution Line 110 Program the 8350A to accept a Learn String then send the new Learn String to the 8350A Line 120 Stop program execution Setup the equipment as in example 3 using the analyzers CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 85A scratch the 85A memory then type in the above program
114. d enable the in ternal 27 8 kHz Square Wave Ampli tude Modulation Line 60 SetaStart Stop Sweep of 3 0to 7 0 GHz Line 70 Setthe Output Power Levelto 10dBm Line 80 Setthe Sweep Time to 50 milliseconds Line 90 Set Marker 1 to 4 GHz Line 100 Set Markerg2 to 6 GHz Line 110 Stops program execution Set up the equipment as shown in Figure2 by adding the 8755C the 180TR or 182T the 11664 atest device like 4 to 6 GHz Bandpass Filter It is important that the two rear panel connections from the 8350A to the 8755C 182T are made fora proper CRT display For the example measurement set the following front panel controls On the 8755C Channel 1 Display OFE press all the display push buttons so that they are all out Channel 2 Debes B deine pea bees Et neat 10 dB Reference Level 10 dB Reference Level OFF On the 182T or 180TR X1 INT 88458 DESKTGP COMPUTER HP 8350A SWEEP OSCILLATOR 87556 182T SWEPT AMPLITUDE ANALYZER 98034A agsut amu monu 365 POS Z BLANK SWEEP OUTAN tFront ar Rear ig BEER ESER 3988 6 990 DEVICE UNDER TEST 11564 DETECTOR Figure 2 Equipment Setup For Program 3 After connecting the equipment reset the 98458 scratch the 9845 B memory then type in the above program Then run the progra
115. d line power failure If an error condition exists the user can instruct the 8350A to request service from the 85A by initiating a Service Request SRQ The 85A can detect whetheran SRQ has taken place on the bus by analyzing bit 7 see note below of the Status Byte of the 82937A HP IB Interface Two modes are available for analyzing the 82937A Status Byte 1 periodically read the Status Byte or 2 enable bit 7 to interrupt the program when it is set In either case once it is determined that the 8350A has requested service the specific error condition s can then be determined by reading and analyzing the Status Bytes of the 8350A The 8350A has two Status Bytes each consisting of 8 bits with each bit indicating the present status of a particular function or condition See Figure 3 fora complete description of the conditions associated with each Status Byte bit The user can analyze these Status Bytes for every SRQ or more simply instruct the 8350A to issue an SRQ only if a specific set of error conditions exists The set of conditions is determined by a numeric value passed by the Request Mask function This numeric value is generated by summing the decimal values of each Status Byte bit to be checked This program demonstrates the capability of the SRQ and Status Bytes to detect an error condition TABLE 1 8350A Status Byte Descriptions STATUS BYTE 1 EXTENDED STATUS BYTE 42 Bit Functions not usable with 86200 Se
116. d on or when the INSTR PRESET key is pressed the front panel ofthe 8350A is setto the following pre determined state The RF outputis swept overthe full frequency range of the plug in at the maximum specified leveled output power minimum sweep time for the RF Plug in installed and the internal square wave amplitude modulation is off Local Operation Model 8350A Example 8350A with 83525A 0 01 8 4 GHz Plug in To change from the INSTR PRESET state to 42 to 62 GHz sweep in START STOP mode 0 20 second sweep time 4 5 dBm output power 27 8 KHz square wave modulation on RF output L Press the key and then rotate the START control clockwise to increase the start frequency until the display above the START key reads 4200 GHz Rotate the STOP control counterclockwise to decrease the STOP frequency to 6 500 GHz Press the 1 key then turn the FREQUENCY TIME control clockwise to increase t eep time to 0 2 second displayed on the FREQUENCY TIME display Press key to activate the internal 27 8 KHz square wave modulation The lamp enter of the key will be on Press the key then turn the plug in POWER control until the display reads 4 5 dBm T INSTRUMENT PRESET This condition occurs when the power is turned on or when the INSTR PRESET key is pressed INSTR PRESET causes an internal self test to occur after which the instrument will be set to the preset condition If certain internal errors or fa
117. de forthe interface card forall variety programs found within this guide or any appropriate Oscilloscope with Crystal 5 Connect the 24 pin connector of the Schottky Aitenuator ang BINC Cabling 98034 to the rear panel HP IB connector of the 4 Any test device over the frequency range of the 8350A This connector is tapered to insure 83500 Series Plug in proper connection HP INTERFACE BUS 77 98034 8350A 83500 PLUG IN ROM Drawer ROM Drawer SESTA al ta EM 7 eee enc t5chesp 10 E DOOCOL oO EE k C1 i Figure 1 System Connection CAUTION Do not attempt to mate black metric threaded screws on one connector with silver English threaded nuts on another connector or vice versa as damage may result metric conversion kit which will convert one cable and one or two instruments to metric hardware is available by ordering HP Part No 5060 0138 6 Allprograms within this guide expect the 8350A HP 1B address to be decimal 19 The 8350A HP IB address switches are located inside the instru ment and are factory preset to decimal 19 To execute a front panel Set HP IB address which will display the present HP IB address Press SHIFT LCL The FREQUENCY TIME display will indicate the present decimal address To reset the number if 19 is not displayed Press 1 9 GHz This HP IB address will remain in effect until t
118. e 8350A If the 8350A does not receive the expected number of characters it will undergo an Instrument Preset 4 The valid functions for the Output Interrogated Parameter are FA CW CF DF FB VR SHVR M2 M3 M4 M5 SHMI SF SM ST PL PS SL and SP 5 The Request Mask byte value is reset only when another value is programmed It is unaffected by Instrument Preset 6 The plug in FM Sensitivity range is reset after an Instrument Preset to the value selected by the internal switch 7 The Output Learn String Output Micro Learn String Output Mode String and Output Status functions send a Data message consisting of a string of 8 bitbinary bytes terminated using the bus END command EOI and ATN true with the last byte The Output Interrogated Parameter and Output Active functions send a Data message consisting of a 14 character ASCII string representing the numeric value in exponential form terminated with a Carriage Return Line Feed CR LF Binary Syntax b b EOT Numeric Syntax d dddddE dd CR LF Where the character b indicates an 8 bit binary byte and d indicates a decimal digit 0 through 9 Note that the binary output format could have bytes that may be misinterpreted as Carriage Returns and or Line Feeds so the user should defeat the ASCII CR LF as valid character string terminators and rely on the byte count 8350 Output Response laput REMOTE FUNCTION PROCEDURE UPDATE ON DUI DUQ
119. e Amplitude Modulation On Off MO Marker Off MPm Marker 1 2 Sweep On Off MS Milliseconds 0 9 Acceptable Numeric Data NOTES Program codes of the form XXm use m to turn the function On or Off 1 or 0 For the storage register functions the n is 1 through 9 The 8350A ignores spaces plus signs negative signs except for vernier offset and power values and any unexpected characters Program codes can be upper or lower case alpha characters For more information call your local HP Sales Office or nearest Regional Office Eastern 201 265 5000 Midwestern 312 255 9800 Southern 404 955 1500 Western 213 970 7500 Canadian 416 678 9430 Ask the operator for instrument sales Or write Hewlett Packard 1501 Page Mill Road Palo Alto CA 94304 In Europe Hewlett Packard S A 7 rue du Bois du Lan Box CH 1217 Meyrin 2 Geneva Switzerland in Japan Yokogawa Hewlett Packard Ltd 29 21 Takaido Higashi 3 chome Suginami ku Tokyo 168 5952 9308 Printed in U S A CE SHRED FOR Supersedes None SEPTEMBER 1986 Quick Reference Guide for the HP 8350A Sweep Oscillator INTRODUCTION This programming note is a reference guide for the remote operation of the HP 8350A Sweep Oscillator and HP 85300 Series Plug ins This note is intended for use by those familiar with HP IB programming and the basic functions of the HP 8350A Sweep Oscillator For complete programming information ref
120. e amount of slope Press SLOPE again to remove all compensation POWER SWEEP This function enables the output power to be swept up The maximum calibrated power sweep range is typically 10 dB Note that when using plug ins with Option 002 Step Attenuator the power cannot be swept across the internal attenuator switch points The procedure for performing a power sweep is l After selecting the output frequency sweep range or swept CW mode use the power level to set the starting value for the power sweep 2 Press the POWER SWEEP key the display will now read the dB SWP By using the POWER control data entry keyboard or step keys set the desired sweep range Press the POWER SWEEP key again to turn the power sweep off Figure 7 Plug in Controls 1 of 2 13 Local Operation 14 Signal Control RF ON OFF Turns the RF power on and off CW FILTER ON OFF When on this filters the internal oscillator s tuning voltage to provide a more stable CW or MANUAL SWEEP frequency output During swept operation this filter is always disabled ALC Automatic Level Control Mode INT EXT MTR INT Provides internal leveling of output power at the output connector The 83500 series Plug in must be on INT leveling for calibrated output power EXT This setting is used when leveling with an external crystal diode detector The front panel EXT ALC input accepts negative voltages in the 25 to 250 millivolt range typically MTR Used
121. e frequency marker functions consist of up to five independent and contiuously variable frequency markers The Marker A function displays the difference frequency between any two markers CF sets the effective sweep center frequency CF equal to the active marker frequency MARKER SWEEP initiates exits sweep between Marker and Marker 2 After exit sweep returns to original sweep limits The FREQUENCY TIME display will display active marker frequency Marker A frequency Sweep Time or frequency in manual sweep mode PANEL LAYOUT FREQUENCY TIME GHz Q M1 M2 M3 5 ALL OFF M4 sec FUNCTIONS INDICATORS Markers 1 to 5 Each marker M1 through 5 can be enabled and a frequency value defined The last marker engaged is the active marker and itis the one modifiable by the control step keys keyboard or remote control Lamp off indicates marker off lamp on indicates marker on and lamp flickering indicates marker is active Active marker off Turns off the active frequency marker and saves previous previous value The value 1s recalled when marker 1 turned on later All Markers Off Turns off all frequency markers saving the values of each to be recalled later when markers are turned on Marker Delta Selects the A mode where the FREQUENCY TIME display indicates the frequency difference between the active frequency marker and the previously active frequency marker The active markeris still active and modifiab
122. e number displayed if not 19 Press 1 9 G This HP IB address will remain in effect until the instrument is powered off since the internal address switches are read at power on unless 8350A Option 001 Non volatile Memory is used Since Example 4 requires the 8350A to be powered off and then on the internal address switches should be reset to 19 if necessary CHECK OUT Turn on the 85A and the 8350 The 85 should display the cursor in the upper left corner of the CRT display The 8350A should undergo a turn on self test consisting of the red LED numeric displays being blanked and all yellow indicator LED s on then the 8350A sweep controls are set to the instrument preset state Start Stop Sweep over the entire plug in frequency range fastest sweep time for plug in typically 10 milliseconds and maximum leveled output power for the plug in If the 8350A fails the power on self test an error message will be displayed in the far left LED display Check section 8 ofthe 8350A Operatingand Service Manual for error message decoding and diagnostics To verify that the HP IB connections and interface are functional perform the following on the 85A 1 2 REMOTE 719 3 Press E Verify that the REMote light on the 8350 is lit If this fails verify that the 82937 select code switch is set to 7 this switch is located inside the 82937A so refer to its Installation Manual the 8350A address
123. e programs described in this programming note you will need the following equipment and accessories 1 HP8350A Sweep Oscillator with any HP 83500 Series Plug in Note that an HP 86200 Series Plug in with the HP 11869A Adapter can be used but all references to power level and power control are not applicable 2 HP 9835 Desktop Computer with HP 98332A ROM actually 4 ROM s b HP 98034A Revised HP IB Interface Card Cable HEWLETT PACKARD The following equipment is not required for the programs to function but rather for a visual display of the 8350A functions 3 87555 Frequency Response Test Set with HP 8755C Swept Amplitude Analyzer HP 180TR or 182T Display Unit 11664 or 11664B Detector Two 120 cm 4 ft cables HP 11170C type or any appropriate Oscilloscope with Crystal Schottky Detector Attenuator and BNC Cabling 4 Any test device over the frequency range of the 83500 Series Plug in SET UP Figure 1 shows the system connection and switch settings for the 98034A Interface and the 9835A Desktop Computer The following procedure com pletes the setup 1 Turn off the power to the 9835A HP INTERFACE BUS 8350A 83500 PLUG IN Verify that the ROM s are installed in the 98354 If not then install the ROM s inan unused ROM drawer then insert the drawer one of the front panel slots of the 98354 Installthe 98034A interface Card into one o
124. econd MS Sweep Trigger D Figure 3 10 Sweep Sweep Trigger 2 of 2 second X10 seconds 33 Operating Information Model 8350A DATA ENTRY Step Keys Keyboard DESCRIPTION This function block contains the step key function numeric entry keyboard and terminators which allow modification of many ofthe values of functions This function block has a back key which works like a erase or rubout of the last entry Also in this function block is a shift key blue which enables shift key functions PANEL LAYOUT DATA ENTRY dBm BK SP STEP SiZE FUNCTIONS INDICATORS STEP SIZE This function allows the setting of the frequency or power level step size step up This function increments the presently active parameter value by the appro priate step size 4i step down This function decrements the presently active parameter value by the appropriate step size 0 9 Numeric digits sign and decimal point useable to input data for active function BACK SPACE This function performs a character back space or rubout to erase the last digit entered on the present numeric entry Function enabled only when entering a number and units terminator have not been entered GHz s Units terminator for Gigahertz frequency data or seconds time data M Hz ms Units terminator for Megahertz frequency data or millisecond time data dBm dB Units terminator for dbm or dB power data SHIFT bl
125. ed Status Byte If Bit 4 is true then the second status byte should be accessed via the Output Status function to deter mine the cause of the status change All other bits indicate the present status of the noted function The bits are true one if and only if the associated function condition is true STATUS BIT The 8350A does not respond to a Parallel Poll PASS CONTROL The 8350A does not have the ability to take or pass control ABORT The 8350A responds to the Abort message Inter face Clear IFC true by stopping all Listener or Talker functions ADDRESS ASSIGNMENT INFORMATION The 8350A has a primary address that is determined by an internal storage register The register is initialized upon power turn on by reading the address bits A5 thru A1 from switches located onthe 8350AA8 HP IB Assembly Note that these switches are factory preset to decimal 19 The 8350A HP IB address can be dynamically changed from the front panel in local mode by executing the Set HP IB Address command Shift Local See the 8350A Operating and Service Manual for further information Table 2 8350A Status Byte Descriptions STATUS BYTE 1 DECIMAL VALUE i FUNCTION N A REQUEST SRQ on SERVICE RQS 5 on Change in Extended Status Byte SRO on Numeric Parameter Altered to Defauit EXTENDED STATUS B wr 7 DECIMAL VALUE Airflow RF Failure Unleveled Failure on Bit Functions not usable with 86200 S
126. emory location n where n 1 9 on successive sweeps When the 8350 is in this mode the lamp will be on and the SAVEn and RECALLn keys disabled To exit from the ALTn mode press the key again the lamp wil turn off and the SAVEn RECALLn keys will become operational When using the 8350A with an HP 8755C Swept Amplitude Analyzer channel 1 displays the current instrument state and channel 2 displays the stored setting provided the 8350A 8755C ALT SWP INTERFACE cable is connected Figure 5 Save n Recall n and ALT n Keys Local Operation 11 Local Operation 12 l Hc e re GOO o 0006 JO OOO DISPLAY FUNCTIONS AMPTD MKR DISPL BLANK RF BLANK Function in effect when lamp in center of key is lit DISPL BLANK ON OFF Blanks the display during the retrace via the POS Z BLANK or NEG Z BLANK outputs RF BLANK ON OFF Blanks turns off the RF power during the retrace LIIMOD ON OFF Activates the internal 27 8 KHz square wave amplitude modulation of the RF output This feature makes the 8350A directly compatible with the HP 8755 Frequency Response Test Set The 8350A may be modified via an internal jumper to provide 1000 Hz square wave amplitude modulation for instruments like the HP 415E SWR Meter refer to the Operating and Service Manual Section 5 5 2 SWP Sweep OUTPUT SWP Sweep INPUT BNC connection SWP Sweep OUTPUT Supplies a0 to 10 Volt signal whe
127. ended to be an in depth listing of all operations and ranges For more infor mation on Sweep Oscillator capabilities refer to Specifications Table 1 1 and Supplemental Infor mation Table 1 2 3 8 Panel Features 3 9 Figure 3 1 Front Panel features provides a reference to a functional block figure number which provides a complete description of each control within the function block 3 10 Rear Panel features are described in Figure 3 2 3 11 OPERATOR S CHECKS 3 12 The local operators check Figure 3 3 allows the operator to make a quick check of the main instrument functions prior to use This check assumes that an RF plug in is installed in the Sweep Oscillator and that a 10 dB attenuator oscilloscope and appropriate crystal detector are available If these items are not available the preliminary self test may still be performed 3 13 The remote operator s check Figure 3 4 allows the operator to make a quick check to the main remote functions prior to use This test is shown in program statements for HPL and BASIC and a general flow chart 3 14 OPERATING INSTRUCTIONS 3 15 Located underneath the Sweep Oscillator is a pullout information card which contains information on general operating instructions some remote programming information and some plug in usage information 3 16 Fora complete reference of each function refer to the function group index Table 3 2 3 17 LOCAL OPERATION 3 18 The operation
128. ent state has been restored EXAMPLE PROGRAM 5 Interrogating The Present Value Of A Function OROS Sent RACES UC RR IUUD HOP RE RA VEIE TIEFER NIANSE EET Sd erit teo nnt rt mr tete ene a aa ge trcs teo lit While the 8350A Learn String enables the user to completely save a string of characters that define the present instrument state the information is densely packed and encoded to save memory space If the user wishes to determine the actual value of a specific parameter say the Start Frequency it would require a tedious process to extract a numeric value from several characters within the Learn String An easier approach is to use the Output Interrogated Parameter function of the 8350A With this function the 9825 instructs the 8350A to output the present numeric value of a specified function Any function that has a numeric value associated with it except Step Size can be interrogated Note that if the parameter is not presently active the 8350A uses a computed value or its previous value The following program demonstrates the capability of the inter rogate function PROGRAM 5 PROGRAM 5 EXPLANATION Line 0 Set the 8350A to a predefined instrument state via instrument preset and enable the square wave modulation Return the 8350A to local control then stop program execution Line 1 Program the 8350A to output the present value of the Start Frequency Read the value into the 9825 and store it in t
129. eries Plug ins and 11869A Adapter FUNCTION E Self Test Failed more information call your local HP Sales Office or nearest Regional Office Eastern 201 265 5000 Midwestern 312 255 9800 Seuthern 404 955 1500 Western 213 970 7500 Canadian 416 678 9430 Ask the operator for instrument sales Or write Hewlett Packard 1501 Page Road Palo Alto CA 94304 In Europe Hewlett Packard SA 2 rue du Bois du Lan Box CH 1217 Meyrin 2 Geneva Switzerland In japan Yokogawa Hewlett Packard Ltd 29 21 Takaido Higashi 3 chome Suginami ku Tokyo 168 5952 9309 Printed in U S A
130. erto the HP 8350A Operating and Service manual INPUT DATA The 8350A Sweep Oscillator and 83500 Series Plug ins accept programming codes that contain infor mation for programming all of the front panel and special HP 1B only functions except the Line switch and Set HP IB Address The programming data string consists of a string of ASCI coded characters com posed of one or more the following control fields Sweep Mode Limits Frequency Markers Sweep Trigger Modulation Blanking Step Size instrument State Registers Power Level Power Control ALC Modes Crystal Markers 83522 83525 Plug ins only Special HP IB Only Functions e e e e e e Input Syntax The 8350A responds to program codes in the order in which they are received Each function is programmed with a string of ASCII coded characters that follow one of the following sequences Function Codel Numeric Value Units termi nator EOS Function Code Numeric Value EOS Function Codel EOS NOTE The HP IB program code sequence typicaily mirrors that of the local front panel keystroke sequence VH EWLETT PACKARD CO 1980 HEWLETT PACKARD Function Codes Prefix Activate Function codes are typically 2 to 4 character mnemonics For functions that have a numeric value associated with it passing the function code only will enable and activate the function for further data entry Numeric Value Numeric Format Theseareeit
131. eset to 19 if necessary CHECK OUT Turn on the 9835A and the 8350A The 9835A should undergo an internal memory test then display 9835A READY FOR USE on the CRT display The 8350A should also undergo a turn on self test consisting of the red LED numeric displays being blanked and all yellow indicator LED s on then the 8350A sweep controls are set to the instrument preset state Start Stop Sweep over the entire plug in frequency range fastest sweep time for plug in used typically 10 milliseconds and maximum leveled output power for the plug in If the 8350A fails the power up self test an error message will be displayed in the far left LED display Check section 8 of the 8350A Operating and Service Manual for error message decoding and diagnostics To verify that the HP IB connections and interface are functional perform the following on the 9835 1 Press lt t STOP or 2 Type REMOTE 719 3 Press EXAMPLE PROGRAM 1 Remote Local Local Lockout and instrument Preset Kov Veg Med HU IO AA NDAN AADI COLE RENN BE MAE Dr aa a P AT EIN Before programming the 8350A for different sweep functions the user should be aware of the extent of remote control that can be used The Remote Enable REMOTE command sets the 8350A into remote control from the local manual mode In remote the 8350 will perform only as its functions are programmed However if the LCL button is pressed the 8350A wi
132. esidual FM 100 Hz Must have auxiliary IF output when used with the HP 8901A Modulation Analyzer Spectrum Analyzer Dual channel HP 1740A X vs Y display mode Sensitivity 0 1 uS DIV Horizontal Sweep Rate lt 0 1 uS DIV Oscilloscope Compatible with HP 8755C Swept Ampli tude Analyzer and HP 8750A Storage Normalizer Display Mainframe HP 182T 180TR Capable of transmission measurements HP 8755 Power Resolution lt 0 25 dB DIV Swept Amplitude Analyzer Detector Compatible with Swept Amplitude Analyzer HP 11664A Frequency Range 0 01 to 12 4 GHz Power Range 20 to 10 dBm HP 11667A Frequency Range 0 01 to 12 4 GHz Output Port Tracking 50 25 dB Maximum Input Power 2 20 dBm Power Splitter HP 8750A Storage Normalizer Compatible with Display Mainframe and Swept Amplitude Analyzer HP 3455 Accuracy lt 0 005 Input Impedance 210 MQ Digital Voltmeter Frequency Mode HP 5328A Frequency Range 230 kHz Frequency Resolution lt 10 Hz Time Period Mode Frequency Range gt 20 kHz Resolution lt 50 uS Universal Counter Oscilloscope Probe 1 1 General Purpose Probe HP 10008B May be used in addition to Spectrum HP 8901A Analyzer Frequency Range Must cover auxiliary IF Output frequency of Spectrum Analyzer used Residual FM X10 Hz Modulation Analy
133. esktop Computer or the HP 85 Personal Computer is needed 1 63 EQUIPMENT AVAILABLE 1 64 Service Accessories 1 65 Service Accessory Kit HP Part Number 08350 60020 is available for servicing the 8350A and 83500 series RF plug ins The accessory kit includes Two 44 pin printed circuit board extenders The HP Part Number for each extender is 08350 60031 These boards have keyed slots which allow them to be used in trouble shooting the Model 83500 series RF Plug ins as well An RF Plug in extender cable set that provides all electrical connections when the RF Plug in is removed from the sweep oscillator The RF Plug in Interface Con nector is extended by one cable HP Part Number 08350 60034 and the Power Supply Interface connector is extended by the other cable HP Part Number 08350 60035 One hex Balldriver HP Part Number 8710 0523 Used to remove the hold down plate hex screws from the front panel when repair is necessary One 16 pin LC Test Clip HP Part Number 1400 0734 and one 20 pin LC Test Clip Part Number 1400 0979 are provided as an aid for probing Integrated Circuits when troubleshooting 1 66 Model 8410B 8411A Network Analyzer 1 67 The Model 8350A Sweep Oscillator is compatible with the HP Model 8410B Network Analyzer system The combination of the Model 1 9 General Information 8410B Network Analyzer the Model 8411A Frequency Converter and an appropriate displ
134. esponse due to the current front panel setting while channel 2 displays the response to the setting stored in memory location n The front panel controls of the 8350A are enabled and the current sweep setting may be altered if necessary Figure 11 Typical Test Setup Using 8755S Model 8350 Figure 12 8410B Network Analyzer 8410B NETWORK ANALYZER The 8350A is compatible with the 8410B Network Analyzer systems and accessories The Source Control Cable HP P N 08410 60146 synchronizes the two instruments to provide continuous multi octave coaxial magnitude and phase measurement capability from 110 MHz to 18 GHz with 65 dB dynamic range The frequency markers can be displayed in polar format as intensity dots Z axis Frequency markers derived from crystal oscillators allow frequency measure ments to be made with an accuracy of five parts per million Waveguide measurements between 18 and 26 5 GHz can be made with the K8747A Reflection Transmission Test Unit which is designed for use with the 8410B This test system utilizes two 8350A Sweep Oscillators and 83570A 18 to 26 5 GHz RF Plug ins One sweeper is used as a local oscillator while the second is used to sweep the desired frequency range See Figure 13 foran example measurement set up using the 8410B with a single 8350A and 83500 series Plug in The 8410B FREQ RANGE should be set to AUTO In addition the sweep time on the 8350A should be slow enough and or sweep range narrow en
135. et incorrectly the START STOP fre quencies will be in error Refer to Section II Installation of the Model 11869A Operating and Service Manual for instructions to properly set the identification switch 2 20 Internal Square Wave Modulation Frequency Selection 2 21 Internal square wave modulation 15 avail able at all sweep speeds on the Model 8350 Internal square wave modulation is selected by the front panel MOD pushbutton Modu 2 6 Rea pem de CD Coco CO CX C C Co CO Q GCOS CO C k e M p kk Address LSB Decimal Equivalent ooooc OO a O O O OO Cr CO gt w w Ore Mea eb 7 mM m O O O00 0 F beh m M RAM CO CO me me Que O Ma a CO CD CD CD m c lation frequency is selectable by an internal jumper to be either 27 8 kHz preset at the factory for use with Model 8755 Swept Amplitude Analyzer systems or 1 kHz Refer to Section V Adjustments in this manual for detailed infor mation on how to select and adjust the internal square wave modulation frequency 2 22 RF Plug in Configuration Switch 2 23 Each RF plug in may havea configuration switch which must be preset prior to operation in the Model 8350A This is a multiple switch with individual sw
136. eter that is presently active ie enabled for value modification from the step keys or data entry The units of the output data are Hz dBm dB or sec implied with the function selected OUTPUT STATUS The 8350A outputs 2 sequential bytes 8 bits wide that indicate the present instrument status The first status byte is equivalent to the Status Byte of the Serial Poll the Status Byte Message the second status byte is the Extended Status Byte which provides additional information See the Status Byte Information table for a description of each Status Byte Status Byte values are cleared upon execution of a Serial Poll the Status Byte Message Device Clear the Clear Message and or Instrument Preset function command Status Byte Information Table STATUS BYTE 1 pci cr e eg os pw ww DECIMAL 428 FUNCTION N A REQUEST SRQ on SRQ on SERVICE Change in Numeric RQS Extended Parameter Status Byte Altered to Default 7 128 EXTENDED STATUS BYTE 2 BIT o o DECIMAL FUNCTION Airflow RF Power N A Self Test Failure Unleveled Failure on Failed Bit Functions not usable with 86200 Series Plug ins and 11869A Adapter Figure 3 17 HP IB Only Functions 2 of 7 Model 8350 SERVICE REQUEST MASK This determines which bits within the 8350A Status Byte byte 1 can cause the 8350A to send a Request Service RQS Message to the HP IB controller The Request Mask is a one 8 bitb
137. f the Stop Frequency Line 80 Read the value into the 9835A and store it in the variable B Line 90 Print on the CRT display the present value of the Stop Frequency in MHz Line 100 Program the 8350A to output the present value of the Sweep Time Line 110 Read the value into the 9835A and store it in the variable T Line 120 Print on the CRT display the present value of the Sweep Time in milliseconds Line 130 Stops program execution Setup the equipment as in example 3 using the analyzers CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 9835A scratch the 9835 memory then type in the above program Run the program The 8350 will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following Adjust the 8350A toa preferred instrument state using the Start Frequency Stop Frequency and Sweep Time controls 2 Press The present values of the Start Frequency Stop Frequency and Sweep Time are sequentially interrogated and then printed on the CRT of the 9835 EXAMPLE PROGRAM 6 Stepped CV Sweep BSOS PELA TEE s wawawa NNN IEE ETE LE TLE RR ENTREE ASE Present automatic measurement systems typically make measurements at a sequence of CW test frequencies instead of analog sweeping the fre quency ra
138. fthe rear panel slots of the 9835A Verify that the rotary switch on top of the 98034A issetto 7 If notthensetitto 7 since this is the select code for the interface card for all programs found within this guide Connect the 24 pin HP IB connector of the 98034A to the rear panel 1 connector of the 8350A This connector is tapered to insure proper connection CAUTION Do not attempt to mate black metric threaded screws on one connector with silver English threaded nuts on another connector or vice versa as damage may result metric conversion kit which will convert one cable and one or two instruments to metric hardware is available by ordering HP Part No 5060 0138 98332 Figure 1 System Connection 6 All programs within this guide expect the 8350A HP 1B address to be decimal 19 The 8350A HP IB address switches are located inside the in strument and are factory preset to decimal 19 To execute a front panel Set HP IB Address which will display the present HP IB address Press The FREQUENCY TIME display will indicate the present decimal address To reset the number if 19 is not displayed This HP IB address will remain in effect until the instrument is powered off since the internal address switches are read at power on unless 8350A Option 001 Non volatile Memory is used Since Example 4 requires the 8350 tobe powered off then on the internal address switches should be r
139. g Valid Characters The alpha program codes can be either upper or lower case since the 8350A will accept either type they can be interchanged Spaces unnecessary signs leading zeroes and carriage returns CR are ignored Programming Data See Table 1 for Input Program ming Codes NOTE If using an 83500 Series Plug in that has Option 002 70 dB Step Attenuator the lifetime of the Step Attenuator will be reduced if using the Alternate Sweep function that alternates between two power levels using different Step Attenuator settings Likewise rapid power level programming between step attenuator settings can cause a similar problem Instrument Preset Instrument Preset turns off all functions then sets the following Sweep Mode Start Stop Start minimum specified frequency Stop maximum specified frequency Sweep Type Timed minimum sweep time Sweep Trigger Internal Vernier Offset set to 0 MHz Markers all values set to center of frequency span ail off Modulation Blanking Display Blanking on Frequency Step Size set to default value 10 of span Status Bytes cleared 83500 Series Plug ins Power Level maximum specified power switch selectable to minimum power Power Sweep Slope set to 0 dB RF CW Filter on enabled FM Sensitivity determined by internal switch Power Step Size set to default value 1 dB Crystal Markers 50 MHz off Instrument Preset does not affect Storage Registers HP IB
140. g Manual HP Part No 09845 91060 EQUIPMENT REQUIRED To perform all the example programs described in this programming note you will need the following equipment and accessories 1 HP 8350A Sweep Oscillator with any HP 83500 Series Plug in Note that an HP 86200 Series Plug in with the HP 11869A Adapter can be used but all references to power level and power control are not applicable OHEWLETT PACKARD 1980 HEWLETT PACKARD 2 HP 9845B Desktop Computer with SET UP 98412A 1 O ROM actually 2 ROM s b HP 98034A Revised HP IB Interface Card Cable Figure 1 shows the system connection and switch settings for the 98034A Interface and the 9845B Desktop Computer The following procedure com pletes the setup NOTE 1 Turn off the power to the 9845B The following equipment is not required for the programs to function but rather for a visual 2 Verify that the ROM s are installed in the 9845 display of the 8350A functions If not then install the ROM s in the appropriate side panel drawers of the 9845B 3 87555 Frequency Response Test Set with 3 Instalithe 98034A Interface Card into one ofthe 8755C Swept Amplitude Analyzer rear panel slots of the 9845B b HP 180TR or 182T Display Unit 4 Verify that the rotary switch on top of the a peed Or NOGA E 98034A is setto 7 Ifnotthen setitto 7 since d Two 120 cm 4 ft BNC cables 11170C this isthe select co
141. g The Status Bit Message 3 93 The 8350A does not respond to the Parallel Poll Enable PPE bus command and thus cannot send a Status Bit message 3 94 Receiving The Pass Control Message 3 95 The 8350A does not have the ability to take or pass control thus it cannot respond to the Pass Control message 3 96 Receiving The Abort Message 3 97 The 8350A responds to the Abort message IFC true by stopping all Talker or Listener functions Table 3 8 Status Byte Information EST BYTE X x DECIMAL VALUE FUNCTION REQUEST SERVICE RQS SRQ on Change in Extended Status Byte SRQ on Numeric Parameter Altered to Default EXTENDED STATUS BYTE 2 DECIMAL VALUE FUNCTION Airflow RF Power Failure Unleveled Failure on Bit Functions not usable with 86200 Series Plug ins and 11869A Adapter 19 Operating Information 3 98 OPERATOR S MAINTENANCE 3 99 Operator s maintenance consists of replac ing defective fuses cleaning the air filter and cleaning the plug in interface connectors These items are discused in the following paragraphs 3 100 Fuses 3 101 There are twelve fuses in the 8350A Only the ac line fuse located at the back of the instrument may be replaced by the Operator The value for the ac fuse is printed on the rear panel of the instrument below the power module The value and HP part number for the ac fuse may be found in Sections II Installation and IV Repl
142. ges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument HP does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or main tenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IM PLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HP SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSE QUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of t
143. ges which reperesent addresses program data measurements and status bytes The same data lines are used for input and output messages in bitparallel byte serial form Normally a seven bit ASCII code represents each piece byte of data leaving the eighth bit available for parity checking 3 27 Data transfer is controlled by means of an interlocked handshake technique which per mits data transfer asynchronously at the rate of the slowest device participating in that particular conversation The three data byte transfer control lines which implement the handshake DAV NRFD NDAC form the second set of lines 3 28 The remaining five general interface management lines form the third set and are used in such ways as activating all the connected devices at once clearing the interface allowing a device to request service etc 3 29 Definition of HP IB Terms and Concepts DEVICE A Able to talk listert and control ieg Calculator Abie to talk and Hsten DEVICE C Oniy able to listen DEVICE D Oniy abie fo talk ieg tape reader Model 8350A 3 30 The following list defines the terms and concepts that describe HP IB system operations Byte A unit of information consisting of 8 binary digits bits Device Any unit that is compatible with the IEEE Standard 488 1975 Device Dependent An action a device per forms in response to information sent on the HP IB The action is characteristic of an indi
144. h the OL program code the 8350A outputs a Learn String of 90 bytes in length This binary data string completely describes the present instrument state does not include the Storage Registers of the 8350A and 83500 Series Plug in The information is packed and encoded for minimal storage requirements thereby making data analysis difficult When stored in an ASCII character data 83590 Series Plug in Oniy string the Learn String can later be input to the 8350A to restore that instrument state See Input Data for Input Learn String information The length of the Learn String is fixed independent of the functions selected and the plug in used Format 90 8 bit bytes EOI Micro Learn String Selected with the OX program code the 8350A outputs a Micro Learn String of 8 bytes in length This binary data string completely describes the present CW frequency Vernier Sweep Output voltage and Power Level of the 8350A and 83500 Series Plug in The information is packed and encoded for minimal storage requirements thereby making data analysis difficult When stored in an ASCII character data string the Micro Learn String can later be input to the 8350A to restore that instrument state for rapid frequency programming See Input Data for Input Micro Learn String information Note the 8350A must be in CW mode and the CW Filter should be off when using this function The length of the Micro Learn String is fixed independe
145. he instrument is powered off since the internal address switches are read at power on unless 8350A Option 001 Non volatile Memory is used Since Example 4 requires the 8350A to be powered off then on the internal address switches should be reset to 19 if necessary CHECK OUT Turn on the 9845B and the 8350 The 9845B should undergo an internal memory test then display 9845B READY FOR USE on the CRT display The 8350A should also undergo a turn on self test consisting of the red LED numeric displays being blanked and all yellow indicator LED s on then the 8350A sweep controls are set to the instrument preset state Start Stop Sweep over the entire plug in frequency range fastest sweep time for plug in typically 10 milliseconds and maxi mum leveled output power for the plug in If the 8350A fails the power up self test an error message will be displayed in the far left LED display Check section 8 of the 8350A Operating and Service Manual for error message decoding and diagnostics a Before programming the 83504 for different sweep functions the user should be aware of the extent of To verify that the HP IB connections and interface are functional perform the following on the 9845B 1 Press CONTROL STOP or RESET 2 Type REMOTE 719 3 Press EXECUTE Verify that the REM light on the 8350A is lit If this fails verify that the 98034A select code switch is set to 7 the 8350A address switc
146. he variable A Line 2 Print on the internal strip printer the present value of the Start Frequency in MHz Line 3 Program the 8350A to output the present value of the Stop Frequency Read the value into the 9825 and store it in the variable B Line 4 Print on the internal strip printer the present value of the Stop Frequency in MHz Line 5 Program the 8350A to output the present value of the Sweep Time Read the value into the 9825 and store in the variable Line 6 Print on the internal strip printer present value of the Sweep Time in milliseconds Line 7 Stops program execution Set up the equipment as in example 3 using the analyzer s CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Resetthe 9825 erasethe 9825 memory then type in the above program Run the program The 8350 will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following 1 Adjust the 8350A to a preferred instrument state usingthe Start Frequency Stop Freuency and Sweep Time controls 2 Press CONTINUE on the 9825 EXAMPLE PROGRAM 6 Stepped CW Sweep Present automatic measurement systems typically make measurements at a sequence of CW test frequencies instead of analog sweeping the fre quency r
147. he 8350A to the 8755C 182T are made fora proper CRT display For the example measurement set the following front panel controls On the 8755C Channel 1 Display OFF press all the display push buttons so that they are all out Channel 2 Display robs deed aaa wena AUS da B Mcd peque 10 dB Reference Level 10 dB Reference Level Vernier OFF On the 182T or 180TR Magnifier r REC REOR Xo Ea X1 oL Ens ROV QU Ro DR TO NIS INT After connecting the equipment reset the 9835A scratch the 9835A memory then type in the above program Then run the program The 8350A will initially undergo an instrument preset which will set the proper powerleveling mode and sweep blanking signals Since the 8755C requires the RF signal to be modulated ata 27 8 kHz rate the internal amplitude modulation is enabled If using a 4 to 6 GHz Bandpass Filter as the test device the CRT display should reflect the filter transmission response over the 3 to 7 GHz range Two frequency markers of the Z Axis Intensity dot variety are set to 4 and 6 GHz hopefully within the passband or near the 3 dB points The setup can be modified by changing the values in lines 60 70 80 90 and or 100 then re run the program 83504 SWEEP OSCILLATGR 8755C 182T SWEPT AMPLITUDE ANALYZER 9835A DESKTOP COMPUTER 98034 POS Z 8LANK SWEEP GUT IN FRONT OR REAR tv AA ANS SC BI
148. her a single decimal digit a set of 14 characters or less representing a number or a string of binary bytes string of 14 characters maximum can be expressed in exponential decimal or integer form Acceptible numeric formats are referenced in further sections by the following format syntax d d d dEtdd Format 1 Exponential Format 2 Decimal Format 3 Integer d d Format 4 Single Digit d Format 5 Binary String b b Format 6 Binary Byte b Where the character d indicatesaleadingortrailing zero a space or a numeric digit 0 through 9 The character b indicates an 8 bit binary byte The characters indicate a variable number of the previous character Numeric values that are not binary in nature are scaled by the appropriate units terminator Units Terminator Suffix These are 2 character codes that terminate and scale the associated numeric value Frequency values can be entered in GHz MHz kHz or Hz Sweep time values can be entered in seconds or milliseconds Power values can be entered in dBm or GB If a units terminator is not passed and a Line Feed LF semicolon or comma is encountered the 8350A assumes the numeric value is in the fundamental units of Hz seconds or dB End Of String Message EOS This can be the ASCII characters Line Feed LF decimal 10 semicolon decimal 59 comma decimal 44 the bus EOI line true or another function code strin
149. hes are set to 19 and the interface cable is properly connected If the 9845B display indicates an error message it is possible that the above remote message was typed in incorrectly or the ROM s are not properly in stalled If the 9845B accepts the remote statement and the display is clear but the 8350A REM light does not turn on you could have a defective 98034A or 8350A Perform the operational checks as outlined in the respective Operating and Service Manuals to find the defective device PROGRAMMING EXAMPLES The following sample programs show the various ways of controlling the 8350A In remote control situations the 8350A Sweep Oscillator can interact with the system HP IB controller in two basic ways 1 Listen Mode Here the 8350A listens to the control commands as to modifying the present instrument state This effectively commands the 8350A to do a specific event much like setting a front panel function 2 Talk Mode Here the 8350A informs the controller of the present instrument state with a numeric value or a string of characters This effectively allows the userto interrogate orlearn any 8350A function Each programming example is structured using the following format A general description of the functions exercised The program listing explanation of each program line Detailed instructions for operating the program Wh EXAMPLE PROGRAM 1 Remote Local Local Lockout and Ins
150. his manual SAFETY CONSIDERATIONS GENERAL This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation This product has been designed and tested in accordance with inter national standards SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the instruc tion manual refer to Table of Contents Indicates hazardous voltages WE eim Indicates earth ground terminal The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruc tion of part or all of the product Do not proceed beyond a CAU TION sign until the indicated conditions are fully understood and met WARNING SAFETY EARTH GROUND This is a Safety Class I product provided with a protective earthing terminal An uninterruptible safety earth ground must be provided from the main power source to the product input wiring ter minals power cord or supplied power cord set Whenever it is likel
151. iliary output of a multi band plug in such as the 83592A 0 01 20 GHz the frequency multiplier feature of the 5343A may be used so that the proper RF frequency is displayed Model 8350A Model 8350A 8356A SWEEP 83500 5343A MICROWAVE FREQUENCY CONVERTER CNTR TRIG SWP INTFC A amp i STOP SWEEP SWP INTFCB Hes OUTPUT RF QUT OUTPUT A _ COUPLED DIRECTIONAL COUPLER Figure 15 5343 Test Setup Notes on connections power splitter or directional coupler may be used as long as the input to the 5343A does not exceed 7 dBm or go below the minimum sensitivity CNTR TRIG Counter Trigger Output for controlling the HP 5343A Microwave Frequency Counter This allows a frequency count of the selected marker START or STOP frequency of the present sweep Connects to the SWP INTFC A sweep interface on the rear panel of the 5343A to externally trigger the counter STOP SWEEP Input for stopping the progress of the forward sweep When connected to the SWP INTFC B sweep interface on the rear panel of the 5343A the 5343A stops the sweep long enough for the counter to gate and measure the selected frequency marker START or STOP frequency If the internal modulation on the 8350A is on it is momentarily disabled so that the counter may measure the frequency To measure a START STOP or marker frequency during a sweep 5343A Setto AUTO SWP M and set desired frequency resolution Set the rear panel
152. illator properly when sweeping octave multi octave bands The Model 8410B Source Control Cable connector pins and signals are illustrated in Table 1 3 of this manual 2 33 Operating Environment 2 34 Temperature The instrument may be operated in temperatures from 0 C to 55 2 35 Humidity The instrument may be operated in environments with humidity from 596 to 80 relative at 25 C to 40 However the instrument should also be protected from temper ature extremes which cause condensation within the instrument 2 36 Altitude The instrument may be operated at altitudes up to 4572 meters approxi mately 15 000 feet 2 37 Cooling Clearances for ventilation should be atleast 10 cm 4 inches at the rear of the cabinet and 7 6 cm 3 inches at the sides The clearances provided by the plastic feet in bench stacking and the filler strips in rack mounting are adequate for the top and bottom cabinet surfaces diagram illustrating the path for cooling airflow generated by the rear panel fan is given in Figure 2 8 Insure that the air intake and exhaust venting holes are not obstructed within the limits shown in Figure 2 8 2 38 RF Plug in Installation 2 39 To operate as a completely functional sweep oscillator the Model 8350A Sweep Oscil 2 10 Model 8350A lator must have an RF plug in unit installed To install an HP 86200 Series RF plug in coupled to a Model 11869A RF Plug in Adapter in the Model
153. ilures are detected during the self test or during operation of the 8350A they are indicated error codes in the form Ennn where n 0 9 read from the left FREQUENCY display For a complete description of the error code listing see the Operating and Service Manual Section 8 The error codes are E001 Plug in interface failure Check plug in E002 Sweep voltage DAC Marker voltage DAC failure E003 Tuning voltage DAC Marker voltage DAC failure Figure 1 Instrument Preset Key 1 of 2 Model 8350 Local Operation E004 Power supply failure E005 Instrument interface bus failure E006 Front panel bus failure E007 ROM failure E008 E009 E010 011 RAM failure E012 E013 E014 E015 Microprocessor failure E016 Insufficient cooling Check fan If the self test completes without errors the instrument presets to SWEEP MODE START STOP over full frequency range of plug in SWEEP TIME fastest allowable for plug in MARKERS off MODULATION off SWEEP TRIGGER SWEEP INT TIME VERNIER OFFSET 0 MHz DISPLAY BLANKING on SAVE RECALL Initial power on sets all memory locations to INSTR PRESET state if using 8350A Option 001 Non Volatile Memory or if instrument is already on the memory values remain unchanged when INSTR PRESET is pressed ALL OTHER FUNCTIONS When using 83500 series Plug ins POWER LEVEL maximum specified leveled value RF and CW FILTER on ALC MODE INT CRYSTAL MARKERS off 83522A 83
154. in Engineering and Manufacturing HP Part No 5952 0058 Condensed Description of the Hewlett Packard Interface Bus HP Part No 59401 90030 3 24 General HP IB Description 3 25 The HP IB 1 a parallel bus of 16 active signal lines grouped into three sets according to function to interconnect up to 15 instruments Figure 3 5 is a diagram of the interface connec tions and bus structure Table 3 3 defines the function of each signal line Table 3 3 The Bus Signals we Data Input Output The eight data lines for the byte of data Data Valid Indicates the data lines have a valid byte of data Not Ready for Data Indicates that the listening devices are not ready to accept further data Not Data Accepted Indicates that the listening devices have not completely accepted the present byte of data Attention Enables a device to interpret data on the bus as a controller command command mode or data transfer data mode Interface Clear Initializes the HP IB system to an idle state no activity on the bus Service Request Alerts the controller to a need for communication Remote Enable Places instruments under remote program control End Or Identify Indicates last data transmission during a data transfer sequence used with ATN to poli devices for their status Operating Information 3 26 Eight signal lines form the first set and are termed data lines The data lines carry coded messa
155. ing and Service Manual HP Part No 08350 90001 For information on operating the 85A the following references are available 85A Owner s Manual and Programming Guide HP Part No 00085 90002 85A Programming Guide HP Part No 00085 90142 HEWLETT PACKARD EQUIPMENT REQUIRED To perform all the example programs as described in this programming note you will need the following equipment and accessories 1 8350A Sweep Oscillator with any HP 83500 Series Plug in Note that an HP 86200 Series Plug in withthe HP 11869A Adapter can be used but all references to power level and power control are not applicable 2 HP 85A Personal Computer with a HP Part No 00085 15003 ROM b HP 82936A ROM Drawer HP 82937A HP IB Interface Card Cable HP INTERFACE BUS Al ir BK or IgE is 5 ig in i 8350A 83500 PLUG IN NOTE The following equipment is not required for the programs to function but rather for a visual display of the 83504 functions 8755S Frequency Response Test Set with 8755C Swept Amplitude Analyzer b HP 180TR or 182T Display Unit HP 11664A or 11664B Detector d Two 120 centimetre BNC cables HP 11170C variety or any appropriate Oscilloscope with Crystal Schottky Detector Attenuator and Cabling Any test device over the frequency range of the 83500 Series Plug in moca 090000000 13000222002002000 2070
156. ion 004 plug ins SERIAL PLATE and Option label HP INTERFACE BUS input output connector allows interface with other instrument or controllers POS Z BLANK output connector provides positive 5V retrace and bandswitch blanking and nega tive intensity Marker Z axis Modulation signals for external display CNTR TRIG Counter trigger output connector when used with STOP SWEEP with appropriate frequency counter SWP INTFC B to stop the for ward sweep long enough to take a frequency count NEG Z BLANK output connector provides retrace 5V and bandswitch blanking Z axis modulation signals for external displays PEN LIFT output connector provides an open col lector output to the remote penlift coil of an X Y recorder SWEEP OUT IN connector parallels front panel SWEEP OUT IN connector Provides and accepts sweep signal FM INPUT connector passes signal thru to plug in for frequency modulation or phase lock error signal inputs PROGRAMMING CONNECTOR provides digital control of external display functions and sweeper control in Description in out Logic Marker Pulses output TTL Pen Lift Request input Sweep Alternate output TTL Stop Fwd Swp input TTL 5 volts output TTL 100 ma Max 1 RF Blanking output TTL 8 RF Blank Request input TTL 9 Ext Trig Input input TTL 10 Pen Lift output 11 Recorder Mute output TTL 12 13 14 Blanking Pulse output TTL 15 M
157. is subsection provides Local non HP IB operating infor mation arranged by function This subsec tion also contains information on locally interfacing with the following test equipment 87555 Frequency Response Test Set HP 8410B Network Analyzer HP 7010B and other X Y Recorders e 5343A Frequency Counter PROGRAMMING NOTES Programming Notes are individual publications documenting Operation the HP IB use of the sweep oscillator The following programming notes are included in this section Introductory Operating Guide for use with the HP 9825A B Introductory Operating Guide for use with the HP 9835A Introductory Operating Guide for use with the HP 9845A Introductory Operating Guide for use with the HP 85A Quick Reference Guide Contact your local sales office for copies of other Programming Notes as they become available This section also includes a blue service tag page If sweep oscillator service is required remove one of the tags and fill in as much information as possible Attach this tag to the sweep oscillator to aid in servicing and reduce turn around time OPERATING INFORMATION 8350A SWEEP OSCILLATOR HEWLETT PAONARD HEWLETT PACKARD 8350 SWEEP OSCILLATOR Copyright HEWLETT PACKARD COMPANY 1980 1400 FOUNTAIN GROVE PARKWAY SANTA ROSA CALIFORNIA 95404 MANUAL PART NO 08350 90001 Microfiche Part No 08350 90002 Printed AUGUST 1986 O HEWLE
158. itch may be controlled or programmed remotely via the rear panel HP IB interface connector The Model 8350A can also output to a controller an instrument state message that com pletely describes the current instrument status sweep mode trigger mode etc and can supply the present numerical value of any function sweep time marker frequencies power levels START STOP frequencies etc 1 41 Other Features 1 42 The Model 8350A also provides RF output blanking during sweep retrace and rear panel positive and negative polarity display blanking outputs for retrace and bandswitching points of sweep rear panel PEN LIFT output generates a pulse which is coincident in time with the end points of the sweep COUNTER TRIGGER output and STOP SWEEP inputare also available on the rear panel to interface with the HP Model 5343A Microwave Frequency Counter 25 pin rear panel Programming Connector provides additional control of and information on the Model 8350A instrument state A listing of pin configuration and signals on the Programming Connector is given in Figure 2 7 Output signals on the Programming Connector supplement other rear panel output signals such as display and RF blanking X Y recorder penlift and HP Model 8410B and HP Model 5343 interface signals Input signals on the Programming Con nector affect the sweep status display and RF blanking penlift outputs etc 1 8 Model 8350A 1 43 To have a complete oper
159. itches that correspond to various 8350 Installation HP IB CONNECTOR J4 as viewed from rear of instrument 0101 0105 0102 1 0106 0103 0107 0104 1 0108 LEIO LREN P 0 TWISTED PAIR WITH 6 P O TWISTED PAIR WITH 7 GROUNDED NEAR x W TERMINATION LNDAC P O TWISTED PAIR WITH 8 OF OTHER WIRE LIEG P O TWISTED PAIR WITH 9 OF TWISTED PAIR LSRO P 0 TWISTED PAIR WITH 10 LNRFD G Ub Qo N o LATN TWISTED PAIR WITH 11 SHIELD SIGNAL GROUND CONNECTED TO EARTH GROUND HP IB Logic Levels True low State lt 0 8 False high State 242 4 Vde eem deme LOW Attention control line LOW Data Valid Control line L thru 8 LOW Data Input Output lines L EOI LOW End Or Identify control line L IFC LOW Interface Clear control line L NDAC LOW Data Not Accepted control line L NRFD LOW Not Ready For Data control line L REN LOW Remote Enable control line L SRQ LOW Service Request control line Figure 2 5 Connector Signals and Pin Configuration Installation plug in functions such as FM sensitivity selection FM input coupling selection direct coupled or cross over RF power level at instrument power on and Option 002 Step Attenuator operation Refer to the Operating and Service Manual of the specific RF plug in used for detailed information on the configuration switch 2 24 Interconnections 2 25 Thereare two RF plug in
160. ity of the inter rogate function PROGRAM 5 TETRA FNS TATE LE BAST TTR SEINS TIS AEST TO TSA SN TTT I ESSAIS PROGRAM 5 EXPLANATION Line 10 Setthe 8350Atoa predefined instrument state via instrument preset and enable the square wave modulation Line 20 Return the 8350A to local control Line 30 Temporarily stops program execution Line 40 Program the 8350A to output the present value of the Start Frequency Line 50 Read the value into the 85 and store itin the variable A Line 60 on the internal printer the present value of the Start Frequency in MHz Line 70 Program the 8350A to output the present value of the Stop Frequency Line 80 Read the value into the 85 and store it the variable B Line 90 Print on the internal printer the present value of the Stop Frequency in MHz Line 100 Program the 8350A to output the present value of the Sweep Time Line 110 Read the value into the 85 and store itin the variable T Line 120 Print on the internal printer the present value of the Sweep Time in milliseconds Line 130 Stops program execution Setup the equipment as in example 3 using the analyzers CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 85A scratch the 85 memory then type in the above program Clear the 85A CRT display then run the program The 83
161. ive device PROGRAMMING EXAMPLES The following sample programs show the various ways of controlling the 8350 In remote control situations the 8350A Sweep Oscillator can interact with the system 1 controller in two basic ways 1 Listen Mode The 83504 listens to the control commands as to modifying the present instru ment state This effectively commands the 8350A to do specific event much like setting a front panel function 2 Talk Mode The 8350A informs the controller of the present instrument state with a numeric value or a string of characters This effectively allows the userto interrogate orlearn any 8350A function Each programming example is structured using the following format 1 Ageneral description of the functions exercised 2 A program listing 3 An explanation of each program line 4 Detailed instructions foroperatingthe program A complete summary of all the 8350A 1 program codes is provided at the end of this note EXAMPLE PROGRAM 1 Remote Local Local Lockout and Instrument Preset Before programming the 8350 for different sweep functions the user should be aware of the extent of remote control that can be used The Remote Enable rem command sets the 8350A into remote control from the local manual mode In remote the 8350A will perform only as its functions are pro grammed However if the LCL button is pres
162. k is that the numeric display will not indicate the present frequency The 8350A provides a Display Update On Off function and it can be implemented by modifying line 10 to be OUTPUT 719 IPMD1FIODUO Then re run the modified program using the same operation steps as above Certain error conditions of the 8350 can be detected by the 9835A sothat corrective action can be taken Examples of some detectable error condi tions are RF power unleveled numeric data entry out of range and line power failure If an error condition exists the user can instruct the 8350A to request service from the 9835 by initiating a Service Request SRQ The 9835A can detect whether an SRQ has taken place on the bus by analyzing bit 7 see note below of the Status Byte of the 98034A HP IB Interface Two modes are avail able for analyzing the 98034A Status Byte 1 periodically read the Status Byte or 2 enable bit 7 to interrupt the program when it is set In either case once it is determined that the 8350A has requested service the specific error condition s can then be determined by reading and analyzing the Status Bytes of the 8350 The 8350 has two Status Bytes each consisting of 8 bits with each bit indicating the present status of a particular function or condition See Table 1 for a complete description of the conditions associated with each Status Byte bit The user can analyze these Status Bytes for every SRQ more simply in
163. ker Off A1 Internal Leveling M1 Marker 1 A2 External Crystal Leveling M2 Marker 2 A3 External Power Meter Leveling M3 Marker 3 BK Backspace M4 e 4 CAm Amplitude Crystal Marker On Off 83522 nt Marker 5 83525 Only NT Network Analyzer Trigger 8410B CF Center Frequency OA Output Active Parameter Intensity Crystal Marker On Off 83522 1 oL Output Learn String 83525 Only OM Output Mode String CW CW Frequency Output Interrogated Parameter C1 1 MHz Crystal Marker Frequency 83522 Output Status Bytes 83525 Only OX Output Micro Learn String C2 10 MHz Crystal Marker Frequency 83522 PL Power Level 83525 Only C3 50 MHz Crystal Marker Frequency 83522 5 Power Sweep On Off 83525 Only RCn Recall Register C4 External Crystal Marker Frequency 83522 RFm RF Power On Off 83525 Only RM Service Request Mask DF Delta F Frequency Span RS Reset Sweep EM dem SC Seconds DN Step Down Decrement SH Shift Function Display Blanking On Off SLm Slope On Off DUm Display Update On Off SM Manual Sweep E Exponent Power Of 10 55 Step Size FA Start Frequency ST Sweep Time EB Stop Frequency SVn Save Register Fim CW Filter In Out SX External Sweep GZ GHz TS Take Sweep HZ Hz T1 internal Sweep Trigger 12 Line Sweep Trigger IL Input Learn String T3 External Sweep Trigger IP Instrument Preset 4 Single Sweep IX Input Micro Learn String KZ KHz UP Step Up Increment MC Marker To Center Frequency VR CW Verhier MDm Square Wav
164. l and marker frequencies for a test measurement This program sets up the sweeper for a general purpose situation using several dedicated format statements Note that not all parameters need to be reprogrammed every time NOTE This program expects an 83500 Series Plug in that covers the frequency range of at least 3 to 7 GHz if using a plug in with a different frequency range change the values lines 5 8 and 9 to the appro priate values If using an 86200 Series Plug in then do not enter Line 6 PROGRAM 3 PROGRAM 3 EXPLANATION Line 0 Format statement for setting the Start and Stop Sweep frequencies in GHz Line 1 Format statement for setting the Sweep Time in milliseconds Line 2 Format statement for setting a Frequency Marker by marker number and frequency in GHz Line 3 Format statement for setting the Output Power Level in dBm Line 4 Preset the sweeper to a known state via instrument preset and enable the internal 27 8 kHz Square Wave Amplitude Modulation RSEN RANTS GU tm Tn trigo ISS TSN IN ETON TENDIT MO Line 5 Set a Start Stop Sweep of 3 0 to 7 0 GHz Line 6 Set the Sweep Time to 50 msec Line 7 Set the Output Power Level to 10 dBm Line 8 Set Marker 1 to 4 GHz Line 9 Set Marker 2 to 6 GHz then stops program execution Set up the equipment as shown in figure 2 by adding the 8755C the 180TR or 182T the 11664 andatest device like a 4 to 6 GHz Band
165. l appear to be unchanged however the 7 0 lamp will be on indicating the offset is present and the actual RF output frequency will be shifted To return display or adjustment the frequency offset press SHIFT VERNIER To zero the offset press SHIFT VERNIER 0 MHz OVERRANGE The 8350A will permit frequency sweeps beyond the specified range of the plug in by 2 0 of the plug in bandwidth However plug in performance in the overrange condition is unspecified As a warning of the frequency overrange condition the GHz or MHz annunicator will flicker in the appropriate function display Figure 3 Frequency Controls 2 of 2 Local Operation Model 8350A 2 0006 FREQUENCY TIME This display will read either GHz MHz or sec depending upon the presently active function and range This section controls five mainframe markers manual sweep and the sweep time The five independent frequency markers can be displayed simultaneously as intensified dots on a CRT using the Z axis or amplitude dips on the RF output SWEEP Controls the rate at which the RF output is swept TIME When the TIME key is pressed the output is swept at the user specified or default rate If time key is lit but display reads GHz MHz or is blank press TIME key again and display will read seconds The mainframe can allow sweep times from 100 seconds to 0 01 second although the minimum sweep time is dependent on the plug in being u
166. l num ber prefix that is not listed on the title page or in the Manual Changes Supplement contact your nearest Hewlett Packard Sales Service Office 1 19 DESCRIPTION 1 20 The Hewlett Packard Model 8350A Sweep Oscillator together with an RF plug in unit forms a complete solid state swept signal source The Model 8350A can be used with network analyzer systems such as the HP Model 8410B Network Analyzer the HP Model 8755 Frequency Response Test Set and the HP Microwave Link Analyzers to provide a complete measurement system 1 21 The front panel of the Model 8350A has been conveniently laid out to optimize the use of instrument operation function blocks Frequency modes sweep modes marker operation storage register control and data entry controls are individually grouped for ease of operation and full control versatility on the Model 8350A Sweep Oscillator 8350 1 22 Upon initial turn on or after the INSTRument PRESET pushbutton 1 selected the instrument automatically goes through an internal self check routine to verify proper instru ment operation If certain errors or failures are detected during the self test or in normal operation they are indicated via error codes displayed on the far left digital display An INSTRument PRESET condition is then set which automatically presets the sweep oscillator to full RF plug in band sweep operation 1 23 Accurate High Resolution Data Entry 1 24 Accura
167. lashing other lamps off s MS Note M5 lamp flashing M3 lamp on and other lamps off Marker SWEEP In this mode the RF output is swept between markers 1 and 2 The lamp over the key will be on Marker 1 must be less than or equal to Marker2 in frequency if is greater than M2 the values of M1 and M2 are permanently interchanged By varying the active marker 1 or 2 or by turning the START STOP controls the sweep limits can be altered When both M1 and M2 are not on the sweep occurs between the most recent values of MI and 2 To exit this mode press MKR SWEEP and the lamp over the key will go out Pressing SHIFT SWEEP causes the values of M1 and M2 to become the START STOP frequency values permanently Figure 4 Frequency Time Controls 2 of 3 Model 8350A Local Operation MARKER TO CENTER FREQUENCY MKR CF When this key is pressed the frequency of the active marker becomes the center frequency ofthe sweptoutput The frequency span remains unchanged if within the frequency limits of the plug in If original frequency span exceeds plug in limits the frequency span will be reduced to retain symmetry MKR A This function allows tiie frequency difference between any two markers to be displayed and the trace between them intensified if intensity markets are selected 1 Press SHIFT the display shows the frequency difference between the currently active marker and the one that was previou
168. lay Blanking On Off SLm Slope On Off DUm Display Update On Off SM Manual Sweep E Exponent Power Of 10 SS Step Size FA Start Frequency ST Sweep Time Fim CW Filter In Out SX External Sweep GZ GHz TS Take Sweep HZ Hz T1 Internal Sweep Trigger 12 Line Sweep Trigger IL Input Learn String T3 External Sweep Trigger IP Instrument Preset TA Single Sweep IX Input Micro Learn String KZ KHz UP Step Up Increment MC Marker To Center Frequency VR CW Vernier MDm Square Wave Amplitude Modulation On Off MO Marker Off MPm Marker 1 2 Sweep On Off MS Milliseconds 0 9 Acceptable Numeric Data NOTES Program codes of the form XXm use m to turn the function On or Off 1 or 0 For the storage register functions the n is 1 through 9 2 The 83504 ignores spaces plus signs negative signs except for vernier offset and power values and any unexpected characters Program codes can be upper or lower case alpha characters For more information call your local HP Saies Office or nearest Regional Office Eastern 201 265 5000 Midwestern 312 255 9800 Southern 404 955 1500 Western 213 970 7500 Canadian 418 678 9430 Ask the operator for instrument sales Or write Hewlett Packard 1501 Page Road Palo Alto CA 94304 In Europe Hewlett Packard 7 rue du Bois du Lan Box CH 1217 Meyrin 2 Geneva Switzerland in Japan Yokogawa Hewlett Packard Ltd 29 21 Takaido Higashi 3 chome Suginami ku Tokyo 168 5952
169. le viathe FREQUENCY TIME knob step keys keyboard or remotely If in intensity marker mode the display trace is intensified between the two selected frequency markers Marker to Center Frequency This function takes the value of the presently active frequency marker and reassigns it to the CW frequency Center Frequency or effective center frequency of the Start Stop sweep The frequency marker value is unchanged the previous center frequency value is lost Figure 3 8 Frequency Markers Sweep Time Marker Transfer 1 of 4 26 Model 8350 Marker Sweep This function temporarily uses the values of Markers 1 and 2 and reassigns them to the Start and Stop frequencies respectively The previous values of the Start and Stop frequencies are saved and reassigned when exiting Marker Sweep mode If Marker 1 is greater than Marker2 or M2 less than M1 the lower frequency is used for the Start frequency and the higher value for the Stop frequency Note that the values of Markers 1 and 2 and hence the temporary Start and Stop frequency values can be modified in marker sweep mode by using either the start or the stop controls or or M2 controls The new values of and M2 are retained upon exiting Marker Sweep mode _ Marker 1 to Start Marker 2 to Stop This functions the same as marker sweep except that the Start and Stop frequencies are permanently reassigned and not restorable to their previous values Counter Interface Enable and Dis
170. ll return from the remote state Verify that the REM light on the 8350A is lit If this fails verify that the 980344 select code switch is set to 7 the 8350A address switches are set to 19 and the interface cable is properly connected If the 9835A display indicates an error message it is possible that the above remote message was typed in incorrectly or the ROM s are not properly installed If the 9835A accepts the remote state ment and the display is clear but the 8350A REM light does not turn on you could have a defective 98034A or 8350A Perform the operational checks as outlined in the respective Operating and Service Manuals to find the defective device PROGRAMMING EXAMPLES The following sample programs show the various ways of controlling the 8350A In remote control situations the 8350A Sweep Oscillator can interact with the system 1 controller in two basic ways 1 Listen Mode The 8350A listens to the control commands as to modifying the present instrument state This effectively commands the 8350A to do a specific event much like setting a front panel function 2 Talk Mode The 8350A informs the controller of the present instrument state with a numeric value or a string of characters This effectively allows the user to interrogate or learn any 8350A function Each programming example is structured using the following format 1 Ageneral description of the functions exercised 2 The program li
171. lue RF CW Filter on ALC MODE INT CRYSTAL MARKERS off 50MHz lamp on Figure 3 7 Instrument State 1 of 2 24 Model 8350A Operating Information REMOTE Sets Sweep Oscillator into remote HP IB operation LIMITATIONS CONCERNS Local key will not function if a Local Lockout has been implemented Allowable HP IB addresses are from 0 thru 30 However the value 21 1s typically reserved for the controller and should be avoided The HP IB address set remains in effect until line poweris turned off At power turn on the internal HP IB address switches are read and used as the address unless 8350A Option 001 is used If Option 001 is used the HP IB address will remain unchanged If an instrument problem occurs Section 8 of the manual contains some operator initiated tests These tests may 1solate problems to enable service via blue tag to repair them faster LOCAL FUNCTION PROCEDURE Function Activate and On Off Keyboard esolution Instrument Preset l Address entered only after pressing the GHz MHz or dBm keys Select HP IB Address Integers from 0 to 30 REMOTE FUNCTION PROCEDURE ram Resolution Local Use HP IB Command Select HP IB Address Not Available Instrument Instrument Preset Preset Remote Use HP IB Command Figure 3 7 Instrument State 2 of 2 25 Operating Information Model 8350A FREQUENCY Markers Sweep TIME Marker Transfer DESCRIPTION Th
172. m The 8350A will initially undergo an instrument preset which will set the proper power leveling mode and sweep blanking signals Since the 8755C requires the RF signal to be modulated at a 27 8 kHz rate the internal amplitude modulation is enabled If using a EXAMPLE PROGRAM 4 Learning An Instrume SOTA Being able to save a specific instrument state is helpful when it is needed several times in a test or measurement procedure The user could save the instrument state by manually logging the important sweep parameters such as frequency range power level ALC modes etc then re inputting them at the appropriate time A somewhat simpler approach is to save the instrument state in one of the 8350A internal storage registers then recall it when needed However this is nota permanent solution unless the 8350A Non volatile Memory option Option 001 is used A more permanent solution is to use the Output Learn String function of the 8350A so that the 9845B can learn then store a data string that describes the present instrument state on a tape cartridge or in its internal memory Once an instru ment state is stored or learned the 8350A can then be restored to that state using the Input Learn String function The power of these instrument Learn Teach functions are demonstrated by the following program using the 9845B fast data transfer function 4 to 6 GHz Bandpass Filter as the test device the CRT display should reflec
173. message terminates all bus communications but does not implement the Clear message This message can also be used by a controller to specify the particular bit and logic level that a device will respond with when a parallel poll operation is performed Thus more than one device can respond on the same bit summary of the twelve bus messages their related commands and mnemonics are pro vided in Table 3 4 11 Operating Information 1 Message Appii Local Lockout Clear Lockout Set Local Require Service 12 Model 8350 A Table 3 4 The Twelve Bus Messages 1 of 2 83504 Response Input data controls ali front panei functions except the Line switch plus special HP IB only functions Output data includes information as to present instrument state values of selected functions and the instrument status Responds by triggering a sweep if and only if in the single sweep trigger mode Clears the instrument status byte and the extended status byte Removes the 8350A from local front panel control to remote HP IB control Al functions remain the same as in local and the keyboard is non responsive except the LOCAL key Removes the 8350A from re mote 1 control to local front panel control func tions remain the same asin the remote state Functions the same as the remote message exceptthat the entire front panel is disabled including
174. mplitude Amplitude Marker On AKI Markers Amplitude Marker Off AKO Display Blanking On DPI Display Blanking Off DPO Blanking RF Blanking On RPI RF Blanking Off RPO ver Modulation On MDI oculation Lf Modulation Off MDO Figure 3 12 Modulation Blanking 2 of 2 37 Operating Information Model 8350A POWER Control DESCRIPTION This function block contains all functions relating to the RF output power level The desired power level can be set To compensate for a linear lose through a device like a cable on the output of the plug in a slope compensation can be set to level the output To provide a ramp of output power a power sweep width can be set and the Power Sweep function enabled Power Sweep starts the RF output power at the Power Level setting then ramps up the specific Power Sweep width PANEL LAYOUT ing dB GHz C UNLEVELED E SWEEP LEVEL FUNCTIONS INDICATORS POWER LEVEL This function when enabled light on allows setting of the output power level for all ALC modes Calibrated power level in internal leveling mode only POWER SWEEP This function when enabled light on allows setting of the power sweep width in dB for the power sweep function Power Sweeps from Power Level to Power level plus Power Sweep width SLOPE This function when engaged light on allows setting of the frequency slope compensation in dB GHz Allows compensation for lossy devices to achieve a flat leveled
175. n Marker Pulse Request Retrace Alternate Sweep Enable Stop Sweep Request Digital Ground Bianking Pulse Request Counter Trigger Step Up Advance Inverse Pen Lift 8410 Ext Tngger Figure 16 Rear Panel Connections 25 Local Operation 26 APPENDIX 2 86200 SERIES PLUG INS WITH 11869A ADAPTER Figure 17 Connecting 11869A Adapter to 86200 series Plug in Although designed for the 8620 Sweep Oscillator the 86200 series RF Plug ins can beused in the 8350A Sweep Oscillator with the addition of the 11869A Adapter The 11869A Adapter provides the electrical and mechanical interface between the 8350A and an 86200 series Plug in A switch on the 11869A allows the user to select the appropriate interface code from the code listing on the adapter so that an 86200 series Plug in can be used in the 8350 Allofthe standard performance and control of the 8350 is available when using an 86200 Plug in with the 11869A Adapter However plug in functions e g output power RF on off plug in markers will not be programmable and will not respond to keyboard and step keys On the rear panel of the 11869A Adapter are several hole plugs that allow connections to be made to the back panel ofthe plug in 11869A Option 004 provides two semi rigid cables to allow connection of 86200 series rear panel RF output to 11869A rear panel Special Plug ins Plug ins with Option HXX When using 86200 series Plug ins that have been factor
176. n 8350A is in MAN or TIME sweep mode 0V output is at the start frequency of sweep 10V output is at the stop frequency of sweep In CW mode the output is a dc voltage proportional to the percent of full band Can be used to drive the X axis on a CRT or X Y recorder SWP Sweep INPUT Used when in EXT SWEEP mode Supplying a dc voltage will tune RF where 0 volts tunes to the lower frequency of the set sweep and 10 volts tunes to the upper frequency The input can be a ramp for a swept output or DC for a CW frequency The display and RF blanking must be off when externally sweeping Figure 6 Display Function Keys Model 8350A Model 8350A Local Operation AE 090 20000 DQO 83500 SERIES PLUG IN Power Control POWER LEVEL When pressed the plug in display indicates the RF output power The output power may be varied using the POWER control keyboard or step size keys Note thatthe internal leveling must be on and the unleveled light out for calibrated output power The power is typically calibrated over a 15 dB range 80 dB with plug in Option 002 Step Attenuator SLOPE Compensates for high frequency power losses in external RF cables by increasing the power at higher frequencies This compensation provides a flat RF signal output at the end ofa cable or test set Press SLOPE and the display will indicate the dB per GHz ofthe present sweep of compensation desired Use the POWER control keyboard or step keys to enter th
177. n MKR CF is engaged it will automatically scale down the A Frequency to be within plug in frequency range 9 The plug in and markers have the capability of 2 percent frequency overrange if this occurs a flickering of the GHz or MHz indicators will occur Figure 3 8 Frequency Markers Sweep Time Marker Transfer 2 of 4 Operating Information 27 Operating Information LOCAL FUNCTION PROCEDURE Data Forms Function Activate Marker to Center Frequency Marker Sweep Permanent Marker Sweep Turn Off Active Marker Turn Off All Markers Counter Interface function Enable SE Counter Interface Disable Values must end with terminator GHz or MHz Figure 3 8 Frequency Markers Sweep Time Marker Transfer 3 of 4 28 Model 8350A Range and Resolution See plug in Resolution 024 of band Model 8350 Operating Information REMOTE FUNCTION PROCEDURE Program Code Function Lm e em s se Select and Active Marker MC MARKER Sweep ON SWEEP MI and M2 OFF MARKER Permanent SWEEP Marker Sweep SME ALL OFF All Markers Off Counting End Points or Marker Swept Frequency Displays Difference Frequency Counter Interface Enable Figure 3 8 Frequency Markers Sweep Time Marker Transfer 4 of 4 29 Operating Information Model 8350A Storage Registers DESCRIPTION The Save n function allows all
178. nd ATN true with the last byte The Interrogate and Active func tions send a Data message consisting of a 14 character ASCII string representing the numeric value and terminated with a Carriage Return Line Feed CR LF 3 69 Binary Syntax b b EOI 3 70 Numeric Syntax d dddddE dd CR LF 3 7 The character b indicates an 8 bit binary byte and d indicates a decimal digit 0 through 9 The Characters indicate a variable number of the previous characters Note that the binary output format could have bytes that could be misinterpreted as Carriage Returns and or Line Feeds so the user should defeat the ASCH CR LF as a valid character string terminator 3 72 Receiving The Trigger Message 3 73 The 8350A responds to the Group Execute Trigger GET command to the HP IB bus select code and a Selective Device Trigger to the 8350A HP IB address The effect of the GET command is to trigger the sweep if presently in the External Sweep Trigger mode only otherwise no action is taken The response is as if a Data message consisting of the Single Sweep Trigger T4 program code were transmitted 3 74 Receiving The Clear Message 3 75 The 8350A responds to both Device Clear DCL and Selective Device Clear SDC by resetting all HP IB handshake lines to the inactive state The effect is to remove the 8350A from any Talker or Listener control functions The 8350A responds by clearing the Status Byte and the Extended Status
179. nd is selectable by the user from 0 to 30 Refer to Table 2 3 for a listing of HP IB address codes HP IB Functions Input Mode Functions All front panel controls except the ac power line switch are pro grammable Functions that require numerical values typically have greater entry resolution than is displayed Several special HP IB functions are provided that are not available from the front panel Frequency Resolution Same as CF AF plus vernier Power Resolution Refer to RF plug in unit specifications Output Mode Functions The 8350A can output to a controller an instrument state message that completely describes the present instrument status sweep mode trigger mode etc and can supply the present numerical value of any function sweep time marker frequencies power levels start stop frequencies etc GENERAL Nonvolatile Memory Option 001 Continuous memory that retains the contents of all instrument state storage registers and the HP IB address along with the current instrument state when the ac power is turned off for approximately 20 days Display Blanking Outputs POS Z BLANK Direct coupled rectangular pulse approximately 5 volts during retrace and bandswitch points of sweep Intensity marker signals are also output through this rear panel BNC connector Marker signals are 4 volt pulses with the exception of the active marker which is 8 volts NEG Z BLANK Direct coupled rectangular pulse appro
180. nd it passes data to the 8350A Note that the 8350A LCL key produces the same result as programming LOCAL 719 or LOCAL7 Be careful as the latter command places all instruments on the HP IB in local state as opposed to the 8350A alone EXAMPLE PROGRAM 2 r XX To program any function on the 8350A the con troller must pass specific program codes and data to the sweeper The statement that allows this is the Output OUTPUT statement The alphanumeric data string of the output statement can be a conca tenation of character strings and or variables The data can be specific codes free field formatted data or reference a specific image IMAGE statement For example to program the CW Frequency CW one program code sequence is CW followed by the frequency in GHz then GZ If the frequency is to be 7 555 GHz then the string CW7 555GZ will suffice However if the frequency were to change then a variable F could indicate the frequency in GHz and the program string could be CW F GZ Using an image statement also allows a specific number of digits to be passed thereby avoiding any unexpected round off errors NOTE This program expects an 83500 Series Plug in that covers the frequency 7 555 GHz if using a plug in that does not cover this frequency then the value in lines 20 and 30 should be changed to an appropriate value PROGRAM 2 PROGRAM 2 EXPLANATION Line 1
181. nd second it passes data to the 8350A Note that the 8350A LCL key produces the same result as programming LOCAL 719 or LOCAL7 Be careful as the latter command places all instruments on the HP IB in local state as opposed to the 8350A alone LTRS TASTES PEREAS KITEEN ARTIA REM CW one program code sequence is CW the frequency in GHz GZ If the frequency is to be 7 555 GHz then the string CW7 555GZ will suffice However if the frequency were to change then a variable F could indicate the frequency GHz and the program string could be CW F GZ Using an image statement also allows a specific number of digits to be passed thereby avoiding any unexpected round off errors This program expects an 83500 Series Plug in that covers the frequency 7 555 GHz If using a plug in that does not cover this frequency range then the value in lines 30 and 40 should be changed to an appropriate value PROGRAM 2 PROGRAM 2 EXPLANATION Line 10 Puts the 83504 into a predefined state via instrument preset Line 20 Fixes numeric data output to 2 decimal places Line 30 Puts the 8350A in CW mode and pro grams a CW frequency of 7 555 GHz Line 40 9835 displays CW 7 555 GHz Line 50 Temporarily stops program execution Line 60 The 98354 displays CW in GHz The useris prompted to input anew CW frequency value which is stored in the vari
182. ndard Model 8350A instruments the HP IB address will be read by the processor from the HP IB address switch 851 upon initial power on only This HP IB address will remain in effect until the address is changed by modifying the 851 switch pattern and turning the LINE switch OFF and ON or by resetting the address through tne front panel SHIFT LOCAL function The HP IB address can be read directly from the front panel by pressing SHIFT LEL The current HP IB address is then displayed in decimal form on the FREQUENCY TIME display If the HP IB 851 HP IB ADDRESS SWITCH Figure 2 2 Location of ASSI HP IB Address Switch 2 4 Model 8350A address must be changed from that which is displayed enter the new decimal equivalent ofthe desired HP IB address and press GHz to termi nate the entry The FREQUENCY TIME display should now display the new HP IB address This address will remain in effect until the Model 8350A LINE switch is turned OFF When the instrument LINE switch is set to ON once again the HP IB address will revert back to the 851 address switch setting An INSTRUMENT PRESET command will not modify the current HP IB address setting 2 16 Option 001 Model 8350A instruments contain a battery supported memory and a special A3 Microprocessor board The battery option allows the instrument memory to retain the assigned HP IB address when the instrument is turned off regardless of the A8S1 address switch setting
183. ng the extended status byte which is accessible with the Output Status function only Status Byte 3 35 HP IB Addressing 3 36 Certain messages require that a specific talker and listener be designated Each instrument on the bus has its own distinctive listen and or talk address which distinguishes it from other devices Devices can be listen only talk only and both talker and listener 3 37 Addressing usually takes the form of universal unlisten command device talk address device s listen address es The universal un listen command removes all listeners from the bus thereby allowing only the listener s desig nated by the device s listen address es to receive information The information is sent by the talker designated by the talk address The system controller may designate itself as either talker or listener 3 38 Table 3 5 lists all the possible talk and listen addresses on the bus The device address 15 Comments EI i SPD Status The 8350A does not respond to Bit a Paralell Poll The 8350A does not have the Pass ability to take or pass control Control of the HP IB Responds by terminating all EL Listener or Talker functions Statements Interface Message Function Type HPL BASIC 9825 9835 9845 85 STATUS 719 or A S POLL 719 typically set via five binary bits which are the same for both listen and talk addresses with the six
184. nge of interest If swept the measurement data taking machine would need to sample the RF signal at a very fast rate to maintain accurate frequency information too This is typically not accomplished Stepped CW sweeps can be accom plished in several ways with the 8350A 1 Program sequential CW test frequencies 2 Program the frequency sweep range then enable the manual sweep mode Perform a stepped manual sweep by repetitively program ming the step up increment function 3 Program the CW frequency to the start fre quency the Step Size to an appropriate value then repetitively program the step up incre ment function Considering the speed of programming the above approaches the third is the most efficient This program illustrates a stepped sweep using this approach PROGRAM 6 PROGRAM 6 EXPLANATION Line 10 Set the 8350A to the predefined instru ment state enable the square wave modulation and disable CW Filter Line 20 The 9835A displays Start Freq GHz input prompts for Start frequency of the sweep Store it in the variable A Line 30 The 9835A displays Stop Freq GHz 2 input prompts for the stop frequency of the sweep Store it in B Line 40 The 98354 displays Step Size GHz input prompts for the step size of the sweep Store it in IYASAN IIRL RATE EIB tt Line 50 Determine the number of frequency steps in sweep store
185. nt of the functions selected and the plug in used Format 8 8 bit bytes EOI Mode String Selected with the OM program code the 8350A outputs a Mode String of 25 bytes in length This binary data string describes all presently active functions of the 8350A and 83500 Series Plug in The information is not packed thereby making data analysis simpler The information passed includes only the active functions with no numeric values included Use the Active or Interrogate Function if numeric values are desired The length of the Mode String is fixed independent of the functions selected and the plug in used Format 25 8 bit bytes EOI interrogate Function Selected with the OP program code and the program code for the function to be interrogated the 8350A will output the present numeric value of the selected function The units of the output data are Hz dBm dB or sec implied with the function selected Format td dddddE dd CR LF Active Function Selected with the OA program code the 8350A will output the present numeric value of the presently active function ie enabled for modification from the keyboard or step keys The units of the output data are Hz dBm dB or sec implied with the function selected Format td dddddEtdd CR LF Status Selected with the OS program code the 8350A will output 2 sequential bytes 8 bits wide giving the present instrument status The first st
186. nt sweep widths The overlapping portion of one of the sweeps can have an increased intensity The 8750A Storage Normalizer will need to be in BYPASS mode to view Z axis modulation on the oscilloscope Power Sweep The RF output power may be ramped up when the sweeper is in the swept or swept CW mode by using the POWER SWEEP function See Figure 10 fora gain compression display using power sweep Save and Recall This function allows the storage and recall of nine complete instrument settings i6 LLL AMPLIFIER GAIN 15 dB 15 x F GAIN dB 2 4 6 8 10 12 14 16 18 20 POWER N dBm Figure 10 Gain Compression Display Model 8350A Model 8350 Local Operation Figure 11 outlines the general procedure used in making a scalar transmission and reflection measurement The 11692D Dual Directional Coupler is used in the example but if a 11666A Reflectometer Bridge is available it may be used instead of the Coupler and two detectors 87555 Option 002 To keep the following procedure brief the 8750A will not be used switched to BYPASS in the procedure The following anomalies exist when using the 8750A with the 8350A Sweep Oscillator The 8350A DISPL BLANK must be engaged to ensure triggering 8750A updating 9 Intensity markers are changed to amplitude markers In A mode they appear as a level shift over the MKR A range If an 8755 channel is switched off the trace goes to the reference line bottom
187. number of digits after the decimal point Notice that the 8350A displays the frequency to 3 decimal places 1 MHz fre quency resolution Values with better than 1 MHz frequency resolution are rounded to the nearest MHz by the 8350A However when the 9845B is reset all numeric output data defaults to the FIXED 2 or fixed 2 decimal places format Thus the 9845B rounds the desired frequency to the nearest 10 MHz To change this free field format to more decimal places modify the fixed format statement in line 20 to FIXED 5 from the keyboard then re run the program Another approach is to utilize the image statement to set the desired number of decimal places To use the image statement in the program do the following on the 9845B Press STOP Type DEL 80 90 Press EXECUTE This should delete lines 80 and 90 from program 2 and allowthe use of lines 100 110 and 120 instead Run the modified program again and use the same steps for operation as before Now if the value inputted has a frequency resolution greater than 1 MHz the 9845B does the rounding instead of the 8350A This is the preferred programming approach Change the image statement for 10 MHz frequency resolution and verify the results from the 8350A frequency display Since device select code address can bea variable verify that this can be used in the modified or original program 2 by doing the following 1 Insert before Line 10 a new line with the variable
188. ocal front panel control The Instrument Preset key when engaged will first run the Sweep Oscillator selftest then set the controls to the preset condition INSTRUMENT STATE REM ADRS D esum po G3 LCL Returns Sweep Oscillator control to front panel from remote operation unless a Local Lockout has been executed The 8350A retains the same control settings when switched from remote to local PANEL LAYOUT FUNCTIONS INDICATORS Select HP IB Address Provides a way to see and change the current HP IP address code 0 to 30 The code is displayed in the FREQUENCY TIME display INSTR PRESET The following two steps take place when instrument preset is engaged or the sweep oscillator is switched on Plug in related error E050 to E059 information is found in the plug in manual 1 self test of the entire instrument is begun that takes approximately 1 seconds to complete If an error is found the test stops and an error code is displayed Section 8 has a list of error codes and failures After self test the sweep oscillator presets the controls as follows SWEEP MODE START STOP over the full frequency range of the plug in SWEEP TIME fastest allowable for plug in Markers Modulation off Marker frequency values reset to center of band Vernier Offset 0 MHz SAVE RECALL allregisters setto INSTR PRESET value if Opt 001 Non volatile memory values unchanged When using 83500 series plug ins POWER LEVEL maximum leveled va
189. of CRT 17 Local Operation Model 8350A 18 Example L Connect the equipment as shown in I 11 Initially the 8350A should be set by pressing f E ID Set to 27 8 KHz which will set the front panel instrument state Bod activate the internal square wave modulation 8350 SWEEP 83500 OSCILLATOR SERIES PLUG IN 1827 OSCILLOSCOPE 8750A POS 2 BLANK I STORAGE NORMALIZER SWP INTERFACE 87556 SWEPT o INTERCONNECT AMPLITUDE ANALYZER E Pal 11664A ALT Swe D U T INTERFACE PI TL 11684A INCIDENT OUTPUT I 116920 COAXIAL DUAL DIRECTIONAL COUPLER INPUT REFLECTED 11664A Notes on connections Either the front or rear panel SWEEP OUT IN may be used When in mode both channels 1 and 2 on 8755 must be on and receiving inputs Turn off channel 1 on the 8755C by releasing the display pushbutton Set the 8350A controls as desired On channel 2 set the function dB DIV and Offset desired for viewing the current sweep setting Set the 8350A controls as desired then store the current 8350A sweep setting in any available memory location Then turn off channel 2 by releasing its display pushbuttons Turn on Channel 1 of the 8755C and set the function dB DIV and Offset as desired Set 8350A controls as desired Turn on channel 2 Press 1 n and the 8350 will alternate between the two settings on successive sweeps Channel now displays the r
190. of CW frequency MODULATION CHARACTERISTICS Internal AM Square wave modulation available at all sweep speeds Factory preset to 27 8 kHz although selectable via internal jumper to 1000 Hz or 27 8 kHz Refer to RF plug in for On Off ratio specifications INSTRUMENT CONTROL Control Knobs Step Keys and Data Entry Keyboard 1 4 instrument parameters whether time frequency or power may be set in three ways The control knobs allow for continuous adjustment of any parameter n exact function value can be entered through the Data Entry Keyboard For incrementing or decrementing power or fre quency values the Step Keys Step Up Step Down can be used The step size can be entered by the user or the pre programmed default values may be used The SHIFT key is used to effect the function written in blue on the front panel INSTRUMENT STATE STORAGE SAVE n RECALL n Up to 9 different front panel settings can be stored in the 8350A via the SAVE n n 1 through 9 function Instrument settings are stored in memory locations through 9 and can be recalled randomly orin sequence 1 9 1 with Step Up Step Down keys or by contact closure to ground of the Step Up Advance pin 22 on the rear panel Programming Connector ALT The ALT n function causes the RF output to alternate on successive sweeps between the current front panel setting and the setting stored in memory location n n 1 through 9 INSTRUMENT
191. of the 8350A Sweep oscil lator in the Local mode is described in the Local Operation handbook and by functional block figures indexed in the table of contents and Table 3 2 E 1 Operating Information Model 8350A FRONT PANEL FEATURES FREQUENCY DATA ENTRY POWER Level Markers Sweep See Figure 3 11 Control Crystal MARKERS FREQUENCY TIME Marker See Figure 3 13 83522A and Sweep Modes Transfer Storage Registers 83525A See Figure 3 6 See Figure 3 8 See Figure 3 9 See Figure 3 16 LINE INSTRUMENT Modulation Pull Out Card ALC MODE This switch STATE Blanking Provides brief See Figure 3 15 controis power See Figure 3 7 See Figure 3 12 summary of to Sweep Oscil SWEEP TRIG Sweep Oscillator Signal Control lator and instal GER SWEEP controis and See Figure 3 14 led Plug in See Figure 3 10 functions Figure 3 1 Front Panel Features Model 8350 Operating Information REAR PANEL FEATURES Plug in connectors as apply 1V GHz Frequency Reference output connector provides approximately 1V DC per GHz of sweep signal output EXT MKR IV RMS MAX on 83522A and 83525A only input connector allows use of external markers when plug in front panel EXT MARKER FREQ button is engaged SQUAREWAVE INPUT connector provides input connector for external pulse or squarewave modu lation 8755 compatability EXT ALC and RF OUTPUT These connectors re place the corresponding front panel connectors in Opt
192. ont panel controls 8 Press CONT on the 9845B Verify that the 8350A has undergone an Instrument Preset and the REM lightison The Output OUTPUT 719 statement does two things one it performs a REMOTE 719 and second it passes data to the 8350 Note that the 8350A LCL key produces the same result as programming LOCAL 719 or LOCAL7 Be careful as the latter command places all instruments on the HP IB in local state as opposed to the 8350A alone concatenation of character strings and or variables The data can be specific codes free field formatted data or reference a specific image IMAGE state ment For example to program the CW Frequency CW one program code sequence is CW followed by the frequency in GHz then GZ If the frequency is to be 7 555 GHz then the string CW7 555GZ will suffice However if the frequency were to change then a variable F could indicate the frequency in GHz and the program string could be CW F GZ Using an image statement also allows a specific number of digits to be passed thereby avoiding any unexpected round off errors NOTE This program expects an 83500 Series Plug in that covers the frequency 7 555 GHz If using a plug in that does not cover this frequency range then the value in lines 30 and 40 should be changed to an appropriate value PROGRAM 2 PROGRAM 2 EXPLANATION Line 10 Puts the 8350A into a
193. ontroller can take control of the bus even if it is not the active controller Each system can have only one system controller even if several con trollers have system control capability 3 33 HP IB System Messages 3 34 The transfer of information via the HP IB occurs from one device to one or more devices thus consider the information to be a message There are twelve types of messages on the HP IB The following describes each ofthe HP IB System Messages a The Data Message The actual infor mation which is sent from the talker to one or more listeners on the HP IB The informa tion or data can be numeric or a string of characters i b The Trigger Message This causes the listening device s to perform a device dependent action when addressed c The Clear Message This causes either the listening device s or all of the devices on the bus to return to a predefined device dependent state d The Remote Message This causes the listening device s to switch from local front panel control to remote program control when addressed to listen This message remains in effect so that devices subse quently addressed to listen will go into remote operation e The Local Message This clears the remote message from listening device s and returns the device s to local front panel control Operating Information f The Local Lockout Message This prevents the user of a device from manually inhibiting remote program
194. or verification Reset the 9845B scratch the 9845B memory then type in the above program Run the program The 8350A will undergo an instrument preset enable the square wave modulation then retum to local front panel control Then perform the following 1 Adjust the 8350A to a preferred instrument state then press CONT on the 98458 2 Turnthe 8350A line power off Wait five seconds then turn the 8350A power back on Press INSTR PRESET on the 8350A 3 Press CONT on the 9845B Verify on the CRT display and or the 8350A that the original instrument state has been restored EXAMPLE PROGRAM 5 interrogating The Present Value Of A Function While the 8350 Learn String enables the user to completely save a string of characters that define the present instrument state the information is densely packed and encoded to save memory space If the user wishes to determine the actual value of a specific parameter say the Start Fre quency it would require a tedious process to extract a numeric value from several characters within the Learn String An easier approach is to use the Output Interrogated Parameter function of the 8350A With this function the 9845B instructs the 8350A to output the present numeric value of a specified function Any function that has a numeric value associated with it can be interrogated Note that if the parameter is not presently active the 8350A uses a Computed value or its previous value The following
195. ot sufficient the instrument may be sent as per Section 2 to your local HP service organization Before sending the instrument back fill out and attach one of the blue service tags If a sweep oscillator error code is noticed when a failure occurs note that error code in the failure symptoms special control settings section of the tag Plug in Interconnect Service Tag Information Model 8350 Operating Information FREQUENCY Sweep Mode DESCRIPTION This function block contains the keys to select one of the three desired modes START STOP CW CF AF or a modification of the mode VERNIER OFFSET The two displays provide a visual display of the frequencies 1n the mode selected The rotary control knobs provide a variable control to change the frequency of the function selected PANEL LAYOUT FREQUENCY IO s 9 400 7 WOES FUNCTIONS INDICATORS START Enables START STOP mode and allows selection of the lower frequency limit of sweep STOP Enables START STOP mode and allows selection of the upper frequency limit of sweep CW Enables single frequency CW mode and allows selection of the frequency Swept CW Enables CW mode with full SWEEP OUTPUT voltage 0 10 volts CF Enables center frequency delta frequency mode and allows selection of the center frequency AF Enables center frequency delta frequency mode and allows selection of the total frequenc
196. ough to insure phase locking over entire sweep range Local Operation 19 Local Operation 20 Model 83 8412A 84108 PHASE MAGNITUBE 8350A SWEEP 83500 NETWORK ANALYZER ISPLAY QSCILLATOR SERIES PL UG IN FREQ REF em LAXIS BLANK SWPIN SOURCE pue d Sa E TIETE i gs I RF GUTPUT TVIGHz INPUT 8411A HARMONIC 8418 8414A FREQUENCY AUXILIARY POWER SUPPLY POLAR DISPLAY CONVERTER RF INPUT i BLANKING 8743A REFLECTION TRANSMISSION TEST SET Figure 13 83504 Connections to 8410 Notes on connections FREQ REF output of the 83500 or 86200 series Plug ins provides a 1 volt per GHz output so that the 8410B may synchronize with the sweep The 8410B display units 8412A 8414A require thatthe NEG Z BLANK from the 8350A be used as the blanking signal POS Z BLANK from the 8350A line contains the Z axis markers This line connects to the MARKERS input on the 8414 Polar Display and to the Z AXIS input on the 8412A Phase Magnitude Display SWEEP OUT IN outputs a0 to 10 volt signal in proportion to the swept or CW frequency output OV corresponds to the lower frequency sweep limit 3 10V to the upper Swept RF output causes a ramp voltage out CW output causes a dc voltage out This connection is necessary only when using 8412A Phase Magnitude Display 8350A 8410B SOURCE CONTROL CABLE Provides handshake lines for synchroni zation between 8350A and 8410B HP Part No
197. output power at output of device cable by increasing the output power at higher frequencies UNLEVELED Light Light is on when all or portion of sweep is unleveled POWER Display Provides digital display of Power Level and Power Sweep to a tenth of a dB and Slope to 0 01 dB The units for power level are dBm for power sweep dB and for slope it is dB GHz Figure 3 13 Power Control 83500 series Plug ins 1 of 2 38 Model 8350A LIMITATIONS CONCERNS l Power level control is calibrated over a 10 dB range typically 15 dB Power Level range up to 80 dB with plug in Option 001 70 dB Step Attenuator 2 The total combined Slope and Power Sweep range is 15 dB 3 Power Sweep will not cross a Step Attenuator boundary 4 Power Sweep and Slope values may not be negative LOCAL FUNCTION PROCEDURE Function Activate On Off Knob Keyboard Power EMEN Power EE 1 Values must end with terminator dBm or dB Range and Resolution Range See plug in Resolution 0 024 dB NX REMOTE FUNCTION PROCEDURE Sweep On 25 5 dB Sweep Off 0 01dBm Power Slope On 5 dB GHz Slope Off Program Code DM Xi dBm Xi dB Figure 3 13 Power Control 83500 series Plug ins 2 of 2 Operating Information 39 Operating Information Model 8350A 40 Signal Control DESCRIPTION This function block controls the signal purity and switches the signal R
198. pass Filter It is important that the two rear panel connections from the 8350A to the 8755C 182T are made fora proper CRT display For the example measurement set the following front panel controls On the 8755C Channel 1 Display OFF press all the display push buttons so that they are out Channel 2 Displays bec B dB DIVu eure Eoi E ua Chua UV pa 10 dB Reference Level 10 dB Reference Level Vernier OFF On the 182T or 180TR Magnifier ep em es X1 Display cesa INT After connecting the equipment reset the 9825 erase the 9825 memory then type in the above program Then run the program The 8350A will initially undergo an instrument preset which will set the proper power leveling mode and sweep blanking signals Since the 8755C requires the RF signal to be modulated at a 27 8 kHz rate the internal amplitude modulation is enabled If using a 4 to 6 GHz Bandpass Filter as the test device the CRT display should reflect the filter transmission 87558 182T SWEPT AMPLITUBE ANALYZER 8350A SWEEP OSCILLATOR POS Z BLANK 98034A SWEEP QUTAN Front or Rear DEVICE 11664 UNDER TEST DETECTOR Figure 2 Equipment Setup For Program 3 response overthe 3 to 7 GHz range Two frequency the 3 dB points The setup can be modified by markers of the Z Axis Intensity dot variety are set to changing the values in lines 5 6 7 8 and or 9 then 4 and 6 GHz
199. play Start Freq GHz Answer this prompt by inputting the desired Start frequency value in GHz of the sweep then press t 2 The 9845B will display Stop Freq GHz Answer this prompt with the desired Stop frequency in GHz of the sweep then press 3 The 9845B will display Step Size GHz Answer this prompt with the desired Step size in GHz of the sweep then press CONT 4 The 8350A CW frequency will be programmed to the Start frequency of the sweep selected Then the CW frequency is repetitively incre mented by the step size value The sweep is then restarted after reaching the stop frequency To stop the program press STOP Since part of the time involved in changing CW frequencies is in updating the numeric LED display if this could be defeated the CW frequency time can be optimized Note that one drawback is that the numeric display will not indicate the present fre quency The 8350A provides a Display Update On Off function and it can be implemented by modifying line 10 to be OUTPUT 719 IPMD1FIODUO Then re run the modified program using the same operation steps as above EXAMPLE PROGRAM 7 Using Service Requests Status Bytes and Request Mask VEMM eH MH ATAA oo ASAD EARN mT TUI Rn 003200 iN Certain error conditions of the 8350A can be detected by the 9845B so that corrective action can be taken Examples of some detectable error condi tions
200. pletely describes the present instrument state does not include the storage registers of the 8350A and 83500 Series Plug in This information is packed and encoded for minimal storage require ments thereby making data analysis difficult If data analysis is necessary use the Output Mode String and Output Interrogated Parameter functions instead When output from the 8350A and stored in an ASCII character data string the Learn String can later be input to the 8350A to restore that instrument state The length of the Learn String is fixed independent of the functions selected and the plug in used The Output Learn String function learns the present sweeper settings only To learn the storage register settings sequentially recall each storage register then learn the present sweeper settings Likewise to restore the storage registers input the learn string for the appropriate storage register then save the present sweeper settings in the proper register INPUT OUTPUT MICRO LEARN STRING A string of 8 bytes of binary data that completely describes the present CW Frequency Vernier Sweep Output voltage and Power Level of the 8350A and 83500 Series Plug in This information is packed and encoded for minimal storage requirements thereby making data analysis difficult When output from the 8350A and stored in an ASCII character data string the Micro Learn String can later be input to the 8350A to restore the instrument state for rapid CW frequency progr
201. plied to the front panel External ALC BNC input connector METER ALC This selects the external power meter for leveling with the power meter output applied to the front panel External ALC input connector EXT MTR ALC INPUT Input connector for External crystal detector and power meter outputs ALC CAL Used to adjust external leveling gain when using EXTERNAL leveling Clockwise rotation increases gain FREQUENCY CAL Adjustment that allows calibrating the RF plug in frequency using the crystal markers frequency marker indicator and a CW or Start Frequency value LIMITATIONS CONCERNS 1 Only crystal detectors of negative polarity 10 to 150 millivolts can be used 2 Only power meter outputs of 0 to 1 volts can be used The HP 431 and 432 series are compatible the HP 435 and 436 are not Figure 3 15 ALC Mode 83500 series plug ins 1 of 2 41 Operating Information Model 8350A LOCAL FUNCTION PROCEDURE Data Forms Function Activate and On Off Keyboard esolution Internal External Power Meter ERR MIR X Leveling Ln 1 Each mode disables all other appropriate modes REMOTE FUNCTION PROCEDURE Mod Funeti Program Code ode unction Leveling External Crystal External Power Meter 1 Mode disables all other possible modes FREQUENCY MARKER INDICATOR Lamp lites when RF output frequency is coincident with the selected crystal marker frequency Figure 3 15 ALC Mode 83500
202. predefined state via instrument preset Line 20 Fixes numeric data output to 2 decimal places Line 30 Puts the 8350A CW mode and pro grams a CW frequency of 7 555 GHz Line 40 The9845B displays CW 7 555 GHz Line 50 Temporarily stops program execution Line 60 The 9845B displays CW in GHz The user is prompted to input anew Cw frequency value which is stored in the variable F Line 70 Printonthe CRT display the programmed CW frequency Line 80 Program the CW frequency using the default data format Line 90 Go to line 60 Line 100 Image statement is set up for program ming the CW frequency with a 1 MHz resolution Line 110 Program the CW Ire quency via image statement in line 100 Line 120 Go to line 60 The equipment setup is the same as the previous example Reset the 9845B scratch the 9845B memory then type in the above program Then do the following 1 Run the program The 9845B displays CW 7 555 GHz The 8350A changes from the instru ment preset state of Start Stop sweep to a CW freqtiency of 7 555 GHz 2 Press CONT on the 9845B The 9845B now displays CW in GHz Type new CW frequency value in GHz then press CONT 3 The 8350A will be programmed to the new CW frequency with the new value printed on the CRT display The program jumps backto step 2 above When inputting the CW frequency try several values each with a different
203. preset sweep Printout equals plug in frequency range CW LED on printout CW frequency CF and AF TIME LEDS on 10 second sweeptime Remote lamp out 8350 3 19 PACKARD INTERFACE BUS 3 20 The 8350A Sweep Oscillator can be oper ated remotely via the Hewlett Packard Interface Bus HP IB Bus compatibility programming capability and data formats are described in the following paragraphs For complete information on specific program code syntax functions limits etc please see Functional Block Index Table 3 2 3 21 front panel functions except for the LINE switch and Set HP IB Address are program mable through the HP IB Also provided are special HP IB only functions to aid the programmer Complete descriptions of all HP IB programmable functions are contained within the functional blocks 3 22 To verify that the Sweep Oscillator s HP IB interface is functional a quick check is provided in Figure 3 4 Remote Operators Check This tests that the 8350 can respond and send to the controller the fundamental HP IB bus messages The following information gives a general de REMOTE OPERATION HEWLETT Operating Information scription of the HP IB and defines the terms concepts and messages used in an HP IB system 3 23 For more information about the HP IB refer to any of the following documents IEEE Interface Standard 488 1975 ANSI Interface Standard MC1 1 Improving Measurements
204. press END LINE 2 The 85A will display Stop Freq GHz 7 Answer this prompt with the desired Stop frequency in GHz of the sweep then press 3 The 85A will display Step Size GHz Answer this prompt with the desired Step size in GHz of the sweep then press END EINE 4 The 8350A CW frequency will be programmed to the Start frequency of the sweep selected Then the CW frequency is repetitively incre mented by the step size value The sweep is then restarted after reaching the stop frequency stop the program press STOP Since part of the time involved changing CW frequencies is in updatingthe numeric LED display if this could be defeated the CW frequency time can be optimized Note that one drawback is that the numeric display will not indicate the present fre quency The 8350A provides a Display Update On Off function and it can be implemented by CXAMPLE PROG a E 7 Using Service Requests 5 modifying line 10 to be OUTPUT 719 IPMD1DUO Then re run the modified program using the same operation steps as above dish ocior ars rm ASSI Md TINTE PEASAAR TASTI TY AH SS INDI ATER IERI RII Erst ioter esperar turre ita tete t oS aca a ese eee eve im yu rmt t Duo Certain error conditions of the 8350A can be detected by the 85 so that corrective action can be taken Examples of some detectable error condi tions are RF power unleveled numeric data entry out of range an
205. program demonstrates the capability of the interrogate function PROGRAM 5 OUTPUT 7 9 OPFER 2 ENTER 719 B PRAT Stop Frea 08 OUTPUT 713 B ENTER 719 T puc rica cORR INT Sweep Tie onsec 136 END LICET MHZ AS ONAL AEAN EAEE ETATIS TEE TESI MOL QUESTI NACE Aer snnt htt INDY RESIS eg AR gun Series mU tener Peer E LEE PROGRAM 5 EXPLANATION Line 10 Set the 8350A to a predefined instru ment state via instrument preset and enable the square wave modulation Line 20 Return the 8350 to local control Line 30 Temporarily stops program execution Line 40 Program the 8350A to output the present value of the Start Frequency Line 50 Read the value into the 9845B and store it in the variable A Line 60 Print on the CRT display the present value of the Start Frequency in MHz Line 70 Program the 8350A to outputthe present value of the Stop Frequency Line 80 Readthe value into the 9845B and store it in the variable B Line 90 Print on the CRT display the present value of the Stop Frequency in MHz Line 100 Program the 8350A to output the present value of the Sweep Time Line 110 Read the value into the 9845B and store itin the variable Line 120 Print on the CRT display the present value of the Sweep Time in milliseconds Line 130 Stops program execution Setup the equipment as in example 3 using the analyze
206. pt to change the start frequency and verify that this is impossible Verify that the Instrument Preset key and all other keys except LCL are disabled Now press the LCE key and verify that the 8350A REMote light is off and that you can modify any of the sweep functions 6 Press CONTINUE on the 9825 With the 9825 displaying Local Lockout verify that the 8350A REMote light is again lit Again attempt to change the start frequency and perform an instrument preset Verify that this is impossible Now press the LCL key and verify that still no action 15 taken 7 Press CONTINUE on the 9825 With the 9825 displaying Local verify that the 8350A REMote light is off Also verify that all sweep functions can now be modified via the front panel controls 8 Press CONTINUE on the 9825 Verify that the 8350A has undergone an Instrument Preset and the REMote light is on The Write wrt 719 statement does two things one it performs a rem 719 and second it passes data to the 8350A Note that the 8350A LCL key produces the same result as programming cl 719 or Icl 7 Be careful as the latter command places all instruments on the 1 in local state as opposed to the 8350A alone AMPLE RO G RAM 2 2 5 Progr amming Fune tions To program any function on the 8350A the controller must pass specific program codes and data to the sweeper The statement that allows this is the Write wrt statement
207. put Power Level to 10 dBm Line 80 Set the Sweep Time to 50 milliseconds Line 90 Set Marker 1 to 4 GHz Line 100 Set Marker 2 to 6 GHz Line 110 Stop program execution Setup the equipment as shown in figure 2 by adding the 8755C the 180TR or 182T the 11664 andatest device like a 4 to 6 GHz Bandpass Filter It is important that the two rear panel connections from the 8350A to the 8755C 182T are made fora proper CRT display For the example measurement set the following front panel controls On the 8755C Channel 1 Display OFF press all the display push buttons so that they are all out Channel 2 Display iv sso s B IBI DIV SY Gets e e die 10 dB Reference Level 10 dB Reference Level Vernier OFF On the 182T or 180TR enia ree e oe X1 Se rere rr eT INT After connecting the equipment reset the 85A scratch the 85A memory then type in the above program Clear the 85A CRT display then run the program The 8350A will initially undergo an instrument preset which will set the proper power leveling mode and sweep blanking signals Since the 8755C requires the RF signal to be modulated at a 27 8 kHz rate the internal amplitude modulation is 85 PERSONAL COMPUTER 82937A FIGURE 2 Equipment Setup For Program 3 enabled If usinga 4 to 6 GHz Bandpass Filter as the test device the CRT display should reflect the fil
208. quest capability Remote Local capability No Parallel Poll capability Device clear capability Device trigger capability No controller capability Open collector bus drivers Model 8350 3 43 Compatible Universal and Addressed HP IB Commands 3 44 The 8350A will respond to the following universal and addressed commands which are sent in the command modes ATN true Universal DCL Device Clear DC4 LLO Local Lockout DC1 MLA My Listen Address selectable MTA My Talk Address selectable SPD Serial Poll Disable EM SPE Seria Poll Enable CAN UNL Unlisten UNT Untalk Addressed GET Group Execute Trigger Go to Local Selected Device Clear 3 45 Remote Mode 3 46 Remote Capability The 8350A commu nicates on the bus in both remote and local modes In remote its front panel controls are disabled except the LINE switch and LCL key The 8350A can be addressed to listen or talk When addressed to listen the 8350A will automatically stop talking and respond to the following bus messages Data Trigger Clear Remote Local Local Lockout Clear Lockout Set Local and Abort When addressed to talk the 8350A will automatically stop listening and send one of the following messages Data Require Service or Status Byte 3 47 Displays The REM light is on when the 8350 is in the remote mode The ADRS D light is on when the 8350A is currently addressed to talk o
209. r Operation 1 49 The standard Model 8350A requires that the ac power line frequency be 50 to 60 Hz Option 400 allows the instrument to operate with a 400 Hz ac power line frequency 1 50 Option 907 Front Handles Kit 1 51 Option 907 HP Part Number 5061 0089 contains a pair of front handles and the necessary hardware for mounting the handles to the Model 8350A Refer to Section II of this Operating and Service Manual for a detailed description of this kit and instructions for installation Model 8350A 1 52 Option 908 Rack Mount Kit 1 53 Option 908 HP Part Number 5061 0077 contains a pair of flanges and the necessary hardware to mount the Model 8350A in an equipment rack with 482 6 mm 19 inches hori zontal spacing Refer to Section II of this Oper ating and Service Manual for a detatiled descrip tion of this kit and instructions for installation 1 54 Option 909 Rack Mount Front Handles Kit 1 55 Option 909 HP Part Number 5061 0083 contains one Option 907 Front Handles Kit and one Option 908 Rack Mount Kit see descriptions in preceding paragraphs Refer to Section of this Operating and Service Manual for a detailed description of this kit and instructions for installation 1 56 Option 910 Extra Operating and Service Manual 1 57 The standard instrument is supplied with one Operating and Service Manual Each Option 910 provides one additional Operating and Service Manual To obtain additional Ope
210. r instruments The instrument is packaged at the factory with two shipping bars attached to the front sides refer to Figure 2 12 If the instru ment does not include front handle or rack mount options replace the shipping bars with the self adhesive trim strips supplied with the instrument Model 8350A Installation PROGRAMMING CONNECTOR J13 as seen from rear panel Control of input lines can be accomplished by contact closure to ground for a logic low level and open circuit for a logic high level Logic Levels Low lt 0 8 High 2 4 Vdc o an OG a pb Q N w OOOOOOOOOOOOO OOOOOOOOOOOO NO CONNECTION LOW MARKER PULSE OUTPUT LOW PENLIFT REQUEST INPUT ALTERNATE SWEEP 1 QUTPUT LOW STOP FORWARD SWEEP REQUEST INPUT 5 VOLTS 100 ma MAX OUTPUT LOW RF BLANK OUTPUT LOW RF BLANK REQUEST INPUT HIGH EXTERNAL TRIGGER SWEEP INPUT HIGH PENLIFT OUTPUT LOW PEN MUTE FOR X Y RECORDER NO CONNECTION NO CONNECTION OUTPUT LOW BLANKING PULSE 1 OUTPUT LOW MARKER REQUEST INPUT LOW RETRACE STROBE OUTPUT LOW ALTERNATE SWEEP ENABLE OUTPUT LOW STOP SWEEP REQUEST DIGITAL GROUND LOW BLANKING PULSE REQUEST INPUT INPUT L CNTR LOW COUNTER TRIGGER OUTPUT L STPADV LOW STEP ADVANCE INPUT L PL LOW PENLIFT OUTPUT SYNC TRG HIGH SYNCHRONIZING TRIGGER OUTPUT NO CON
211. r listen All other displays function the same asin local front panel control 3 48 Local to Remote Change The 8350A switches to remote upon receipt of the two part Remote message The two parts of the Remote message are Remote Enable REN Addressed to Listen MLA Operating Information 3 49 The Sweep Oscillators output signal and all control settings remain unchanged with the local to remote transition 3 50 Local Mode 3 51 Local Capability In local the 8350A can send a Require Service message send a Status Byte and respond to the Remote message NOTE The 8350A can respond to all HP IB messages except the Data Message while in local However most of these messages would not normally be used in the local mode 3 52 Remote to Local Change The 8350 returns to local control upon receipt of the Local or Clear Lockout Set Local message It can also be set to local by pressing the front panel LCL key assuming that local lockout is not in effect The Sweep Oscillators output signal and all control settings remain unchanged with the remote to local transition 3 53 LocalLockout When a data transmission is interrupted which can happen by returning the 8350 to local with the front panel LCL key the data could be lost This would leave the 8350A in an unknown state To prevent this a local lockout is recommended to disable the LCL key Local lockout remains in effect until the 8350A is returned to the
212. range 10 to 10 dBm Figure 3 16 Crystal Marker Frequency 83500 series plug ins 1 of 2 43 Operating Information Model 8350A LIMITATIONS CONCERNS l Plug in markers display modes are independent of the 8350A mainframe markers Hence any combination of intensity or amplitude markers will work 2 Intensity markers obtainable using the positive polarity Z axis output only 3 Maximum drive level of External Marker Input is 10 dBm 4 Plug in markers can be intensity and amplitude variety simultaneously LOCAL FUNCTION PROCEDURE Function Activate 10 MHz Marker 50 MHz Marker Amplitude Markers Intensity Markers REMOTE FUNCTION PROCEDURE E Code ode Le External Input am Amplitude MKR On CAI Amplitude MKR Off Intensity On Intensity MKR Off CIO Mode disables the previous mode Range and Resolution Crystal Marker Frequency Crystal Marker Figure 3 16 Crystal Marker Frequency 83500 series plug ins 2 of 2 44 Model 8350 HP IB ONLY FUNCTIONS DESCRIPTION This section describes functions which are only accessible via the HP IB These functions allow the HP IB user to learn about the present instrument state setup the instrument state and enable some special functions to improve HP IB operation DESIGNED FOR HP IB SYSTEMS FUNCTIONS INPUT OUTPUT LEARN STRING string of 90 bytes of binary data that com
213. rating Information 45 Operating Information Model 8350A 46 the 8350A with a function code that does not start with a number 0 9 or the letters A through F since these are interpreted as possible Micro Learn String data characters It is suggested that the user exit this mode by using the MO code as the mode terminator then restore the numeric displays via the CW ST and PL function codes OUTPUT MODE STRING A string of 25 bytes of binary data that describes all of the presently active functions of the 8350A and 83500 Series Plug in This information is not packed thus allowing simple data analysis The information passed indicates only which functions are presently active functions with no numeric values included By determining the decimal value of each byte the user can determine which function is active To determine the actual numeric value of some functions use the Output Interrogated Parameter function The length of the Mode String is fixed independent of the functions selected and the plug in used OUTFUT INTERROGATED PARAMETER The 8350A outputs the present numeric value of the instructed parameter that is to be interrogated Any parameter that has a numeric value associated with it such as Start Frequency Sweep Time etc can be interrrogated The units of the output data are Hz dBm dB or sec implied with the function selected OUTPUT ACTIVE PARAMETER The 8350A outputs the numeric value of the param
214. rating and Service Manuals after initial shipment order by manual part number listed on the title page and rear cover of this manual 1 58 ACCESSORIES SUPPLIED 1 59 Figure 1 1 shows the Model 8350A and power cable The power cable supplied depends upon the country of destination Refer to Section II of this manual for HP Part Number infor mation 1 60 EQUIPMENT REQUIRED BUT NOT SUPPLIED 1 61 To have a complete operating sweep oscillator the Model 8350A Sweep Oscillator must have an RF plug in unit installed The HP 83500 Series RF Plug ins have been specifically designed for use with the Model 8350A They provide calibrated output power levels calibrated power sweeps internal leveling and slope control and full HP IB programmability Economical use of the HP Model 86200 Series RF Plug ins may be untilized with the Model 8350A with the addition of the HP Model 11869A RF Plug in Adapter The Model 11869A mounts at the rear of the Model General Information 86200 Series RF Plug in and provides the interface for signals and voltages from the Model 8350A to the RF plug in All of the Model 8350A standard operating features including HP IB remote programming are available however specific RF plug in functions output power level RF on off etc cannot be controlled or remotely pro grammed by the Model 8350A mainframe 1 62 use the HP IB capabilities of the Model 8350A a computing controller such as the HP 9825 D
215. ries Plug ins and 11869A Adapter This assumes that the status bits are numbered 0 thru 7 with the least significant bit being number 0 Other references may assume that the bits are numbered 1 thru 8 with the least significant bit being number 1 If using an 86200 Series Plug in the Status Bytes can provide only limited information Table 1 indicates which Status Byte functions bits are usable PROGRAM 7 PROGRAM 7 EXPLANATION Line 10 Clear the status of the HP IB Line 20 Clear the status of the 8350 Line 30 Preset the 8350A to a predefined instru ment state and enable the square wave modulation Line 40 Indicate that if an interrupt from the 82937A HP IB Interface is received that program execution will branch to the interrupt service routine located at the line 110 Line 50 Specify and enable the controller to accept an interrupt from the 82937A if bit 3 decimal value 8 is set Line 60 The 85 displays CW Freq GHz Line 70 Input prompts for the desired CW fre quency value in GHz Store it in the variable F Line 80 Set the CW frequency as determined by Line 90 Wait 100 milliseconds to allow the 8350A to interrupt Line 100 Go to line 60 Line 110 Read the 82937A interrupt cause register to enable another interrupt Line 120 Location of the interrupt service routine Read the Status Byte of the 8350A and store it in A Line 130 Check bit 0 of the 835
216. rmation frequency RF Output indicated on the FRE QUENCY LED display CW mode operation is indicated by the yellow LED located above the CW pushbutton CW frequency when enabled may be varied through the use of the data entry controls When the SHIFT CW mode is selected 0 to 10 volt sweep ramp will be output at the front and rear panel SWEEP OUTPUT SWEEP IN PUT BNC connectors even though the RF frequency is fixed in the CW mode 1 31 CF AF Mode 1 32 The CF AF frequency sweep mode allows the instrument to sweep upward in frequency symmetrically centered about a CF Center Fre quency setting CF AF sweep mode operation is indicated by the yellow LEDs centered above the CF and AF pushbuttons CF and AF frequencies may be individually varied through use ofthe data entry controls START STOP and CF AF sweep modes may be interchanged without affecting the RF Output When changing between CF AF sweep mode and CW mode the CW frequency and the Center Frequency CF are equivalent 1 33 Frequency Marker Operation 1 34 Five independent continuously variable amplitude or intensity markers are available to note significant points on the frequency sweep Marker selection is indicated by a yellow LED located within each Marker pushbutton Marker frequency is indicated on the FREQUENCY LED display The frequency difference between any two markers can be displayed by the MKRA function A MKR SWEEP function allows a frequenc
217. rn address model number and full serial number located on rear panel serial plate Mark the container FRAGILE to assure careful handling In any corres pondence refer to the instrument by model number and full serial number 2 56 Other Packaging The following general instructions should be used for repack aging with commercially available packaging materials Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard Office or Service Center attach a tag indi cating the type of service required return address model number and full serial number b Use a strong shipping container Use enough shock absorbing material around all sides of the instrument to provide a firm cushion and to prevent movement inside the container Protect the control panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling f In any correspondence refer to the instru ment by model number and full serial number Model 8350 SECTION IH OPERATION The Operation section of this manual consists of the following three subsections 1 OPERATING INFORMATION This subsection contains indexed functional blocks which provide complete local and remote information on the use of the 8350A Sweep Oscillator by function Also contained in this subsection is Operator s Maintenance Local and Remote Operators checks LOCAL OPERATION Th
218. roximately the center of the trace 5 Press SWEEP button then press DATA ENTRY button a few times and observe sweep getting slower Press DATA ENTRY S button a few times and observe sweep getting faster 6 Press DATA ENTRY sec and observe FREQUENCY TIME display is 0 100 Figure 3 3 Local Operators Check 2 of 2 Operating Information Flowchart START Send REN command to ensure instrument is in remote enable state Program sweep oscillator to Instrument Preset Print Start and Stop frequencies Switch to CW Print CW Switch to CF AF Change sweep time to 10 seconds Switch to local 1 Typical Statements for the HP 9825 Series Desktop Computer 2 Typical Statements for the HP 9835 9845 and 85 Series Desktop Computers rem t red wr t red prt REMOTE OPERATOR S CHECK HPL Statements 719 719 719 4 719 719 B START FREQ A prt ST UP FREQ B unt red pr wrt 719 CUDP Cy 719 C Cay ti CFST10SC LoL 719 BASIC Statements 719 OUTPUT 719 OUTPUT 719 ENTER 719 4 OUTPUT 719 OPFB ENTER 719 B PRINT START FREG 4 FRINT STOP FREQ B OUTPUT 719 Cu OPCy ENTER 719 0 PRINT CU C GUTPLET 719 CESTA asc LOCAL 719 Figure 3 4 Remote Operator s Check Model 8350A Visual indicators Remote LED on instrument START STOP condition
219. rs CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used for verification Reset the 9845B scratch the 9845B memory then type in the above program Run the program The 8350A will undergo an instrument preset enable the square wave modulation then return to local front panel control Then perform the following EXAMPLE PROGRAM 6 Stepped CW Sweep Present automatic measurement systems typically make measurements at a sequence of CW test frequencies instead of analog sweeping the fre quency range of interest If swept the measurement data taking machine would need to sample the RF signal at a very fast rate to maintain accurate frequency information too This is typically not accomplished Stepped CW sweeps can be accom plished in several ways with the 8350 1 Program sequential CW test frequencies 2 Program the frequency sweep range then enable the manual sweep mode Perform a stepped manual sweep by repetitively program ming the step up increment function 3 Program the CW frequency to the start fre quency the Step Size to an appropriate value then repetitively program the step up incre ment function Considering the speed of programming the above approaches the third is the most efficient time wise This program illustrates a stepped sweep using this approach PROGRAM 6 PROGRAM 6 EXPLANATION Line 10
220. s control RF BLANKING This function when engaged light on blanks turns off the RF power during the retrace sweep Lm SQUAREWAVE MODULATION This function when engaged light on enables the internal amplitude modulation squarewave The standard squarewave frequency is 27 8 KHz internally selectable to 1 KHz SWEEP OUTPUT INPUT When Sweep Oscillator is in manual or time sweep mode this connector provides a linear ramp voltage from 0 to 10 volts that is synchronous with RF sweep In external sweep mode connector is input for a sweep ramp from 1 to 10 volts LIMITATIONS CONCERNS l Changing frequency of modulation 1 or 27 8 KHz requires removal of a jumper see Adjustment section 2 Plug in frequency markers are controlled from plug in for CRT intensity dots or RF amplitude dips Figure 3 12 Modulation Blanking 1 of 2 36 Model 8350A Operating Information Internal squarewave modulation and a External AM signal can be used simultaneously CRT Z axis control is provided with both positive and negative polarity control for blanking via rear panel POS Z BLANK or NEG Z BLANK Mainframe frequency markers when used in the CRT intensity dot mode are useable with positive polarity Z axis control only LOCAL FUNCTION PROCEDURE Data Forms Ranae an Amplitude Markers Display Blanking Blanking Squarewave Modulation REMOTE FUNCTION PROCEDURE Program Code Function HE i A
221. sed the 8350A will return to the remote state to local control To prevent this from occurring the Local Lockout ilo command disables all front panel controls specifically the Local key The Go To Local Ic command will return the 8350A to front panel control thereby removing it from the remote and local lockout modes Note that the above remote and local commands are different from the general HP IB bus localand remote commands lcl 7 and rem 7 Finally in remote control it is peri odically desirable to reset the 8350A to a pre defined state this is achievable with the instrument Preset function PROGRAM 1 PROGRAM 1 EXPLANATION Line 0 Sets 8350A to remote the 9825 displays Remote then stops program execution Line 1 Sets 8350A to remote and local lockout the 9825 displays Local Lockout then stops program execution Line 2 Sets 8350A to local the 9825 displays Local then stops program execution Line 3 Sets 8350A to remote and performs an Instrument Preset then stops program execution Cj SE SI IS IMS AC WESS SRT TMT MNT OIL SAO OCC me AIRES To verify and investigate the different remote modes perform the following 1 Press RESET ERASE EXECUTE on the 9825 This erases the program memory Press INSTR PRESET on the 8350 Type in the above program Press RUN on the 9825 With the 9825 displaying Remote verify that the 8350A REMote light is lit From the front panel attem
222. sed and bandwidth being swept When display reads seconds sweep time can be adjusted with the control knob or data entry keyboard The step keys can be used to adjust the sweep time in a 1 2 5 sequency MANUAL SWEEP MAN FREQUENCY TIME display will read GHz MHz By using the FREQUENCY TIME control step keys or data entry keyboard itis possible to manually sweep the frequency range with the display indicating the present output frequency EXTERNAL SWEEP EXT The 8350A can be swept via an external voltage Apply 0 to 10 volts into sweep output input can use BNC connector on front or rear panel with OV input corresponding to the lower frequency limit of the sweep range and 10V corresponding to the upper limit DC sweep input voltages will cause CW frequency outputs Markers and blanking outputs are disabled when in external sweep mode SWEEP TRIGGER Controls when the sweep will begin in the timed sweep mode The sweep light SWP is lit when the sweep 18 occurring INT Sweep triggered internally free running LINE Sweep triggered by power line frequency Figure 4 Frequency Time Controls 1 of 3 Model 8350A Local Operation EXT The sweep can be triggered externally by applying a positive going signal from 0 to2 volts minimum 20 volts maximum to Programming Connector pin 9 The trigger signal must be wider than 0 5 microsecond at less than 1 MHz repetition rate SINGLE This key selects single sweep mode and a
223. series plug ins 2 of 2 42 Model 8350 Operating Information Crystal MARKER FREQUENCY DESCRIPTION This functional block controls the crystal frequency markers by selection of the marker crystal frequency and the marker display mode intensity or amplitude Crystal frequency combs of IMHz usable below 1GHz 10 MHz 50 MHz or an external frequency may be input to the rear panel External Marker input The crystal frequency markers can be displayed independent of the mainframe frequency markers in their CRT intensity dot via Z axis control and or RF amplitude dips PANEL LAYOUT MARKER FREQ MHz 10 50 EXT 1 GOV AMPTD INTENS MKA MKR MKR FUNCTIONS INDICATORS 1 MHz CRYSTAL Selects light on a crystal frequency comb of markers at harmonics of 1 MHz 10 MHz CRYSTAL Selects light on a crystal frequency comb of markers at harmonics of 10 MHz 50 MHz CRYSTAL Selects light on a crystal frequency comb of markers at harmonics of 50 MHz EXTERNAL FREQUENCY Selects frequency markers at the RF frequencies that are input to the rear panel External Marker input to the rear panel External Marker input Allowable RF power range at input is 10 dBm minimum to 10 dBm maximum INTENSITY MARKER Sets the marker display mode to CRT intensity dots via Z axis control AMPLITUDE MARKER Sets the marker display mode to RF amplitude dips EXTERNAL MARKER INPUT Rear panel input for external frequency marker Maximum drive
224. several values that are out of range of the plug in s frequency limits and verify thatan error message was printed on the CRT display The program repeats the above input prompt To stop the program press STOP Table 1 8350A Status Byte Descriptions STATUS BYTE 41 EXTENDED STATUS BYTE 2 Bit Functions not usable with 86200 Series Plug ins and 11869A Adapter AKm Almn A1 A2 A3 BK CAm CF Cim CW C1 C2 C3 C4 PROGRAMMING CODES Code Description Code Description Amplitude Marker On Off MPm Alternate Sweep On Off MS Internal Leveling MZ External Crystal Leveling MO External Power Meter Leveling M1 Backspace gs Amplitude Crystal Marker On Off M4 83522 83525 Only M5 Center Frequency Intensity Crystal Marker On Off NT 83522 83525 Only OA CW Frequency OL 1 MHz Crystal Marker Frequency OM 83522 83525 Only OP 10 MHz Crystal Marker Frequency OS 83522 83525 Only OX 50 MHz Crystal Marker Frequency PL 83522 83525 Only PSm External Crystal Marker Frequency 83522 83525 Only n RFm Delta F Frequency Span RM dBm RPm Step Down Decrement RS Display Blanking On Off 5 Display Update On Off di Exponent Power Of 10 SH Start Frequency Sim Stop Frequency SM CW Filter In Out SP 20 MHz V FM SS 6 MHz V FM ST GHz SVn SX Hz FS Input Learn String T1 Instrument Preset T2 Input Micro Learn String I3 KHz T4 Marker To Center Frequency UP Square Wave Amplitude Modula VR
225. sly active The FREQUENCY TIME control keyboard and step keys can change the active marker value To exit MKR A mode press OFF Example M4 and set frequency via DATA ENTRY keyboard or Control to 2 GHz 2 2 and set frequency via DATA ENTRY keyboard or Control to 2 4 GHz 3 Press SHIFT MKR A Note Frequency Time display reads difference between Marker 4 and Marker 2 400 MHz Figure 4 Frequency Time Controls 3 of 3 Model 8350A ed om J af e cy 666 0 INSTHOMERT i apps b 9 58 Deo K Ri c y SAVEn RECALLn ALTn SAVEn RECALLn The 8350 is equipped with memory registers which allow up to nine complete front panel settings frequency range markers power level etc to be stored and later recalled Instrument settings are stored in memory locations 1 through 9 by pressing SAVEn and 1 or 9 To recall a stored instrument setting press RECALLn and 1 9 The STEP keys may be used to step through the stored registers The instrument settings stored in memory may be recalled remotely in sequence by using the Step Up Advance on pin 22 of the Programming Connector on the rear panel of the 8350A A contact closure to ground or logic 0 is used to implement this function ALTn ALTn causes the 8350A to alternate between the current instrument state and the setting stored in m
226. splays Start Freq GHz 2 Press X 3 The present values of the Start Frequency Stop Frequency and Sweep Time are sequentially interrogated and then printed on the internal printer of the 85A ceat O AEAEE SRTA ISRAEL MNA MI OMAN EY Line 30 Input prompts for start frequency of the sweep Store it in the variable A Line 40 The 85 displays Stop Freq GHz Line 50 Input prompts for the stop frequency of the sweep Store it in B Line 60 The 85 displays Step Size GHz Line 70 Input prompts for the step size of the sweep Store it in C Line 80 Determine the number of frequency steps in sweep store in D Line 90 Set the CW Step Size Line 100 Set the CW frequency to the start fre quency value Line 110 Iterate the CW step D times Line 120 Program the Step increment Up function Line 130 Wait 20 milliseconds for settling Line 140 Continue step iteration Line 150 Go to line 100 The equipment setup is the same as in the previous example Reset the 85 scratch the 85A memory then type in the above program Clear the 85A CRT display then run the program The 8350A will undergo an instrument preset and enable the square wave modulation Then perform the following 1 The 85 will display Start Freq GHz Answer this prompt by inputting the desired Start frequency lue in GHz of the sweep then
227. sting 3 An explanation of each program line 4 Detailed instructions for operating the program to local control prevent this from occurring the Local Lockout LOCAL LOCKOUT command disables all front panel controls specifically the Local key The Go To Local LOCAL command will return the 8350A to front panel control thereby removing it from the remote and local lockout modes Note that the above remote and local commands are different from the general HP IB bus local and remote commands LOCAL 7 and REMOTE 7 Finally in remote control it is peri odically desirable to reset the 8350A to a pre defined state this is achievable with the Instrument Preset function PROGRAM 1 PROGRAM 1 EXPLANATION Line 10 Sets 8350A to remote Line 20 The 9835A displays Remote Line 30 Temporarily stops program execution Line 40 Sets 8350A to remote Line 50 Sets local lockout mode Line 60 The 9835A displays Local Lockout Line 70 Temporarily stops program execution Line 80 Sets 8350A to local Line 90 The 9835A displays Local Line 100 Temporarily stops program execution Line 110 Sets 8350A to remote and performs an Instrument Preset Line 120 Stops program execution To verify and investigate the different remote modes do the following EXAMPLE PROG RAM 2 Programming Functions To program
228. struct the 8350A to issue an SRQ only if a specific set of error conditions exists The set of conditions is determined by a numeric value passed by the Request Mask function his numeric value is generated by summing the decimal values of each Status Byte bit to be checked This program demonstrates the capability of the SRQ and Status Bytes to detect an error condition PROGRAM 7 10 Using Service Requests Status Bytes and Request Mask MMC SISO NM This assumes that the status bits are numbered 0 thru 7 with the least significant bit being number 0 Other references may assume that the bits are numbered 1 thru 8 with the least significant being number 1 if using an 86200 Series Plug in the Status Bytes can provide only limited information Table 1 indicates which Status Byte functions bits are usable PROGRAM 7 EXPLANATION line 10 Clear the status of the 1 Line 20 Clear the status of the 8350 Line 30 Presetthe 8350A to a predefined instru ment state and enable the square wave modulation and set the Request Mask to enable Parameter Altered and Syntax Error SRQ s Line 40 Indicate that if an interrupt from the 98034A HP IB Interface is received that program execution will branch to the interrupt service routine located at the line labelled Srq 50 Line Specify an interrupt from the 980344 if bit 7 decimal value 128 is
229. switches are set to 19 and the interface cable is properly connected If the 85A display indicates an error message it is possible that the above remote message was typed in incorrectly or the ROM s are not properly installed If the 85A accepts the remote statement and the display is clear but the 8350A REMote light does not turn on you could have a defective 82937A or 8350A Perform the operational checks as outlined in the respective Operating and Service Manuals to find the defective device PROGRAMMING EXAMPLES The following sample programs show the various ways of controlling the 8350A In remote control situations the 8350A Sweep Oscillator can interact with the system HP IB controller in two basic ways 1 Listen Mode The 83504 listens to the control commands as to modifying the present instru ment state This effectively commands the 8350A to do a specific event much like setting a front panel function 2 Talk Mode The 8350A informs the controller of the present instrument state with a numeric value or a string of characters This effectively allows the userto interrogate orlearn any 8350A function Each programming example is structured using the following format 2 The program listing 3 An explanation of each program line 1 Ageneral description of the functions exercised 4 Detailed instructions for operating the system EXAMPLE PROGRAM 3 Remote Local Local Lockout and Instrument Prese S sss
230. t 2 MHz Select to cover Frequency range of RF plug in 0 96 to 42 GHz 3 7 to 12 4 GHz HP 536A HP 537A Adapter APC 7 to Type N m HP 11525 Amphenol 131 7018 Adapter APC 3 5 f to Type N m Delay Line Discriminator Refer to Figure 1 3 1 13 General Information Model 8350A Table 1 4 Recommended Test 4 of 4 PC Board Extender RF Plug in Extender Cable Connector J2 RF Plug in Extender Cable Interface Connector J3 piug ins 1 72 RECOMMENDED TEST EQUIPMENT 1 73 Equipment required for testing and adjust ment of the instrument is listed in Table 1 4 Other equipment may be substituted if it meets or exceeds the critical specifications indicated in the table 1 74 HEWLETT PACKARD INTERFACE BUS 1 1 75 The Model 8350 is factory equipped with 1 14 Critical Specifications Recommended Model 44 pin extends printed circuit boards Extends RF Plug in Interface Extends RF Plug in Power Supply I Refer to the Recommended Test Equipmentlist in the Operating and Service Manualofthe RF plug in used fora listing of equipment specifically relating to the RF plug in used Not all equipment included in this list is necessary for all RF 2p Performance Test A Adjustments T Troubleshooting 3Mauray Microwave Corp 8610 Helms Ave Cucamonga CA 91730 4General Radio 300 Baker Avenue Concord MA 01742
231. t all parameters need to be reprogrammed every time NOTE This program expects an 83500 Series Plug in that covers the frequency range of at least 3 to 7 GHz if using a plug in with a different frequency range change the values in lines 60 90 and 100 to the appropriate values If using an 86200 Series Plug in then do not enter line 70 PROGRAM 3 Line 10 Image statement for setting the Start and Stop Sweep frequencies in GHz Line 20 Image statement for setting the Sweep Time in milliseconds Line 30 Image statement for setting a Frequency Marker by marker numberand frequency in GHz Line 40 Image statement for setting the Output Power Level in dBm Line 50 Preset the sweeper to a known state via instrument preset and enable the inter nal 27 8 kHz Square Wave Amplitude Modulation Line 60 SetaStart Stop Sweep of 3 0to 7 0 GHz 3 Re run the modified program using the same operation steps as above Voti TLIO INTTR ISIE ED EGO BRISA om EANNAN ELERAN Line 70 Setthe Output Power Levelto 10 dBm Line 80 Set the Sweep Time to 50 milliseconds Line 90 Set Marker 1 to 4 GHz Line 100 Set Marker 2 to 6 GHz Line 110 Stop program execution Set up the equipment as shown in Figure 2 by adding the 8755C the 180TR or 182T the 11664 and atest device like a4 to 6 GHz Bandpass Filter It is important that the two rear panel connections from t
232. t statement in line 0 to fxd 5 then re run the program Another approach is to utilize the format statement to set the desired number of decimal places To use the format state ment in the program perform the following on the 9825 Press STOP FETCH 4 EXECUTE then DELETE LINE This should delete line 4 from program 2 and allow the use of lines 5 and 6 instead Run the modified program again and use the same steps for operation as before Now if the value inputted has a frequency resolution greater than 1 MHz the 9825 does the rounding instead of the 8350 This is the preferred iSt tt i bot programming approach Change the format state ment for 10 MHz frequency resolution and verify the results from the 8350A frequency display Since a device select code address can be a variable via the Device dev statement verify that this can be used in the modified or original program 2 by doing the following 1 Insert before Line 0 a new line using the dev command by Press STOP FETCH 0 EXECUTE Type dev SWP 719 Press INSERT LINE 2 Modify the write statement s by fetching the necessary lines then change the wit 719 to wrt SWP and wrt 719 1 to wrt SWP 1 3 Re run the modified program using the same operation steps as above EXAMPLE PROGRAM 3 Setting Up Typical Sweep Typically the sweeper is programmed forthe proper sweep frequency range sweep time power leve
233. t the filter transmission response over the 3 to 7 GHz range Two frequency markers of the Z Axis Intensity dot variety are set to 4 and 6 GHz hopefully within the passband or near the 3 dB points The setup can be modified by changing the values in lines 60 70 80 90 and or 100 then re run the program nt State E NM IPAD SSODUIPUT F198 8 ENTER 719 BFHS USIN 219 1L 588 PROGRAM 4 EXPLANATION Line 10 Define the first element in any array to be at index number 1 Line 20 Set the length of the A string to 100 characters Line 30 Set the 8350A to a predefined state via instrument preset and enable the square wave modulation Line 40 Return the 8350 to local control Line 50 Temporarily stops program execution line 60 Program the 8350A to output the Learn String line 70 Read the Learn String into the 9845B using a byte fast handshake transfer of 90 string characters ignoring the line feed as the string terminator Store the 90 character Learn String in A Line 80 Temporarily stops program execution Line 90 Program the 8350A to accept a Learn String then send the new Learn String to the 8350 Line 100 Stops program execution Setup the equipment as in example 3 using the CRT display to verify the sweep settings Note that the original equipment setup can also be used with the 8350A front panel indicators used f
234. te high resolution digital displays indicate all major function values Function values may be set by activating the appropriate pushbutton and using the corresponding knob step keys or data entry keyboard to enter the desired values 1 25 Sweep and Trigger Modes 1 26 The sweep may be triggered INTernally through ac power LINE frequency EXTernally or in SINGLE sweep operation SWEEP TIME is continuously variable from 10 ms to 100 seconds Minimum sweep time may be greater than 10 ms depending upon the specific RF plug in used and the bandwidth being swept A MANual SWEEP function allows the data entry controls to provide continuous manual adjustment of frequency between the end frequencies set in any of the sweep functions direct coupled sawtooth sweep ramp zero to approximately 10 volts is available through both front and rear panel SWEEP OUTPUT SWEEP INPUT BNC connectors 1 27 START STOP Mode 1 28 TheSTART STOP frequency sweep mode selected upon Instrument Preset is indicated by yellow LEDs located above the selected operation pushbuttons this mode the Model 8350A sweeps up from the START frequency to the STOP frequency START and STOP frequencies are indicated on the FREQUENCY LED dis plays START frequency or STOP frequency may then be changed through the use of the data entry controls 1 29 CW Mode 1 30 When CW Continuous Wave mode is selected the instrument is tuned to a single General Info
235. ter transmission response over the 3 to 7 GHz range Two frequency markers of the Z Axis Intensity dot EXAMPLE PROGRAM 4 ROT Being able to save a specific instrument state is helpful when it is needed several times in a test or measurement procedure The user could save the instrument state by manually logging the important sweep parameters such as frequency range power level ALC modes etc then re inputtingthem atthe appropriate time somewhat simpler approach is to save the instrument state in one of the 8350A internal storage registers then recall it when needed However this is not a permanent solution unless the 8350A Non volatile Memory option Option 001 is used A more permanent solution is to use the Output Learn String function ofthe 8350A so thatthe 85A can learn then store a data string that describes the present instrument state on a tape cartridge or in its internal memory Once an instrument state is stored orlearned the 8350 can then be restored to that state using the Input Learn String function The power of these instrument Learn Teach functions are demonstrated by the following program using the 85A fast data transfer function 8350A SWEEP OSCILLATOR 8755 1821 SWEPT 3486 8986 cc RARE s 999 24 Front or Rear 8 DEVICE 11664 UNDER TEST BETECTOR variety are set to 4 and 6 GHz hopetully within the passband or near the 3 dB points The setup can be modifie
236. ters within the Learn String An easier approach is to usethe Output Interrogated Parameter function of the 8350A With this function the 9835 instructs the 8350A to output the present numeric value of a specified function Any function that has a numeric value associated with it can be interrogated Note that if the parameter is not presently active the 8350A uses a computed value or its previous value The following program demonstrates the capability of the interrogate function PROGRAM 5 PROGRAM 5 EXPLANATION Line 10 Set the 8350A to a predefined instru ment state via instrument preset and enable the square wave modulation Line 20 Return the 8350A to local control Line 30 Temporarily stops program execution Line 40 Program the 8350A to output the present value of the Start Frequency g T Present Value i IALIA NIOTEN FILER TOE GET MPO rat 2 Turn the 8350A line power off Wait five seconds then turn the 8350A power back on Press INSTR PRESET on the 8350A 3 Press CONTINUE on the 9835A Verify on the CRT display and or the 8350 that the original instrument state has been restored Of Function eL VU fs eher LE IYER o Line 50 Read the value into the 9835A and store it in the variable A Line 60 Print on the CRT display the present value of the Start Frequency in MHz Line 70 Program the 8350A to outputthe present vaiue o
237. th and seventh bits used to determine when the address is listen bits are 0 1 or talk bits are 1 0 Some controllers distinguish between listen and talk automatically requiring only the 5 bit code equivalent to designate a device 3 39 8350A HP IB MESSAGE RESPONSES 3 40 The 8350A responds to the twelve bus messages as shown in Table 3 4 3 41 8350A HP IB Compatibility 3 42 Table 3 6 lists the 8350A Sweep Oscillators HP IB capability which are compatible with IEEE Standard 488 1975 Operating Information Model 8350A Table 3 5 Possible HP IP Addresses ASCH Characters Address Code Equivalent Listen Talk Binary Decimal Address Address 54321 Oo NAH BW Om Om gt N lt KS MOANA Q g O Z Z ACH TOMO gt AA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 l 1 1 1 I 1 1 1 1 1 1 1 M O QD m OO lt KH OO Oe Or OF OF OH OF O Oo OO HEH m G et et OOO O O OOOO V lI A ae Table 3 6 8350A Interface Functions Source handshake capability Acceptor handshake capability Basic talker Serial Poll Unaddress to talk if addressed to listen Basic listener Unaddressed to listen if addressed to talk Service Re
238. the LOCAL key Removes the 8350A from local lockout and remote HP IB control to local front panel control All functions remain the same as in the remote state The 8350A can set the HP IB SRQ Service Request line if one ofthe following instrument conditions exists and has been enabled by the Request Mask value Testable conditions in clude parameter value altered syntax error end of sweep power failure and RF un leveled Semple Statements Related Comments Interface Function HPL 9825 BASIC 8835 9845 85 Message Tyne Input Data 14 System Trigger TRIGGER 7 lt wrt 719 OUTPUT TIS ENTER 719 A GET DTI Device Trigger trg 719 TRIGGER 719 System Clear RESET 7 DCi cir 719 CLEAR 719 System Remote rem 7 REMOTE 7 RL Device Remote System Local GTL Device Local lci 719 LOCAL 719 LOCAL LLO lio 7 LOCKOUT 7 rds 719 A STATUS if bit 6 A 719 A IF Ske SIME 1 gto A6 1 SRQ THEN Srq 8350 Operating Information Table 3 4 The Twelve Bus Messages 2 of 2 8350 Response 1 ppli Related Message cahle Responds to a Serial with one 8 bit byte with the seventh most significant bit bit 6 of bits 0 through 7 set if the 8350A is Requesting Service Bit 2 indicates a status change has occurred that can be de tected only by analyzi
239. the Model 8350A Table 2 1 Line Voltage Fuse Selection Measured PC Selector Fuse ac Line Voltage Board Position HP Part Number 4 0 2110 0055 90 to 105 volts 40 2110 0055 108 to 126 volts 20 2110 0002 198 to 231 volts 20 2110 0002 216 to 252 volts Installation c Make sure the correct fuse is installed in the fuse holder The required fuse rating for each line voltage is indicated in Table 2 1 and below the power line module on the rear panel of the Model 8350A To prevent damage to the instrument make the correct line voltage and fuse selection before connecting line power to the instrument 2 10 Power Cable 2 11 In accordance with international safety standards this instrument is equipped with a three wire power cable When connected to an appropriate power line outlet this cable grounds the instrument cabinet Table 2 2 shows the styles of plugs available on power cables supplied with HP instruments The HP Part Numbers for the plugs are part numbers for the complete power RECEPTACLE FOR PRIMARY POWER CORB SELECTOR BOARD SHOWN POSITIONED FOR 115 120 VAC POWER LINE Model 8350 cables The type of power cable plug shipped with the instrument depends upon the country of destination Before switching on this instrument be sure that only the specified power cable is used The instrument is provided with a three wire
240. the control settings to be stored in one of the nine internal registers The Recall n function will implement the previously stored settings Alternate n function alternates between current state and register selected on successive sweeps PANEL LAYOUT SAVEn RECALLn ALT n FUNCTIONS INDICATORS SAVE Enables current settings modes frequencies etc to be stored in a register Nine registers are available for storage 1 through 9 RECALL Enables a resetting of one of the nine stored register modes When enabled the registers may be incremented with the UP control or decremented with the down control Registers not previously stored will contain the instrument preset settings Alternate Alternates between current state and selected stored register on successive sweeps If used with appropriate HP 8755C current state response is on channel and selected state response is on channel 2 LIMITATIONS CONCERNS Unused registers have instrument preset values stored until new new values are stored The instrument preset function sets all registers to instrument preset settings except in Option 001 instruments which retain stored settings even with AC power off Remote Step Up Advance Programming Connector or Auto Step allows cycling of storage registers Figure 3 9 Storage Registers 1 of 2 30 Model 8350 Operating Information LOCAL FUNCTION PROCEDURE Function Activate Range and Resolution Recall Settings
241. tion is 0 1 of selected sweep width 980 points across sweep External Sweep Sweep is controlled by a zero to 10 volt sweep ramp external signal applied to the front or rear panel SWEEP OUTPUT SWEEP INPUT connectors Resulting RF Output fre quency accuracy will be a function ofinput sweep ramp accuracy and linearity Sweep Output Positive going direct coupled saw tooth at front and rear panel SWEEP OUTPUT SWEEP INPUT connectors concurrent with swept RF output In CW mode dc output is proportional to the RF plug in unit full band frequency Refer to Table 1 2 MODULATION CHARACTERISTICS External AM Refer to RF plug in unit specifications Rear panel BNC connector internal AM Square wave modulation available at all sweep speeds through front panel control Refer to RF plug in for On Off ratio specifications Refer to Table 1 2 for frequency characteristics External FM Refer to RF plug in unit specifications Rear panel BNC connector GENERAL SPECIFICATIONS Blanking RF Blanking When enabled RF automatically is turned off during retrace and remains off until the start of next sweep Display Blanking POS Z BLANK direct coupled positive rectangular pulse during retrace and bandswitch points of sweep Negative intensity marker signals are also output through this connector NEG Z BLANK direct coupled negative rectangular pulse during retrace and bandswitch points of sweep Both are rear panel BNC outputs
242. trument Preset T STEAL EERE NEA SS ORS rE crine trece ertum remote control that can be used The Remote Enable REMOTE command sets the 8350A into remote control from the local manual mode In remote the 8350A will perform only as its functions are programmed However if the LCL button is pressed the 8350A will return from the remote state to local control To prevent this from occurring the Local Lockout LOCAL LOCKOUT command dis ables all front panel controls specifically the Local key The Go To Local LOCAL command will return the 8350A to front panel control thereby removing it fromthe remote and local lockout modes Note that the above remote and local commands are different from the general HP IB bus local and remote com mands LOCAL 7 and REMOTE 7 Finally in remote control it is periodically desirable to reset the 8350 to a predefined state this is achievable with the Instrument Preset function PROGRAM 1 PROGRAM 1 EXPLANATION Line 10 Sets 8350A to remote Line 20 The 9845B displays Remote Line 30 Temporarily stops program execution Line 40 Sets 8350A to remote Line 50 Sets local lockout mode Line 60 The 9845B displays Local Lockout Line 70 Temporarily stops program execution Line 80 Sets 8350A to local Line 90 The 9845B displays Local Line 100 Temporarily stops program execution Line 110 Sets 8350A to remote and performs instrument Preset
243. tting Up A Typical Typically the sweeper is programmed for the proper sweep frequency range sweep time power level and marker frequencies for a test measurement This program sets up the sweeper for a general purpose situation using several dedicated image statements Note that not ail parameters need to be reprogrammed every time NOTE This program expects an 83500 Series Plug in that covers the frequency range of at least 3 to 7 GHz if using a plug in with a different frequency range change the values in lines 60 90 and 106 to the appropriate values If using an 86200 Series Plug in then do not enter line 70 PROGRAM 3 PROGRAM 3 EXPLANATION Line 10 Image statement for setting the Start and Stop Sweep frequencies in GHz Line 20 Image statement for setting the Sweep Time in milliseconds Line 30 Image statement for setting a Frequency Marker by marker number and frequency in GHz Line 40 Image statement for setting the Output Power Level in dBm 2 Modify the output statement s by editing the necessary lines and changing the OUTPUT 719 to OUTPUT S and OUTPUT 719 USING 100 to OUTPUT S USING 100 3 Re run the modified program using the same operation steps as above Sweep Line 50 Preset the sweeper to a known state via instrument preset and enable the internal 27 8 kHz Square Wave Amplitude Modulation Line 60 Set a Start Stop Sweep of 3 0 to 7 0 GHz Line 70 Set the Out
244. ue key This function enables the shift functions that are labeled in blue on the front panel or required key code in remote HP IB LIMITATIONS CONCERNS 1 Step size not settable for sweep time It is a 1 2 5 data progression like 10 msec 20 msec 50 msec 100msec etc No visable data display for step size values Step size entry is differentiated via units terminator ie frequency or power step All numeric entries are not input entered until the appropriate units terminator is entered A d Do Auto Step via depressing up or down key causes the active parameter to be stepped as long as the key 1s depressed 6 The dBm dB key will be a default value of Hz or sec Figure 3 11 Data Entry Step Keys Keyboard 1 of 2 Model 8350 Operating Information 7 Negative numeric data must be entered with negative sign first 8 Blank and unnecessary negative signs are ignored by the sweep oscillator 9 Someshift functions are not labeled on the front panel References Shift Function section 10 Shift key indicator on until a correct shift function key stroke is entered H The default Step Size values are 0 1 of the present AF for frequency parameters dB for power parameters LOCAL FUNCTION PROCEDURE Data Forms Range and TEA STEP SIZE Frequency Range Frequency Parameter See plug in frequency limits STEP SIZE k Power See nr power limits Resolution Reset to default STEP SIZ
245. ug in manual If the instrument does not pass the above electrical tests if the shipment contents are incomplete or if there is mechanical damage or defect notify the nearest Hewlett Packard office If the shipping container is damaged or if the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for carrier s inspection The HP office wil arrange for repair or replacement without waiting for claim settlement 2 5 PREPARATION FOR USE 2 6 Power Requirements 2 7 The Model 8350A Sweep Oscillator requires a power source of 100 120 220 or 240 Vac 5 to 10 50 to 60 Hz single phase 50 to 400 Hz single phase for Option 400 instruments Power consumption is approximately 270 volt amps depending upon the specific RF plug in unit used 2 8 Line Voltage and Fuse Selection 2 9 Figure 2 1 illustrates the line voltage selec tion card and fuse location in the Power Line Module on the rear pane of the Model 8350A Select the line voltage and fuse as follows a Measure the ac line voltage b Refer to Figure 2 1 At the instrument rear panel power line module select the line voltage 100 120 200 or 220 volts closest to the voltage you measured in step a Note the available line voltage must be within 5 or 10 of the line voltage selection as shown in Table 2 1 If it is not you must use an autotransformer between the power source and
246. unctions and should not be used Figure 2 Data Entry 2 of 2 Local Operation Model 8350A 000 200656 pa Y S 9 096 FREQUENCY This section controls the sweep mode and frequency limits START STOP When either the START or STOP key is pressed the sweep oscillator is put in START STOP mode Swept RF output begins at START frequency and ends at STOP frequency The START frequency must be less than or equal to the STOP frequency The vernier and offset can be used to change the effective center frequency of the sweep Left FREQUENCY display is start frequency of sweep right FREQUENCY display is stop frequency Frequencies may be changed in three ways Frequency controls Provides continuous adjustment Clockwise rotation increases frequency Data entry Can enter specific frequency values from the number units keyboard Step up down enter step size in GHz or MHz using DATA ENTRY keyboard section By first pressing the appropriate key START or STOP and then the UP or DOWN key can now increment or decrement the appropriate frequency sweep limit If a step size has not been entered the function will change by the default value when UP or DOWN is pressed CF CF AF Puts display in mode where swept output is read as a center frequency and frequency sweep width Output is swept from CF AE 2 start frequency to CF AF 2 stop frequency When ch
247. vidual devices design and may vary from device to device Addressing The set of characters sent by a controller to specify which device will send infor mation on the bus and which device s will receive that information device may also have its address fixed so that 1t may receive information listen only or send information talk only Polling The process by which a controller can identify a device that needs interaction with it The controller may poll devices for their operational condition one at a time which is termed a serial poll or as groups of devices simultaneously which is termed a parallel poll Data Bus LA 8 signal fines E Data Byte Transfer Contro HANDSHAKE Lines 3 signa fines Genera Interface Management 5 signal Hines Management CONTROL Lines Figure 3 5 Interface Connections and Bus Structure Model 8350 3 31 Basic Device Communication Capability 3 32 Devices which communicate along the interface bus fall into three basic categories Talkers Devices which send information on the bus when they have been addressed Listeners Devices which receive information sent on the bus when they have been addressed Controllers Devices that can specify the talker and listener s for an information transfer The controller can be an active controller or a system controller The active controller is defined as the current controlling device on the bus The system c
248. works in conjunction with the channel switching circuits in the Model 8755C This permits Channel 1 on the Model 8755C to respond only to the Model 8350A current state and Channel to the alternate state single cable HP Part Number 8120 3174 connects between the Model 8350A rear panel ALT SWP INTERFACE connector and the Model 8755C front panel ALT SWP INTERFACE connector 1 70 Power Meters and Crystal Detectors 1 71 Depending upon the RF plug in unit used the RF output can be externally leveled using the HP Model 432 Power Meter or negative polarity output crystal detectors Refer to the Operating and Service Manual of the specific RF plug in used for detailed information on leveling systems that may be used with the Model 8350A RF Plug in combination NOTE The Model 435A and 436A Power Meters should not be used in Model 8350 ex ternal leveling systems Table 1 3 Model 84108 Source Control Cable 84108 Source Control Cable 8350A Connector Pin 25 pin D Type Male HP Part No 1251 0063 Description L SSRQ Low Stop Sweep Request SYNC TRG High Synchronizing Trigger GND DIG Digital Ground 1 10 HP Part Number 08410 60146 84108 Connector Pin 14 pin Micro Ribbon Male Part No 1251 0142 Wire Color Code 8350 General Information Table 1 4 Recommended Test Equipment 1 of 4 Critical Specifications Recommended Model NC Frequency me 0 01 to 22 GHz HP 8565A R
249. ximately 5 volts during retrace and bandswitch points of sweep No markers are output from this rear panel BNC connector Pen Lift Output Output to control the pen lift function of X Y recorder Maximum sink current is approximately 600ma Rear Panel Programming Connector Additional control of and information on the 8350A instrument state is provided via a 25 pin rear panel connector Output signals such as display and RF blanking X Y recorder pen lift HP 8410B and HP 5343A interface signals Input signals affect the sweep status display and RF blanking pen lift outputs etc Refer to Figure 2 7 for a complete listing of signals and voltages on the rear panel Pro gramming Connector 84108 Interface Cable Permits multi octave opera tion of HP 8410B Network Analyzer with the 8350A order HP Part Number 08410 60146 Connects between 8410B rear panel SOURCE CONTROL and 8350A rear panel PROGRAM MING CONNECTOR Furnished 2 29m 7 5 foot power cable with NEMA plug spare fuses two extender boards for servicing 1 0m 3 3 foot HP IB cable Operating Temperature Range 0 C to 55 C Power 100 120 220 or 240 volts 5 10 50 to 60 Hz Option 400 60 to 400 Hz Approximately 270 volt amps including RF plug in unit depends upon specific RF plug in unit used Weight not including RF plug in unit Net 16 5 kg 36 4 lb Shipping 22 7 kg 50 Ib Dimensions 425 W 133 3 H 422 mm D 16 75 x 525 16 6 in
250. y modified fora non standard frequency range a PROM obtained from the factory must be used in the 11869A Adapter The PROM is inserted in the 16 pin socket on the PC board of the adapter and is needed for proper interfacing and controlling of a non standard plug in Modet 8350A Model 8350 Local Operation 4 MXRA Me MS ALLOI 20008 APPENDIX 3 FRONT PANEL CONTROLS SUMMARY Vernier Offset Vernier function offsets sweep ranges CW or CF frequencies 70 lamp lit when non zero offset or vernier present Right Frequency Control Adjusts AF or STOP frequency Right Frequency Display Displays STOP or AF frequency in GHz or MHz MKR A Allows user to display frequency difference between any two markers and intensifies the appropriate portion of the dis piay Frequency Time Display Display Marker or manual sweep frequency in GHz or MHz Sweep Time in seconds and HP IB address Markers Controls the five independent mainframe supplied frequency markers Save n Recall n Alt n Can save and recall up to nine different settings Data Entry Keyboard Can enter exact values or step sizes for most sweep parameters via the keyboard Output Controis Can control marker dis play mode RF and display blanking and internal square wave modulation of the RF output 10 11 12 14 16 Sweep Mode Selects External Manual Timed sweep mode MARKER
251. y span VERNIER Provides high resolution adjustments to values of the effective sweep center and CW frequencies Range is 0 1 percent of plug in frequency band OFFSET Offset RF frequency by entered value START STOP CF AF and CW displays do not indicate the change Light indicates non zero OFFSET value 0 This lamp indicates when a non zero frequency vernier or offset value is in effect To zero the vernier or offset enter 0 MHz Figure 3 6 Frequency Sweep Mode 1 of 3 21 Operating Information 22 LIMITATIONS CONCERNS 1 The range of frequencies input to mainframe is determined by the plug in will accept values to 2 out of range CW resolution equals 4096 points per band includes 2 overange exceptin VERNIER Example using a 2 to 8 4 GHz plug in 1 6 MHz is the resolution The display range is 1 MHz to 99 99 GHz The order in which START STOP or CFAF are entered is not important START frequency must be lower than STOP frequency Entering a START frequency greater than the STOP frequency causes the STOP frequency to equal the START frequency If the START frequency is greater than the STOP then START equals the new STOP frequency Lights except as noted indicate active values function Frequency values entered do not change when mode is changed Sweep Out provides a 0 to 10 volt ramp for all sweeps with 0 volts corresponding to the effective start frequency and 10 volts to the stop frequency In CW mode
252. y sweep using Marker 1 and Marker 2 as the START STOP frequency limits while maintaining the original START STOP values For greater accuracy marker frequencies can also be counted directly using the HP Model 5343A Microwave Frequency Counter The sweep is momentarily stopped allowing the counter to measure the START STOP or activated marker frequency 1 35 Instrument State Storage 1 36 Up to9 different front panel settings can be stored and recalled in the Model 8350A via the SAVE n n 1 through 9 function The ALT n function causes the RF Output to alternate on successive sweeps between the current front panel setting and the setting stored in the recalled memory location n 1 through 9 This allows the 1 7 General Information Model 8350A to work in conjunction with the HP Model 8755 Frequency Response Test Set to allow two different measurements to be made simul taneously by utilizing two different sweep widths and or power levels 1 37 Modulation Characteristics 1 38 The Model 83504 is capable of internally square wave modulating the RF Output at a 27 8 kHz or 1 kHz selected by an internal jumper modulation frequency as controlled by the front panel Square Wave Modulation pushbutton The RF Output may also be Amplitude or Frequency modulated by an external source via the Model 8350A Sweep Oscillator rear panel inputs 1 39 Remote Programming HP IB 1 40 front panel controls except the line power sw
253. y that the protection has been impaired the product must be made inoperative and be secured against any unintended operation BEFORE APPLYING POWER Verify that the product is configured to match the available main power source per the input power configuration instructions provided in this manual If this product is to be energized via an autotrans former make sure the common terminal is con nected to the neutral grounded side of mains supply SERVICING WARNING servicing adjustment maintenance or repair of this product must be per formed only by qualified personnel Adjustments described in this manual may be performed with power supplied to the product while protective covers are removed Energy available at many points may if contacted result in per sonal injury Capacitors inside this product may still be charged even when disconnected from its power source To avoid a fire hazard only fuses with the required current rating and of the specified type normal blow time delay etc are to be used for replacement General Information Model 8350A crit H E HP 8350A SWEEP OSCILLATOR pae y POWER CABLE POWER CABLE PLUG SUPPLIED DEPENDS ON COUNTRY OF DESTINATION REFER TO SECTION Ii FOR PART NUMBER INFORMATION Figure 1 1 Model 8350A Sweep Oscillator 1 0 Model 8350 General Information SECTION I GENERAL INFORMATION 1 1 INTRODU
254. ype in the above program Run the program The 8350A will undergo an instrument preset and enable the square wave modulation The 9845B then displays CW Freq GHz Answer this prompt by inputting the desired CW frequency in GHz then press CONT Verify that the 8350A CW frequency has been properly programmed Try several values that are out of range of the plug in s frequency limits and verify that an error message was printed on the CRT display The program repeats the above input prompt To stop the program press STOP HP IB PROGRAM CODES Code Description Code Description AKm ALmn A1 A2 A3 BK CAm CF Clm CW CT C2 C3 C4 DF DM DN DPm DUm FA FB Fim F1 GZ HZ IL IP IX KZ MC MDm MO Amplitude Marker On Off MPm Alternate Sweep On Off MS Internal Leveling MZ External Crystal Leveling MO External Power Meter Leveling M1 Backspace a Amplitude Crystal Marker On Off M4 83522 83525 Only M5 Center Frequency Intensity Crystal Marker On Off mu 83522 83525 Only OA CW Frequency OL 1 MHz Crystal Marker Frequency OM 83522 83525 Only OP 10 MHz Crystal Marker Frequency OS 83522 83525 Only OX 50 MHz Crystal Marker Frequency PL 83522 83525 Only PSm External Crystal Marker Frequency 83522 83525 Only RCn Delta F Frequency Span RM dBm RPm Step Down Decrement RS Display Blanking On Off Display Update On Off Exponent Power Of 10 SH Start Frequency Sim Stop Frequency S
255. ys CW Freg GHz input prompts for the desired CW fre quency value in GHz Store it in the variable F Line 4 Setthe CW frequency as determined by F Line 5 Wait 100 milliseconds to allow the 8350A to interrupt Line 6 Co to line 3 Line 7 Location of the interrupt service routine Read the Status Byte of the 8350A and store it in A Line 8 Check bit 6 ofthe 8350A Status Byte to see if it generated the SRQ go to line 12 if not Line 9 Check bit 0 of the 8350A Status Byte for a Parameter Value Altered error indication Print on the internal strip printer Value Altered if one exists Line 10 Check bit 5 of the 8350A Status Byte for a Syntax error Print on the internal strip printer Syntax Error if one exists Line 11 Clear the 83504 status to enable another SRQ Line 12 Re specify and re enable interrupts from bit 7 of the 980344 return from the inter rupt service routine to the main program The equipment setup is the same as the previous example Reset the 9825 memory then type in the above program Run the program The 8350 will undergo an instrument preset and enable the square wave modulation The 9825 then displays CW GHz Answer this prompt by inputting the desired CW frequency in GHz then press CONTINUE Verify that the 8350 CW frequency has been properly programmed Try several values that are out of range of the plug in s frequency limits and verify that
256. yte value where with each bit position corresponds to thesame bit position as in the 8350A Status Byte If in the Request Mask byte a bit is set logical 1 then this condition is enabled for generation If the bit value is cleared logical 0 then the bit is ignored The Request Mask value ranges from decimal 0 to 255 where the decimal value can be determined by summing the decimal values of each Status Byte bit to be enabled the user need not select the RQS bit The default at power is a Request Mask byte of 00000000 or decimal 0 The Request Mask is reset to the default value at power on only and is not affected by an Instrument Preset NETWORK ANALYZER TRIGGER 8410B This causes an external trigger pulse to be generated for the HP 8410B Microwave Network Analyzer to re phase lock on the present RF signal This is used to insure proper HP IB operation in stepped CW frequency sweeps to guarantee that the 8410B 1s phase locked at the proper RF frequency after CW settling RESET SWEEP This aborts the present single sweep that is in progress and resets the sweep so that it can be triggered again This function is enabled only ifthe 8350A is in the Single Sweep Trigger mode and has the same effect as programming a single sweep trigger 4 TAKE SWEEP This triggers a single sweep This function is enabled only if the 8350A is in the Single Sweep Trigger mode and has the same effect as programming a single sweep trigger
257. zer Power Meter Power Range 20 to 10 dBm HP 432A No substitution when used for external power meter leveling General Information Thermistor Sensor Frequency Counter Directional Coupler Directional Coupler RMS Voltmeter Function Generator Crystal Detector Air Line Extension 2 required RF Cable Step Attenuator Model 8350A Table 1 4 Recommended Test Equipment 2 of 4 Critical Specifications Recommended Model D Frequency Range 0 01 to 12 4 GHz Maximum SWR lt 1 75 Frequency Range 0 01 to 12 4 GHz Sensitivity lt 20 dBm Maximum Input Power 20 dBm Frequency Accuracy lt 1 kHz Frequency Range 0 1 to 2 0 GHz Nominal Coupling 220 dB Maximum Coupling Variation Xl dB Minimum Directivity 232 db Frequency Range 2 to 12 4 GHz Mean Output Coupling gt 20 dB Output Coupling Variation lt 1 dB Minimum Directivity 226 dB dB Range 20 to 70 dBm 0 dBm 1 mW into 600 Ohms Frequency Range 10 Hz to 10 MHz Accuracy 5 of full scale Frequency Range 0 1 Hz to 10 MHz Output Level 10V p p into 50 Ohms Output Level Flatness X396 from 10 Hz to 100 kHz lt 10 from 100 kHz to 10 MHz Frequency Response 0 01 to 12 4 GHz Maximum Input Power 2100 mW Impedance 50 Ohms Frequency Range de to 12 4 GHz Reflection Coefficient 0 018 0 001 times the frequency in GHz Impedance 50 Ohms Length 61 cm 24 in Frequency Range dc to 12 4 GHz

HP 8350A User's Manual

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