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HP 842M User's Manual

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1. Knob Hold Knob Increment Knob cursor left Knob cursor right kHz Modulation Frequency Message Modulation Output Leve millisecond mv MHz Tactive function code 2Function should be preceded by an activa function code For example internal modulation source for AM is coded AMNT STthese codes will sometimes not need to be preceded by an active function code Jor example when using UP or ON with SV RC HP or SM 1 89 1 16 WRITING MESSAGES TO DISPLAY You can write messages to the Signal Generator s display using service special functions and ASCH character codes Two separate 49 character message strings can be easily displayed on the front panel or read via HP IB Messages such as these could be useful for example when keeping track of calibration times or the owner of the instrument or special calibration information Also when testing instruments a message could be used as a system prompt These messages are battery backed up and can be stored through power off to be read any time Service Special Functions 653 through 659 manipulate message 1 Special Function 663 through 669 manipulate message 2 Note that accessing service special functions is different than accessing the user special functions discussed previously in this manual To select user special functions you key in SPCL SHIFT and then the special function number To select service special funct
2. PARAMETER CHANGED Previous setting has been automatically changed for example FM is turned off when M becomes active Reset with an output Parameter Changed message HP IB program code OC Parameter that was changed can be determined by transmitting the Output Parameter Changed message code or string Refer to the exampie program in Data Output in this HP IB in formation section Aiso reset with IP CS Device Clear Selected Device Clear Power On Bit 1 is cleared only if al hardware errors are resolved Zu that bit was causing SAO to be pulled you must also read the Status Byte again to actually reset that bit This second reading will still show the error because ING error IS cleared only after the reading SYSTEM CONTROLLER The 8642 can be configured to perform as a system controller when in its service mode of operation Perform the following steps to configure the 8642 to output test results to a printer connector to the HP IB Interface connector 1 Press SHIFT then number 3 push buttons 2 Press 8 8 then Hz push buttons 3 Press 3 3 0 then Hz push buttons 4 System Controller is now activated 5 Press 8 9 then Hz push button to deactivate 1 86 ADDITIONAL HP IB INFORMATION Abort Abort abruptly terminates all listener talker activity on the interface bus using the Interface Clear IFC bus line and prepares all instruments to receive a ne
3. TREE 3 315 Cable Flug W7P3 SIgnat Locator susen 3 318 A5J7 Signal Locator Solder Side View ennenrnvonnonnesenrrrervrnvannennvererr 3 321 Cable Ping W7P2 Signal Locator Lanserer 3 324 A517 Signal Locator Solder Side View eese eren 3 326 A14 Heterodyne Module Diagnostics venenonrrnonnronennvnvrvnnersnrvernnnnnnnerne 3 331 Cable Plug W11P2 Signal Locator as sssisiccstaccessvestaiexseetindesissessteadaczsviws 3 347 ASJ8 Signal Locator Solder Side View eos 3 349 Cable Piug W11P2 Signal Locator de een 3 353 ASJ8 Signal Locator Solder Side View sacunnorrasensnsevnersersseninessenneneenn 3 357 A19 Doubler Attenuator Module Diagnostics mervrrenenoreerevernervenenenene 3 369 Exceptional Cases Troubleshooting Diagram 3 379 REP EE 4 17 Mechanical e EE 5 29 No 3G 3 3G 4 3G 100 3H 1 3H 2 3H 3 3H 4 3H 100 31 1 31 2 31 3 31 4 31 100 33 1 35 2 TABLE OF CONTENTS Continued FIGURES Continued Page fable Ping W2P2 Signal E 3 161 A532 Signal Locator Solder Side View ENNEN 3 163 AT SAWR Loop Module Diagnostics EEN e 3 167 Cable Pug W3P2 Signal Locator 4 iere e pese pared conr dodo orate Ed eg 3 184 Cable Plug A513 Signal Leger NEE 3 187 Cable Plug W3P2 Signal LOCABIOE eiiecscaeeneskap a insere tn PUE ANE Eva araia 3 190 ASI3 Signal Locator Solder Side View ENEE EEN EN 3 192 A9 IF Reference Module Diagnostics see ENEE NENNEN EEN 3 197 Cable Plug
4. Oa 0 1 02 Safety Considerations io ege eege I RI eege 0 1 0 3 Instruments Covered by This Manual ee ENEE 0 1 0 4 Description e eosnevvvossern nenenrnneennnnavnneverenevennennsanansennannnenner 0 1 0 5 Warranty Information eseseessossonrenseoss vnnanennenseraenepnaresevanesasenee 0 2 0 6 Equipment That Can Be Ordered for the Signal Generator 0 2 0 7 Module Exchange Program eeeeesrunerasvenvrnnnnenerennnnennvnnnenennennenner 0 2 0 8 Storage Eege 0 2 O 9 Packaging scsvedecscseaceacacsuresasscccenscbusiwe venues shsnsanevanoessseasesiaens 0 3 0 10 Recommended Tools and Test Equipment een 0 3 0 11 Technical Characteristics ssereonoererarrvenraonannnenesnavnnnnerasnasenssaseen 0 5 SECTION I OPERATING INSTRUCTIONS 1 1 Description and Use of Operator s Controls Indicators and COE o E 1 1 1 2 her se ae 1 21 1 3 EE steiere geed 1 21 1 4 Preparation For Use ee ENNEN REESEN NEEN REENEN EENEG 1 21 Power Requirements orronernsansnnnnennnnnannnnassesavennnunesnnennenenes 1 21 Power Cables suse dan rer EE 1 23 HP IB Address Selection sugsmyrendsesmsenni SEV aae Fre hare nag 0 223 heretter 1 23 Mating Connectors rerenenenveveanernernnnenrnananennerresanannesennnnenee 1 23 Operating Environment ee ENEE 1 25 1 5 Operation under Usual Conditions EE 1 25 1 6 Turn On Procedures ENES NE VE 1 25 1 7 Operating Messages rerenennnrnnevernerarenonnnnnrnnenana
5. Operation Kap P e Ke e 3 E 3 2 HP 8642M Synthesized Signal Generator EN HP 8642M SYNTHESIZED SIGNAL GENERATOR OPERATION AND SERVICE MANUAL SERIAL NUMBERS This manual applies directly to instruments with serial numbers prefixed 2625A For additional information about serial numbers see INSTRUMENTS COVERED BY THIS MANUAL in Section 0 General information First Edition HEWLETT PACKARD COMPANY 1987 EAST 24001 MISSION AVENUE TAF C 34 SPOKANE WA U S A 99220 Manual Part Number 08642 90268 Printed September 1987 U Packaro A ATTENTION Static Sensitive Devices This instrument was constructed in an ESD electro static dis charge protected environment This is because most of the semi conductor devices used in this instrument are susceptible to dam age by static discharge Depending on the magnitude of the charge device substrates can be punctured or destroyed by contact or mere proximity of a static charge The results can cause degradation of device performance early failure or immediate destruction These charges are generated in numerous ways such as simple con tact separation of materials and normal motions of persons work ing with static sensitive devices When handling or servicing equipment containing static sensitive devices adequate precautions must be taken to prevent device damage or
6. MF if source is FMNT FMXA or SP112 START RAT EE H BESIRED wn d DESIRE PM ON ATTENUATDOA RANDE T P s MOOULATION AP DATA UNITS FR DATA UNITS BELTET ET ON FOR THIS DESIRE PM ON AP SETT ING PM DATA UNITS i PM Source DESIRE AM OH AM DATA UNITS i 1S Fw DESIRED with N wn HODULATIDN SCUACE oF A FRNT Fei OR risk pt MF DATA UNITS FB DATA UNITS Sate FM DATA UNITS EM Modulation Sources include FMNT FMXA FMXD FMBA FMBD SP5 SP112 4M Modulation Sources include PMNT PMXA PMXD BMBA PMBD Figure 1 5 Flowcharts for Sequence Dependency 1 74 DATA INPUT Continued Valid Character Entry When entering data over HP IB the data entry can take the form of Implicit point notation for example 100 MZ or Fixed Point notation for example 100 0 MZ or Exponential notation for example 1000E 1 MZ Each function has an HP IB data entry limit of 10 mantissa digits and 2 exponential digits exponential notation is optional For example the following entries for 100 MHz will be accepted 1000000000E 01 HZ 1000000000E 1 HZ 1000000000E 4 KZ However these entries for 100 MHz will not be accepted 10000000000E 02 HZ this entry will be accepted as 10 MHz 100000000E 006 MZ this entry won t be accepted and could cause problems in subsequent data entries Only the following data inputs are recognized over HP IB by the Signal Generator all other Characters are ignored
7. Used to activate Phase modulation mode When using internal source push SHIFT FM then INT to activate internal modulation oscillator Push SHIFT FM and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter a M deviation from 0 to 100 radians When external signal source is used for M mode press SHIFT FM and enter 0 to 100 radians for a 1 volt peak signal applied to M connector Actual M deviation is controlled by amplitude of input signal and M deviation selection M deviation is shown with a cursor above display indicating it is the active function May be used simultaneously with either AM or Pulse Modulation Used to enter a new increment value or display a previously stored increment value Push to display stored increment Press and use numeric push buttons to enter a new increment TUNE KNOB or STEP push buttons can increase or decrease selected functions by INCR SET stored value Both frequency and amplitude functions can be entered CONTROL INDICATOR KEY OR CONNECTOR FUNCTION l m 19 19A SET SEQ 20 20A REL OFF 2i SEQ push button OFF ON push button MOD FREQ push button The EMF mode enables you to display and enter amplitude values in EMF units Press SHIFT INCR SET then OFF ON push button to activate EMF mode The EMF amplitude is set by selecting the desired AMPTD function The SEQ push button enables you to sequentially step through
8. AP SWP PREVENTS SP4 E73 4073 Special Function 4 ALC OFF is not possible during amplitude sweep Turn off amplitude sweep HP IB AAOF ABOF before selecting ALC OFF HP IB SP4 SP4 PREVENTS AP SWP E74 4074 Amplitude sweep is not possible when Special Function 4 ALC OFF is selected Select Disable ALC OFF Special Function 204 before selecting amplitude sweep SP9 LIMITS MIN AMPTD E75 4075 Special Function 9 Attenuator Range Hold limits the minimum SES that can be selected To resolve this problem either 1 Select Attenuator Range Hold Off Special Function 209 or 2 Select an amplitude within the held amplitude range selected or 3 Refer to sequence dependency in paragraph 1 15 SP9 LIMITS MAX AMPTD E76 4076 Special Function 9 Attenuator Range Hold limits the maximum amplitude that can be selected To resolve this problem either 1 Select Attenuator Range Hold Off Special Function 209 or 2 Select an amplitude within the held amplitude range selected or 3 Refer to sequence dependency in paragraph 1 15 AMPTD SP9 LIMIT MAX AM E77 4077 The amplitude selected with Special Function 9 Attenuator Range Hold limits the maximum value of AM that can be selected To resolve this problem either 1 Select Attenuator Range Hold Off Special Function 209 or 2 Reduce the amplitude setting to get the desired AM setting or 3 Select an AM setting allowed with the held range and amplitude setting selected or 4 Refer to
9. Clear Lockout Set Local The Clear Lockout Set Local message is the way the controller sets the Remote Enable REN bus control line false The Signal Generator returns to local mode when it receives the Clear Lockout Set Local message No instrument settings are changed by the transition from remote to local When in local lockout the Signal Generator can be returned to local only by the controller using the Local or Clear Lockout Set Local messages or by setting the Power switch to Standby and back to on or by removing the bus cable NOTE Retum to local while in local lockout can be accomplished by switching the POWER from STBY to ON Returning to local control in this way has the following disadvantages It defeats the purpose and advantages of local lockout that is the system controller will lose control of a system element e Instrument configuration is reset to the power up conditions SERVICE REQUEST The Signal Generator uses its internal Status Byte and a Request Service Mask Byte RQS mask that you set to issue a Service Request SRQ bus line true ROS MASK The RQS mask is an 8 bit byte that you can set to define which bits of the Status Byte will be allowed to cause a service request See Figure 1 6 Bits 0 through 5 and 7 of the Status Byte are logically ANDed with bits 0 through 5 and 7 of the ROS mask byte If the resultant value is not equal to zero the Signal Generator sets bit 6 of the Status Byte true w
10. Push for on Selects an external dc coupled signal and internal modulation oscillator signal to be summed together to modulate the Signal Generator RF Output Selects an external ac coupled signal to modulate the Signal Generator RF Output External signal is connected to AM PULSE FM M connector Push for on Selects an external ac coupled signal and internal modulation oscillator signal to be summed together to modulate the Signal Generator RF Output Selects Signal Generator internal modulation oscillator to modulate the RF Output Push for on Used for remote operation only Displays or changes service request status byte value Press SHIFT then INT push button to display present value Press SHIFT INT desired decimal number from 0 to 255 then HZ uV push buttons to enter new value 14 15 1 8 CONTROL INDICATOR OR CONNECTOR FM M connector AM connector FUNCTION BNC female connector with 600 ohms input impedance used to connect an externally supplied DC to 100KHz 1 volt peak 5 signal for frequency modulation of Signal Generator RF output FM deviation is selectable from 300KHz to 1 5MHz for a 1 volt peak signal Also used for phase modulation BNC female connector with 600 ohms input impedance used to connect an externally supplied DC to 100KHz 1 volt peak 5 signal for amplitude modulation of Signal Generator RF output AM Depth is selectable from 0 to 99 995 with 1 volt peak signal AMPTD
11. SH should only be used with the Display Output capability or to get back the normal display of instrument settings HP IB code SHSH Refer to Output Display information in paragraph 1 15 INVALID TERMINATOR E17 4017 This message 1s never displayed locally HP IB Invalid terminator received Send correct terminator code for function you are trying to set BAD PREFIX RECEIVED E18 4018 A bad prefix has been detected by the Signal Generator Terminator push buttons do not have shift functions HP IB The Signal Generator received a set of characters that cannot be recognized Send a valid HP IB code or use the HP IB Device Clear command and try again MAXIMUM OF 10 DIGITS E19 4019 This message is never displayed locally HP IB The Signal Generator ignored some digits in the entry Only send 10 digits including significant leading zeros NUMBER OUT OF RANGE E20 4020 The attempted setting exceeds a numeric value which can be represented internally as a number Select a value within the Signal Generator s settable range AMPTD LIMITS MAX AM E24 4024 The amplitude setting limits the maximum AM setting Reduce either the amplitude setting or the attempted AM setting and try again AM LIMITS MAX AMPTD E25 4025 The AM setting limits the maximum amplitude setting Reduce either the AM setting or the attempted amplitude setting and try again ONLY INT EXT DC PULSE E26 4026 Only an internal or external dc source is possible w
12. for frequencies from 528 750001 to 1057 500000MHz 0 5 for frequencies from 1057 500001 to 2000MHz Calculate the minimum posstble non zero frequency sweep span for a desired sweep time setting as follows Minimum non zero frequency sweep span in Hz equals the maximum of 1 Hz or 0 2 Hz per second l Divide Number X Sweep Time in s e If the result is not an integer use the next highest integer Calculate the maximum frequency sweep span for a desired sweep time setting as follows e Maximum frequency span in Hz equals the minimum of 400 000 Hz Divide Number or 500 kHz per second INTEGER OF Cie ber X Sweep Time in ms SWEEP TIME CALCULATIONS Continued Calculate the minimum fastest sweep time setting for a desired non zero frequency span as follows Minimum sweep time in msec equals the maximum of 5 msec or Start Frequency in Hz Stop Frequency in Hz X Divide Number X 0 002msec If the result is not an integer number of msec use the next highest integer number of msec Calculate the maximum slowest sweep time setting for a desired non zero frequency span as follows Maximum sweep time in sec equals the minimum of 999 sec or Start Frequency in Hz Stop Frequency in Hz X Divide Number X Ssec Calculate the required sweep time to select a desired number of X axis steps 1023 maximum as follows Desired Number of Steps X Imsec 3 Calculations for Amplitude Sweep
13. levels attainable Turn off Attenuator Range Hold with Special Function 209 and or reduce AM to a depth that will allow the amplitude setting or refer to sequence dependency in paragraph 1 15 FUNCTION OFF NO STEP E10 4010 The active function is off so its value cannot be stepped Turn on or set the active function to a valid setting before using the Step push buttons FUNC DISALLOWS OFF ON E11 4011 The active function cannot be tumed off or on You attempted to turn off or turn on either FREQ MOD FREQ or sweep TIME SHIFT START FREQ HP IB codes FR MF or ST ONLY OFF ON IS ACTIVE E12 4012 Oniy the OFF ON push button can be selected Select an active function other than PULSE SHIFT AM EMF SHIFT INCR SET or KNOB HOLD SHIFT lt before entering data HP IB Don t send data immediately after selecting PL EM or KH NO ACTIVE FUNCTION E13 4013 Currently no function is active Select an active function and then try your setting again NOTHING TO BACKSPACE E14 4014 There is no data in the display to backspace Select an active function before using BACK SP 1 32 NO CURSOR TO MOVE EIS 4015 Currently no function is active so no cursor can be moved Select an active function to activate the Knob before attempting to move cursors INVALID SHIFT FUNC E16 4016 The push button you have selected cannot be preceded by the SHIFT push button Select a valid shift function HP IB Select the proper function code without SH
14. press SHIFT then INSTR PRESET push buttons 2 If frequency reference value is to be transferred from present frequency output Venfy displayed frequency value is the desired reference value e Press SHIFT then AMPTD push buttons NOTE Frequency that was present in display is now stored reference value Displayed frequency will be zero All subsequent frequency entries will now be offset from the reference setting stored gt Verify FREQ and REL annunciators are on 3 If frequency reference value is to be entered Ki Press SHIFT then FREQ push buttons and enter the desired reference setting NOTE Displayed frequency and all subsequent frequency entries will now be offset from the reference setting entered in previous step Verify FREQ and REL annunciators are on 4 To deactivate Relative Mode press SHIFT then OFF ON push buttons 1 12 SELECTING SPECIAL FUNCTIONS HELP FUNCTION 1 On Signal Generator press SHIFT then STEP UP push buttons 2 Select the desired mode of accessing special function descriptions 0 through 251 e Use Tune KNOB to scroll past special functions L4 Use STEP UP push button to increment to the next special functions number and description Enter the number of the desired special function to be viewed NOTE Help function only allows the operator to view numbers and descriptions of special functions and does not activate the special function mode 3 Press SHIFT
15. to 99 9 to 1057 SMHz in 0 1 increments Frequency Response een DC to 100K Hz external 20Hz to 100K Hz internal Se ia Me 0 1 per mv peak into 6009 Maximem input Level EE 20 volts 30 seconds Distortion E lt 1 5 30 depth lt 3 30 to 70 depth and lt 5 70 to 90 depth modulation at a 1KHz rate to 1057 SMHz Incidental M en 0 2 radians 30 depth 1KHz rate in a 0 3 to 3KHz post detection noise bandwidth Impedance sene 6000 10 AM Input Connector eege Seet roues Female type BNC coaxial connector Frequency Modulation Frequency Response o ceca DC to 100K Hz external 20Hz to 100K Hz internal in 1 increments Deviation 300K Hz 30MHz to 132 1875M Hz 375K Hz 132 1875MHz to 28 75MHz and lt 1 5MHz above 528 75MHz for a modulating rate between DC and 100K Hz Sensitivity ccu I volt peak into 6000 10 for maximum deviation Maximum Input Level TRUE ERROR EE CIRCE 20 volts 30 seconds Distortion 4 for maximum DC Coupled deviation 2 for 1 2 maximum DC Coupled deviation and 0 4 for l 15maximum DC Coupled deviation for a modulating rate between 20Hz and 100KHz Incidental AM lt 0 3 2400KHz carrier 20KHz peak deviation 1K Hz rate Impedance AT 60022 10 FM Input Connector meeroneerserrnvvnrnnnenverersenneren Female type BNC coaxial connector Pulse Modulation Operating range MM steer ark eegene 10MHz to 20
16. which is also described in Data Output The messages that can be output using OE or OH can also be made to issue a Service request Messages are displayed in a format that shows the wording of the message followed by an alphanumeric code Alphanumeric codes combine a letter and a number for example C31 The message listing lists the messages as they are displayed with the alphanumeric code to the right of the message wording not to be confused with the message code number in the right margin of the listing The messages are listed in alphanumeric order When Using the Instrument Locally You will usually be able to view each message whenever the Signal Generator is ready to give you information That is you don t need to do anything to the instrument to see a message However when you execute some instrument functions a message is queued up and can be displayed using the MSSG push button these messages are noted in the listing The MSSG annunciator in the right portion of the display notifies you that a message is queued up To read queued up messages just select the MSSG push button repeatedly When you read END OF MESSAGE LIST 00 you know there are no more messages in that list When Controlling the Instrument via HP IB You can access most of the messages using the OC OE and OH commands Messages accessed this way can be output in the form of a message code number or as an actual alphanumeric message string In the me
17. 264 375MHz 50 radians from 264 375MHz to 528 75MHz 100 radians from 528 75MHz 2 to 1057 5MHz 200 radians from 1057 5MHz to 2 0GHz Bandwidth DC to 1SKHz external DC coupled and 20H2 to 15KHz internal and external AC coupled Resolution 0 7 of setting or 0 0004 of maximum deviation whichever is greater Kl Lee 5 of setting 0 09 radians at IKHz rate B cip va he lt 0 4 at 1KHz rate External Sensitivity EE 1 volt peak for selected peak phase deviation Maximum Input Leyel EEE EE 15 volts 30 seconds Impedance lede 50Q 5Q 10Hz to 200K Hz e M Input Connector EEN Female type BNC coaxial connector Internal Modulation Oscillator Frequency Fa ae AD 20Hz to 100KHz Eet 1 of setting Fe An 2 of setting Output Level Ranges Los RES 0 to 3 volts peak into 6002 Quibat Level RESO IUGR see 4mV Output Level Accuracy within I sec 55 esses ubso napa e ee 4 15mV Distortion gt 0 5V peak lt 0 02 20Hz to 15 8K Hz lt 0 15 15 8KHz to 100K Hz Rent Ree 6002 Output Connector ett ee eee Female type BNC coaxial connector REAR PANEL CONNECTOR SPECIFICATIONS Interface Connector Type ANSI IEEE Standard 488 1978 interface with SHI AHI T1 2 5 or 6 L1 2 3 or 4 SR1 RL1 PPO DC1 ETO and CO functions implemented Convo eder All front panel functions except power switch and increment knob may be controlled through the interface ARIS COME nede 0 10Vdc 10 Z Axis Connec
18. 3 161 ASJI2 Signal Locator Solder Side View errnerrrrnornrorenrrnrrarnnrnvnnnnnnnne 3 163 AT SAWR Loop Module Diagnostics 55 ore cr uet escete ane dagegen 3 167 Cable Plug W3P2 Signal LOCaIOI weeder deeegg eege eege 3 184 Cable Plus A513 SPRA LOCRIOP ss oceani peo teers agua ee 3 187 Cable Plug W3P2 Signal Locator sereversesenovnenenvnnenservvsennsanssevnavnnsenrn 3 190 A513 Signal Locator Solder Side View EEN 3 192 A9 IF Reference Module Diagnostics esee eene 38 197 Cable Plug W4P2 Signal Locator ENEE 3 206 A5J4 Signal Locator Solder Side View essere 3 209 Cable Plug WAP2 Signal Locator Seene Ee 3 212 A5J4 Signal Locator Solder Side View enrrnrnrnrvrnvvvanernrnnnnnvvenenerr 3 214 All Reference Loop Module Diagnostics AE 3 229 Cable Plug WSP2 Signal Locator eege ee GENEE 3 238 ASJS Signal Locator Solder Side View s eese sees 3 242 Cable Plog WSP2 Signal LOG T Gees 3 246 ASIS Signal Locator Solder Side View scene 3 248 A12 Sum Loop Divider Module Diagnostics e 3 263 Cable Plug W6P2 Signal Locator ane 3 279 ASJ6 Signal Locator Solder Side View ENNEN EEN 3 283 Cable Plug W6P2 Signal Locator usus EE Gu ou 3 286 ASJ6 Signal Locator Solder Side View eee lesse 3 288 A13 Output Filter ALC Module Diagnostics eese 3 293 Cable Plog WIF2 Signal E 3 312 A517 Signal Locator Solder Side View
19. 74 SUBEND Change SUB Ehange COM Gen addr Gen OUTPUT Gen OC ENTER Gen kKssg code PRINT USING 560 Mssg code IMAGE CHANGE CODE K ENTER Gen Mss 1 74 PRINT Mssg 1 74 SUBEND Hardware SUB Hardware COM Gen addr Gen OUTPUT Gen DE ENTER Gen Mssg code IF Mssg code 0 THEN 690 ENTER Gen Mssg code PRINT NO HARDWARE MESSAGE FOUND GOTO 7 PRINT MESSAGE CODE Mssg code ENTER Gen Mssq code i IF Mssg_code lt gt 0 THEN 690 i ENTER Gen MssgSf1 74 i H Get message ENABLE IMTR 7 PRINT MssgS 1 74 IF MssgS 1 191 END OF MESSAGE LIST THEN 760 GOTO 720 SUBEND I DEFINE 8642 ADDRESS COMMON AREA TO STORE GEN ADDRESS FOR SUB S I DIMENSION SPACE TO ENTER IN MESSAGES READ STATUS BYTE CHECK MESSAGE BIT CHECK MESSAGE BIT CHECK MESSAGE BIT OUTPUT DE COMMAND t READ MESSAGE CODE f PRINT MESSAGE CODE READ MESSAGE PRINT MESSAGE t OUTPUT OC COMMAND 1 READ MESSAGE CODE PRINT MESSAGE CODE READ MESSAGE 1 PRINT MESSAGE 1 OUTPUT OH COMMAND READ MESSAGE CODE 1 CHECK IF CODE 0 t READ MESSAGE CODE PRINT NO MESSAGES PRINT MESSAGE CODE READ MESSAGE CODE CHECK IF LAST READ MESSAGE PRINT MESSAGE I LAST MESSAGE GO FOR NEXT MSGE LOCAL LOCKOUT SET LOCAL Local Lockout The Local Lockout message is the way the controller sends the LLO bus command The Signal Generator responds to the Local Lockout message by disabling the front panel LOCAL push button
20. A5J8 Signal Locator Solder Side View scccceccecccceceneeseenesccncceeenes 3 357 A19 Doubler Attenuator Module Diagnostics ENEE 3 369 Exceptional Cases Troubleshooting Diagram cecus 3 379 Repiacine Module sag 4 17 Mechanical Procedure Diagrams iiie ee ea es ead eas suns svi ae Nas Rra ua pr CES Dare SERA Rr UE 5 29 xi xii BLANK Section 0 GENERAL INFORMATION 0 1 SCOPE This manual contains operation and service instructions for the Hewlett Packard Model 8642M Signal Generator 0 2 SAFETY CONSIDERATIONS This product is a Safety Class I instrument that is one provided with a protective earth terminal Before operating or servicing the Signal Generator personnel should familiarize themselves with both the safety markings on the equipment and the safety information presented at the beginning of this manual 0 3 INSTRUMENTS COVERED BY THIS MANUAL Serial Numbers Attached to the instrument is a serial number plate The serial number is in this form 0000A00000 The first four digits and the letter are the serial prefix The last five digits form the suffix that is unique to each instrument The contents of this manual apply directly to instruments having the same serial prefix es as those listed at the beginning of this manual Manual Updates An instrament manufactured after the printing of this manual may have a serial prefix that is not listed at the beginning of this manual
21. Allows for access to the functions labeled in blue To bypass the power up checks press and hold SHIFT push button down during power up until instrument settings are displayed Pressing Shift twice clears any messages and returns the display to showing normal instrument settings Sets the Signal Generator to an initialized state Push for on 1 3 KEY SA CONTROL INDICATOR OR CONNECTOR PARTIAL FUNCTION Sets the Signal Generator to another initialized state without affecting certain instrument settings RF Frequency Amplitude Reference EMF Mode and Sweep Mode are not affected AM Depth FM Deviation Phase Deviation Pulse Modulation Modulation Output Level Start Frequency Stop Frequency Frequency Reference Start Amplitude and Stop Amplitude are turned off but previously entered values remain Push Shift then INSTR PRE SET for on 74 8 CONTROL INDICATOR OR CONNECTOR POWER switch STOP FREQ push button START FREQ push button MODULATION SOURCE Luma ROS MASK NT INT VIEW B FUNCTION Changes Signal Generator from standby to on Push in for on and push in again for standby Used to enter or display a stopping frequency in sweep mode Press to display present stop value in the display Press and use data entry push buttons to enter a new stop frequency Stop frequency may be less than or greater than start frequency Used to activate sweep circuitry but does
22. C42 2042 Increment setting adjusted Amplitude reference setting adjusted i Changing between EMF and non EMF amplitude modes could cause the increment and or amplitude settings to be reset to allowable values NEXT STEP NOT POSSIBLE EI 4001 Next step is not possible The current setting cannot be stepped up or down as attempted with the increment set value To clear the message without changing instrument settings select the SHIFT push button twice If you want to read a message that might more specifically describe the setting problem attempt a data setting similar to the step attempt that caused this error message NOT POSSIBLE ABOVE MAX E2 4002 Not possible above the maximum setting ever allowed The attempted setting is above the function s maximum possible setting independent of other functions NOT POSSIBLE BELOW MIN E3 4003 Not possible below the minimum setting ever allowed The attempted setting is below the function s minimum possible setting independent of other functions SELECT MOD PREFIX FIRST E4 4004 Select the type of modulation first A modulation source was selected when a modulation setting was not displayed Before selecting the modulation souxce select any of the following modulation types AM FM M SHIFT FM or PULSE SHIFT AM HP IB Specify the modulation type code AM FM PM or PL before the modulation source prefix code NT XA XD BA or BD 1 31 SELECT SWP PREFIX FIRST ES 4005 Sel
23. Calculate number of steps automatically selected as follows The number of steps is the minimum of Start Amplitude in dBm Stop Amplitude in dBm 0 1 dB Or INTEGER OF Lea Time Co me 1 3 ms Calculate sweep s ep size automatically selected as follows The sweep size is the maximum of 0 1 dB Or Start Amplitude in dBm Stop Amplitude in dBm Sweep Time in ms 8 1 INTEGER OF ms 1 66 SWEEP TIME CALCULATIONS Continued Caiculate sweep time to select desired number of steps as follows First determine the desired number of steps is between the specified limits The maximum number of amplitude steps equals the minimum of Start Amplitude in dBm Stop Amplitude in dBm 0 1 dB The minimum number of amplitude steps equals the minimum of 5 or Start Amplitude in dBm Stop Amplitude in dBm 0 1 dB If the desired number of steps is equal to the maximum use a Sweep time setting in msec equal to or greater than the result of the following equation Number of steps 1 X 3msec If the desired number of steps is less than the maximum use a sweep time setting in msec equal to or greater than the result of the above equation but less than the following equation Number of steps 2 X 3msec Calculate sweep time to select desired step size as follows WW First determine the desired step size is between the specified limits The maximum step size eq
24. IB You can read only the first Parameters Changed message if more than one has occurred For example assume that more than one Parameters Changed message has occurred since either the Status Byte was cleared or since the last time OC was executed Then a Parameters Changed message using OC will enable you to read out only the first message Local These messages are automatically displayed HP IB All of these messages are output via HP IB using OE i Execution Error messages message code is prefixed with E describe the Signal Generator s reason for not executing an attempted setting Some settings are not possible because functions are coupled together due to limitations of internal circuit configuration This coupling will sometimes limit the execution of a setting because one function limits the setting of the other When your setting attempt cannot occur the Signal Generator explains the restriction Execution Error messages occur immediately after executing a command that does not execute HP IB You can read only the first Execution Error message if more than one has occurred For example assume that more than one Execution Exror message has occurred since either the Status Byte was cleared or since the last time OE was executed Then reading an Execution Error message using OE will enable you to read out only the first message 1 27 Hardware Error Messages Information Messages Prompt Messages Out of
25. Some service related messages can also cause this bit to be set Execution Errors OE These messages describe the Signal Generator s reason for not executing an attempted setting Refer to Operating Messages in this Section for more information about these messages Each message code is prefixed with the letter E in that listing The presence of one of these messages is signaled when bit 2 of the Status Byte is set Some service related messages can also cause this bit to be set Parameters Changed Messages OC These messages inform you that the Signal Generator has changed some other setting to allow a new setting Some of the Signal Generator s functions cannot occur simultaneously with other functions so the Signal Generator will automatically adjust or turn off the functions that are preventing the new setting For example AM is turned off when pulse modulation is selected the Output Parameters Changed Message is AM TURNED OFF C11 Refer to Operating Messages in this Section for more information about these messages Each message code is prefixed with the letter C in that listing The presence of this message is signaled when bit 7 of the Status Byte is set Some service related messages can also cause this bit to be set Examples The Signal Generator can output either the message code number or the message string the alphanumeric display for any of the above messages Table 1 8 Error Code and Message Recovery Ex
26. W4P2 Signal Locator t RE EN 3 206 A5J4 Signal Locator Solder Side View Auen 3 209 Cable Plog WAP2 Signal LOCatOr csie dinaanan naaadik ara deaa 3 212 A5J4 Signal Locator Solder Side View EEN 3 214 All Reference Loop Module Diagnostics ee ENEE 3 229 Cable Plug WIFZ Signal LOGator eege ENEE 3 238 A515 Signal Locator Solder Side View E 3 242 Cable Plug WSP2 Signal EE 3 246 ASJ5 Signal Locator Solder Side View EEN 3 248 A12 Sum Loop Divider Module Diagnostics E 3 263 Cable Plug WOP2 Signal Locator smesesremrorerersanseneserssrasavenanssennssnnskukeee 3 279 ASJ6 Signal Locator Solder Side View kee 3 283 Cable Plug W6P2 Signal Locator soesmessesennerenenensranenensassadensepnmenesanre 3 286 A5J6 Signal Locator Solder Side View sees ee REENEN 3 288 A13 Output Filters ALC Module Diagnostics Less Lets 3 293 Cable Plug W7P2 Signal Locator csse VENUE ERN TI PEN 3 312 ASI7 Signal Locator Solder Side View ee 3 345 Cable Plug WJP3 Signal LOCGtOE ees e ERC 3 318 ASIT Signal Locator Solder Side View een 3 321 Cable Plus W7P2 Signal Locator geess sues ree iere p esr Araus Ne E 3 324 A5J7 Signal Locator Solder Side View ENEE 3 326 A14 Heterodyne Module Diagnostics ENEE 3 331 Cable Plug WIIP2 Signal Locator eese rens eege eelef 3 347 A518 Signal Locator Solder Side View renenrnnvnvernnonnnnnnnnnnvsnnvnnnnne 3 349 Cable Plug WIIP2 Sien l LOCATON geegent Eege eg 3 353
27. allowed setting The sweep time setting was less than the minimum allowed for the type of sweep selected Either a Stepped Frequency Sweep was set with the sweep time set less than 275 ms or amplitude sweep was set with the Sweep time set less than 20 ms FREQ SWEEP TURNED OFF C22 2022 RF frequency sweep was turned off Either FREQ START AMPTD or STOP AMPTD was selected HP IB codes FR AA AB when RF frequency sweep was on 1 30 FR SWP AM TURNED OFF C23 2023 RF frequency sweep and AM were turned off Either START AMPTD or STOP AMPTD was selected HP TB codes AA AB when RF frequency sweep was on with AM AMPTD SWP TURNED OFF C31 2031 Amplitude sweep was turned off One of the following functions was selected when amplitude sweep was on START FREQ STOP FREQ AMPTD AM or PULSE SHIFT AM HP IB codes FA FB AP AM PL AA OFF 30DB MAX SPAN C32 2032 Start amplitude setting was turned off because the new stop amplitude setting was set more than 30 dB away from the start amplitude setting This message is queued up until it is read amplitude sweep is turned off or the start amplitude is set again AB OFF 30DB MAX SPAN C33 2033 Stop amplitude setting was turned off because the new start amplitude setting was set more than 30 dB away from the stop amplitude setting This message is queued up until it is read amplitude sweep is turned off or the stop amplitude is set again INCR ADJUSTED C41 2041 AMPTD REF ADJUSTED
28. appears to be in tock SAW loop is out of lock SAW loop had been out of lock but now ap pears to be in lock OUT OF LOCK ERROR FO TRANSIENT FAILURE FI OUT OF LOCK ERROR TRANSIENT FAILURE OUT OF LOCK ERROR TRANSIENT FAILURE A11 OUT OF LOCK ERROR RO TRANSIENT FAILURE A12 OUT OF LOCK ERROR S0 TRANSIENT FAILURE AS OUT OF LOCK ERROR TO TRANSIENT FAILURE A14 OUT OF LOCK ERROR XO TRANSIENT FAILURE A7 OUT OF LOCK ERROR Z0 TRANSIENT FAILURE Out of Lock Solutions 1 Either reduce the amplitude level reduce the AM depth or reduce the external modulation input level 2 Either reduce the FM or M deviation reduce the modulation frequency change the external modulation rate or change the external modulation level 3 Either the external reference is not operating properly or connections are faulty at the rear panel connector EXT REF INPUT The intemal hardware may still be faulty even though the message is gone that is the message would appear again if you connected another external reference to the instrument 1 44 1 8 OPERATING PROCEDURES Operation is broken down into the following functions SETTING INSTRUMENT FUNCTIONS paragraph 1 9 e RF Frequency Amplitude e OFF ON Modulation Modulation Oscillator Output Simultaneous Modulation Source MODIFYING SETTINGS paragr
29. button and enter desired start frequency Press STOP FREQ push button and enter desired stop frequency Press SHIFT then START FREQ push buttons and enter desired sweep time PHASE CONTINUOUS FREQUENCY SWEEP Continued 6 Select desired sweep mode For AUTO sweep press SHIFT then START AMPTD push button Verify data entry is correct and START FREQ SPCL SWPNG and STOP Annunciators are on For Manual sweep press SHIFT then STOP FREQ push button Turn Tune KNOB for sweep e For Single sweep press SHIFT then STOP AMPTD push button 7 To deactivate sweep mode Press START FREQ OFF ON STOP FREQ and then OFF ON push buttons Press SHIFT then push buttons and enter 2 2 3 Press SHIFT then SHIFT push buttons AMPLITUDE SWEEP NOTE Calculations for step size number of steps to sweep time are provided under SWEEP TIME CALCULATIONS below On Signal Generator press SHIFT then INSTR PRESET push buttons Press START AMPTD push button and enter desired start amplitude Press STOP AMPTD push button and enter desired stop amplitude Press SHIFT then START FREQ push buttons and enter desired sweep time Select desired sweep mode Ek de qu em For AUTO sweep press SHIFT then START AMPTD push button Verify data entry is correct and FREQ SWPNG START AMPTD and STOP Annunciators are on For Manual sweep press SHIFT then STOP FREQ push button Turn Tune KNOB for Sweep e For Single sweep press SHIFT then STO
30. destruction Only those who are thoroughly familiar with industry accepted techniques for handling static sensitive devices should attempt to service circuitry with these devices In all instances measures must be taken to prevent static charge build up on work surfaces and persons handling the devices For further information on ESD precautions refer to SPECIAL HANDLING CONSIDERATIONS FOR STATIC SENSITIVE DEVICES in Section VIII Service Section CERTIFICATION Hewlett Packard Company certifies that this product met its pub lished specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measure ments are traceable to the United States National Bureau of Stan dards 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 de fects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company 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 charges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay a
31. display present start value in the display Press and use data entry push buttons to enter new start amplitude Start amplitude may be less than or greater than stop amplitude Used to start frequency amplitude sweep restarting at end of each sweep Beginning frequency amplitude is controlled by START push button ending frequency amplitude is controlled by STOP push button and sweep time is controlled by TIME push button Press SHIFT then START AMPTD push button to activate Used to enter or display a stopping amplitude in sweep mode Press to display present stop value in the display Press and use data entry push buttons to enter a new stop amplitude Stop amplitude may be less than or greater than start amplitude KEY 10A 11 11A 12A 13 CONTROL INDICATOR OR CONNECTOR SINGLE EXT DC push button INT EXT DC EXT AC push button INT EXT AC INT push button RQS MASK FUNCTION Used to start frequency amplitude sweep stopping at end of each sweep After one complete sweep all values remain at stopping point value Beginning frequency amplitude is controlled by START push button Ending frequency amplitude is controlled by STOP push button Sweep time is controlled by TIME push button Press SHIFT then STOP AMPTD push button to activate Selects an external dc coupled signal to modulate the Signal Generator RF Output External signal is connected to AM PULSE FM OM connector
32. fluctuations Therefore relatively small dc voltage changes can cause the Signal Generator to lose phase lock requiring one to two seconds to regain the locked condition Special functions 112 or 5 is turned off when another FM modulation source is selected Modulation Frequency Correction Off This special function disables the single band calibration of the modulation frequency oscillator that normally occurs whenever the modulation oscillator frequency is set or the internal modulation oscillator is put into use When this calibration is disabled the typical modulation frequency switching time is decreased by approximately 200 ms Negative M Polarity This special function causes a positive voltage applied to the external FM M INPUT to cause a phase lag and a negative voltage applied to cause a phase lead Negative FM Polarity This special function causes a positive voltage applied to the external FM M INPUT to cause a negative frequency shift and a negative voltage applied to cause a positive frequency shift DC FM Correction Off This special function prevents the initial frequency correction that occurs when dc coupled FM is selected Normally when dc coupled FM is selected the FM phase lock loop is open causing an offset in the selected RF output frequency To correct this initial offset the dc coupled signal is momentarily switched off while an internal counter is used to determine the amount of RF frequency offset The f
33. has been found This message could be due to a hardware failure for example loss of RAM memory The message means that a recall register that was recalled had no instrument settings saved in it The register could have been cleared with Special Function 251 Clear Recall Registers or because of a hardware error This error H10 occurs in conjunction with execution error E93 MSSG BUFFER OVERFLOWED H11 7011 The message buffer has overflowed Some messages were lost INSTRUMENT PRESET Al Instrument Preset is being executed This message cannot be read via HP IB using Output Display because it automatically clears from the display after execution completes PARTIAL PRESET 42 Partial Preset is being executed This message cannot be read via HP IB using Output Display because it automatically clears from the display after execution completes YYMMDD FIRMWARE CODE 13 This message Is an example of the Signal Generator s display of the current firmware version which is accessed with Special Function 249 In this example YYMMDD represents the numbers that will appear in the display where YY is the last two digits of the year MM is the number of the month and DD is the day of the month For example 570218 would be February 18 1957 KNOB INCR TURNED OFF KA Knob increment mode was turned off Cursor positioning push buttons HP IB KL or KR turn off the Knob Increment mode SETTINGS DISPLAY OFF 121 Special Function 135 Disable Displa
34. of 19 characters Following is a programming example in BASIC for outputting the active function OA Output the RF frequency setting as either a numeric value or a string from the Signal Generator address 19 OA should be preceded by the function s HP IB code To output the numeric value 10 OUTPUT 719 FROA 20 ENTER 719 V Value is output in Hz To output the alphanumeric character string 10 OUTPUT 719 FROA 20 ENTER 719 AS 1 77 Output Messages Continued The functions and values that can be output over HP IB using OA are listed below along with some format parameters Meanings of Values That Could Be Output 200 indicates the function is off 201 indicates RF OFF for amplitude only 202 indicates reverse power is tripped for amplitude only space character is placed before and after the numeric portion of the string Output String Formats Table 1 6 Output Active Function String Formats on the following page lists the output format for each active function string The meanings of symbols in Table 1 6 are as follows S sign character either or d digit Leading zero digits greater than the one s digit are suppressed If a function s value is in relative units the displayed relative setting not the absolute setting will be output You can output absolute units by converting from relative units to absolute units before outputting the active function OA can be sen
35. one year Warranty starts on the date of shipment to the original buyer 0 6 EQUIPMENT THAT CAN BE ORDERED FOR THE SIGNAL GENERATOR Bench Service Kit This kit in conjunction with the HP 8642 Synthesized Signal Generator Service Manual is directed at component level repair and module calibration of the HP 8642 The kit contains special tools and troubleshooting aids such as a Torx torque driver and Torx bits special cables and cable adapters test adapters etc Order the Bench Service Kit with HP part number 11802A Fiberglass Transit Case This is a protective case for shipping and transporting the HP 8642 Signal Generator Order the case with HP part number 9211 2661 0 7 MODULE EXCHANGE PROGRAM All modules contained in the Signal Generator may be replaced In addition most replacement modules are available as restored factory repaired and calibrated parts on an exchange basis thus providing a considerable cost savings Refer to the REPLACEABLE PARTS section for ordering information The modules should be packaged in the cartons supplied for shipment 0 8 STORAGE The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment Temperature suininaishudn SEE ER 55 C to 75 C Humidity paean 5 to 95 maximum wet bulb temperature 40 C P Wei t MPH po Hc 50 000 feet 15 300 meters Org 0 9 PACKAGING Original Packaging Containers and
36. paragraph 1 7 for explanation Verify the following condition exists on the Signal Generator front panel KENO cM OPE 100M Hz Start PTCQUCNCY 02 2c T OFF 100MHz eier sundene OFF 100 1MHz Fiequency Referenbe LA OFF 100MHz Fe REE EE EE ON 140dBm eirud win EE OFF 140dBm SUP APIE se OFF 135dBm Pimple REENEN OFF 1 01V EME MODUS NT OFF AM Dep SEG OFF 50 Internal EEN OFF SOKHz Internal Phase Deviation sa need OFF 1 0 radians Internal Pulse Modulaton Ae OFF Extemal DC Source MOduldtion ETeqUellCy EE 1 0 amp 8 Hz Motduanon Output Level 3 encre Eege OFF 1V PIEQUENCY SWEEP MAS Lem AUTO Amplitude ER AUTO EE AR 500msec AJ other controls and indicators 1 25 SIGNAL GROUND SHIELD CONNECT TO P O TWISTED PAIR WITH 11 ATN EARTH P O TWISTED PAIR WITH 10 SAO GROUND SHOULD BE GROUNDED P O TWISTED PAIR WITH 9 IFT NEAR TERMINATION P O TWISTED PAIR WITH 8 NDAC OF OTHER WIRE OF P O TWISTED PAIR WITH 7 NRED TWISTED PAIR P O TWISTED PAIR WITH 6 DAV REN EO DO 8 DIO 4 DIO 7 Dio 3 DIO 6 DIO 2 Dio 5 DIO 1 ISOMETRIC THREAD M3 5 x OG 24 PIN MICRO RIBBON SERIES 57 CONNECTOR Logic Levels The Hewlett Packard Interface Bus logic levels are TTL compatible i e the true 1 state 15 0 0 Vdc to 0 4 Vde and the false 0 state is 2 5 Vdc to 5 Vdc Programming and Output Data Format Refer to Section ill Operation Mating Connector HP 1251 0293 Amphenol 57 30240 Mating Cables Available HP 10631A 1 metre 3 3 f
37. push button Used to enter an output amplitude level Push and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter a new amplitude New value may be entered in dBm V mV pV or dBuV RAD push button Amplitude is shown with a cursor above display indicating it is the active function Used to store the current RF output frequency amplitude setting as the new frequency amplitude reference After pressing display will show OMHz 0dB All subsequent frequency amplitude settings will be entered and displayed as MHz dB relative to the stored frequency amplitude reference value KEY 17 17A 18 CONTROL INDICATOR OR CONNECTOR FM push button PHASE M INCR SET push button FUNCTION Used to activate frequency modulation mode When using internal source push FM then INT to activate internal modulation oscillator Push FM and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter a FM deviation in GHz MHz KHz or Hz When external signal source is used for FM mode press FM and enter FM deviation in GHz MHz KHz or Hz for a1 volt peak signal applied to FM connector Actual FM deviation is controlled by amplitude of input signal and FM deviation selection FM deviation is shown with a cursor above display indicating it is the active function May be used simultaneously with either AM or Pulse Modulation
38. sequence dependency in paragraph 1 15 SP9 PREVENTS PULSE E78 4078 Pulse modulation is not possible when Special Function 9 Attenuator Range Hold is selected Select Attenuator Range Hold Off Special Function 209 before selecting pulse modulation PULSE PREVENTS SP9 E79 4079 Special Function 9 Attenuator Range Hold is not possible when pulse modulation is selected Turn off pulse modulation HP IB PLOF and set output amplitude HP IB AP to the desired level before selecting attenuator range hold HP IB SP9 SP9 PREVENTS SP4 E80 4080 Special Function 4 ALC Off is not possible when Special Function 9 Attenuator Range Hold is selected Select Attenuator Range Hold Off Special Function 209 before selecting ALC off HP IB Send SP209 before SP4 SP4 PREVENTS SP9 E81 4081 Special Function 9 Attenuator Range Hold is not possible when Special Function 4 ALC Off is selected Disable ALC Off Special Function 204 before selecting attenuator range hold HP IB Send SP204 before SP9 AM PREVENTS SP4 E82 4082 Special Function 4 ALC Off is not possible whea AM is selected Turn off AM before selecting ALC off HP IB Send AMOF before SP4 PULSE PREVENTS SP4 E83 4083 Special Function 4 ALC Off is not possible when pulse modulation is selected Turn off pulse modulation before selecting ALC off HP IB Send PLOF before SP4 SP4 PREVENTS AM ESA 4084 AM is not possible when Special Function 4 ALC Off is selected S
39. summarized in Signal Generator Function to HP IB Code in Table 1 10 and Signal Generator HP IB Code to Function in Table 1 11 In addition most HP IB codes are printed on the instrument s front panel in light gray print near the code s associated push button Input Syntax Input data information consists of one or more bytes sent over the bus eight data lines when the bus attention control line ATN is false and when the Signal Generator is remote and addressed to listen with the REN line true low The Signal Generator processes ASCI characters individually as they are received and performs the function specified as soon as a recognizable sequence of characters has been received Accessing the Signal Generator s front panel key functions via HP IB is equivalent to accessing them from the front panel Table 1 5 compares some local keystroke sequences and their corresponding HP IB code sequences Direct access to the shift functions is possible from HP IB so the Shift push button is not used in HP IB coding Table 1 5 Relationship Between Keystrokes and HP IB Code Sequences Froni Panel Keystroke Sequence G Sequence To set a 1 MHz ETNE FR 1 MZ To set an RF FRRS 1 MZ frequency reference Le SEN s 0 1 C1 C8 of 1 MHz To select Special S pes SP 111 Ke sec EM MM Le DATA INPUT Continued Sequence Dependency Some functions in the 8642 are coupled together because of internal circuit configuration limitati
40. then STEP DOWN push buttons to deactivate Help mode 1 54 SPECIAL FUNCTIONS 1 Press SHIFT then push buttons and enter the number of the desired special function activate or deactivate 2 Press SHIFT then push buttons to view the current special function modes active NOTE Use Help function Table 1 3 or see listing for information on special functions available DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS NO DESCRIPTION 0 Special Functions 4 through 9 Off This special function turns off Special Functions 4 through 9 Sometimes all these special functions will not be turned off if the instrument state is dependent on a special function A message will be displayed to notify you if a special function remained on after you selected Special Function 0 Special functions can also be turned off individually 3 Service Mode This special function causes the Signal Generator to enter its service mode Refer to para 1 16 for information about writing messages to the display or refer to Section III for information about servicing the instrament Select any function to exit this mode if this push button was accidentally selected 4 ALC Off This special function opens the output leveling loop to provide typically a 5dB improvement in third order intermodulation at a 2kHz offset Typical output level accuracy is 2dB when ALC Off is selected External Low Rate FM ON See number 112 Un 6 FM Pre emphasis On Sp
41. 0 DESCRIPTION Re enable Display This special function re enables the display of settings disabled with Special Function 135 Decrement Frequency by 0 1Hz Increment Frequency by 0 1Hz These special functions change the RF signal s output frequency in 0 1 Hz steps each time the special function is selected Changing frequency in these ways cause a message to be queued up in the message list that provides the total increment or decrement Phase Decrement I Degree Phase Increment 1 Degree Phase Decrement 5 Degrees Phase Increment 5 Degrees These functions change the RF signal s output phase by the indicated amount each time the special function is selected Calibrate the Modulation Frequency Bands Again This special function enables you to initiate the calibration sequence that normally only occurs during instrument power up This function can be used for example to recalibrate the modulation oscillator frequency bands if normal modulation frequency correction has been disabled with Special Function 113 Calibration typically takes one to two seconds Display Firmware Information This special function displays the current firmware version with a message such as YYMMDD FIRMWARE CODE 13 In this example YYMMDD represents the numbers that will appear in the display where YY is the last two digits of the year MM is the number of the month and DD is the day of the month For example 841225 would be December 25 1984 Ph
42. 00MHz Pulse Modulation Input Connector Female Type BNC coaxial connector Me Ge EH 500 50 10Hz to 200K Hz Pulse Repetition Rate Range 22 esee Tu Reese FER ONE E TN PX ERREUR M ERR ERE DC to SOKHz Duty Cycle Maximum Sen 250 Pulse Duration Range Gusec to SOmsec measured from DC volts to turn on pulse to DC volts turn off pulse Pulse First and Last Transition Duration 10 to 90 rise fall time 31sec to 20msec POSE tico d ec UR 3V to 10V Pulse Baseline Maximum Amplitude Less negative than 0 5V and less positive than 0 5V Pulse Topline Minimum Amplitude More negative than 3 5V and more positive than 3 5V Maximum Input EE EEE ER 20 volts 30 seconds RF Pulse Envelope Duration esessasoneesersverensneveneser i595 of the input pulse duration 0 11 TECHNICAL CHARACTERISTICS Continued MODULATION SPECIFICATIONS Continued Pulse Modulation Continued RF Pulse Envelope First Last Transition Duration 10 90 rise fall time lt O Sjisec RF Pulse Envelope Overshoot Undershoot lt 20 of the RF pulse envelope amplitude RF Pulse Envelope first and Last Settling Duration lt lpsec to within 1 of final value measured from two 90 points RF Pulse Envelope On Off Ratio EEN gt 40dB 10MHz to 2000MHz Phase Modulation Maximum Deviation 100 radians from 100KHz to 132 1875M Hz 25 radians from 132 1875MHz to
43. 08662 60075 HP 08662 60080 HP 1250 0827 HP 1250 0832 HP 1250 0837 HP 1250 1697 HP 1251 5653 HP 1251 8105 HP 1251 8248 HP 1250 8601 HP 1251 8812 HP 1251 8823 HP 1252 0153 HP 5021 0844 HP 34118A 0 11 TECHNICAL CHARACTERISTICS CONTINUOUS WAVE CW SPECIFICATIONS Frequency Range with specified RF performance 100KHz to 2000MHz Frequency Range without specified RF performance 10KHz to 2000MHz Re ND MN LU Dd MU LU CLIE 1Hz Display Accuracy 2 ppm 15 C to 35 C and 10 ppm 0 C to 50 C Frequency Stability Stability vs Time e 0 05 ppm hour and 2 ppm 90 days Stability vs Temperature 2 ppm 15 C to 35 C and 10 ppm 0 C to 50 C Stability vs Line Voltage 50 05 ppm for a 10 change in ONE source voltage Stability Ee E E 0 01 ppm Spectral Purity Harmonics 25dBc from lt 13dBm lt 1057 5MHz and lt 7dBm gt 1057 5MHz Sub Harmonics EEN 100dBc to 1057 5MHz and ASdBc to 2GHz Spurious Signals 70dBc to 132 1875MHz 90dBc 132 1875MHz to 1057 5MHz and 84dBc above 1057 5MHz offset gt 10K Hz from carrier Residual AM s rernenneressvnranenn lt 0 01 AMrms 0 3 to 3 KHz post detection bandwidth Residual FM lt 4Hz to 132 1875MHz 2Hz 132 1875MHz to 1057 5MHz and 5Hz above 1057 5MHz in a 0 3 to 3KHz post detection noise b
44. 2 1 3 14 1 5 1 6 3 100 3A 100 3B 1 3B 2 3B 3 3B 4 3B 6 3B 5 3B 100 3B 200 3C 1 3C 2 3C 3 3C 100 3E 1 3E 2 3E 100 3F 1 3F 2 3F 3 3F 3 3F 4 TABLE OF CONTENTS Continued FIGURES Operator s Controls Indicators and Connectors Front View Operator s Controls Indicators and Connectors Rear View Line Voltage and Fuse Selection See SEENEN ENEE Een Hewlett Packard Interface Bus Connections EEN Flowcharts for Sequence Dependency eee eee The Status Byte and ROS Mask EEN Al A3 A4 Module Simplified Block Diagram A2 Module Simplified Block Diagram ENNEN A6 Module Simplified Block Diagram eee A7 Module Simplified Block Diagram eene AS Module Simplified Block Diagram EEN A11 Module Simplified Block Diagram see A12 Module Simplified Block Diagram ENEE A13 Module Simplified Block Diagram REESEN EE A14 Module Simplified Block Diagram ee sos A17 Module Simplified Block Diagram eene A18 Module Simplified Block Diagram ENEE A19 Module Simplified Block Diagram een RF Section Signal Flow Diagram ee Instrument Level Diagnostics ENEE Connector A17J1 Signal Locator cueste Cable W13 Connector Locator cseeerrenvavesnavarrnrnnrernnvnnvnenenrneuneenenne Connector A18J1 Signal Locator ee Cable Plug W9P2 Signal Locator EEN EET Cable Plug W9P2 Signal Loca
45. 219 External Low Rate FM Internal External Low Rate FM FM Pre Emphasis Low Distortion FM M Negative FM Polarity DC FM Correction Off DC FM Update Mode AC Coupled DC FM Prefer Heterodyne Band Disabie Settling Low Distortion FM amp M Negative SM Polarity 7 207 114 214 Disable Settling 119 219 Modulation Modulation Frequency Correction Off 113 213 Oscillator Calibrate Modulation Frequency Bands Again 248 Sweep Sweep Up and Down 121 221 Linear Amplitude Sweep 122 222 Phase Continuous Frequency Sweep 123 223 Disable Settling 119 219 Miscellaneous Special Functions 4 9 Off All Special Functions lt 200 Off Special Function Verification Off Display Firmware Information Disable Display Turn Off LCD Lighting Clear Recall Registers 1 56 DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS Continued NO DESCRIPTION 111 112 113 114 116 Disable the Automatic Special Function Verification Display This special function disables the automatic display of the special function description that normally occurs after each special function is selected Internal External Low Rate FM On This special function and number 5 typically provide 0 4 Hz to 200 kHz external ac coupled FM with the Signal Generator remaining in a phase locked state Input coupling required for these functions makes the Signal Generator especially sensitive to dc voltage
46. 6 The Status Byte and RQS Mask If the RQS bit is not set the Status Byte will reflect the current status of the instrument If the ROS bit is set the Status Byte will reflect the status of the instrument when the RQS bit was first set or when the Status Byte was last read with RQS set To actually get the current status of the instrument the Status Byte should be read again Note that the act of reading the Status Byte alone does not clear any status bits Clearing the Status Byte If the instrument does not have an unresolved hardware error the Status Byte will be cleared by executing any of the following Sending Clear Status CS Sending Instrument Preset IP Sending Device Clear or Selected Device Clear Switching the Power from Standby to On You can also clear the Status Byte by clearing the individual status bits Refer to Table 1 9 NOTE Bits 3 Local Remote and 4 Ready are not affected by clearing the Status Byte They always output their actual values 1 85 Table 1 9 HP IB Status Byte Bit Definitions HP IB Operating Condition END OF SWEEP Single sweep finished Reset with auto manual or a new single sweep or sweep mode off 2 HARDWARE ERROR Instrurnent out of lock reverse power tripped or instrument firmware malfunction Reset with an Output Hardware Error message to the 8642A B HP IB program code OH More than one Hardware Error message may be pr
47. A Z a z lower case letters are converted to upper case 0 9 Leading zeros are treated as significant digits The space character carriage return and line feed are ignored DATA OUTPUT The Signal Generator can send the following data messages when it is addressed to talk Status Byte refer to Status Byte in this paragraph Messages discussed below Display Information discussed below Service Messages refer to Section III specific Service Message information The Signal Generator can output the following messages and display information normally viewed on the front panel display using HP IB codes that do not have equivalent front panel keys The HP IB codes are in parenthesis after each message listed below Output Messages Hardware Errors OH Execution Errors OE Parameters Changed Messages OC Output Active Function OA Output HI LO Status OL Output Display Output Display is the default HP IB output when nothing else is configured for data output it does not require an HP IB code to output data Output Messages Hardware Errors OH These messages signal the presence of either an internal circuit Nea hardware problem or a firmware problem Refer to Operator Messages in this section for more information about these messages Each message code is prefixed with the letter H in the listing in that section The presence of one or more of these messages is signaled when bit 1 of the Status Byte is set
48. AMPTD REL E33 4033 No relative units are possible with the requested setting Select only FREQ or AMPTD HP IB FR or AP before attempting relative settings AP REF DISALLOWS DBuV E34 4034 An amplitude reference cannot be set in dBuV Set amplitude to the desired value in dBuV then select REL ZERO HP IB APRZ AP SWP DISALLOWS DBuV E35 4035 An amplitude sweep cannot be directly set in dBuV Convert the desired dBuV setting value to absolute units then set the amplitude sweep in absolute units FM COUPLED FUNC LIMIT E38 4038 FM is coupled with an attempted setting You are either attempting a setting that is impossible or attempting to set functions in an incorrect order This message could also have been caused by executing Special Function 0 or 100 when one special function was coupled to other instrument settings INT EXT FM PREVENT Spe E39 4039 Special Function 6 FM Pre Emphasis cannot be selected when an internal source is summed with an external source Select a single FM source INT EXT AC EXT DC or Special Function 5 HP IB FMNT FMXA FMXD or SP5 before selecting FM Pre Emphasis or refer to sequence dependency in paragraph 1 15 PM LIMITS MIN FREQ E40 4040 The M setting limits the minimum RF frequency value that can be selected Either reduce M deviation or select an RF frequency that allows the M deviation or refer to sequence dependency in paragraph 1 15 PM LIMITS MAX FREQ E41 4041 The M setting l
49. An unlisted serial prefix number indicates that the instrument differs in some way from those being documented when this manual was released A MANUAL UPDATES packet is shipped with the manual when necessary to provide you with the most current information available at the time of shipment These packets consist of replacement and addition pages which should be incorporated into the manual to bring it up to date Hewlett Packard offers a Documentation Update Service that will provide you with further updates as they become available If you service instruments of different serial prefixes we strongly recommend that you join this service immediately to ensure that your manual is kept current For more information refer to the Documentation Update Service reply card included with this manual or contact Hewlett Packard Company Technical Writing Department 24001 E Mission TAF C 34 Spokane WA 99220 509 922 4001 0 4 DESCRIPTION The Hewlett Packard 8642M Signal Generator has a frequency range of from 100KHz to 2GHz and frequency resolution of 1Hz at all frequencies The output is leveled and calibrated from 15dBm to 140dBm at all frequencies Amplitude Modulation Frequency Modulation and Pulse Modulation modes are selectable Frequency modulation modes output level and most other functions can be remotely programmed via the interface 0 1 0 5 WARRANTY INFORMATION The HP 8642 is warranted by Hewlett Packard Company for
50. Diagnostics saasesoseoeoranae PER ee 3 22 A17 Module DiaPhOSBCS varsko 3 38 Control Section Diagnostics sees eees ENES 3 53 3C 1 e sesongene 3 53 A4 Module Substitution sabler cl wsb eui eiu 3 54 3C 2 Prod La 3 54 A3 Module Substitution ao 3 55 3C 3 InttOdu COH ge ecd Hoe ud Vai SR OM debe ama eR ide 3 55 Al Module Substitution Lae 3 56 3C 4 Introduction ee 3 56 Control Section Diagnostics sr esee eite neo Deed Eu ean pee ue dai at 3 57 RF Section Diagnostics 12e dose ra nna eara opa es ee 3 73 A2 Modulation teuer eege rene xoa sane IRE PP rA Ria ee 3 75 3E 1 Tro Se 3 75 A2 Module Substitution sd 3 76 3E 2 InttoduE Oft ee 3 76 Sy At A2 Inputs O tputs Verification E 3 77 3E 3 Introduction een 3 77 A2 Module Diagnostics Lione exe et raura dax o e e EVER sn nds cieaie 3 78 A6 FM Loop Counter Timebase Module un 3 105 3F 1 InteodUcHOn see 3 105 A6 Module Substitution eese eene Loue Ee 3 106 3F 2 Ing OdUCHON ae 3 106 A6 Inputs Verification E I 10 3F 3 Jett ee 3 107 A6 Module Diagnostics een dina 3 108 AT SAWR Loop Module eene NER 3 141 3G 1 hrs ss E 3 141 A7 Module Substitution EN mq 3 142 3G 2 IHGOGUCHOB use 3 142 AT Inputs Verification eege Eeer Neies 3 143 36 3 Introduce HO succes ice ee Ee 3 143 e 3 144 AV TF Loop Module saaledes Get 3 169 JHEL r e 3 169 A9 Module SuDSUDIBOI Sende 3 170 3H 2 LoT ore d e r BINE
51. Display Editing Making Relative Settings Amplitude Relative Frequency Relative Selecting Special Functions Help Function E Special Functions ee TE SETET TET KS EE TET EEE EE 4 Aa404A9 49254 y 9A TE EF TP T 9 A2 4APP es E EE SSO R NH hhasuoanoateieott ttenenestbvtuwkastbuumeth ELLE ZELLE TTT WO EMER ERE EHR EEE ROTH THOT OR ES FEET HE EM ER WH BE HELA tende Neve pe EE STEUER AH PRORA hn PRE Re ER PRA HON ee RENE Oe Em DS ee ee eee eee ee Perm Mer SCOPES RESET EE ER EHR EEE eee C NAA PARS HEHE HEHEHE HO nn Oe RESP EO TAHA EER EEE ER FETE HATER TRE EES Ree ROAR HAASE RETRO EH T BPtR t en DET EEE he TH eee PORE METER ERE HE Tennene vene REHM HED amp PAR E HORSE RR OR EEE SEER EH sene PN RAMEE Tam Pty Detailed Descriptions of all Special Functions Selecting a Sweep Stepped Frequency Sweep PERES EE EET ES ras Kb ee ee ETTE eee Pee ETTE EEE ETAT seen Phase Continuous Frequency Sweep eee Amplitude Sweep Sweep Time Calculations Recalling Instrument Settings DIVE Vee Recall ene Hr Sequence Set Sequence HP IB Remote Operation HPAB Address 1o HP IB Capabilities Data Input Lone Data OUtDUU sanse Output Messages 912 1 fe Up Addinonal HP IB Information ETTE
52. EMF amplitude is required proceed as follows Press SHIFT INCR SET then OFF ON push buttons to activate the EMF mode NOTE Any previous amplitude setting will be automatically changed to reflect its equivalent EMF voltage setting Enter the desired level from 140 to 15dBm using the numeric push buttons Select V mV nV or dBuV Verify entered EMF amplitude is displayed along with cursor and EMF annunciator To Exit EMF mode press SHIFT INCR SET then OFF ON push buttons To tum off RF output amplitude and harmonics without adjusting the output attenuators press RF OFF ON push button To turn on the amplitude to its previously selected value press RF OFF ON push button 1 46 OFF ON 1 If function is on press function push button AM FM etc then OFF ON push button to deactivate function without changing last stored value 2 If function is off press function push button AM FM etc then OFF ON push button to activate function using last stored value MODULATION 1 Set AM as follows Press SHIFT then INSTR PRESET push button If internal modulation oscillator is used Press AM then INT push button Press MOD FREQ push button and enter desired modulation frequency from 20Hz to 100KHz Press AM push button and enter desired depth from 0 to 99 9 Verify entered data is displayed along with cursor AM and INT annunciator If external modulation signal is used Connect 1 Vpeak 5 sinewave external inpu
53. ENE Digital Voltmeter 10mV to 600V 05 of reading 1 digit HP 3466A 3455A Oscilloscope 10mV div 100MHz BW HP 1740A Power Meter 10MHz to 2GHz 27 to 7dBm t1 HP 432A Thermistor Mount 10MHz to 2GHz 27 to 7dBm 1 HP 478A Attenuator 450KHz to 2GHz 10dB 0 1dB 1 3 SWR HP 8491B 010 Spectrum Analyzer 900KHz to 1GHz SOKHz 250MH2 Span DIV HP 8562A Pulse Generator 50K Hz max rate 6utsec PW lt 100nsec rise time HP 214B Modulation Analyzer No substitute HP 8901A Distortion Analyzer 0 595 AM 0 2 FM distortion 0 4vpeak input HP 334A Frequency Counter 0 2GHz 1Hz HP 5345A Low Frequency 100Hz to 40MHz 10Hz RES BW 90dB HP 3585A Spectrum Analyzer dynamic range 0 3 0 10 RECOMMENDED TOOLS AND TEST EQUIPMENT Continued INSTRUMENT Adapter Adapter Cable Assembly BNC Tee Test Conn Cable Assembly Cable Assembly Cable Assembly Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Adapter Test Lead Kit 0 4 CRITICAL SPECIFICATION BNC to type N BNC to dual banana 500 BNC BNC 2 each BD ASSY PS TEST CONN Flat Long Short M SMC to M SMC 4 F BNC to F SMC 2 M SMC TEE M SMA to F SMC 2 50 Pin Test Connector 16 Pin Test Connector 26 Pin Test Connector 34 Pin Test Connector 20 Pin Test Connector 14 Pin Test Connector 10 Pin Test Connector Binding Post MODEL NUMBER HP 08642 80053 HP 08642 60959 HP
54. FM LOOP LOCK 140 Wait for the Signal Generator s internal FM circuitry to complete its setting This message cannot be read via HP IB using Output Display because it automatically clears from the display after execution completes This message is displayed when switching from a dc coupled FM source to a non dc coupled FM source No additional external settling time allowance is necessary to settle within 100 Hz of the selected frequency RF FREQ DISPLAY 0 9 HZ 149 RF FREQ DISPLAY 0 8 HZ 148 RF FREQ DISPLAY 0 7 HZ 147 RF FREQ DISPLAY 0 6 HZ 146 RF FREQ DISPLAY 0 5 HZ 145 RF FREQ DISPLAY 0 4 HZ 144 RF FREQ DISPLAY 0 3 HZ 143 RF FREQ DISPLAY 0 2 HZ 142 RF FREQ DISPLAY 0 1 HZ 141 RF FREQ DISPLAY 0 1 HZ 151 RF FREQ DISPLAY 0 2 HZ 152 RF FREQ DISPLAY 0 3 HZ 153 RF FREQ DISPLAY 0 4 HZ 154 RF FREQ DISPLAY 0 5 HZ 155 RF FREQ DISPLAY 0 6 HZ 156 RF FREQ DISPLAY 40 7 HZ 157 RF FREQ DISPLAY 0 8 HZ 158 RF FREQ DISPLAY 0 9 HZ 159 The current RF output frequency is now summed with one of these 0 1 Hz steps listed in messages 141 through 149 and IS1 through 159 that were accessed with either Special Function 240 Decrement Frequency by 0 1 Hz or Special Function 241 Increment Frequency by 0 1 Hz The RF frequency addition is automatically deleted with any specific frequency setting or change These messages are queued up and can be displayed using MSSG HP IB Execute MG and read the display Perform this entire process
55. IE WaveteoeSae E ones 3 170 A9 EEN 3 171 3H 3 rekord 3 171 A9 Module Diagnostics 1o petet p Dare pae eese od oan te 3 172 SECTION III 31 1 312 31 3 3J 1 3J 2 3J 3 3K 1 3K 2 3K 3 3L 1 3L 2 3L 3 3L 4 30 1 30 2 30 3 30 4 TABLE OF CONTENTS Continued Page DIAGNOSTICS Continued All Reference Loop Module eese 3 199 hodt LRS 3 199 A11 Inputs Verification EEN 3 200 Introduchoft oe 3 200 A11 Module Substitution eesrvoonevovnnnnannereverevnsnnnosersavnvanneneee 3 201 eegent 3 201 A11 Module Diagnostics erererrennorvnennnerennvnnnrnavvavnnnesennsnnranere 3 202 A12 Sum Loop Divider Module eene 3 231 TOC CHOI vasre 3 231 A12 Inputs Verification essences ee eren SEE 3 232 Introduction seesinane caaaeaee EE 3 232 A12 Module Substitution ssaassessenisse trener E 3 233 Introduction EE 3 233 A12 Module Diagnostics eeeroennenvaneenrnnnnnnevnrernnrneraresennnenveneee 3 234 A13 Output Filters ALC Module EEE dos 3 265 Trodde Ga 3 265 A13 Module Substitution ee ES RA 3 266 Fo Le 3 266 A13 Module Inputs Verification enerorooesoneavnos0vnnavarananvnnnveer 3 267 Innoduetiotio image 3 267 A13 Module Diagnostics EEN ENN AEE 3 268 A14 Heterodyne Module neonrnnnenenonrnnnnvenrunevnsrrneevnnnennnanenennueer 3 295 Introduction REE eases ad sedis KA 3 295 A14 Module Substitution E 3 296 Intr duction E 3 296 A14 Input
56. IMITS MIN TIME E64 4064 The minimum sweep time possible for amplitude sweep is 20 ms Either select another sweep time or turn off amplitude sweep HP IB AAOF ABOF AP SWP PREVENTS SP9 E65 4065 Special Function 9 Attenuator Range Hold is not possible during amplitude sweep Turn off amplitude sweep HP IB AAOF ABOF and set amplitude HP IB AP before selecting attenuator range hold HP IB SP9 QV L A uNe 1 37 SP9 PREVENTS AP SWP E66 4066 Amplitude sweep is not possible when Special Function 9 Attenuator Range Hold is selected Select Attenuator Range Hold Off Special Function 209 before selecting amplitude sweep AM PREVENTS AP SWP E68 4068 Amplitude sweep is not possible when AM is selected Turn off AM HP IB AMOF before selecting amplitude sweep AP SWP PREVENTS AMPTD E69 4069 Output amplitude cannot be set during amplitude sweep Turn off amplitude sweep HP IB AAOF ABOF before selecting the output amplitude AMPTD SWP PREVENTS AM E70 4070 AM is not possible during an amplitude sweep Tum off amplitude sweep HP IB AAOF ABOF before selecting AM AP SWP PREVENTS AP OFF E71 4071 Output amplitude cannot be turned off during amplitude sweep Turn off the amplitude sweep HP IB AAOF ABOF before turning off the output amplitude AP SWP PREVENTS PULSE E72 4072 Pulse modulation is not possible during an amplitude sweep Turn off the amplitude sweep HP IB AAOF ABOF before selecting pulse modulation
57. Lock Messages Local These messages are all queued up and can be displayed using the MSSG push button HP IB All of these messages are output via HP IB using OH Hardware Error messages message number is prefixed with H signal the presence of either an internal circuit hardware problem or a firmware problem that you might be able to resolve Hardware Error messages may occur independently of function execution A maximum of 20 Hardware Error messages can be queued up to be accessed either by the MSSG push button on the front panel or via HP IB using OH If you are unable to repair the hardware error refer to Section III for more information Local These messages are automatically displayed when you execute a function HP IB Most of these messages can be output via HP IB using the Output Display capability after you execute a function 11 12 159 and 160 cannot be read via HP IB To understand a way to read 141 through 149 and 151 through 159 refer to that message description on the following page Information messages message code is prefixed with I provide useful information about instrument settings or conditions Local These messages are automatically displayed when you execute a function HP IB Most of these messages can be output via HP IB using the Output Display capability after you execute a function P91 cannot be read via HP IB Prompt messages message code is prefixed with P instruct you to
58. Module A2 E 5 11 5 10 Control Module E 5 12 5 11 LCD Display Assembly A1A2 eene 5 14 5 12 LCD Display Incandescent Lamps ENEE 5 15 5 13 Right Sid Cover runrerennrovernenvsvrnnnnernrrnrerervennennennenrnnnersnnnener 5 16 5 14 Power Supply Module A17 eessen 5 17 515 Rear Bottom Cover caseecceceies casnccunscetveswancscusacasvoanaasentedaansetevennes 5 19 5 16 Power Supply Module A18 ENEE 5 20 17 Calibration Module A20 ervenrenvsevnennevvevererserevnnvnennnsesesvernvenne 5 22 5 18 Deleted EE 5 23 So PP EE 5 24 5 20 A5 Ribbon Cables W1 thru W8 W11 W14 and WIS 5 25 vi TABLE OF CONTENTS Continued Page SECTION VI PERFORMANCE TESTS AND ADJUSTMENTS 6 1 Perfomance Tests eseu NEE Eegen 6 1 m alized Sep se 6 2 RP Power LOSE ans 6 2 RE Harmonics Test Zeeetiuege EEN eege 64 Pulse Or Off Ratio Test sundene 6 5 Pulse Rise Fall Test s rmserssnenesanesnoneansvennenasnarevseskenennen snb 6 6 Residuals TeSt ed 6 7 AMT be 6 8 AM Depth Test menernernarsvonevsnnrnennnrvrnsn0senerannensnenssnnnennsnene 6 9 FY Test ae 6 10 FM Penn Tete 6 11 62 Adjustments m erereorenesevonnnnvennauereanarnnnsravnennensvensenesavenavanenee 6 12 SECTION VII REPLACEABLE PARTS TE EE ithe 7 1 7 2 Replaceable Parts List meernnromnernnenanennnnnnvnnnevanenvensvarnnnevererenenr 7 1 7 3 Restored Module Exchange ee0soenannnurennonavnuvavnvenrrnnennonesererene 7 2 7 4 Ordering Informa
59. P AMPTD push button 6 To deactivate sweep mode Press START AMPTD OFF ON STOP AMPTD and then OFF ON push buttons 1 62 SWEEP TIME CALCULATIONS 1 Calculations for Stepped Frequency Sweep Calculate number of steps automatically selected as follows The number of steps is the minimum of 1023 or Start Frequency in Hz Stop Frequency in Hz or INTE GER OF Sweep Time in ms EI Min Dwell Time in ms Calculate sweep step size automatically selected as follows e The sweep size is the maximum of 1 Hz or Start Frequency in Hz Stop Frequency in Hz 1023 or Start Frequency in Hz Stop Frequency in Hz Sweep Time in ms 3 INTEGER OF Ux peel Tine Gr Calculate sweep time to select desired number of steps as follows Dwell Time 80msec when using special function 119 135msec when not using special function 119 First determine the desired number of steps is between the specified limits The maximum number of frequency steps equals the minimum of 1023 or r n in ncy in 1Hz 1 63 SWEEP TIME CALCULATIONS Continued The minimum number of frequency steps equals the minimum of 275 ms m INTEGER ve Min Dwell Time in ms i or Start E in Hz Stop F in Hz 1Hz If the desired number of steps is equal to the maximum use a sweep time setting in msec equal to or greater than the result of the following equation Number of ste
60. SHIFT FREQ to display present value Press SHIFT FREQ and using the data entry push buttons enter the new frequency amplitude reference value Displayed value will be offset from the stored frequency amplitude reference value All subsequent settings will be entered and displayed as offset from the stored frequency amplitude reference value 24A SPCL 25 26 GHz dBm push button 27 CONTROL INDICATOR OR CONNECTOR Numeric push buttons MHz V push button FUNCTION Used to enter negative numeric value for all Signal Generator Functions Push for minus Used to select special functions Push SHIFT SPCL push button followed by a valid special function number All of the single digit special functions are labeled in light grey print above digit push buttons Used to enter numeric value with decimal point for all Signal Generator Functions After data is entered terminator push buttons KHz mV etc are pressed to enter value Press desired push button Used to internally store entries from numeric push buttons Frequency functions are assigned GHz Amplitude functions are assigned dBm dB REF EMF Push for on Used to internally store entries from numeric push buttons Frequency functions are assigned MHz Amplitude functions are assigned volts Time functions are assigned seconds Push for on KENE 29 30 3 32 33 CONTROL INDICATOR OR CONNECTOR kHz mV push button Hz uV push b
61. STE SES ESSENSEN STEKE ETE TE EE EE SOS RHR ETT ET EEE ETTE EET ORT TECH ETRE DR ERE TEEN Nevnte vanen Pran EES CE EEE THOSE REED THERA NETTET ETE EE TE ee A eee OEE EERE OH TE EH HE ER AER ET HET PR Tr ROE r ENE ROR em PETE KNEKTE ES ETT EEE REHM EO t xn EET EET STE SEE EEE EA EEE ER OH Oe nud n odPhEAS HHH EEE He HEE eR v MESSE HTH EO RH RHE HEHEHE EH EH EE HH ee ERE EE OEE RHEE EHO EHH EAA EEN HEE HEHE OHO ee Oe EERE OEE UEL senere akan aNee VNR ek EE DETER TEE Ree OE ren av Remote LOG JE Local Lockout Set Local Service Request veseenaeneavnHAN EN FAP Nr Narr er vrbe rh wan TTT eee Rr eee eu TEE vere Stanis Byte see System Controller E te vente Ass tome et ere ee ee eee ee ee eee ee Page 1 46 1 46 1 46 1 47 1 47 1 50 1 50 1 51 1 51 1 51 1 52 1 52 1 52 1 53 1 53 1 53 1 54 1 54 1 54 1 55 1 55 1 61 1 61 1 61 1 62 1 63 1 68 1 68 1 68 1 68 1 69 1 69 1 70 1 72 1 75 1 76 1 80 1 81 1 83 1 83 1 84 1 86 1 87 TABLE OF CONTENTS Continued Page SECTION I OPERATING INSTRUCTIONS Continued 1 16 Writing Messages to Display RENEE 1 90 SECTION D THEORY OF OPERATION 2 1 Introduction s meerreneannvrsrerrvenesansennnrenensnrerenrnssevsenen EN 2 1 2 2 A2 Modulation Module ee 2 3 2 3 A6 FM Counter Timebase Module EE 2 5 A6 FM Loop ARR 2 6 AG Timebase enerroreennserveevnonenvvrarernnsrnansenenevevnvennnnsnsrnennr
62. Straight NEMAS 15P 36 Jade Gray Taiwan 8120 2104 Straight SEV1011 1959 24507 Type 12 Gray Switzerland 250V 8120 0698 Straight NEMA6 15P United States Canada 220V 8120 1957 Straight DHCK107 oo h 8120 2955 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 com piete cable including plug E Earth Ground L Line N Neutral 8120 1850 Straight CEE22 VI Systems Cabinet use 1 24 Operating Environment Temperature 0 C to 55 C Humidity 5 to 95 maximum wet bulb temperature 40 C Altitude lt 4570 meters 15 000 feet Airflow 5 8 mm 0 23 in minimum clearance underneath the instrument and sufficient clearance at the instrument s right side for air flow that is not obstructed 1 5 OPERATION UNDER USUAL CONDITIONS Operating procedures are broken down into individual functions and are provided starting in paragraph 1 8 Operating messages that may be encountered during operation and maintenance are listed in paragraph 1 7 1 6 TURN ON PROCEDURES 1 Apply power to the Signal Generator Signal Generator will perform a self test for approximately 30 seconds Verify that the fan on the rear panel is operating 2 After 30 seconds verify that the display has no operating message indications If MSSG Annunciator is on or display is flashing press MSSG push button and see
63. WARNING E Anx interruption of the protective grounding conductor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor out let is not sufficient protection Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to the earth terminal of the power source Servicing instructiuns are for use bv service trained personnel onlv To avoid dangerous electric shock do not perform any servic ing unless qualified to do so Adjustments described in the manual are performed with power supplied to the instrument uhile protective covers are removed Energy available at many points may if contacted result in per sonal injury Capacitors inside the instrument max still be charged even if the instrument has been disconnected from its source of supply For continued protection against fire hazard replace the line fuse s only with 250V fuses of the same current rating and type for example normal blow time delay etc Do not use repaired fuses or short circuited fuseholders l TABLE OF CONTENTS Page SECTION 0 GENERAL INFORMATION 0 1 SCOPE C
64. agraph 1 15 FR SWP SP223 LIMIT TIME E48 4048 Special Function 223 Stepped Frequency Sweep limits the minimum sweep time that can be selected Either turn off frequency sweep HP IB FAOF FBOF before setting the sweep time or refer to sequence dependency in paragraph 1 15 1 35 FREQ SWP SWP TIME LIMIT E49 4049 The start or stop frequency setting is limited by the currently selected combination of Phase Continuous Frequency Sweep Special Function 123 and the current sweep time setting and possibly the current start and stop frequency settings and possibly FM To resolve this error either 1 Turn off frequency sweep HP IB FAOF FBOF and then possibly select Stepped Frequency Sweep Special Function 223 or 2 Select a valid sweep time setting or 3 Possibly turn off FM or 4 Refer to sequence dependency in paragraph 1 15 SP123 LIMITS MIN TIME E50 4050 The minimum sweep time that can be selected is limited by the currently selected combination of Phase Continuous Frequency Sweep Special Function 123 and the current start and stop frequency settings and possibly FM To resolve this error either 1 Turn off frequency sweep HP IB FAOF or FBOF and then possibly select Stepped Frequency Sweep Special Function 223 or 2 Select a valid sweep time setting or 3 Possibly turn off FM or 4 Refer to sequence dependency in paragraph 1 15 SP123 LIMITS MAX TIME 7 E51 4051 The maximum sweep time that c
65. al functions Select either the Knob Step push buttons or a function s number RELEASE ALL KEYS P91 Release all push buttons At turn on it appears that a push button is being held down Release all push buttons to continue If a push button is not being held down your instrument may need servicing refer to the Service Manual This message cannot be read via HP IB using Output Display because it automatically clears from the display after the push button is released Also HP IB operation is halted when a push button is held down with this message displayed SPCL 3 ENTRY ERROR V12 This message occurs if the characters entered were not valid ENTER SERVICE CMD V16 This message occurs if the ASCII code entered was not recognized as valid MESSAGE 1 CLEARED V90 This message occurs when 6 5 5 is selected MESSAGE 2 CLEARED V91 This message occurs when 6 6 5 is selected MESSAGE 1 IS FULL V92 21092 This message might occur after attempting to enter codes into an already full message This message sets the Execution Error bit in the 8642 Status Byte MESSAGE 2 IS FULL V93 21093 This message might occur after attempting to enter codes into an already full message This message sets the Execution Error bit in the 8642 Status Byte 1 43 MESSAGE I UNDEFINED V94 21094 This message might occur when manipulating message 1 The message means that message 1 has not been initialized or RAM memory was lost To initialize the messag
66. ample Program provides some sample subprograms that detail a way to retrieve the Signal Generator s messages Execution Errors and Parameters Changed Messages After it receives OE or OC and is addressed to talk the first time the Signal Generator will output the message code number The second time it is addressed to talk the Signal Generator will output the message string Y ou can read only the first Execution Error message if more than one of these has occurred since either the Status Byte was cleared or since the last time OE was executed Then reading a message using OE will enable you to read out only the first Execution Error message You can read only the first Parameters Changed message if more than one of each of these has occurred since either the Status Byte was cleared or since the last time OC was executed Then reading a message using OC will enable you to read out only the first Parameters Changed message 1 76 Output Messages Continued Following is a programming example in BASIC for outputting an Execution Error OE Output either an Execution Error code number or message string from the Signal Generator address 19 and reset bit 2 of the Status Byte To output the message code number 10 OUTPUT 719 OE 20 ENTER 719 A To output the message string 10 OUTPUT 719 oB 20 ENTER 719 A Dummy read of the message code number 30 ENTER 719 A The above examples can also be modified to appl
67. an be selected is limited by the currently selected combination of Phase Continuous Frequency Sweep Special Function 123 and the current start and stop frequency settings and possibly FM To resolve this error either 1 Turn off frequency sweep HP IB FAOF FBOF and then possibly select Stepped Frequency Sweep Special Function 223 or 2 Select a valid sweep time setting or 3 Possibly turn off FM or 4 Refer to sequence dependency in paragraph 1 15 AP SWP PREVENTS FR SWP E52 4052 Amplitude sweep and frequency sweep cannot be done simultaneously Turn off amplitude sweep HP IB AAOF ABOF before attempting frequency Sweep FM PREVENTS AUTO SWP E53 4053 FM during Stepped Frequency Sweep is only possible in manual and single sweep modes Possibly refer to sequence dependency in paragraph 1 15 1 36 AUTO SWP PREVENTS FM E54 4054 FM during Stepped Frequency Sweep is only possible in manual and single sweep modes Possibly refer to sequence dependency in paragraph 1 15 FR SWP FM LIMIT ESS 4055 FM is coupled with frequency sweep and one of those settings is limiting the setting of the other This message could also have been caused by executing Special Function O or 100 when one special function was coupled to other instrument settings Either set FM deviation to a value that is allowed by start and stop frequencies or set start and stop frequencies to values that allow the FM setting or refer to sequence dependency i
68. andwidth SSB Phase Noise 127dBc Hz to 132 1875MHz 134dBc Hz 132 1875MHz to 1057 5MHz and 125dBc Hz above 1057 5MHz measured in a 1Hz bandwidth offset 20K Hz from the carrier Noise Floor 135dBc Hz to 132 187 5MHz 140dBc Hz to 1057 5MHz and i 134dBc Hz to 2 0GHz at 3M Hz offset RF OUTPUT SPECIFICATIONS RF Output Level 1 Carrier level gt 15dBm to 140dBm all frequencies and l 18dbm down to eee lt 528 75MHz Output Impedance LyjuruassaGtn S UIS I QUAERE INS P S RUN RA INE AS E QURP PNE SOQ nominal Reverse Power Protection usse 50 watts SO volts to 1000MHz and 25 watts 50 volts above 1000MHz VSWR vane lt 1 5 1 to 1000MHz and lt 2 5 1 above 1000MHz when terminated in a SOQ resistive load RE Output Corner 5 iier Lassen cue ors vein Exi ee Female Type N coaxial connector Output Level Resolution 1 ccecscsccssnosserseoscosegnavsesisea queis pnr e ER VE RUN ten eu abd ua da n eue 0 1dB Output Leveling Flatness X 1 5dB to 500MHz 2 0dB 500MHz to 1000MHz and 2 5dB above 1000M Hz Attenuator ACCHTACY ee ieee Ee 2 0dB Absolute Level Accuracy lt 0 1dB 127 to 15dBm and lt 3 5dB lt 127 to gt 15dBm 0 11 TECHNICAL CHARACTERISTICS Continued MODULATION SPECIFICATIONS Internal and external AM FM M and Pulse Modulation Amplitude Modulation Feet RT Jes 100KHz to 1057 5MHz Modulation Depth eos 0
69. aph 1 10 Tune Knob Step Increment Set e Knob Increment Knob Hold e Entry Off Display Editing MAKING RELATIVE SETTINGS paragraph 1 11 Amplitude Relative Frequency Relative SELECTING SPECIAL FUNCTIONS paragraph 1 12 Help Function Special Functions Detailed description of all Special Functions SELECTING A SWEEP paragraph 1 13 e Stepped Frequency Sweep e Phase Continuous Frequency Sweep Amplitude Sweep Sweep Time Calculations RECALLING INSTRUMENT SETTINGS paragraph 1 14 Save Recall Sequence Set Sequence 1 45 HP IB REMOTE OPERATION paragraph 1 15 HP IB Address HP IB Capabilities Data Input Data Output Output Messages Clear Remote Local Local Lockout Set Local Status Byte System Controller Additional HP IB Information WRITING MESSAGES TO DISPLAY paragraph 1 16 a 9 9 e a 9 e e LJ 1 9 SETTING INSTRUMENT FUNCTIONS RF FREQUENCY 1 On Signal Generator press SHIFT then INSTR PRESET push buttons 2 Press FREQ push button Enter the desired RF frequency from 100KHz to 2GHz using the numeric push buttons Select GHz MHz KHz or Hz 3 Verify entered frequency is displayed along with cursor and FREQ annunciator AMPLITUDE F Press AMPTD push button Enter the desired level from 140 to 15dBm using the numeric push buttons Select dBm V mV n V or dBuV Verity entered amplitude 1s displayed along with cursor and AMPTD annunciator If
70. ase Adjusiment from Knob and Step Up and Step Down Keys This function enables control over the RF signal s output phase in one degree steps using either the Knob or Step Push buttons Clear Recall Registers This special function clears all recall registers 1 13 SELECTING A SWEEP STEPPED FREQUENCY SWEEP wv AV N onm NOTE Calculations for step size number of steps to sweep time are provided under SWEEP TIME CALCULATIONS below On Signal Generator press SHIFT then INSTR PRESET push buttons Press START FREQ push button and enter desired start frequency Press STOP FREQ push button and enter desired stop frequency Press SHIFT then START FREQ push buttons and enter desired sweep time Select desired sweep mode For AUTO sweep press SHIFT then START AMPTD push button Verify data entry is correct and START FREQ SWPNG and STOP Annunciators are on For Manual sweep press SHIFT then STOP FREQ push button Turn Tune KNOB for sweep For Single sweep press SHIFT then STOP AMPTD push button To deactivate sweep mode Press START FREQ OFF ON STOP FREQ and then OFF ON push buttons PHASE CONTINUOUS FREQUENCY SWEEP OR e E NOTE Calculations for minimum sweep span maximum sweep span sweep time and X axis steps are provided under SWEEP TIME CALCULATIONS listed below On Signal Generator verify not in stepped frequency sweep mode Press SHIFT then push buttons and enter 1 2 3 Press START FREQ push
71. coupled FM FM Pre Emphasis Off This special function turns off the pre emphasis selected with Special Function 6 Low Distortion FM M Off This special function switches out the shaper circuitry inserted with Special Function 7 DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS Continued NO DESCRIPTION 209 211 212 213 214 216 Attenuator Range Hold Off This special function turns off Attenuator Range Hold selected with Special Function 9 Special Function Verify On This special function re enables the automatic display of the special function description disabled with Special Function 111 Internal External Low Rate FM Off This special function turns off the FM modulation source selected with Special Function 112 When Special Function 112 is turned off this way the Signal Generator selects internal and external ac coupled FM summed together Modulation Frequency Correction On This special function re enables the single band calibration that normally occurs whenever the modulation oscillator frequency Is set or the internal modulation oscillator is put into use Positive M Polarity This special function disables Special Function 114 and re enables the normally selected phase relationships A positive voltage applied to the external FM M INPUT causes a phase lead and a negative voltage applied causes a phase lag Positive FM Polarity This special function disables Special Function 115 and re
72. cursor above display indicating it is the active function Used to activate amplitude modulation mode When using internal source push AM then INT to activate internal modulation oscillator Push AM and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter a modulation depth from 0 to 99 9 When extemal signal source is used for AM mode press AM and enter 0 to 99 9 full scale modulation for a 1 volt peak signal applied to AM connector Actual AM depth is controlled by amplitude of input signal and AM depth selection Depth is shown with a cursor above display indicating it is the active function May be used simultaneously with either FM or Phase Modulation Used to activate Pulse modulation mode When using internal source push SHIFT AM then INT to activate internal modulation oscillator When using external signal source press SHIFT AM then EXT DC push buttons Press SHIFT AM and OFF ON push buttons to activate mode Trigger voltage is 1 5 volts Used to enter an RF frequency Push and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter a new frequency New value may be entered in GHz MHz KHz or Hz Frequency is shown with a cursor above display indicating it is the active function CONTROL INDICATOR KEY OR CONNECTOR FUNCTION 23A REF SET Used to enter or display the frequency amplitude reference Press
73. d depth or deviation Reference level is 1Vpeak 15 Not used for pulse modulation Indicate the type or types of modulation selected 3A CONTROL INDICATOR OR CONNECTOR START annunciator INT EXT AC DC AMPTD annunciator REL annunciator STOP annunciator MSSG annunciator LOCAL push button ENT ADRS SHIFT push button INSTR PRE SET FUNCTION When the START annunciator in the left portion of the display appears with the AMPTD annunciator a start amplitude is currently displayed When this annunciator appears without the AMPTD annunciator a sequence is being set Combinations of these annunciators display the current status of the modulation source for the displayed modulation type Indicates that the output amplitude is being displayed Indicates the current output amplitude is displayed in relative units Indicates that 1 stop frequency of the RF frequency sweep is currently being displayed or 2 stop amplitude of amplitude sweep is currently being displayed or 3 that sequence is being set When displayed select the Message push button to display a queued up message Used only when external controller is connected to Signal Generator When used Signal Generator is switched out of remote operation Used to display or change address Press SHIFT then LOCAL to display present address Press SHIFT LOCAL desired number from 00 to 30 then HZ uV push buttons to enter new address
74. d related documentation must be reviewed for familiarization with safety markings and instructions before operation This product is a Safety Class I instrument provided with a pro tective earth terminal BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed SAFETY EARTH GROUND An uninterruptible safety ground must be provided from the main power source to the product input wiring terminals power cord or supplied power cord set SAFETY SYMBOLS Instruction manual symbol the produet will be marked with this svmbol when it is necessary for the user to refer to the instruction manual refer to Table of Contents Indicates hazardous voltages Gr gt 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 ad hered to could result in damage to or destruc tion of part or all of the product Do not proceed bevond a CAUTION sign until the indicated conditions are fully understood and met WARNING SAFETY CONSIDERATIONS
75. d returning from remote control to local control Require Service Regardless of th addressed state of the Signal Generator whether desia to listen or to talk it can send the Require Service message Status Byte When addressed to talk after receiving the Serial Poll Enable SPE bus command the Signal Generator outputs the Status Byte Abort Regardless of the addressed state of the Signal Generator whether addressed to listen or to talk it responds to the Abort command and stops listening or talking HP IB Capabilities Local Mode Besides having the above capabilities while remote the following capabilities are also available from the local mode e Require Service Status Byte e Data Output 1 70 Table 14 HP IB Capability Reference Table Related Commands HP IB E Applicable Response Data All front panel functions special functions and remote only functions are programmable except Knob Rotation The Signal Generator can send status byte EO AH1 message and setting information The front panel SH1 LSTN and TLK annunciators turn on as appropriate when the instrument is addressed Trigger The Signal Generator does not have a device trigger capability Clear The Signal Generator responds equally to DCL and DCL SDC bus commands The Clear capability does not re SDC set instrument parameters Remote The Signal Generator s remote mode is enabled when REN the REN bus line is true However i
76. e select 6 5 5 This message sets the Hardware Error bit in the 8642 Status Byte MESSAGE 2 UNDEFINED V95 21095 This message might occur when manipulating message 2 The message means that message 2 has not been initialized or RAM memory was lost To initialize the message select 6 6 5 This message sets the Hardware Error bit in the 8642 Status Byte Table 1 2 Out of Lock Messages Message A19 OUT OF LOCK ERROR So Doubler ALC loop is out of lock TRANSIENT FAILURE Doubler ALC foop had been out of lock but now appears to be in lock Internal hardware cannot phase lock to the ex ternal reference Internal hardware had not been able to phase lock to the external reference but now ap pears to be in fock FM phase lock loop cannot track and lock to the time base FM phase lock loop had not been able to track and lock to the time base but now ap pears to be able to track and lock to the time base Output Section ALC loop is out of lock Output Section ALC loop had been out of lock but now appears to be in lock Reference phase lock loop is out of lock Reference phase lock loop had been out of lock but now appears to be in lock Sum loop is out of tock Sum loop had been out of lock but now ap pears to be in lock IF phase lock loop is out of lock IF phase lock loop had been out of lock but now appears to be in lock Heterodyne module SAW loop is out of lock Heterodyne module SAW loop had been out of lock but now
77. e Talk Addressed State The Signal Generator remains addressed to talk until It is addressed to listen Itreceives an abort message It receives some other device s talk address Tt receives a universal untalk command o Until the Power is switched from Standby to On Table 1 10 Signal Generator Function to HP IB Code Parameter Code Frequency Frequency FR Start Frequency Sweep FA Stop Frequency Sweep FB Amplitude Amplitude AP Start Amplitude Sweep AA Stop Amplitude Sweep AB EMF Mode EMON EMOF Modulation AM Depth AM FM Deviation FM M Deviation PM Pulse PLON PLOF Modulation Oscillator Modulation Frequency MF Modulation Output Level ML Modulation Source internal NT External AC XA External DC xD internal External AC BA Internal External DC BD Data Numerals 0 9 0 9 Decimal point Back Space BS Units dBm DM or OB d8 DB or DM Volt VL mv MV uv UV dBaV DU GHz GZ MHz MZ kHz KZ Hz RZ PC Active function code Parameter L Units Cont d radian second millisecond Sweep Sweep Time Auto Sweep Manual Sweep Single Sweep Relative Reference Set Relative Zero Relative Off Other Instrument Preset Partial Preset Special Function Message Output Hardware Error Output Execution Error Output Parameters Changed Output Active Function Write Service Request Mask Output HLLO Annunciator Status Clear Status Byte Step Up Step Down Incr
78. e amplitude reference was set to the OBUV reference which is 1 00 uV due to the selection of dBuV HP IB DU Subsequent amplitude displays will be in dBuV ADJUSTED 002UV RESOLN N 3 2003 Amplitude setting was adjusted to 0 002 uV resolution In EMF mode if an attempt is made to set an increment or amplitude reference with an odd number of nanovolts for example 0 501 0 503 0 505 LV etc that value will be adjusted up to an even number of nanovolts INCR AMPTD REF CHANGED C4 2004 The increment setting and amplitude reference were changed Changing between EMF and non EMF amplitude modes could cause the increment and amplitude settings to be reset to allowable values AM TURNED OFF an 2011 AM was tumed off Either START AMPTD STOP AMPTD or PULSE SHIFT AM was selected HP IB codes AA AB or PL when AM was on AM is not possible with pulse modulation or amplitude sweep FM TURNED OFF C12 2012 FM was turned off M was selected when FM was on FM cannot be done simultaneously with M PHASE MOD TURNED OFF C13 2013 M was tumed off FM was selected when M was on M cannot be done simultaneously with FM PULSE MOD TURNED OFF C14 2014 Pulse modulation was turned off Either START AMPTD STOP AMPTD or AM was selected HP IB codes AA AB or AM when pulse modulation was on Pulse modulation is not possible when amplitude sweep or AM are on SWEEP TIME ADJUSTED C21 2021 Sweep time was adjusted to the minimum
79. ecial Function 6 can be selected to pre emphasize internal or external FM modulating signals with a 750us time constant Pre emphasis boosts high frequencies in the modulating signal prior to modulating the carrier J Low Distortion FM M On This special function switches shaper circuitry into the FM M loop reducing total harmonic distortion 9 Attenuator Range Hold On When Attenuator Range Hold is selected the Signal Generator s output attenuators are fixed and the output ALC loop controls signal amplitude This produces a 30dB range with monotonic step to step amplitude increments 100 All Special Function Codes Less than 200 Off This special function turns off special functions 4 through 9 111 through 119 121 through 123 134 and 135 Sometimes all these special functions will not be turned off if the instrument state is dependent on a special function A message will be displayed to notify you if a special function remained on after you selected Special Function 100 Special functions can also be turned off individually 1 55 Table 1 3 Summary of Special Functions Function to Code Ei Special Function Description EE RF Frequency Decrement Frequency by 0 1 Hz increment Frequency by 0 1 Hz Phase Adjust by Knob or Step Keys Phase Decrement 1 Phase Increment 1 Phase Decrement 5 Phase Increment 5 Amplitude ALC Off 204 Attenuator Range Hold 209 Disable Settling 119
80. ect the type of sweep first sweep mode auto manual or single was selected without specifying the sweep type frequency or amplitude sweep Select START FREQ STOP FREQ START AMPTD or STOP AMPTD before selecting the sweep mode HP IB Specify the sweep type code FA FB AA or AB before the sweep mode code SA SM or SG PLEASE SELECT FUNCTION E6 4006 Please select an active function data value was attempted during manual sweep or when no active function existed Select a valid function before attempting to enter a data value HP IB Precede the data entry with a function prefix code SP6 PREVENTS INT EXT FM E7 4007 Special Function 6 FM Pre Emphasis On prevents the selection of a summed internal and external FM source Select Special Function 206 FM Pre Emphasis Off to select INT EXT AC INT EXT DC or Special Function 112 Internal External Low Rate FM HP IB Select SP206 before selecting FM source codes FMBA FMBD or SP112 TURN OFF SWP FIRST SP123 ES 4008 Tum off the frequency sweep before attempting those settings because Special Function 123 Phase Continuous Frequency Sweep is the type of frequency sweep currently selected Turn off either START FREQ or STOP FREQ and then try your setting again HP IB Turn off the frequency sweep with FAOF or FBOF then retry settings SP9 AM LIMIT MAX AMPTD E9 4009 Special Function 9 Attenuator Range Hold selected with the current AM setting limits amplitude
81. ed to output the entire message via HP IB Backspace to the previous character in the message Output message This code is used to display the second half of the message 1 91 ASCI Decimal Character Equivalent 32 Table 1 13 ACSI Character Codes ASCII Decimal Character Equivalent 4 52 o0mmmoogou mgQoevsliA ASCI Decimal Character Equivalent H 72 N XxXx c agmovuozzmxc
82. elect Disable ALC Off Special Function 204 before setting AM HP IB Send SP204 before AM SP4 PREVENTS PULSE E85 4085 Pulse modulation is not possible when Special Function 4 ALC Off is selected Select Disable ALC Off Special Function 204 before selecting pulse modulation HP IB Send SP204 before PL 1 39 INVALID SPCL FUNCTION E86 4686 An invalid special function number was selected Select a special function number that exists SOME SPCLS STAYED ON E87 4087 Some special functions remained selected after you selected Special Function 0 or 100 because certain special functions were coupled to other instrument settings This message will only occur if more than one special function remains on Special Function 0 or 100 not turning off just one special function will display a message describing the reason that one special function was not turned off View the special functions to see which are still on by selecting SPCL SHIFT HP IB Use SP and read the display refer to the Output Display information discussion in HP IB Remote Operation The special functions might remain selected because of a sequence dependency problem Possibly refer to sequence dependency in paragraph 1 15 0 9 HZ LIMIT REACHED E88 4088 maximum RF frequency change of 0 9 Hz can be accumulated using Special Function 240 Decrement Frequency 0 1 Hz or Special Function 241 Increment Frequency 0 1 Hz To get another 0 1 Hz step directly set the RF f
83. ement Set Knob cursor left Knob cursor right Knob Hold Knob Increment Heip Heip Off RF Off On Off On Entry Off Sequence Set Sequence Save Recall Function should be preceded by an active tunction code For example internal modulation source for AM is coded AMNT Jrhase codes will sometimes not need to be preceded by an active function code for example when using UP or DN with SV RC HP or SM 1 88 Table 1 11 Signal Generator HP IB Code to Function e varmer aal sek NT Start Amplitude Sweep Internat Stop Amplitude Sweep Output Active Function AM Depth Output Parameters Changed Amplitude Output Execution Error Internal External AC Internal External DC Sack Space Clear Status Byte dB or dBm dBm or dB Step Down dBuV Off On Output Hardware Error Output HLLO Annunciator Status Yo Pulse M Deviation Partial Preset RF Off On Recal radian Relative Off Write Service Request Mask Reference Set Relative Zero Auto Sweep second Single Sweep Manual Sweep Specia Function Sequence Set Sequence Sweep Time Save Step Up ENV Volt Externat AC Externa DC Numerals 0 9 Decimal point EMF Mode Entry Off Start Frequency Sweep Stop Frequency Sweep FM Deviation Frequency GHz Help Off Help Hz instrument Preset increment Set
84. enables the normally selected frequency shift relationships A positive voltage applied to the external FM M INPUT causes a positive frequency shift and a negative voltage applied causes a negative frequency shift DC FM Correction On This special function re enables the correction disabled by Special Function 116 DC FM Update Mode Off This special function disables the DC FM update that occurs with Special Function 117 AC Coupled DC FM Off This special function re selects the dc coupling to the FM circuitry disabled with Special Function 118 Re enable Settling This special function re enables the settling disabled with Special Function 119 Sweep Up and Down Off This special function re enables the normal sweep disabled with Special Function 121 Special Function 221 sets the Signal Generator to repeatedly sweep from the start end point to the stop end point during auto or single sweep modes Logarithmic Amplitude Sweep This special function selects the normally selected logarithmic stepped output disabled with Special Function 122 Phase Continuous Frequency Sweep Off This special function turns off the Phase Continuous Frequency Sweep selected with Special Function 123 Turn On LCD Lighting This special function turns on the LCD lighting disabled with Special Function 134 1 59 DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS Continued NO 235 240 241 242 243 244 245 248 249 250 1 6
85. ency Modulation Output Sweep Time Manual Sweep and Help can be controlled by the TUNE KNOB ad 42 43 Figure 1 2 Operator s Controls Indicators and Connectors rear view CONTROL INDICATOR OR CONNECTOR FUNCTION EXT REF INPUT connector Pulse connector HPIB Interface connector Used to connect a 1 2 5 or 10Mhz external reference to Signal Generator Input power can be no less than 0 5Vp p Maximum input is 5 volts Leave open for normal operation Impedance is 5000 Connector mates with BNC plug BNC female connector with 50 ohms input impedance used to connect an externally supplied DC to 50KHz 1 to 15 volt peak signal for pulse modulation of Signal Generator RF output Trigger voltage is 1 5 volts Accepts TTL levels Used as input and output connector for external devices during remote operation Connector has 24 pins with metric posts CONTROL INDICATOR OR CONNECTOR KEY 44 Line Power Module 45 46 Z Axis connector X Axis connector 1 20 FUNCTION Used as power input connector for Signal Generator Also contains line fuse and voltage selection facilities Voltage selection provided for operation from 100 120 220 or 240 VAC Number visible in window displays nominal line voltage for which the Signal Generator is set to operate Power input connector accepts female end of power cable supplied Protective grounding conductor connects to Signal Generator through this c
86. erator responds to a Serial Poli Enable SPE bus command by sending an B bit byte when addressed to talk Bit 6 ROS bit is true if Signal Status Byte Generator had sent the Require Service Message Each bit requires different conditions for clearing W M Signal Generator does not respond to a parallel EE EOI Abort Yes The Signa Generator saps talking or listening Commands Control lines and Interface Functions are defined in IEEE Std 488 and the identical ANSI Standard MC1 1 Knowiadge of these might not be necessary if your controllers manual describes programming in terms of the twelve HP i8 Massages shown in the bi column Service Complete HP IB capability as defined in IEEE Std 488 and the identical ANSI Standard MC1 1 is SHi AH T6 TEO L3 LEO SRi RLI PPO DC DTO C1 C2 C3 C28 E2 1 71 DATA INPUT Data can be input to the Signal Generator using either front panel keystrokes or via HP IB To address the Signal Generator via HP IB the input data information usually contains the universal unlisten command the Signal Generator s listen address the controller s talk address and a String of HP IB program codes As an example to set frequency to 123 4MHz HP BASIC OUTPUT 719 FR 123 4MZ Refer to your controller manual for command syntax and the controller s address Program Codes The Signal Generator s functions can be accessed with specific program codes These program codes are
87. esent After OH is executed one error message code or string is out put with each address to talk The Detailed Operating instruction Messages lists the error codes with their respective messages To properly retrieve alt Hardware Error information re fer to the example program in Data Output in this HP IB information section EXECUTION ERROR Syntax or function execution error Reset with an Output Execution error message to the 8642A B HP IB program code OE7 Error code that caused bit to be set can be determined by reading the Output Execution Error code or string Refer to the ex ample program in Data Output in this HP IB informa tion section instrument in loca operation Reset when remote Can be used to detect a front panel SRQ emulated by selecting the LOCAL key if not in Local Lockout The Status Byte must actually be read with this bit set for the instrument to have completed the processor delay time part of the setting change which might not include the analog settling time LOCAL REMOTE Typicaliy always set ERROR ROS IEEE 488 Reset when bits 1 and 2 are reset Reset when the ROS mask ANDed with the Status Byte ignoring bit 6 equals 0 Logical OR of bits 1 and 2 ROS mask is ANDed with the Status Byte and the result is not equal to 0 refer to Service Request for more information
88. ess Interconnections Interconnection data for the Hewlett Packard Interface Bus is provided in Figure 1 4 Hewlett Packard Interface Bus Connections Mating Connectors Interface Connector The HP IB mating connector is shown in Figure 1 4 Note that the two securing Screws are metric Coaxial Connectors Coaxial mating connectors used with the Signal Generator should be either the 50 ohm BNC male connectors or 50 ohm Type N male connectors that are compatible with those specified in US MIL C 39012 1 23 Table 1 1 AC Power Cables Available Cable Cable Plug Cable For Use Plug Type HP Part Length ES Number ee inches Pol In Country 250V 8120 1351 Straight BS1363A 90 Mint Gray United Kingdom 8120 1703 90 90 Mint Gray Cyprus Nigeria e D Rhodesia Singapore C 250V 8120 1369 Straight NZSS198 ASC112 79 Gray Australia 8120 0696 90 87 Gray New Zealand sl i N NV od 250V 8120 1688 Straight CEE Y11 79 Mint Gray East and West 8120 1692 Eug 79 Mint Gray Europe Saudi e Arabia Egypt Oo So Africa india N L unpolarized in m many nations 8120 1378 Straight NEMA5 15P 80 Black United States 8120 1398 90 80 Biack Canada 8120 1754 Straight NEMAS 15P 36 Black Japan 100V or 8120 1378 Straight NEMA5 15P B0 Jade Gray i 200V Mexico 8120 1521 90 80 Jade Gray Phillipines 8120 1676
89. gnal Generator press SHIFT then INSTR PRESET push buttons 2 Press gt or lt to position cursor in the display over digit to be changed 3 Tum the Tune KNOB to change digit to desired value STEP INCREMENT SET 1 Press desired function push button FREQ AMPTD etc then INCR SET push button and enter desired value 2 Press STEP UP DOWN push buttons to modify the displayed value with the cursor by the amount stored in step 1 KNOB INCREMENT On Signal Generator press SHIFT then INSTR PRESET push buttons Press desired function push button FREQ AMPTD etc then INCR SET push button and enter desired value Press SHIFT then push buttons Turn the Tune KNOB to modify the displayed value with the cursor by the amount stored in step 2 NOTE When changing active functions Knob Increment will continue to remain selected which means that with any functions the Knob will change the function s setting by the increment set value 3 Press SHIFT then RF OFF ON push buttons to turn off Tune KNOB KNOB HOLD i Press desired function push button FREQ AMPTD etc then SHIFT lt then OFF ON push buttons 2 Select any other desired function NOTE Two cursors over the function value indicate Tune KNOB hold step 1 Single cursor indicates active function step 2 3 Use Step Data and the OFF ON push buttons to change the active function and the Tune Knob to change the HOLD function 4 Pres
90. gt 2 7 AG Counter renernnnvnnrevvors vanveranarsrrnrrenennnnenovennuenensennneneer 2 2 4 A7 SAWR Loop Module see ENNEN 2 8 2 5 AS IF Loop Module NENNEN EE 2 10 2 6 All Reference Loop Module seem 2 12 2 7 A12 Sum Loop Divider Module een 2 14 Sum LOOP EE 2 14 Divider Lesage Eege 2 14 2 8 A13 Output Filters ALC Module 2 16 2 9 A14 Heterodyne Module een 2 18 2 10 A17 Regulators Attenuator Drivers Module e 2 20 A18 Rectifier Filter Module EEN 2 20 Power Supply EEN 2 20 A17 Drivers EEN 2 20 2 11 A19 Doubler Module EEN 2 23 SECTION DI DIAGNOSTICS 3 1 Introduction VENTURE 3 1 3 2 On Site Service Suategy ENEE 3 1 3 3 HP 8642 Service Design EE EE pen 3 1 3 4 On Site Service Overview EE 3 3 3 5 Introduction to On Site Troubleshooting een 3 3 3 6 To Begin Troubleshooting the 8642 3 5 Instrument Level Diagnostics EEN 3 9 3A 1 Introduction e sesesassvoveevannnnnvaeennevnesueranernensnrnnaennnenrenesenenr 3 9 3 8 Module Troubleshooting Order sss 3 14 Power Supply Section EE 3 17 3B 1 Introduction ME EEE EE EE 3 17 3B 2 Introduction s eonseresnrnnnrovevunenarsenesnnrvernrenevnnvnnnnnnnnennareven 3 19 A17 Inputs Verification EE 3 20 3B 3 Introduction REENEN nennt ens etn nennen nnn 3 20 iii TABLE OF CONTENTS Continued Page SECTION IH DIAGNOSTICS Continued A17 amp A18 Module Substitution susen e eelere Euge 3 21 3B 4 Todt Lee 3 21 Power Supply
91. hich sends a Service Request SRQ message to the system controller SRQ bus line true At turn on or instrument preset the RQS mask byte is set to zero effectively disabling or masking all the status bits from causing a service request message Changing the 8 bit ROS Mask Byte 1 From the Remote Mode Send RM the decimal equivalent of the binary 8 bit byte a number between 0 and 255 and the terminator HZ 1 83 SERVICE REQUEST Continued 2 From the Local Mode Select ROS MASK SHIFT INT the decimal equivalent of the binary 8 bit byte and any terminator such as HZ uV Example Enable status bits 0 End of Sweep 1 Hardware Error and 7 Parameters Changed to cause a service request SRQ bus line true by unmasking those bits that is set the Signal Generator s RQS mask to binary 10000011 decimal 131 Set the mask value to binary 10000011 decimal 131 Local operation Press ROS MASK SHIFT INT 1 3 1 HZ uV Remote operation RM 131 HZ A Service Request can be generated in either the local or remote mode To determine which status bit caused the service request refer to Table 1 9 HP IB Status Byte Bit Definitions The Status Byte can be read only by doing a serial poll via HP IB Clearing the Service Request Message The Service Request message can be cleared by masking the set bits in the Status Byte using the RQS mask If the condition which caused SRQ to be pulled has been resolved the Service Re
92. imits the maximum RF frequency value that can be selected Either reduce M deviation or select an RF frequency that allows the M deviation or refer to to sequence dependency in paragraph 1 15 FREQ LIMITS MAX PM E42 4042 The RF frequency setting limits the maximum value of M deviation that can be selected Set the RF frequency to a value in a band that allows the desired value of M deviation or select a M deviation that is allowed to the current RF frequency or refer to sequence dependency in paragraph 1 15 FR SWP AUTO LIMITATION E45 4045 Stepped Frequency Sweep cannot sweep in the Auto sweep mode under the following conditions Setting start and stop end points if one end point is less than 4 130860 MHz with a second end point greater than 132 187500 MHz Setting a Stepped Frequency Sweep across 1057 500000 MHz If neither of these restrictions apply to the attempted setting refer to sequence dependency in paragraph 1 15 TURN OFF SWEEP FIRST E46 4046 Tum off frequency sweep first To access Special Function 123 Phase Continuous Frequency Sweep turn off the start and the stop frequency that was set for the Stepped Frequency Sweep 1f this solution does not apply to your attempted setting refer to sequence dependency in paragraph 1 15 FREQ SWP SP8 LIMIT E47 4047 Stepped Frequency Sweep cannot sweep in the auto sweep mode across 132 187500 MHz Select manual or single sweep or refer to sequence dependency in par
93. ion enables you to display the numbers and descriptions of special functions Press SHIFT STEP UP push button to activate SHIFT STEP DOWN push button to deactivate Used to turn RF OUTPUT connector on or off Provides a convenient and rapid way to toggle the RF Output off and on without changing the attenuators When RF output is on Signal Generator has a normal RF signal at RF OUTPUT connector Used to disable the active function as well as all TUNE KNOB related functions When activated display will not show cursors TUNE KNOB and STEP push buttons will not change displayed values Press SHIFT RF OFF ON to activate Type N female connector with output impedance of 50 ohms used to connect Signal Generator to a load Supplies RF output over entire frequency range of 100KHz to 2 0GHz Reverse power protection up to 50 W Used to supply a 20Hz to 100K Hz sinewave signal for modulation Output level is O to 3Vpeak Output impedance is 6000 Leave open for normal operation Connector mates with BNC plug CONTROL INDICATOR KEY OR CONNECTOR FUNCTION 40 TUNE KNOB Used to vary values shown with cursor in display Clockwise rotation increases value and counterclockwise rotation decreases value Step size is either determined by value stored in INCR SET or cursor positioning push buttons Frequency Start Frequency Stop Frequency Amplitude Start Amplitude Stop Amplitude AM Depth FM Deviation M Deviation Modulation Frequ
94. ions locally you need to follow two steps 1 First select user Special Function 3 Service Mode with keystrokes SPCL SHIFT 3 Once you enter the service mode you can access the actual service special functions However you can only key in numbers and terminators selecting any other key will cause the instrument to exit this special mode and display current instrument settings 2 After you enter the service mode you can select the service special function number However the instrument only knows that you have selected a special function when you key in the HZ HV terminator For example to clear the current message in message 1 you would key in 65 5 HZ UV Table 1 12 lists the special functions that apply to both message 1 and message 2 Table 1 13 provides a list of vaild ASCII character codes Example of entering a user defined message via front panel push buttons Press SHIFT then 3 push buttons Press 6 5 5 then HZ pV push buttons Press 6 5 67 3 then HZ uV push buttons Press 6 5 6 7 6 then HZ uV push buttons Press 6 5 6 8 5 then HZ uV push buttons Press 6 5 6 8 6 then HZ uV push buttons Press 6 5 6 32 then HZ uV push buttons Press 6 5 67 2 then HZ p V push buttons Press 6 5 6 8 0 then HZ uV push buttons Press 6 5 4 then HZ p V push buttons Verify the display reads ILUV HP RED ME Et e LA m m O 1 90 Example of entering a user defined message via HP IB You can use the following example BASIC prog
95. ith pulse modulation With pulse modulation select only INT or EXT DC For other modulation sources select the modulation type of AM FM or M SHIFT EM before selecting the modulation source HP IB Send only PLNT or PLXD or ensure codes AM FM or PM are sent before XA BA or BD 1 33 PULSE MOD ONLY 27 4027 Pulse modulation can only be off or on Since pulse modulation can only be turned off or on knob rotation cursor positioning push buttons and Step push buttons cannot affect the pulse modulation function HP IB Select a function code before UP DN KL or KR AM PREVENTS PULSE MOD E28 4028 AM is not possible with pulse modulation Turn off AM HP IB AMOF before selecting pulse modulation PULSE MOD PREVENTS AM E29 4029 Pulse modulation is not possible with AM Turn off pulse modulation HP IB PLOF before selecting AM TURN OFF EMF FOR DBM E30 4030 When in the EMF mode dBm units are not possible Tum off EMF before selecting dBm amplitude units NO RELATIVE AMPTD SWP E31 4031 Relative values for amplitude sweep cannot be set directly Convert the desired relative setting value to absolute units then set the amplitude sweep in absolute units Select only FREQ or AMPTD HP IB code FR or AP before attempting relative settings NO RELATIVE FREQ SWP E32 4032 Relative values for frequency sweep are not possible Select only FREQ or AMPTD HP IB FR or AP before attempting relative settings ONLY FREQ
96. l and all control settings remain unchanged with the local to remote transition but any uncompleted messages non terminated partial entries are cleared Remote to Local Transition The Local message is the way the controller sends the Go To Local GTL bus command The Signal Generator returns to local control when it receives the Local or Clear Lockout Set Local message The Signal Generator also returns to the local mode when the front panel LOCAL push button is pressed provided Local Lockout is not in effect If the instrument is not in local lockout mode pressing the front panel LOCAL push button could interrupt a data transmission and suspend the Signal Generator in an unknown state 1 81 1 82 Table 1 8 Error Code and Message Recovery Example Program I ERROR CODE AND MESSAGE RECOVERY EXAMPLE PROGRAM 1 JWT JULY 1984 EDIT DATE 23 AUG 1984 LET Gen 719 con Gen addr Gen i DIM Mss5 174 t 0t ENABLE INTR 7 2 ON INTR 7 CALL Get message OUTPUT Gen RMIS4H2 D i t CALL User program ERD I SUB PROGRAMM TO POLL THE 8642 I AND PRINT THE MESSAGE CODES SUB Get message COM Gen addr Gen LET Byte SPOLL Gen IF BIT Byte 2 THEN CALL Execution IF BIT Byte 7 THEN CALL Change IF BITCByte 1 THEN CALL Hardware SUBEND 1 Execution SUB Execution COM Gen addr Gen OUTPUT Gen OE ENTER Gen Mssg code PRINT USING 460 Ms5sg code IMAGE EXECUTION ERROR CODE K ENTER Gen Mssg 1 74 PRINT Hssg t1
97. ll be output again in the same sequence when the Signal Generator is further addressed to talk Following is a programming example in BASIC for outputting display information Output the current display of the Signal Generator address 19 including the cursor position and annunciators Assuming a function was executed to enable you to get the display you want 10 DIM A 74 Define string big enough to handle maximum display 20 ENTER 719 AS Display String 30 ENTER 719 C 40 ENTER 719 N Cursor Value t Annunciator Value 1 79 Output Messages Continued The Signal Generator is initialized to output the alphanumeric display string first whenever you execute an instrument function for example set AM or frequency When you are using Output Display to output messages the actual front panel display will be output not the message code number that would be output if you used OC OE or OH The binary weight of the cursor positions are 21 2 for the left most cursor 22 4 for the next cursor to the right 23 8 for the next cursor to the right 2 for the nth cursor position from the left 22533 554 432 for the right most cursor The binary weight of the annunciators are provided in Table 1 7 Example With a display of LLLLELEEUE 4488 IM Alphanumeric characters output will be 100 000000MZ 140 0DM Cursor value output 4th cursor from the left will be 25 16 Annunciator value
98. ll settings of next register NOTE The NEXT message shows the next register to be called in sequence 1 15 HP IB REMOTE OPERATION The 8642 is fully programmable via the Hewlett Packard Interface Bus HP IB which can be operated with any Hewlett Packard computing controller or computer for automatic system applications For more information about HP IB refer to one or all of the following documents IEEE Standard 488 1978 ANSI Standard MC1 1 e Improving Measurements in Engineering and Manufacturing HP part number 5952 0058 the Hewlett Packard catalog of Electronic Systems and Instruments or Tutorial Description of the Hewlett Packard Interface Bus HP part number 5952 0156 All front panel functions are programmable over HP IB except Knob rotation and switching the Power from Standby to On HP IB ADDRESS The Signal Generator s address is set to 19 at the factory both in RAM memory and on an internal switch located inside the instrument You can change the address in RAM from the front panel The address stored in RAM remains valid through switching the Power from Standby to On and unplugging of the ac power cord However if the internal battery power is lost RAM memory is lost and the Signal Generator reads the address on the internal switch The internal switch address then becomes the address at turn on At any time the instrument s HP IB address can be displayed from the front panel Available Addresse
99. ll 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 oper ation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICU LAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYERS S SOLE AND EXCLUSIVE REMEDIES HP SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CON TRACT 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 this manual SAFETY CONSIDERATIONS GENERAL This product an
100. m DC to 100KHz for desired modulation rate Press FM push button and enter desired deviation from 300KHz to 1 5MHz NOTE When using external source modulation deviation setting sets the input sensitivity per volt and not actual deviation Any voltage change on the FM M input connector will change FM deviation Verify entered data is displayed along with cursor FM EXT and AC DC annunciator NOTE FM can be used simultaneously with AM or Pulse Modulation Combinations of internal and external modulation are possible using INT function To deactivate FM mode press FM then OFF ON push buttons MODULATION Continued 3 Set M Phase modulation as follows Press SHIFT then INSTR PRESET push button If internal modulation oscillator is used Press SHIFT FM then INT push buttons Press MOD FREQ push button and enter desired modulation frequency from 20Hz to 15KHz Press SHIFT then FM push buttons and enter desired deviation from 0 to 200 radians Verify entered data is displayed along with cursor M and INT annunciator If external modulation signal is used Connect 1 Vpeak 5 sinewave external input to FM M connector Do not apply more than 15V peak to the FM M input connector Select EXT AC or EXT DC push button as required Adjust external input frequency from DC to 15KHz for desired modulation rate Press SHIFT then FM push buttons and enter desired deviation from 0 to 200 radians NOTE When
101. materials identical to those used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the type of service required return address model number and full serial number Also mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number Other Packaging The following general instructions should be used for repackaging with commercially available materials 1 Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard office or service center attach a tag indicating the service required return address model number and full serial number 2 Use a strong shipping container A double wall carton made of 2 4 MPa 350 psi test material is adequate 3 Use enough shock absorbing material 75 to 100 mm layer 3 to 4 in around all sides of the instrument to provide firm cushion and prevent movement in the container Protect the front panel with cardboard l 4 Seal the shipping container securely 5 Mark the shipping container FRAGILE to ensure careful handling 0 10 RECOMMENDED TOOLS AND TEST EQUIPMENT The following list of test equipment is required for testing and servicing the Signal Generator Note that some of the equipment listed is part of On Site Service Kit INSTRUMENT CRITICAL SPECIFICATION MODEL NUMBER EN RER EE
102. n paragraph 1 15 DCFM SP117 216 LIMIT E56 4056 DC coupled FM Special Function 117 DCFM Update Mode and Special Function 216 DCFM Correction On are coupled with Special Function 123 Phase Continuous Frequency Sweep and one of those settings is limiting the selection of a frequency sweep To resolve this error either Turn off FM or Select a non dc coupled FM source or Turn off Special Function 117 or Turn on Special Function 116 DC FM Correction Off or Select a combination of those special functions or Refer to sequence dependency in paragraph 1 15 PM PREVENTS AUTO SWP E57 4057 M during Stepped Frequency Sweep is only possible in manual and single sweep modes Possibly refer to Figure 1 5 AUTO SWP PREVENTS PM E58 4058 M during Stepped Frequency Sweep is only poste in manual and single sweep modes Possibly refer to Figure 1 5 FREQ SWEEP PM LIMIT E59 4059 M is coupled with frequency sweep and one of those settings is limiting the setting of the other Either set M deviation to a value that is allowed by start and stop frequencies or set start and stop frequencies to values that allow the M setting or refer to sequence EE in paragraph 1 15 AMPTD SPAN 30DB MAX E63 4063 An amplitude span of 30 dB is the maximum possible span Either select an amplitude sweep setting within the 30 dB span limitation or turn off the other amplitude sweep start or stop value HP IB AAOF or ABOF AP SWP L
103. nfiguring the instrument in Local Lockout The Signal Generator will respond to each HP IB message below according to its associated listen or talk address Each of these capabilities is described in more detail on the pages that follow Input Data When addressed to listen with REN true the Signal Generator stops talking and can respond to input data Output Data When addressed to talk the Signal Generator stops listening and can send output data Clear Selected Device Clear SDC When addressed to listen with REN true the Signal Generator stops talking and responds to SDC by clearing any uncompleted entries or messages Clear Device Clear DCL Regardless of the addressed state of the Signal Generator whether addressed to listen or to talk it stops talking and responds to DC by clearing any uncompleted entries or messages Local When addressed to listen with REN true the Signal Generator stops talking and responds to the Local command by returning from remote control to local control i Local Lockout Regardless of the addressed state of the Signal Generator whether addressed to listen or to talk it responds to the Local Lockout command by disabling the front panel Local push button Clear Lockout and Set Local Regardless of the addressed state of the Signal Generator whether addressed to listen or to talk it responds to the Clear Lockout and Set Local command by re enabling the front panel Local push button an
104. nnneennvanvarenervnen 1 27 Parameters Changed Messages EEN 1 27 Execution Error Messages eserourenanennvennnerearnnnnravsenenanevnsernen 1 27 Hardware Error Messages oronorerrennonnnernnnvrvvrvnnanenannnnnne ANG 1 28 Information Messages ceseonsaanensennesenerrnvnrennaenennanennnsneanere 1 28 Prompt Messages arserseesnannnonersrnanseravansesessensnnnnnnneenavnnnsevem 1 28 Out of Lock Messages eenerevnaranrvennnnnenevnnrasnnnavenenanseenaner ea 1 28 Writing Messages onsoesarovsvnverrvanrennvannnausnsasvsenusavnnanuseres 1 29 When Using the Instrument Locally eene 1 29 When Controlling the Instrument via HP IB ee 1 29 Mer eda 1 29 1 8 Operating Procedures rurnnsnvnnenenrarnrnnnnnevnnenevsnrnrnnnnarnnesnsnnerer 1 46 SECTION I 1 9 1 10 1 11 1 12 1 13 1 15 TABLE OF CONTENTS Continued OPERATING INSTRUCTIONS Continued SEHE Instrument Functions isses veee va ees duc pos uv e cur enr es FER na EE RF Freguenty gees Amplitude eet geNbE Off OST Modulation e Modulation Oscillator En COM OO SETTET EE ESTE ETTE EE ET PETTEE TEKE TETTE ESTE SEE ET EE EEE PEKES OH EK TS ATT ETTE FERED SE EHETHE RE ET H ED PEST EET ESTE ESTE TE ES EEE HE HOTTA HO Re ws Simultaneous Modulation Source NEEN Modifying Settings Tune Knob e eeeeeror rene Step Increment Set Knob Increment Knob Hold Gage ege Enty Ne
105. not start a sweep TUNE knob or the STEP push buttons control frequency amplitude sweep Beginning frequency amplitude is controlled by START push button ending frequency amplitude is controlled by STOP push button and step size is controlled by TIME push button Sweep time of each step is controlled by operator Press SHIFT then STOP FREQ push button to activate Used to enter or display a starting frequency in sweep mode Press to display present start value in the display Press and use data entry push buttons to enter a new start frequency Start frequency may be less than or greater than stop frequency 1 5 CONTROL INDICATOR KEY OR CONNECTOR FUNCTION 8A 9A 10 1 6 START AMPTD push button AUTO STOP AMPTD push button Used to enter and display time interval between START FREQ to STOP FREQ or START AMPTD to STOP AMPTD Press SHIFT and hold START FREQ to show present time value in display To enter a new time press SHIFT START FREQ push button enter desired time using data entry push buttons and press MHz V sec or KHz mV msec push button Allowable values for frequency time range are 275msec Smsec for phase continuous sweep to 999sec in lmsec increments The minimum calculated step size is 1Hz Allowable values for amplitude time range are 20msec to 999sec in lmsec increments The minimum calculated step size is 0 1dB Used to enter or display a starting amplitude in sweep mode Press to
106. onnector Line power fuse is 3 amp 250 volts for 100 120 VAC operation and 2 amp 250 volts for 220 240 VAC operation Remove power cable slide plastic window over connector and pull extractor to remove fuse Connection providing a TTL positive true blanking pulse for external oscilloscope display blanking during retrace Leave open for normal use Connector mates with BNC plug Connection providing a 0 to 10Vdc 10 voltage stepped output for use with an external oscilloscope Leave open for normal use Connector mates with BNC plug Used for a signal reference to synchronize external devices to Signal Generator Output power is gt 1 4Vp p at 50O Output frequency is 10MHz Output impedance is 75Q Leave open for normal operation Connector mates with BNC plug 1 2 INSTALLATION The following paragraphs provide the information needed to install the HP 8642 Synthesized Signal Generator Included is information pertinent to initial inspection power requirements line voltage selection power cables interconnection and environment 1 3 INITIAL INSPECTION To avoid hazardous electrical shock do not perform electrical tests when there are signs of shipping damage to any portion of the outer enclosure covers and panels Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and
107. ons This coupling can limit the execution of a setting when one function limits the setting of the other For example amplitude and AM depth are coupled functions An AM depth of 99 0 is possible only when the amplitude setting is between 140 0 and 14 0 dBm Therefore changing this setting Amplitude 14 dBm AM depth 99 to this setting Amplitude 15 dBm AM depth 75 would not be possible if the amplitude entry was attempted before the AM setting AM could be changed first to achieve the setting but setting AM first would not always be successful For example if you were changing back to the first example to an amplitude of 14 dBm and AM depth of 99 setting the AM first would not set the requested AM setting To eliminate this sequence dependency problem when setting AM or amplitude first mm off AM then set the amplitude then set the AM depth How to Avoid Sequence Dependency Problems The Operating Instructions describe the limitations of specific coupled functions and will help you avoid entering incorrect sequences Also when operating locally displayed Execution Error messages direct you to your entry error However if operating via HP IB it might be inconvenient to rely either on the manual or on error messages for every combination of settings Flowcharts of Sequence Dependency can assist in the development of driver subprograms to eliminate the consequences of sequence dependency If you follow the flowchar
108. output for FREQ and AMPTD will be 2 220 32 1 048 576 1 048 608 Outputting the display could be used to output the currently selected special functions or to output the annunciator value t determine the current modulation source CLEAR The Signal Generator responds identically to Selected Device Clear SDC and Device Clear DCL bus commands by clearing any message or uncompleted entries For example a command of FR 100 would be cleared because no units terminator has been specified Also with the Clear command Clear Status Byte occurs possibly clearing up to 6 status bits The Clear command does not affect instrument settings However selecting Instrument Preset IP Partial Preset PP or turning the Power from Standby to On will reset instrument settings as described in the Operating Instruction Instrument Preset Partial Preset 1 80 Table 1 7 Output Display Binary Weight of Annunciators Frequency TLK SRQ 16 FREQ 32 REL 64 Frequency 128 256 512 1 024 2 048 4 096 8 192 16 384 32 768 65 536 131 072 262 144 524 288 1 048 576 2 097 152 Amplitude STOP 4 194 304 MSSG 8 388 608 REMOTE LOCAL Local to Remote Transition The Signal Generator goes remote when it receives the Remote message The Remote message has two parts 1 Remove Enable bus control line REN set true 2 Device listen address received once while REN is true The Signal Generator s output signa
109. pecial Functions That Can ASCII Character Codes be Used to Write to the Display POSTET ETE KA KEKE SES KE TESTES EET PAM T HH ORD WR GEOL BIS eee NE W P2 Control Bits WI1P2 Control Bits MOREE 9 nO EE TERRE EEE ETH EET EE EH EME ERE SHER EH EE HE EHH P RAM ERED OH WEARER ERE ew REESE EH HT ODER THEE ERNE TE BUR ETO TERRE ener ere rar den AST Conto BIS Ran ST On BE seen W3P2 Control Bits POOR veka aner nn PP TT OR Nede re enken emner ekte Nevea ASIS GT BE attente e dee WSP2 Control Bits W5P2 Control Bits 9 hehe 9 AT ES EEE EE kb PH ERE HEHE EFRON EEE HE EM EHH EOE ee TESTET EE ee ESA ESTE EEE EE PST SOMO BE vekene dere A575 Control Bite Eeer gen W7P2 Control Bits Be rek vasen ERT meu TO EE ker ee kreerte ABSIT EON TOT BIE ane Attenuator Relay Selection Troubleshooting Suggestion et 9 Oe EERE ER EHH EM EH NEE EE AE HE EE EH EE EE HEH SEER EER NEED s for Condition 4 EE Exceptional Cases Troubleshooting Suggestions E Service Special Functions for Exceptional Cases e ees Replaceable EE Code List of Manufacturers PETE TESS NET EEE RENE TR KEENE EH EEO REE OHH Add Page 1 24 1 44 1 56 1 71 1 72 1 78 1 81 1 82 1 86 1 88 1 89 1 91 1 92 3 96 3 119 3 121 3 125 3 127 3 183 3 187 3 238 3 240 3 242 3 244 3 312 3 315 3 350 3 375 3 376 3 378 7 4 7 6 No 1 1 1
110. ps 1 X Min Dwell Time in msec If the desired number of steps is less than the maximum use a Sweep time setting in msec equal to or greater than the result of the above equation but less than the following equation Number of steps 2 X Min Dwell Time in msec Calculate sweep time to select desired step size as follows First determine the desired step size is between the specified limits The maximum step size equals the maximum of 1 Hz or Start Frequency in Hz Stop Frequency in Hz 275 ms INTEGER SE Min Dwell Time in ms i 1 e The minimum step size is equal to the maximum of 1Hz or i i 1023 Ifthe desired step size is equal to the minimum use a sweep time setting in msec equal to or greater than the result of the following equation Start Frequency in Hz Stop Frequency in Hal Step Size in H3 1 X Min Dwell Time in ms 1 64 SWEEP TIME CALCULATIONS Continued If the desired step size is greater than the minimum use a sweep time setting in msec equal to or greater than the result of the above equation but less than the following equation Start Frequency in Hz Stop Frequency in Hz baleia Dol Tine in ad Step Size in Hz 2 Calculations for Phase Continuous Frequency Sweep Divide Number 1 for frequencies up to 132 187500MHz 4 for frequencies from 132 1875001 to 264 375000MHz 2 for frequencies from 264 375001 to 528 750000MHz
111. quest message can be cleared with any of the following actions for clearing the Status Byte Sending Clear Status CS Sending Instrument Preset IP Sending Device Clear or Selected Device Clear Switching Power from Standby to On Resetting the individual set bits Refer to Table 1 9 STATUS BYTE The 8642 Status Byte consists of one 8 bit byte which reflects Signal Generator status All 8 status bits are updated whether the Signal Generator is in local or remote mode Each bit of the Status Byte monitors a particular aspect of the Signal Generator s operation Table 1 9 HP IB Status Byte Bit Definitions details the operating conditions which are monitored by the 8642 Status Byte The Status Byte can either be used to cause a Service Request or simply be read to monitor the Signal Generator s operating status Reading the Status Byte To read the Signal Generator s Status Byte the controller must send the Serial Poll Enable bus command and address the Signal Generator to talk For example Program Statement in BASIC 10 S SPOLL 719 1 84 CONDITIONS m ERROR READY LOCAL EXECUTION HARDWARE END OF CHANGED A REMOTE ERROR ERROR SWEEP STATUS BYTE DEFAULT VALUE BIT WEIGHT 6817 6 GF THE ROS MASK DOES NOT ENABLE ANY CONDITION THUS IT CAN BE TRUE OR FALSE AND HOT AFFECT ROS in SO TET VALUE FOR THE MASK IS BINARY 00000000 DECIMAL 0j SERVICE REQUEST MESSAGE Figure 1
112. ram to enter a Message string of 49 characters into Message 1 10 DIM C 49 DIMENSION 49 CHARACTER STRING 20 30 INPUT C INPUT CHARACTER STRING FOR MESSAGE 1 40 50 OUTPUT 119 SP3655EN CLEAR MESSAGE 1 IN THE 8642A B 60 70 LET L LEN CS DETERMINE LENGTH OF MESSAGE 1 80 t 96 100 FOR I 1 TO L CONVERT EACH CHARACTER IN C TO 110 LET A NUM CSII I l ITS EQUIVALENT ASCII NUMERIC 120 OUTPUT 719 USING 130 A CODE 130 IMAGE SP3656 K EN 140 NEXT I 150 160 170 OUTPUT 719 SP365T7EN DISPLAY THE MESSAGE 180 190 END Example of Reading a User Defined Message Via HP IB You can use the following example BASIC program to read the Message I string 10 DIM C 49 DIMENSION 49 CHARACTER STRING 20 OUTPUT 719 SP3657EN DISPLAY MESSAGE 1 30 ENTER 719 C 1 READ MESSAGE 1 40 END Table 1 12 Special Functions that can be Used to Write to the Display Special Functions Message 1 Message 2 Description Underline the characters not yet de fined in the message Take out the underlines from the char acters not yet defined in the message Clear the stored message to enable writing another message Get ready to write the next sequential Character in the message This special function code is followed by the deci mal equivalent of an ASCH character Output the message This code is used to display the first half of the message This code is also us
113. rear panel is shown in figure 1 2 SEE VIEW A 042100 Mate EA BGAZM SIGNAL GENERATOR MERLET PARADI SEE VIEW E SEE VIEW C SEE VIEW D FRONT VIEW SEE VIEW B Figure 1 1 Operator s Controls Indicators and Connectors front view T3 1 2 CONTROL INDICATOR OR CONNECTOR MESSAGE push button Display RMT LSTN TLK SRQ START annunciator FREQ annunciator REL annunciator EMF annunciator SPCL annunciator SWPNG annunciator HILO annunciators M FM AM annunciators FUNCTION When pressed queved up operating messages are displayed MSSG annunciator and flashing display are indications that messages are present Press SHIFT MESSAGE push buttons to view previous messages Displays various Signal Generator messages and settings The cursor designates which Signal Generator function is active These annunciators indicate the HP IB status of the Signal Generator Indicates that RF frequency sweep is selected and a start frequency is currently displayed or that a sequence is being set Indicates the RF frequency is being displayed Indicates the current RF frequency is displayed in relative units Indicates the current amplitude is in EMF units Indicates a special function is currently selected Indicates that either an RF frequency or amplitude sweep is currently taking place Used to indicate whether the external modulation source level is too high or too low to obtain the displaye
114. repeatedly to see the RF frequency addition message Note that reading these messages over the bus using MG could cause transient hardware and service messages to be deleted from the message list CRUNCH CRUNCH MMMMMMM 160 Amplitude sweep is possible and is currently being set This message cannot be read via HP IB using Output Display because it automatically clears from the display after execution completes 1 42 SPCLS OFF ENTER NUMBER P0 All special functions are off To select a special function select its number MIT MSSG FOR EACH MSSG Pi More than one message is in the message list select MSSG HP IB CODE MG to see each message HP IB Note that when retrieving a message list using the OH command when more than one message exists this is the first message you will receive in the list Refer to the Output Messages discussion in paragraph 1 15 OFF ON SELECTS EMF ON P2 The EMF mode is off Select OFF ON HP IB EMON to select EMF on OFF ON SELECTS EMF OFF P3 The EMF mode is on Select OFF ON HP IB EMOF to select EMF off HIT OFF ON HOLD FUNC P4 Knob Hold is off to hold the active function on the Knob select OFF ON HP IB Send the HP IB code of the desired active function followed by KHON HIT OFF ON HOLD OFF P5 Knob Hold is on to turn off the Knob Hold function select OFF ON HP IB KHOF USE KNOB UP DN NUMBER P11 The Help function allows you to view the descriptions and code numbers of speci
115. requency offset is then corrected and the dc coupled signal is switched back on DC FM Correction Disabling this correction causes a decrease in switching time by approximately 200ms DC FM Update Made On With the FM loop unlocked RF output frequency changes with a change in applied dc signal and with the normal drift of an unlocked VCO that occurs over time and temperature In the DC FM Update Mode the Signal Generator measures and displays these RF frequency changes DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS Continued NO DESCRIPTION 118 119 121 123 AC Coupled DC FM Om When the Signal Generator is in the normal ac coupled FM mode the external signal is applied to the FM loop through circuitry that uses a phase lock loop to ensure the accuracy of the output signal In dc coupled FM DC FM the phase lock loop is unlocked and the external signal is applied directly to the unlocked VCO With Special Function 118 selected the input signal is ac coupled to the unlocked FM VCO blocking any applied dc component Typical low frequency corner frequency is 1 Hz Using DC FM avoids the phase shifts associated with ac coupled FM circuitry and allows maximum stereo separation An external dc coupled FM source must be in use with Special Function 118 to get these benefits Disable Settling This special function allows the Signal Generator s microprocessor to respond to new commands without waiting for the internal circuitr
116. requency to 1 Hz resolution SAVE RECALL MAX 50 E 92 4092 The maximum recall register number is 50 Select register numbers only between 00 and 50 RECALL NOT DEFINED E93 4093 No instrument settings are saved in this register The register could have been cleared with Special Function 251 Clear Recall Registers or because of a hardware error This error E93 occurs simultaneously with hardware error H 10 SEQ NOT SET 4 DIGITS E94 4094 Sequence was not set 4 digits are required Try the sequence setting again using two digits for both the start and stop sequence register numbers ADRS VALID 0 30 ONLY E95 4095 HP TB addresses are valid only between 0 and 30 Select an HP IB address between 00 and 30 or select 31 for Listen Only capability MASK VALID ONLY 0 255 E96 4096 The RQS mask is valid only between decimal 0 and 255 Set the RQS mask between those values HIT AMPTD CLEAR RVS PWR H1 7001 Press the AMPTD push button to reset the reverse power protect circuitry A reverse power condition has been sensed After this condition is eliminated select the AMPTD push button to reset the protection circuitry HP IB Send AP after the condition is eliminated Message H2 will always occur after the reverse power protect circuitry is reset in response to message H1 RVS PWR PROTECT CLEARED H2 7002 The reverse power protect circuitry was previously tripped but is now reset 1 40 RECALL ERROR FOUND H10 7010 A recall error
117. ric value or as a string that represents the HI and LO annunciators l Annunciator Numeric Value String Representation Representation HI 1 HI LO I LO neither HI nor LO 0 OK Following is a programming example in BASIC for outputting HI LO status OL Output from the Signal Generator address 19 the status of its HI LO annunciators for an external ac coupled AM signal To output the numeric value 10 OUTPUT 719 AMOL 20 ENTER 719 V To output the string 10 OUTPUT 719 AMOL 20 ENTER 719 V 30 ENTER 719 A Dummy read of the numeric value Output Display Information The Signal Generator will output the display information when it is addressed to talk and is not configured to output any other data 1 The first time the Signal Generator is addressed to talk it will output the actual display in alphanumeric characters maximum of 74 characters The string length of the alphanumeric display will always be greater than or equal to 25 characters 2 The second time the Signal Generator is addressed to talk it will output a number representing the displayed cursor positions in a binary weighted sum This string length will always be less than 25 characters 3 The third time the Signal Generator is addressed to talk it will output a number representing the displayed annunciators in a binary weighted sum This string length will also always be less than 25 characters Each item in the sequence above wi
118. rrect voltage and fuse have been selected rear panel line power module permits operation from 100 120 220 or 240 Vac The number visible in the window located on the module indicates the nominal line voltage to which the instrument must be connected Verify that the line voltage selection card and the fuse are matched to the power source Refer to Figure 1 3 Line Voltage and Fuse Selection Operating voltage is shown in module window Selection of Operating Voltage i Open cover door pull the FUSE PULL lever and rotate to left Remove the fuse 2 Remove the Line Voltage Selection Card Position the card so the line voltage appears at top left corner Push the card firmly into the slot 3 Rotate the FUSE PULL lever to its normal position insert a fuse of the correct value in the holder Close the cover door Figure 1 3 Line Voltage and Fuse Selection Two fuses are supplied with each instrument One fuse has the proper rating for 110 120 Vac line operation HP part number 2110 0003 3A 250V non time delay The other fuse is rated for 200 220 Vac operation HP part number 2110 0002 2A 250V non time delay One fuse is installed in the instrument at the time of shipment The rating of the installed fuse is selected according to the line voltage specified by the customer If the voltage is not specified the rating of the installed fuse will be selected according to the country of destination For protection again
119. s Any address from 00 to 30 can be assigned to the instrument Setting an address of 31 establishes the Signal Generator as a listen only device The listen only mode causes the instrument to allow either HP IB or local operation However any push buttons pressed while the Signal Generator is receiving HP IB information could suspend the instrument in an unknown state Also with this address setting the HP IB control lines should be left open circuited IFC ATN REN SRO and EOI 1 To Display the current address from the front panel Press SHIFT then LOCAL push button 2 To Change the current address from the front panel Press SHIFT then LOCAL push button and enter the new address from 00 to 31 Press Hz uV push button NOTE Setting the address from the front panel when the instrument is in its service mode will disable any activated HP IB control capabilities 1 69 HP IB CAPABILITIES The 642 Signal Generator is designed to be compatible with a controller that interfaces in terms of the 12 bus messages summarized in the HP IB Capability Reference Table The bus functions are discussed in more detail in the following text The Signal Generator s complete capability as defined by IEEE Standard 488 and the identical ANSI Standard MC1 1 is described at the bottom of Table 1 4 In remote mode all front panel controls are disabled except the Power switch and the Local push button the Local push button can be disabled by co
120. s SHIFT then lt push buttons to turn off Tune KNOB hold ENTRY OFF E Press SHIFT then RF OFF ON to disable Knob Hold Knob Increment Tune Knob Step and Data push buttons until an active function is selected NOTE All cursors will disappear from the display showing there is no active function DISPLAY EDITING l Press BACK SP push button to erase least significant digit 2 Press SHIFT then SHIFT to resume normal operational display 1 11 MAKING RELATIVE SETTINGS AMPLITUDE RELATIVE i 2 On Signal Generator press SHIFT then INSTR PRESET push buttons If amplitude reference value is to be transferred from present amplitude output Verify displayed amplitude value is the desired reference value Press SHIFT then AMPTD push buttons NOTE Amplitude that was present in display is now stored reference value Displayed amplitude will be zero All subsequent amplitude entries will now be offset from the reference setting stored Verify AMPTD and REL annunciators are on If amplitude reference value is to be entered Press SHIFT then FREQ push buttons and enter the desired reference setting NOTE Displayed amplitude and all subsequent amplitude entries will now be offset from the reference setting entered in previous step Verify AMPTD and REL annunciators are on To deactivate Relative Mode press SHIFT then OFF ON push buttons 1 53 FREQUENCY RELATIVE On Signal Generator
121. s Verification eonreronnerenrremnr a 3 297 Introduce HOD avskoget 3 297 A14 Power Level Diagnostics ecce eene 3 298 house Gene 3 298 A14 Module Diagnostics REENEN eere eee 3 299 A16 Attenuator Module vue eekiredege ANNE ENEE Nee EEN endene 3 333 A19 Doubler Attenuator Module ERE 3 335 SE E NEE 3 335 A19 Module Substation 4 oo ues eoe torpor uUo deua assvidadducsursaeencctouve 3 336 Up CRUG Sostieni D RO aM EE ER 3 336 A19 Inputs Verification eeseesernunernnrvnsnsannenvrsanevansannvnnvenannennenr 3 337 introduction iuvet ooo EE E 3 337 A19 Module Diagnostics s0rrnernnnvnnevnnvennnnarnvnrnnnrnn nanenarnrner 3 338 Exceptional Cases ee ERENNERT 3 371 IntrOduCtlon EE 3 371 Exceptional Case Descriptions EE 3 371 Troubleshooting Suggestions EEN ENEE 3 371 Exceptional Case see ERENNERT 3 372 TABLE OF CONTENTS Continued Page SECTION DI DIAGNOSTICS Continued 30 5 Exceptional Case E 3 376 30 6 Exceptional Case 3 ernsesserrerssanereonensnerenenesnnvavnsenrvvrnesnesnrer 3 376 SECTION IV REPLACING A MODULE 4 1 Inroducnon AE Stee Re 4 1 SECTION V MECHANICAL PROCEDURES 5 1 Iptroduc ho E 5 1 Er Too se 5 3 Top 0 EE ER 54 54 RF Modules A6 A7 A9 A11 A12 A13 Al4 and AIG 5 5 5 5 Control Module Ad eee possano sd see se NR EU RUE 5 6 6 Control Module AS 1a terere sociis tna Ee EE 5 7 5 7 gt Front Panel EE 5 8 SE Deleted EE 5 10 59 RF
122. sitioning cursor in display If cursor positioned over 3rd digit knob will increment decrement 3rd digit gt moves cursor to right lt moves cursor to left Will not move cursor from one function to another frequency to amplitude Push to move Used to maintain TUNE KNOB control over one function while allowing any other function to be controlled by STEP or data entry push buttons Dual cursors indicate the function that is controlled by the TUNE KNOB while a single cursor indicates the function controlled by STEP or data entry push buttons Push SHIFT lt OFF ON to activate Used to set the TUNE KNOB indrement to the value entered and stored as INCR SET Press SHIFT gt to transfer the increment value to the TUNE KNOB 36A 37 38 39 CONTROL INDICATOR OR CONNECTOR STEP UP DOWN push buttons HELP RF OFF ON push button RF OUTPUT connector MOD connector FUNCTION Used to vary values shown with cursor in display UP push button increases value and DOWN push button decreases value Step size is determined by default value or value previously stored in INCR SET Frequency Start Frequency Stop Frequency Amplitude Start Amplitude Stop Amplitude AM Depth FM Deviation M Deviation Modulation Frequency Modulation Output Sweep Time Manual Sweep Save Recall and Help can be controlled by the STEP push buttons Press for on Press and hold to repeat The Help funct
123. ssage listing in this instruction the message code number that can be output over HP IB is provided to the far right of the message If no message code number is provided in the listing then that message can be read over HP IB using Output Display unless otherwise stated If any unique message retrieval procedures exist for a message they will be described in the individual message description Also any message that cannot be read via HP IB will be noted Many of the messages that can be output over HP IB can be made to initiate a service request NO MESSAGES 00 0 No messages are queued up to be displayed or output over HP IB HP IB This message may be output with OH or MG in combination with Output Display NO MESSAGE 00 0 No message is available for output over HP IB This message is never displayed locally HP IB This message may be output with OC or OE 1 29 END OF MESSAGE LIST 00 0 The end of the copied list has been reached This message is viewed after displaying the entire copied message list by repeatedly selecting the MSSG push button HP IB This message may be output with OH or MG in combination with Output Display FR SWP PULSE TURNED OFF CI 2001 RF frequency sweep with pulse modulation was turned off Either START AMPTD or STOP AMPTD was selected HP IB AA or AB when RF frequency sweep was on with pulse modulation AMPTD REF SET TO 1 00UV C2 2002 Amplitude reference was set to 1 00 uV Th
124. st fire hazard the line fuse should only be a 250V normal blow fuse with the correct current rating Power Cables BEFORE CONNECTING THIS INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the line power cord The line plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection This instrument is equipped with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds the instrument cabinet The type of power cable plug shipped with each instrument depends on the country of destination Refer to Table 1 1 for the part numbers of the power cables and line plugs available HP IB Address Selection The Signal Generator s address is set to 19 at the factory both in RAM memory and an internal switch located inside the instrument The address stored in RAM remains valid through switching the power from standby to on and unplugging of the ac power cord unless the internal battery power is lost which would cause RAM memory to be lost If RAM memory is ever lost the address on the internal switch is read and becomes the address at turn on Refer to HP IB operation for procedures to set the Signal Generator s HP IB addr
125. t HP 10631B 2 metres 6 6 ft HP 10631C 4 metres 13 2 ft HP 10631D 0 5 metres 1 6 ft Cabling Restrictions 1 A Hewlett Packard Interface Bus system may contain no more than 2 metres 6 6 ft of connecting cable per instrument 2 The maximum accumulative length of connecting cable for any Hewlett Packard interface Bus system is 20 metres 65 6 ft Figure 1 4 Hewlett Packard Interface Bus Connections 1 26 1 7 OPERATING MESSAGES Some operator actions and Signal Generator failures cause operating messages If a message appears in the display or MSSG Annunciator lights or the display flashes press MSSG push button to display message Operating Messages are grouped into seven categories as follows Parameters Changed Messages Execution Error Messages Local These messages are automatically displayed except for C32 and C33 HP IB All of these messages can be output via HP IB using OC Parameters Changed messages message code is prefixed with C inform you that the Signal Generator has changed some other setting to allow a new setting Some of the Signal Generator s functions cannot occur simultaneously with other functions so the Parameters Changed message indicates the Signal Generator has automatically adjusted or turned off the functions that are preventing the new setting These messages occur immediately after executing a command that causes some other parameter to automatically change HP
126. t remains in local MLA ie the keyboard is active until it is first addressed j T Local Local Key is disabled during Local Lockout so only LLO Rit Lockout the controller or the POWER switch can return the Signal Generator to local BAN RE to listen The output signal is unchanged when the Clear Lockout Generator returns to local and Local Lockout is no Set Local longer true when the REN bus fines goes false Interface Functions Signal Generator enters the remote mode The front panel RMT annunciator turns on when in remote mode The Signal Generator returns to front panel control when it enters the loca mode The output signal is unchanged Responds either to the GTL bus command or the front panel LOCAL key The LOCAL key will not work if the instrument is in the Local Lockout State Pass Control The Signal Generator cannot pass or take control of ATN CH Take Control HP IB However it does have limited control capability IFC C2 that is intended for servicing the instrument This con C3 trol capability is accessed with Service Special C28 Functions Require The Signal Generator sets the SRQ bus line true if SRQ SR1 one of the following conditions exists and it has been enabled by the ROS mask to send the message for that condition Parameter Changed Error Ready Local Remote Execution Error Hardware Error or End of Sweep The Signal Gen
127. t to AM connector Do not apply more than 15V peak to the AM input connector Select EXT AC or EXT DC push button as required Adjust external input frequency from DC to 100KHz for desired modulation rate Press AM push button and enter desired depth from 0 to 99 9 NOTE When using external source modulation depth setting sets the input sensitivity per volt and not actual depth Any voltage change on the AM input connector will change AM depth Verify entered data is displayed along with cursor AM EXT and AC DC annunciator NOTE AM can be used simultaneously with FM or M Phase Modulation Combinations of internal and external modulation are possible using ENT function To deactivate AM mode press AM then OFF ON push buttons 1 47 MODULATION Continued 2 Set FM as follows L 1 48 Press SHIFT then INSTR PRESET push button If internal modulation oscillator is used Press FM then INT push button Press MOD FREQ push button and enter desired modulation frequency from 20Hz to 100KHz Press FM push button and enter desired deviation from 300KHz to 1 5MHz Verify entered data is displayed along with cursor FM and INT annunciator If external modulation signal is used Connect 1 Vpeak 5 sinewave external input to FM M connector Do not apply more than 15V peak to the FM M input connector Select EXT AC or EXT DC push button as required Adjust external input frequency fro
128. t without a function prefix The first two characters in the output string will designate the active function If the Signal Generator does not have an active function when it receives OA without a function prefix it will output the display string which is the default HP IB output Table 1 6 Output Active Function String Formats Sving Format Frequency FR sdddddddddd 0 HZ Value could be negative if Frequency is relative Ampiitude in dBm fin dB relative dB EMF relative dBuV AP sddd d DM or dB EMF uV AP sddd d DB in volts or EMF volts AP d ddddddddd VL AM AM dd d PC FM SM Modulation Frequency Modulation Output Level Start Frequency Stop Frequency Start Amplitude in dBm in volts or EMF volts Stop Amplitude FM ddddddd 0 HZ PM ddd dddddd RD MF dddddd d HZ ML d dddd VL FA dddddddddd 0 HZ FB dddddddddd 0 HZ AA sddd d DM AA d ddddddddd VL in dBm AB sddd d DM in volts or EMF volts AB d ddddddddd VL Sweep Time ST ddd ddd SC Leading zero digits greater than the one s digit are suppressed 1 78 Output Messages Continued Output HI LO Status OL Output HI LO status enables an HP IB Controller to monitor the level of the external modulation signal by configuring the Signal Generator to output the status of the HI LO annunciators for AM FM or M The status can be read as either a nume
129. the instrument has been checked mechanically and electrically Procedures for checking electrical performance are given in Section VI If the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for the carrier s inspection 1 4 PREPARATION FOR USE Power Requirements The Signal Generator requires a power source of 100 Vac 90 to 105 Vac 120 Vac 108 to 126 Vac 220 Vac 198 to 231 Vac or 240 Vac 216 to 252 Vac 47 5 to 440 Hz single phase Power consumption is 260 VA maximum 270 VA during attenuator switching This is a Safety Class 1 product i e provided with a protective earth terminal An uninterruptible safety earth ground must be provided from the power source to the product input wiring terminals power cord or supplied power cord set Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an external autotransformer for voltage reduction make sure that the common terminal is connected to the earthed pole of the power source BEFORE PLUGGING THIS INSTRUMENT into tbe Line voltage be sure the co
130. the recall registers in ascending sequence Range is determined by SET SEQ Used to select a particular range of recall registers to be viewed Press SHIFT SEQ push buttons and enter desired start and stop registers from 00 to 50 The OFF ON push button toggles an active function off or on with a single push button stroke When OFF ON is used to activate a function it turns on to the default value or value previously stored The OFF ON push button can also be used to tum on or tum off the EMF mode a Reference Set value the Knob Hold mode or the Help mode off only Used to turn off Frequency Amplitude Relative Mode Press SHIFT OFF ON Used to enter a Modulation frequency when using internal modulation oscillator in AM FM and M modulation modes MOD connector output frequency is also entered by MOD FREQ push button Push and use either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button to enter anew modulation frequency New value may be entered in KHz or Hz Modulation frequency is shown in display 21A 22A 23 CONTROL INDICATOR OR CONNECTOR MOD OUT _ AM push button PULSE FREQ push button FUNCTION Used to control the output level from the MOD connector Press SHIFT MOD FREQ push buttons and enter an output level from 0 to 3Vpk using either data entry push buttons TUNE KNOB STEP push buttons or the OFF ON push button Modulation output level is shown with a
131. tion eseonnnnannnonnernnnernnnnnrnnenenevnennsnnnnnnn radener 7 2 7 5 Packaging Information eeeerervarnernrasenvannenseresaveranannsevnnsarenennr 7 3 7 6 Parts List Updating scicsiccescessonsivnsasvnstinsnnnasnacenntsnsseubiaswacawnsedaias 7 3 APPENDIX A AMPLITUDE UNITS CONVERSION A 1 General EN REOR alas a iene NE een A 1 GLOSSARY e e nA Y WO F2 9 95 996 994994 94 49 o 99bw vuuvvtewteasenerttnotetetvtsitt G I vil Z H 1 1 D AA Q3 DI rh t t U pa Va ra r Vi OQ A CN Ut la No 1 pi EN Feet bet Fe bech 5 tal Lai m M vn 3F 2 3F 3 3F 4 3H 1 3H 2 3J 1 3J 2 3J 3 314 3L 1 3L 2 3N 1 30 1 30 2 30 3 7 1 7 2 viii TABLE OF AC Power Cables Available Out of Lock Messages CONTENTS Continued TABLES OLETTE HEME HERERO ET EET EE TE EET EE ET hte A EEE EY BME RS URETT TE TT ET EEE ET EE EE ET EEE SETE TETT ETE TET EE EE Summary of Special Functions Function to Code REENEN HP IB Capability Reference De LG Relationships Between Keystrokes and HP IB Code SENDENEES sunneste Output Active Function String Formats 26 0 cc cec ssesevcsossecsecasseastscesseriens Output Display Binary Weight of Annunciators eese Error Code and Message Recovery Example Program ess HP IB Status Byte Bit Definitions ENEE ENEE EEN ENNEN Signal Generator Function to HP IB Code aen Signal Generator HP IB Code to Function EN S
132. tion mode press SHIFT AM then OFF ON push buttons MODULATION OSCILLATOR OUTPUT 1 Press SHIFT then INSTR PRESET push button E en Se dis Press MOD FREQ push button and enter desired output frequency from 20Hz to 100KHz Verify MOD FR and entered value is displayed Press SHIFT then MOD FREQ push buttons and enter desired output level from 0 to 3Vpeak Verify entered data is displayed along with cursor and MOD OUT Signal is available for use at MOD connector SIMULTANEOUS MODULATION SOURCE 1 Select Internal External AC as follows e 1 10 Set desired modulation mode AM FM M using internal oscillator as specified in seting MODULATION procedure Connect an external AC coupled signal to the connector of the modulation mode selected in step 1 Set signal level to I Vpeak 5 Set signal frequency to desired rate Press SHIFT then EXT AC push buttons Verify entered data is displayed along with INT EXT and AC annunciators Select Internal External DC as follows Set desired modulation mode AM FM M using internal oscillator as specified in setting MODULATION procedure Connect an external DC coupled signal to the connector of the modulation mode selected in previous step Set signal level to 1 Vpeak 5 Set signal frequency to desired rate Press SHIFT then EXT DC push buttons Verify entered data is displayed along with INT EXT and DC annunciators MODIFYING SETTINGS TUNE KNOB 1 On Si
133. tor TTL positive true for CRT display blanking during retrace External Reference Input 122 5 or 10M Hz 25ppm gt 0 5Vp p 5000 input TOME TEE 10MHz gt 1 4Vp p into 5002 7502 impedance output 0 7 0 11 TECHNICAL CHARACTERISTICS Continued OPERATING POWER REQUIREMENTS Voks uland TR 115 230 VAC gio vassere 50 to 400Hz POWEI DESTO Hasene EN ERN Te 300V A maximum ENVIRONMENTAL REQUIREMENTS Operating Temperature Range 1 11 ecuu ec ee eeaee cese eur erar aspe an aa era eaa g e SE Pasar eu raa 0 to 55 C Operae AISNE sosser eden lt 4570 meters 15 000 feet Operating Humidity vene 5 to 95 at 40 C OVERALL DIMENSIONS AND WEIGHT Height Leka XOT PNE E 5 25 IN 133mm EE 16 75 IN 425mm DEAN Le 23 8IN 617mm bin Aura 71 5LB 32 7kg NET ACCESSORIES FURNISHED Power Cable 115V operation mmmssemrenserasaesvesrsdvensnrnssneanseesrevsene 1 each HPN 8120 1378 Fuse 230V Opera AS 1 each HPN 2110 0002 Fuse TSV Operation 25 ad 1 each HPN 2110 0003 Front FEKS 1 each HPN 5061 9689 SECTION I OPERATING INSTRUCTIONS 1 1 DESCRIPTION AND USE OF OPERATOR S CONTROLS INDICATORS AND CONNECTORS This paragraph describes all of the operator controls and indicators for the Signal Generator Due to the large number of controls and indicators on the front panel it is necessary to separate the panel into five different portions Figure 1 1 views A thru E shows each portion of the front panel The
134. tor ENEE Cable Plug W9P2 Signal Locator Ie A18 Rectifier Filters Module and P O A17 Power Supply Regulators Attenuator Drivers Module Diagnostics P O A17 Power Supply Regulators Attenuator Drivers Module Diagnostics erreneersvenerernsvennnraveranenrtnnneneneevnvannanennsnveneernnnrasenavenn A411 Service Test Points Signal Locator EEN A3j4 Service Test Points Signal Locator eese Connector ALA1J1 Signal Locator EEN IA Al A3 and A4 Control Section Diagnostics essere Cable Plug W14P2 Signal Locator HIA Cable Plug W14P2 Signal Locator esses e A2 Modulation Module Diagnostics essen nennen enne Cable Plug W1P2 Signal Locator eese Cable Plug W1P3 Signal Locator een ASJ1 Signal Locator Solder Side View EE Cable Plug W1P2 Signal Locator eH Cable Plug W1P3 Signal Locator ENEE Page 1 1 1 19 1 22 1 26 1 74 1 85 2 2 2 4 2 6 2 9 2 11 2 13 2 15 2 17 2 19 2 21 2 22 2 24 3 7 3 15 3 26 3 27 3 32 3 41 3 43 3 49 3N 100 30 100 4 100 5 100 TABLE OF CONTENTS Continued FIGURES Continued Page A511 Signal Locator Solder Side View eese eee 3 132 A6 FM Loop Counter Timebase Module Diagnostics mereroorrnorrnronnnnenn 3 139 Cable Plug W2P2 SINA LOCATOR se S 3 155 A572 Signal Locator Solder Side View eese eene 3 158 Cable Plug W2P2 Signal Locator eege eeschtes badene bade cass
135. ts and still cannot obtain the requested setting that setting is probably not possible When setting one or more of the following use the appropriate flowchart Exceptions to Flowcharts Not covered in those flowcharts is frequency sweep s dependence on entry sequence Frequency sweeps are coupled to FM and M settings When selecting either Digitally Stepped Frequency Sweep or Phase Continuous Frequency Sweep with either FM or M use the following sequence 1 Tum off frequency sweep FAOF FBOF 2 Select either Special Function 123 Phase Continuous Frequency Sweep or Special Function 223 Phase Continuous Frequency Sweep Off which enables the selection of Digitally Stepped Frequency Sweep 3 IF FM is to be selected use the FM flow chart but don t set FM yet nor FR 4 If M is to be selected use the M flowchart but don t set PM yet nor FR 5 With Start Frequency FA or Stop Frequency FB active select the sweep mode FASA for auto FASM for manual or FASG for single 6 Select the sweep time setting 7 Select either the start or stop frequency setting Choose the frequency setting that is in the band that allows the desired FM or M setting 8 Select the desired FM or M deviation setting 9 Select either the stop or start frequency setting whichever of these that was not set in step 7 1 73 When setting one or more of the following use the appropriate flowchart FM FMOF FR FM Source
136. uals the maximum of 0 1 dB or Start Amplitude in dBm Stop Amplitude in dBm 5 The minimum step size is equal to 0 1 dB If the desired step size is equal to the minimum use a sweep time setting in msec equal to or greater than the result of the following equation Start Amplitude in dBm Stop Amplitude in dBmlV 1 x 3 ms Step Size in dB If the desired step size is greater than the minimum use a sweep time setting in msec equal to or greater than the result of the above equation but less than the following equation Start Amplitude in dBm Stop Amplitude in dBm en Ph 91x pg Step Size in dB 1 14 RECALLING INSTRUMENT SETTINGS NOTE The DN 00 message shows the current register number and UP 01 message shows the next register number UP 01 SAVE 1 Press SAVE push button and Enter desired register from 00 to 50 for specific register Press STEP UP push button to save in next available register e Press STEP DOWN push button to save in most recently accessed register RECALL l Press RECALL push button and e Enter desired register from 00 to 50 for specific register Press STEP UP push button to recall instrument state stored in next available register Press STEP DOWN push button to recall most recently accessed register SEQUENCE SETSEQUENCE 1 Press SHIFT then SEQ push buttons and enter the starting and ending registers 2 Press SEQ push button to reca
137. using external source modulation deviation setting sets the input sensitivity per volt and not actual deviation Any voltage change on the FM M input connector will change M deviation Verify entered data is displayed along with cursor M EXT and AC DC annunciator NOTE M can be used simultaneously with AM or Pulse Modulation Combinations of internal and external modulation are possible using INT function To deactivate M mode press SHIFT FM then OFF ON push buttons 1 49 MODULATION Continued 4 Set Puise modulation as follows Press SHIFT then INSTR PRESET push button If internal modulation oscillator is used Press SHIFT AM then INT push button Press MOD FREQ push button and enter desired modulation frequency from 10Hz to 50KHz Press SHIFT AM then OFF ON push buttons Verify entered data is displayed along with cursor PULSE and INT annunciator If external modulation signal is used Press SHIFT AM then EXT DC push buttons Connect 20 volt external input to Pulse connector trigger voltage is 1 5V Do not apply more than 20 volts to the Pulse input connector Adjust external input frequency from DC to 50KHz for desired modulation rate Press SHIFT AM then OFF ON push buttons Verify entered data is displayed along with cursor PULSE EXT and DC annunciators NOTE Pulse modulation can be used simultaneously with FM or M Phase Modulation To deactivate Pulse Modula
138. utton rad 95 push button RECALL push button SAVE push button BACK SP push button FUNCTION Used to internally store entries from numeric push buttons Frequency functions are assigned kHz Amplitude functions are assigned millivolts Time functions are assigned milliseconds Push for on Used to internally store entries from numeric push buttons Frequency functions are assigned Hz Amplitude functions are assigned microvolts Push for on Used to internally store entries from numeric push buttons M Phase modulation is assigned radians AM depth is assigned percent Amplitude functions are assigned dbu V Push for on Used to recall a previously stored Signal Generator operational setup When selected front panel settings change to recalled settings Push RECALL and register number 00 thru 50 to recall a stored setup Used to store a Signal Generator operational setup All front panel controls and indicators except Messages HP IB Address Local Remote Mode Sequential settings and Special functions can be stored Push SAVE and register number 00 thru 50 or STEP push buttons to store a setup Clears one digit at a time starting with least significant digit and is used only during data entry and before any terminator push button is pressed 34A 35A CONTROL INDICATOR OR CONNECTOR gt push buttons HOLD INCR FUNCTION Used to select desired digit to be modified by po
139. w command from the controller Typically this is an initialization command used to place the bus in a known starting condition The Signal Generator stops talking or listening when it receives the Abort message Trigger The Signal Generator does not respond to the Trigger message Status Bit The Signal Generator does not implement parallel poll operations and therefore cannot send a Status Bit message Controller Capabilities Self Test and Calibration The Signal Generator can be configured as a system controller to perform various self test and self calibration routines with a system voltmeter and the HP 8902A Measuring Receiver and an optional printer Display Control Via HP IB Selecting the SHIFT key twice when in the local mode will display the instrument settings last selected In the remote mode you can send SHSH to achieve this same effect This may be useful when outputting display information Remote Indicators The Signal Generator displays HP IB annunciators to indicate its current HP IB status RMT When remote operation is selected LSTN When addressed to listen TLK When addressed to talk SRQ When pulling the SRQ line with the RQS bit set in the Status Byte Disabling the Listen Addressed State The Signal Generator remains addressed to listen until It is addressed to talk It receives an abort message It receives a universal unlisten command or Until the Power is switched from Standby to On Disabling th
140. wards completion of the task or function selection you begin Out of lock messages might appear as queued up messages during operation These messages will be disabled if Special Function 119 Disable Settling is selected If any of these messages occur the instrument might not be functioning properly and need to be serviced However some of the messages might be displayed because you have exceeded the instrument s limits The out of lock messages are listed in the Table 1 2 The solution column provides the number s of the solution s listed below that might eliminate the out of lock condition IF THE PRESCRIBED SOLUTION DOES NOT ELIMINATE THE MESSAGE THE INSTRUMENT SHOULD BE SERVICED Also these messages can be output using OH Writing Messages The messages listed message code is prefixed with V might occur when you are accessing the special functions When using the instrument locally you will usually be able to view each message whenever it occurs When using the instrument via HP IB you can access some messages using the OE or OH commands Messages accessed this way can be output in the form of a message code number or an actual alphanumeric message string In the following message listing the message code number that can be output over HP IB is provided to the far right of the message If no message code number is provided then that message can only be read over HP IB using Output Display unless otherwise stated
141. y was selected and the display of the instrument settings is disabled Special Function 235 Re enable Display re enables the display of instrument settings PHASE STEP DOWN 1 DEG 122 PHASE STEP UP 1 DEG 123 The RF signal s output phase was stepped down by 1 degree The RF signal s output phase was stepped up by 1 degree These messages are activated with Special Function 250 SPCL FUNC VERIFY OFF 124 Special Function 111 Special Function Verify Off was selected and the automatic Special Function verification is disabled A special function description will not be displayed automatically whenever a special function is selected The display of special function descriptions can be re enabled with Special Function 211 ENTERING SERVICE MODE 125 Entering the Service Mode Special Function 3 was just selected Either refer to Section I Remote Operation information about writing messages to the display Select any function to exit this mode 1 41 SYS CONTROL DISABLED 131 HP IB system control capabilities were just disabled The HP IB address was just set which disables the Signal Generator s system control capabilities accessed with Special Function 3 ADRS LISTEN ONLY i 132 The instrument is configured as a listen only device over HP IB LISTEN ONLY DISABLED 133 The instrument is no longer configured as a listen only device The instrument s HP IB address setting was changed from 31 to a value between 00 and 30 WAIT FOR
142. y to an Output Parameters Changed OC message if you send OC instead of OE Sending either OE or OC alone program line 10 above will reset the appropriate status bit unless RQS is true in which case the Status Byte must be read again to clear the status bit Note that you should not execute an instrument function between setting up the instrument for data output and reading the data from the Signal Generator To illustrate this consideration refer to the OE example above If you were to insert a line 15 that set an instrument function such as AM the data received from the Signal Generator will be the display data not the Execution Error message code because AM would have superceded the OE data output preparation Hardware Errors Hardware Error messages are handled differently than Execution Error or Parameters Changed messages since more than one message can be present These messages are Stored as a queued up list with a maximum number of 22 messages To properly retrieve all the queued up messages follow the OH command with a software loop as shown in the sample program in Table 1 8 Output ctive Function O Output Active Function enables the Signal Generator to output the setting of a selected active function over HP IB The Signal Generator outputs a string that can be directly read into a numeric variable or into a string variable which includes the HP IB codes for both the function and its units specifier maximum
143. y to settle improving response time by up to 40 ms When using this special function it s possible to select a function before the previous function has finished settling Also Special Function 119 disables out of lock messages Sweep Up and Down On Sweep Up and Down is a type of sweep that causes the Signal Generator to sweep from the start end point to the stop end point and then from the stop end point to the start end point in the same amount of time during auto or single sweep modes Linear Amplitude Sweep This special function selects a linearly stepped output rather than the usual logarithmically stepped output Use a sweep time greater than 900ms to obtain maximum sweep resolution Phase Continuous Frequency Sweep Phase Continuous Frequency Sweep enables the Signal Generator to frequency sweep between two end points in a linear phase continuous manner Turn Off LCD Lighting This special function tums off the LCD back lighting in the display Disable Display Special Function 135 causes the Signal Generator to execute commands without displaying the instrument state useful in secure environments Disable ALC Off This special function re enables the output leveling loop that was disabled with Special Function 4 External Low Rate FM Off This special function turns off the FM modulation source selected with Special Function 5 When Special Function 5 is turned off in this way the Signal Generator selects external ac

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