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HP / Agilent 8647A Op & Service Manual

1. AC Mains line Fuse Removal To Remove the Fuse Modulation Testpoints and Power Supply LEDs Power Supply Distribution DADO D O ra ra w GO CO CO CO CO CO Ww 1 1 wwhd y do do Co ADS dd PLLA LP PP D BE ER EP 5c Service Error Messages Replaceable Parts Introduction s ira mu ce E a ERAS Assembly Replacements Adjustments Internal Timebase Adjustment Recommended Equipment or equivalent Procedure su dns Se ae ae ak ah ee ns Performance Tests Calibration Cycle Required Test Equipment FM Accuracy Performance Test FM Distortion Performance Test AM Accuracy Performance Test AM Distortion Performance Test Phase Modulation Accuracy Performance Test Phase Modulation Distortion Performance Test Residual FM Performance Test Harmonics Performance Test Spurious Performance Test DC FM Frequency Error Performance Test RF Level Accuracy Performance Test CW Frequency Accuracy Performance Test Option 1E5 Only 3 066 he certo Ge QUE ne a ee A 4 Test Record 1 poal ea Index 8 14 8 15 8 16 8 17 8 18 8 19 Contents 5 Figu
2. 2 4 Programming RF Frequency and FM Modulation 2 4 Querying RF Frequency 2 2 5 Programming RF Amplitude 2 2 5 HP IB Status Reporting 2 8 External Modulation Input Level Status 2 9 Example Check the Condition of Modulation Input High orLow 8 2 2 9 Example Generate a Service Request for External Modulation Input High or Low 2 10 Reverse Power Protection Status 2 11 Example Check the condition of the RPP 2 11 Unspecified Power Amplitude Entry Status 2 11 Example Check the Condition of Unspecified Power ENY 2 Minas E acao el E Ba ie a 2 12 HP 8647A SCPI Command Reference 2 13 AM Subsystem 2 14 CAL Subsystem 2 2 14 FM Subsystem 2 15 FREQuency Subsystem 2 16 OUTPut Subsystem 2 16 PM Subsystem 2 17 POWer Subsystem 2 18 STATUS Subsystem 2 19 SYSTem Subsystem 2 20 HP IB Capabilities 2 21 HP IB Connector Information 2 22 Contents 3 Contents 4 5a 5b Installation Unpacking Your Signal Generator Connecting AC Power Power Requirements Replacing the Fuse Turning On
3. 1b 20 Operation Reference 3 AUXILIARY INTERFACE 4 Line Voltage Connector 5 HP IB Connector 6 TIMEBASE ADJUST and Help Switches Rear Panel Operation Connect the HP 83300A Remote Interface or the HP 83301A Memory Interface to this connector for operation with the instrument Refer to Remote Interface and Memory Interface in this section for information about operating these devices TX Data output 5 Volts RX Data input ee th ack CTS input RTS output icnecter drw For information about the line voltage connector or fuse replacement refer to Chapter 3 Installation This is an IEEE 488 1 1987 connector for controlling the instrument via an external controller For information about HP IB operation of the instrument refer to Chapter 2 HP IB Programming Position one of this switch labeled TIMEBASE ADJUST places the instrument in the timebase adjustment mode For the timebase adjustment procedure refer to Chapter 7 Adjustments Position two of this switch labeled NOT USED is the switch which allows you to turn off the following error messages 001 No external dc coupling for PM 002 Modulation exceeds deviation range 004 Invalid units selection 005 Increment value entry out of range 006 End of increment range 007 Entered value out of range 008 Amplitude exceeds specified range 010 End of knob range 011 Amplitude exceeds ATTN HOLD limits 012
4. FM DEV FM STAT ON FM STAT FM STAT OFF FM SOUR INT FM SOUR EXT FM SOUR INT EXT FM INT FREQ 1 KHZ FM INT FREQ 400 HZ FM EXT COUP DC FM EXT COUP AC FM SOUR FM INT FREQ FM EXT COUP 2 6 HP IB Programming Table 2 1 Programming Command Statements and Descriptions continued Command Statement Description Modulation continued Phase Modulation PM DEV lt value gt RAD Set phase modulation in radians RAD lt value gt from PM DEV 0 00 to 9 99 and 10 0 Sets PM on AM and FM must have state off Sets PM off Selects internal source for PM Selects external source for PM Selects internal and external source Selects internal 1 kHz frequency Selects internal 400 Hz frequency PM EXT COUP DC Selects external dc coupling for PM PM EXT COUP AC Selects external ac coupling for PM Standard Commands for Status See HP IB Status Reporting examples PIC eee ne PM STAT ON PM STAT OFF PM SOUR INT PM SOUR EXT PM SOUR INT EXT PM INT FREQ 1 KHZ PM INT FREQ 400 HZ PM INT FREQ PM EXT COUP Returns contents of the power condition register STAT QUES POW ENAB lt NR1 gt Enables lt NR1 gt event registers for power Returns contents of enabled event registers for power Returns contents of the modulation condition register STAT QUES POW COND STAT QUES POW EVEN STAT QUES MOD COND Enables lt NR1 gt event registers for modulation Returns contents of ena
5. Specifications Information SST Warranty This Hewlett Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard 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 Hewlett Packard Buyer shall prepay shipping charges to Hewlett Packard and Hewlett Packard shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Hewlett Packard from another country Hewlett Packard warrants that its software and firmware designated by Hewlett Packard for use with an instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HEWLETT PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED
6. To avoid hazardous electrical shock do not connect AC power to the instrument when there are any signs of shipping damage to any portion of the outer enclosure cover and panels Ventilation Requirements When installing the instrument in a cabinet the convection into and out of the instrument must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature of the instrument by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used ee Connecting AC Power Warning This is a Safety Class I product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside the instrument is likely to make the instrument dangerous Intentional interruption is prohibited If this instrument is to be energized via an external autotransformer for voltage reduction make sure that its common terminal is connected to a neutral earthed pole of the power supply This instrument is equipped with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds Installation 3 1 3 2 Power Requirements Caution Replacing the Fuse Installation the instrument
7. a e Al ee A 1b 6 Semi 42 duos A ian Babe ty AGE 1b 6 AE EE loo 1b 6 Instrument Preset 1b 7 POWER E emas MeN oo CALDO Brauer Gui 1b 7 POWER DEL ua pasado EB son 1b 7 HPB s een ta eh ne A St 1b 9 ECADRS eos ya tn he co eh ass ges ea RPS 1b 9 2 LOCAL costs ee oe BS de red we a 1b 9 MEMORY ses os Bras cen ie que ae Mig 1b 10 D SAV Rok oe A A BE AR OE 5 1b 11 23 REGS giv acs whe a Sea Ge LATE She ME UE 1b 12 3 Register Recall Arrows 1b 12 AS SQ oara a ME ERE A te oe Soe BONE MS ae ete ve 1b 13 Ber DE AC a ee AE eke TE Glee eae 1b 14 Renumbering the Registers 1b 14 Modulation Source 1b 15 Y MOD ON OF E sd ds bE GOR OR le ge 4 1b 16 2 INT 400 Hz INT 1 kHZ 1b 16 3 EXT AC EXT DC 1b 16 4 1 kHz EXT DC 1b 17 Setting the Modulation Level 1b 17 5 MOD INPUT OUTPUT 1b 17 RE QUIPUT seo ad Vaio N 1b 18 1 RECON OFE ais Seb Bech shel in dos oA 1b 18 2 ATTN HOLD sha RR la a ea hu ace 1b 18 Vernier Ranges 1b 18 8 RFOUTPUT 1b 19 Rear Panel us ca go Gea ok fi ee ete SRD Wie a 1b 20 1 10 MHz REF INPUT and OUTPUT 1b 20 2 DISPLAY CONTRAST 1b 20 3 AUXILIARY INTERFACE 1b 21 4 Line Voltage Connector 1b
8. 10 dBm with over range to 13 dBm When making amplitude changes the instrument does not turn off the RF output The electronic attenuator provides rapid amplitude changes The period of any over or under ranging that may occur during level transitions is typically less than 30 ms Press to set the peak deviation for frequency modulation Then use the data entry keys to enter the desired value of deviation The values allowed depend on the RF frequency selected See Chapter 4 Specifications for peak deviation specifications Press to set the amplitude modulation range Then use the data entry keys to set the desired value of range Values from 0 through 100 are allowed Press GM to set the peak deviation for phase modulation Then use the data entry keys to enter the desired value of deviation The values allowed depend on the RF frequency selected See Chapter 4 Specifications for peak deviation specifications Increment Set INCREMENT SET 1 INCR SET Note Note incrkeys drw Press to view or change the increment set value for the currently active function the active function is the last function key you press FREQUENCY AMPLITUDE EM AM or EM When you press NCR SET is displayed between the value and the units The indicates that the displayed value is the increment set value An increment value cannot be set for the knobs or the memory recall arrow keys Increment
9. 221 87 Gray New Z dionds Mainland China 250V 8120 1689 Straight CEE7 Y11 201 79 Mint Gray East and West 8120 1692 90 201 79 Mint Groy Europe Central O African Republic United Arab Republic q unpolarized in many nations 125V 8120 1348 Straight NEMAS 15P 203 80 Black United States 8120 1538 90 203 80 Black Canoda Japan 100 V or 8120 1378 Straight NEMAS 15P 203 80 Jade Groy 200 V Brazil 8120 4753 Straight 230 90 Jade Groy nn ol 8120 1521 90 203 80 Jade Gray Saudia Arabia 8120 4754 90 230 90 Jade Gray Taiwan 250V 8120 5182 Straignt NEMAS 15P 200 78 Jade Gray Israel Gs 8120 5181 90 200 78 Jade Gray x Part number for plug is industry identifier for plug only Number shown for cable is HP Part Number for complete cable including plug x E Earth Ground L Line N Neutral FORMAT 80 Figure 3 2 Power Cable and Mains Plug 34 Installation Turning On the Signal Generator Caution If you are operating this instrument in extreme environmental conditions refer to the following operation limitations The following minimum conditions are required for safe operation of this instrument m Indoor use a Altitude lt 4572 meters 15 000 feet a Temperature 0 to 50 C unless specified differently Maximum relative humidity 80 for temperatures up to 31 C decreasing linearly to 50 relative humidity at 40 C The instrument per
10. Aging rate temperature effects line voltage effects dependent After one hour warm up and within one year of calibration High Stability Timebase Opt 1E5 Aging lt 12 ppm year lt 0 5 ppm year Temperature lt 1 ppm lt 0 05 ppm Line Voltaget lt 0 5 ppm lt 0 1 ppm The aging rate is lt 1 ppm in the first year t Specification applies for a line voltage change of 15 10 MHz typically gt 0 5 Vrms level into 50 ohms External reference oscillator input Accepts 2 5 10 MHz 5 ppm and a level range of 0 5 V to 2 Vrms into 50 ohms 4 2 Specifications Output 10 to 136 dBm Display Resolution 0 1 dB Accuracy 1 5 dB Accuracy is valid from maximum specified output power to 127 dBm It s typically 3 0 dB below 127 dBm Reverse power protection 50 watts into 50 ohms to S SWR output lt 6 dBm typical 1 Output Impedance Nominally 50 ohms Spectral Purity Harmonics lt 30 dBc output lt 4 dBm Subharmonics output lt 4 dBm 60 dBc Nonharmonics gt 5 kHz offset lt 4 dBm output level lt 60 dBc Non harmonic spurious are 55 dBc from 220 to 250 MHz Residual FM CCITT rms lt 249 MHz lt 20 Hz typically lt 11 Hz lt 501 MHz lt 10 Hz typically lt 6 Hz lt 1000 MHz lt 20 Hz typically lt 11 He SSB Phase Noise at 20 kHz offset typical at f 500 MHz lt 110 dBc Hz at fc 1000 MHz lt 106 dBc Hz Spe
11. Cause What To Do 510 Description Cause What To Do 511 Description Cause What To Do Timebase cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A4 assembly The calibration ROM is contained in the module If the failure is still present after replacing the A4 assembly replace the A3 assembly which contains the RAM Temperature cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in restoring data from the calibration ROM The calibration ROM can be verified by replacing the A7 assembly The calibration ROM is contained in the module If the failure is still present after replacing the A7 assembly replace the A3 assembly which contains the RAM TC coeff s cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A7 assembly The calibratio
12. Decreasing the Register Number 1 Delete register 02 The settings saved in register 02 are recalled when it is deleted 12 00000 MHz SEQ 0 REG 2 Save the settings from register 02 into register 01 FREQUENCY ES MODULATION SSSR AMPLITUDE 12 00000 MHz SEQ 0 REG 01 1 nemswq2 drw O 2000 0000 000000 0000 oppo E Operation Examples 1a 13 Checking the Sequence 3 Step through the register sequence 12 00000 MHz SEQ 0 REG 01 10 00000 MHz SEQ 0 REG 00 numseq3 drw Note In this example you renumbered one register When you need to renumber two or more registers use instead of to recall each register until you get to the last register in the sequence then use DEL 1a 14 Operation Examples Inserting a Register in In this example you will insert a register into the sequence you a Sequence Created in the previous example The process involves incrementing each register number that comes after the point in the sequence where you wish to insert a register 1 Recall the last register in sequence 0 12 00000 MHz SEQ 0 REG 01 insseqi drw FREQUENCY gama MODULATION MN AMPLITUDE 12 00000 MHz SEQ 0 REG 02 insseq2 drw 3 Recall register 00 Register 01 can now be used to save the settings that are saved in register 00 10 00000 MHz SEQ 0 REG 00 rss o insseq3 drw Operation Examples 1a 15 4 Save the recalled settings into
13. For the majority of applications remotely programming the signal generator requires only basic programming knowledge and the command statements listed later in this chapter Developing programs for querying the instrument s status is considered to be an advanced application see HP IB Status Reporting For more information on HP IB programming see the Tutorial Description of the Hewlett Packard Interface Bus HP Part number 5952 0156 HP IB Programming 2 3 a gt gt Tk k gt gt 00 00 0202 A Programming Examples are provided here to help you understand the required Examples programming structure All examples use the HP BASIC programming language See Table 2 1 for a complete listing of commands Note Command statements may be concatenated on the same line if separated by a semicolon A colon must precede successive command statements to ensure command hierarchy Programming RF OUTPUT 719 FREG CH 306 MHz Frequency OUTPUT The output statement HP BASIC tells the system controller to output what follows 7 The Input Output select code of the system controller is 7 19 The HP IB address of the signal generator is 19 Semicolon A semicolon separates the HP BASIC command from the output string that follows Quotes All command statements must be contained in quotes FREQ CW This command programs the RF frequency FREQ must be in the statement first repr
14. POW REF STAT ON POW REF STAT POW REF STAT OFF Frequency FREQ CW lt value gt lt units gt Sets the RF frequency to the lt value gt and lt units gt FREQ CW lt value gt may be up to 9 digits with a maximum of 10 Hz resolution lt units gt may be MHZ KHZ or HZ Modulation Amplitude Modulation AM DEPT lt value gt PCT AM STAT ON AM STAT OFF AM SOUR INT AM SOUR EXT AM SOUR INT EXT AM INT FREQ 1 KHZ AM INT FREQ 400 HZ AM EXT COUP DC AM EXT COUP AC Frequency Modulation CAL DCFM FM DEV lt value gt KHZ Sets AM depth in lt value gt from 1 to 99 9 Sets AM on FM and PM must have state off Sets AM off Selects internal source Selects external source Selects internal and external sources Selects internal 1 kHz frequency AM INT FREQ Selects internal 400 Hz frequency AM cannot be dc coupled SCPI allows command Selects external ac coupling for AM AM EXT COUP Eliminates dc FM offset Sets FM deviation in kHz lt value gt from 0 00 to 9 99 and 10 0 to 99 9 lt value gt may also be entered in Hz HZ Sets FM on AM and PM must have state off Sets FM off Selects internal source for FM Selects external source for FM Selects internal and external source Selects internal 1 kHz frequency Selects internal 400 Hz frequency Selects external dc coupling for FM Selects external ac coupling for FM
15. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HEWLETT PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY C O TT 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 Refer to the list of Sales and Service Offices on the following page Hewlett Packard Sales and Service Offices US FIELD OPERATIONS HEADQUARTERS Hewlett Packard Company 19320 Pruneridge Avenue Cupertino CA 95014 USA 800 752 0900 California Hewlett Packard Co 1421 South Manhattan Ave Fullerton CA 92631 714 999 6700 Hewlett Packard Co 301 E Evelyn Mountain View CA 94041 415 694 2000 Colorado Hewlett Packard Co 24 Inverness Place East Englewood CO 80112 303 649 5000 Georgia Hewlett Packard Co 2000 South Park Place Atlanta GA 30339 404 955 1500 Illinois Hewlett Packard Co 5201 Tollview Drive Roling Meadows IL 60008 708 255 9800 New Jersey Hewlett Packard Co 150 Green Pond Road Rockaway NJ 07866 201 627 6400 Texas Hewlett Packard Co 930 E Campbell Rd Richardson TX 75081 214 231 6101 EUROPEAN OPERATIONS HEADQUARTE
16. or J to select the next or previous sequence of registers The sequences are selected in numeric order The number of the selected sequence appears in the second line of the FREQUENCY display When a sequence is selected the first register in the sequence is recalled When a sequence is selected that has no registers saved in it two dashes will appear in the REG field Press 1 or to recall the operating settings saved in the registers in the currently selected sequence The number of the last register accessed appears in the REG field If two dashes appear in the REG field a sequence that has no registers saved in it has been selected After the last register in the sequence has been recalled the register count will begin again at the first register saved in the sequence Refer to MEMORY in this section for further information about register sequences Operation Reference 1b 23 Memory Interface Memory Interface Accessory 1 POWER 1b 24 Operation Reference HEWLETT 83301A PAR PACKARD MEMORY INTERFACE RON 00009000000000000000000000 000000000000 DOOTODOOOOOOS SS SC FOO OOOO 00000000000 COPY re 200200000000 ORO ARRRARRARARRARARRANARAAS C000000000000 SALERRO LALA ALLO TO COCO RADO INSTRUMENT HP 83301A AUXILLARY INTERFACE memory drw This light indicates that power is being supplied to the HP 833014 It
17. pdctover drw Press to power up the instrument The instrument powers up to the same state it was in when power was turned off except that the RF output will be turned off press the key to turn it on Display contrast is an adjustment that is located on the rear panel It allows you to adjust contrast for the front panel display Turn the adjustment to optimize the display for viewing it from above below or straight on If the display is blank first attempt to adjust the display contrast adjustment before returning the instrument for service The keys in the FUNCTION and DATA blocks allow you to enter values for setting the frequency amplitude and modulation level of the RF output signal When you press a FUNCTION key that function becomes the active function Press to view or change the increment value for the active function Press the fp or key at any time to change the active function setting by the increment value The knobs are always active when the instrument is in local front panel control Turn them to increase or decrease the frequency or amplitude of the RF output Press or next to each knob to adjust the knob s resolution Press REF SET next to each knob to set the displayed value as the reference value and turn on the reference mode Press to turn on and off the reference mode without changing the reference value When the reference mode is on the displayed value indicates the offset betw
18. 11 Residual FM Performance Test Residual FM Performance Test Connect the Test Equipment Audio Analyzer KA eR Co Cie fa O HIGH ES Ed ES E TODO O O O OSENSOR o 0004 INPUT 50 2 EE DE Measuring Receiver O ptest2 drw HP 8647A under test Figure 8 7 Residual FM Equipment Setup Configure the 1 Measuring Receiver 9 3 4 5 Configure the Audio 1 Analyzer 9 3 4 8 12 Performance Tests Reset FM mode Peak detector 50 Hz high pass filter 15 kHz low pass filter AC level mode CCITT weighting filter 30 kHz low pass filter Set low input to ground Configure the HP 8647A Measure Deviations Note Residual FM Performance Test 1 Turn modulation off press MOD ON OFF 2 Set the amplitude press 4 EM 3 Turn the RF output on press RE_ON OFF 1 Enter the frequencies shown in the test record 2 Record the test results and compare the results to the limits in the test record The voltage displayed by the audio analyzer can be read as Hz For example 10 mV equals 10 Hz Performance Tests 8 13 Harmonics Performance Test Harmonics Performance Test Connect the Test Equipment ptest3 drw HP 8647A under test Spectrum Analyzer Figure 8 8 Harmonics Equipment Setup Configure the 1 Frequency span 500 kHz Spectrum Analyzer 9 Res BW 10 kHz 3 Video BW 30 kHz Configure the HP 1
19. 4 SEQ Note Press and a sequence number 0 through 9 to select a register sequence When you select a sequence the number of the sequence appears in the display along with the number of the first register saved in the sequence The instrument is set to the operating settings saved in the first register If no registers have been saved in the sequence a message is displayed to let you know Selecting the sequence you are currently in is a quick way to return to the beginning of the sequence A sequence can include up to 100 registers 00 through 99 There are a total of 300 registers available in the instrument Registers are automatically assigned to the currently selected sequence when they are saved The registers saved in any given sequence are independent from the registers in any other sequence This allows you to create up to 10 different register sequences Consequently it is possible to have up to ten registers with the same number for example REG 01 each assigned to a different sequence and each with different operating settings saved in it Operation Reference 1b 13 Memory 5 DEL Note 1b 14 Operation Reference Press and a register number 00 through 99 to delete that register The specified register is deleted from the currently selected sequence only registers in other sequences you have set up are not affected After you have deleted a register you will not be able to recall that register number unti
20. 5a 3 reference 5a 4 RPG 5a 2 sig gen synth 5a 4 synthesizer 5a 4 timebase 1b 20 adjustment 6 3 TIMEBASE ADJUST 1b 21 units conversion 1b 6 vernier 1b 18 Index 7
21. Ampl U taint ES e 8 36 Performance Tests Test Record Table 8 13 RF Level Accuracy Performance Test ee Limits Limits dBm va a Performance Tests 8 37 Test Record Table 8 13 RF Level Accuracy Performance Test a Limits Limits dBm Freq Ampl Uncertaint pe ca 115 9 117 4 125 9 127 4 8 38 Performance Tests Test Record Table 8 14 CW Frequency Accuracy Performance Test a 1E5 Only Uncertainty Limits Limits MH Ampl le Performance Tests 8 39 Index Al theory of operation 5a 2 A2 theory of operation 5a 3 troubleshooting 5b 1 A3 theory of operation 5a 3 A4 theory of operation 5a 4 A5 theory of operation 5a 4 A6 Part number 6 3 theory of operation 5a 4 A7 Part number 6 3 theory of operation 5a 5 ac power connection 3 1 adjustments 6 3 ADRS 1b 9 altitude 3 5 AM 1b 4 amplitude la 2 RF OFF 1b 18 amplitude 1b 4 attenuator 1b 18 part number 6 2 6 3 theory of operation 5a 5 ATTN HOLD 1b 18 audio source 1b 16 auxiliary interface 1b 21 backspace 1b 6 book conventions viii busy 1b 25 Index 1 Index 2 calibration cycle 8 1 carton 3 6 command statements and descriptions HP IB 2 7 programming 2 6 status reporting 2 7 connection ac power 3 1 to other instruments 3 5 container 3 6 contrast 1b 20 controller theory of operation 5a 3 conventions viii copy 1b 25 damage 3 1 delet
22. Housing Troubleshooting Information 5b 3 Modulation Testpoints and Power Supply LEDs DS 304 5 V S 305 5 V F1 DS 301 38 V DS 302 12 V Location Diagram 5b 4 Troubleshooting Information Power Supply Distribution ZZ 7 ZA f A 7 Y A A E AS ULL LLL psbdi drw Note Z Gi Za A L Gi ZA p 2 Cho 4 pl A i Za i i 7 uk p alate p g VA 7 ite p Y 2 Qi f 0 ZA i 2 O p 0 Bi gt E f AL Z l 2 Zi A ZG 2 ZA fa f 2 2 2 Z Z iG WG au WILLE LLL laine LLII LT LL ME PII IS LIS SSIS IS LLL LLI M LILLI LTIIIII EM M MI III LLITS ILLL SSIS LS ILS LILLA 38 v 5 VFI Sds SRR RRR prenda 0000 BESSSe 0588 PE AR 16 LLL LLL hihi rr W4 to ASJ6 Only power supply related di da P O A2 Power Supply signal ground 15v 38v 15v 5 VD Bottom View with Motherboard Cover Removed Troubleshooting Information 7 SSIS KKKKK N INS AA 5b 5 Service Error Messages 5c This chapter describes service error messages Front panel and HP IB operation messages are covered in Chapter 1c Operation Messages 502 Description Cause What To Do 503 Description What To Do 504 Description Cause What To Do 505 Description Cause What
23. No external dc coupling for AM 013 AM unspecified above 4 dBm 014 AM unspecified at or below 1 5 MHz For more information about these messages refer to Chapter lc Operation Messages Operation Reference 1b 21 Remote Interface Remote Interface Accessory EK HEWLETT 83300A PR PACKARD REMOTE INTERFACE p SEQ IN REG JL a O UNE E 3 1 MOD ON OFF AUXILLARY INTERFACE LEG RR 9990000000000 o 00000000000000 EIEII IIN SORA R EL SEP OOPS OO EGER IS dd SEO oco oso ooo sos O dd Eee 90000000000000 EEES pO000000000000 RRA 2999 3 7 RS remote drw Press to turn on or off all modulation internal and external to the RF carrier When modulation is turned off the LED above the key is off and OFF appears in the second line of the instrument s MODULATION display This key also turns on or off the audio output at the MOD INPUT OUTPUT port when an internal source 400 Hz or INT 1 kHz is selected 2 RF ON OFF Press to turn the RF output signal on or off When the RF output signal is turned off the LED above the key is off and RF OFF appears in the second line of the instrument s AMPLITUDE display There is approximately 170 dB of carrier isolation when the output is off 1b 22 Operation Reference 3 Sequence Selection Arrows 4 Register Recall Arrows Remote Interface Press
24. Operation Reference This chapter describes each of the instrument s functions including all of the front panel keys the rear panel connectors and the optional remote interface and memory interface This information is presented in the same functional groups as the front panel key functional groupings Operation Reference 1b 1 Frequency Amplitude Frequency and Amplitude 1 2 3 4 freqkeys drw The knob and reference set keys work similarly for both frequency and amplitude 1 Knob Turn the knobs to increment or decrement the frequency and amplitude settings The knobs are always active when the instrument is in local operation 2 Digit Select Arrow Press these digit select arrow keys to select the digit to be Keys changed with the knob Note The knobs increment the selected digit only For information about incrementing by an arbitrary value using the increment set Keys see Increment Set in this chapter 1b 2 Operation Reference 3 REF SET 4 REF ON OFF Output Power Trouble Frequency Amplitude Press to turn on the reference mode and to set the current RF output setting as the reference value The reference value is stored in non volatile memory until you replace it by pressing REF SET again When you press REF SET the A symbol is displayed between the value and the units When A appears the displayed value indicates the offset between the reference value and the RF output sign
25. Turn the RF output on press RF_ON OFF 8647A 2 Turn the modulation off press MOD ON OFF Measure Harmonic 1 Measure the level of the 2nd 3rd and 1 2 harmonics shown in the Levels test record 2 Convert the harmonic level to decibels below the fundamental dBc and compare the results to the corresponding limits 8 14 Performance Tests Spurious Performance Test e aa Spurious Performance Test Connect the Test Equipment HP 8647A under test Figure 8 9 Spurious Equipment Setup Configure the 1 Frequency span 500 kHz Spectrum Analyzer 9 Res BW 1 kHz 3 Video BW 1 kHz Configure the HP 1 Turn the RF output on press RE ON OFF 8647A 2 Tum modulation off press MOD ON OFF Measure Spurious 1 Measure the levels of the spurious signals shown in the test record Levels 2 Convert the measured levels to decibels below the fundamental dBc and compare the results to the corresponding limits Performance Tests 8 15 DC FM Frequency Error Performance Test OO CL roer rr DC FM Frequency Error Performance Test Connect the Test Equipment HP 8647A under test RF OUTPUT ptesti drw Measuring Receiver Figure 8 10 DC FM Frequency Error Equipment Setup Configure the 1 Reset 3 Special function 7 1 Press 7 Q 1 GPCL Configure the HP 1 Set the amplitude press 4 GEM 8647A 2 Select external DC FM press EXT DC 3 Turn the RF output on press RF ON OFF
26. cabinet The type of Mains plug shipped with each instrument depends on the country of destination Refer to Figure 3 2 for the part numbers of the power cables and mains plugs available The signal generator requires a power source of either 50 60 400 Hz at 100 120 V or 50 60 Hz at 200 240 V The voltage ranges for these nominal voltage values are shown in Table 3 1 Power consumption is 150 VA maximum Table 3 1 Voltage Ranges for Nominal Voltage Values Available ac Voltage Voltage Range 90 to 110 V rms 108 to 132 V rms 198 to 242 V rms 216 to 250 V rms This instrument has autoranging line voltage input be sure the supply voltage is within the specified range If a fuse failure is suspected replace the 250 V 3A type F fuse HP part number 2110 0780 as follows 1 Unplug the power cord from the line module 2 Use a flat bladed screw driver to pry and unseat the fuse housing from the line module 3 Remove the cartridge and inspect the fuse positioned toward the front of the instrument Figure 3 1 Replacing the Fuse Installation 3 3 Ema CABLE PLUG CABLE CABLE FOR USE PLUG TYPE HP PART DESCRIPTION LENGTH COLOR IN COUNTRY NUMBER CM INCHES 8120 1351 Straight 8913634 229 90 Mint Gray Great Britain 8120 1703 90 229 90 Mint Grey Cyprus Nigeria Singopore Zimbabwe E 250V 8120 1369 Straight NZSS198 ASC112 201 79 Gray eee 8120 0696 90
27. check the controller first In either case both the controller and the assembly should be checked ROM checksum failure The A3 controller has detected a mismatch in reading data from ROM Either the controller has failed in reading from ROM or the ROM data has failed Check the hardware connection between the mother board and the ROM board Volatile RAM read write failure The controller detected a failure when comparing data that was written to and then read from volatile RAM This is a hardware failure between points on the A3 board The A3 board failure should be verified and the board replaced Service Error Messages 5c 7 5c 8 Service Error Messages 627 Description Cause What To Do 628 Description Cause What To Do Battery RAM failure memory lost The battery backed RAM lost data Either the RAM has failed the battery is bad or the key was held down at power up Check the battery voltage and replace if it is incorrect Non volatile RAM read write failure The controller detected a failure when comparing data that was written to and then from non volatile RAM This is a hardware failure between points on the A3 board The A3 board failure should be verified and the board replaced Replaceable Parts Introduction Assembly Replacements To order parts contact your local Hewlett Packard sales and service office A list of the offices is given on page v at the front of t
28. conditions in the event register to be reported in the summary bit ENABle Queries the enable mask POWer EVENt CONDition ENABle lt NR1 gt ENABle MODulation EVENt CONDition ENABle lt NR1 gt ENABle HP IB Programming 2 19 SYSTem Subsystem SyYSTem ERRor Returns any system error message The format of the response is lt error number gt lt error string gt VERSion Returns a formatted numeric value corresponding to the SCPI version number for which the instrument complies The format of the response is YYYY V The Ys represent the year version for example 1990 and the V represents an approved revision number for that year 2 20 HP IB Programming HP IB Capabilities The instrument is designed to be compatible with a controller that interfaces in terms of the bus codes summarized in the table This table describes each of the interface functions that are available with this instrument as defined by the IEEE 488 2 1987 Table 2 3 IEEE 488 2 Capabilities Paraeroa pro Noca Controller No Capability Electrical Interface Tristate 1 MB sec Max HP IB Programming 2 21 HP IB Connector Information Hewlett Packard Interface Bus Signal Ground Shield Connect to sarth ground P O Twisted Pair With 11 ATN Should be grounded P O Twisted Peir Wit 10 SRQ near termination ot P O Twisted Pair With 9 IFC other wire of twisted P O Twisted Pair With 8 NDAC pair P O Twis
29. controller on the A3 board Each RPG receives power and ground from the controller Each RPG returns two out of phase pulsed lines when the knob is turned The keyboard is a matrix of keys as shown in Table 5a 1 The keyboard is scanned by the controller Scanning pulses are sent alternately to the keyboard rows and are read back on the columns when a key is pressed The controller determines which key was pressed based on the row that was pulsed and the column that the signal was returned on The column lines are pulled up through resistors and are pulsed low when a key is pressed The row output latches are open collector therefore pulses can not be seen until the circuit is completed by pressing a key The keyboard connects directly to the controller at A3J3 The display is driven by the controller through data latches on the A3 assembly The display contro lines are eight bi directional data lines an enable clock line a read write line and a data instruction line The other lines going to the display are the backlight 5 V and ground display 5 V and ground and the contrast control The enable clock line is high during every data interchange The read write line is high for a read operation and low for a write operation The data instruction line is high for a data operation and low for an instruction operation The data instruction line is used only during write operations Data refers to the character data while instruction refers t
30. el wo N hu va The RF output port is reverse power protected to 50 W or 25 Vdc into 500 When the instrument senses a reverse power signal it turns the RF output off the step attenuator to maximum attenuation and the vernier to its lowest setting A message appears in the second line of the display when the reverse power protection has been activated After you have removed the reverse power signal from the RF output press the key to turn the output signal on again Applying a signal source exceeding 50 W or 25 Vdc into 500 to the RF output port or maintaining a signal source at the RF output for an extended period of time may damage the instrument Operation Reference 1b 19 Rear Panel Operation Aup jeueds 162525252509 25 05950850 2562696286209G262902696 0696060906000900080 80808080808080809000 y 09090902020202020920 Rear Panel 5 MHz or 10 MHz external reference source connected to the input that is within 5 ppm When the internal timebase is being used the output connector provides a 10 MHz 1 Vrms level signal can be optimized for viewing the display from above below or instruments timebase reference The instrument will lock to a 2 MHz directly in front of it This knob controls the front panel display contrast Display contrast These connectors provide the input and output ports for the 1 10 MHz REF INPUT and OUTPUT 2 DISPLAY CONTRAST
31. frequency FREQUENCY HERE MODULATION ram AMPLITUDE 490 00000 MHz ref4 drw 5 Turn on the reference mode without changing the reference frequency FREQUENCY SSSR MODULATION mea AMPLITUDE 10 000004 MHz refs drw la 18 Operation Examples 6 Change the displayed units to kHz Note that for amplitude reference settings are displayed in dB units only Setting a New Reference Value 7 Set the current output frequency as the new reference frequency at any time FREQUENCY HESSE MODULATION SRE AMPLITUDE 0 00AkHz ref7 drw Operation Examples 1a 19 Holding the Output In this example you will hold the output attenuator so it does not change ranges when you change the amplitude setting This will Attenuator Range prevent attenuator range changes from affecting the output signal Set the Amplitude 1 Set the amplitude level to 82 dBm Level FREQUENCY SS MODULATION ja AMPLITUDE 82 0 dBm Holding the 2 Hold the attenuator at this setting Attenuator atin2 drw 1a 20 Operation Examples Adjusting the 3 Adjust the amplitude setting Amplitude Now amplitude changes do not cause the attenuator to change its range setting Consequently amplitude changes are limited to the range provided by the instrument s vernier For information about the instrument s vernier ranges refer to Chapter 1b Operation Reference Operation Examples 1a 21 1b
32. kHz of FM deviation set the instrument for 2 kHz of FM The external source set to 0 5 V peak will provide another 1 kHz of deviation If the external source is set to less than 0 5 V peak the modulation level provided by the source will be less than one half of the displayed resolution The following equation may be helpful for determining the appropriate modulation level setting for the instrument when the level of the external source is less than 0 5 V A 1 E D Where A Actual modulation level E D For example to set up for 3 kHz of FM deviation with an external source set to 0 3 V peak the instrument s displayed modulation level would be External source level Displayed modulation level tof 8kH2 ES This port outputs a 1 Vpk into 6009 audio tone when an internal modulation source is selected 400 Hz or 1 kHz When external coupling is selected EXT AC or it provides the input for a 1 Vpk into 6009 audio source Refer to the preceding table for acceptable audio ranges Operation Reference 1b 17 RF Output RF OUTPUT 1 RF ON OFF 2 ATTN HOLD 1b 18 Operation Reference Press to turn the RF output signal on or off RF OFF appears in the second line of the AMPLITUDE display when the output signal is off The instrument turns off the output signal by switching in the maximum output attenuation 130 dB and setting the vernier to its lowest setting This results in approximately
33. parts is likely to expose dangerous voltages Disconnect the instrument from all voltage sources while it is being opened The power cord is connected to internal capacitors that may remain live for 5 seconds after disconnecting the plug from its power supply Troubleshooting Information 5b 1 Troubleshooting Checklist No Ty Mains line voltage ok Display Contrast ok LJ Fan ok J Line Fuse ok NIZ d Power Supply LJ Power Supply LEDs ok voltages ok DS301 Voltage Distribution ok Power to display ok 100 00000 NHE FM 3 00 kha 100 0 dBm io 5b 2 Troubleshooting Information Does the Signal Generator Appear to Power Up Normally Error Message Yes J RF Output ok y MOD INPUT OUTPUT ok O y 10 MHz REF OUTPUT ok E Module 1 0 Specifications ok chkist_c tif SR AC Mains line Fuse Removal To Remove the Fuse Warning 1 Unplug the power cord from the mains line module 2 Use a flat bladed screw driver Figure 5b 1 to pry and unseat the fuse housing from the line module 3 Remove the cartridge and inspect the fuse nearest the front of the instrument For continued protection against fire hazard replace the fuse only with the same type and ratings 3A 250 V type F The use of other fuses or materials is prohibited fusermvi drw Figure 5b 1 Removing the Fuse
34. register number 001 No external dc coupling for PM This message is displayed when PM is selected and or is also selected DC coupling of an external source is not possible for PM If you press you will actually get 1 kHz and external ac Or select coupling for PM Additional internal plus external modulation capabilities such as 1 kHz EXT AC are available through HP IB control of the instrument refer to Chapter 2 HP IB Programming Operation Messages 1c 1 1c 2 Operation Messages 002 003 004 005 006 007 008 010 Modulation exceeds deviation range This message is displayed when modulation is set to a level that exceeds the operating range of the instrument This condition occurs when a modulation level is entered that is out of range for the current RF frequency setting or when the RF frequency setting is changed and the modulation setting is out of range for the new setting There are no registers available This message is displayed when an attempt is made to save a memory register and all of the instrument s memory registers have already been used Delete any unneeded registers in order to save new ones Deleting registers from any sequence will make them available for saving new settings in the sequence you are using Invalid units selection This message is displayed when a units key is pressed that is not valid for the active function Check that the units key you select is labeled
35. should light when the cable is connected to the AUXILLARY INTERFACE connector on the rear panel of the instrument If it does not light refer to Chapter 5b Troubleshooting Information 2 Copy Arrow Keys Note 3 BUSY Memory Interface Press these keys to initiate a copy of the memory registers between the instrument and the HP 83301A After the instrument has successfully completed the copy it will display a message to let you know Making a Copy When the HP 83301A is connected to the instrument press the J to copy all of the memory registers saved in the instrument into the HP 83301A s memory After you have pressed an arrow key you must also press the key on the instrument s front panel to begin the copy process Press the to copy the memory registers stored in the HP 83301A into the instrument s memory Copying memory into the instrument or the HP 83301A causes any existing memory registers in the receiving device to be erased It does not effect the memory in the sending device however This light is turned on while memory registers are being copied from one device to another Attempting to operate the instrument or memory interface while this light is on may cause the memory data to be corrupted The light will turn off when the copy is complete If the Busy light flashes for a few seconds and then turns off the instrument did not find valid memory register data in the memory interface If the Busy
36. term gt Sets the frequency of the PM internal signal source Legal values are 400 Hz and 1 kHz RST value is 1 kHz HP IB Programming 2 17 POWer Subsystem 2 18 HP IB Programming SOURce POWer LEVel IMMediate AMPLitude Returns the value of the current CW amplitude The return value is in units of DBM if POWer REFerence STATe is OFF or it is in DB relative to the current value of POWer REFerence if POWer REFerence STATe is ON LEVel IMMediate AMPLitude lt NR gt lt ampl term gt Sets CW amplitude RST value is 136 dBm ATTenuation AUTO AUTO ON OFF 110 When set ON the firmware will control the attenuators Turning it OFF causes the attenuator range to hold to it s present setting RST value is ON REFerence REFerence lt NR gt lt ampl term gt Sets a reference value which if STATe is ON allows all amplitude parameters to be queried set as relative to the reference value RST value is 0 dBm STATe STATe ON OFF IO Determines whether amplitude is output in absolute or relative mode RST value is OFF STATus Subsystem STATus QUEStionable EVENt Returns the contents of the event register associated with the status structure CONDition Returns the contents of the condition register associated with the status structure Reading the condition register is nondestructive ENABle lt NR1 gt Sets the enable mask which allows true
37. the 1 kHz modulation source is not present Either the 200 kHz reference signal from the A4 modulation source has failed or the A3 board has failed However if the 400 Hz modulation source has already been tested the failure is most likely the A3 board Replace the A3 board AM modulation path failure The AM path detector indicates a failure at the output of the A3 board Either the signal output has failed or the detector has failed Replace the A3 board FM modulation path failure The FM path detector indicates a failure at the output of the A3 board Either the signal output has failed or the detector has failed Replace the A3 board 618 Description Cause What To Do 619 Description Cause What To Do 620 Description Cause What To Do 625 Description Cause What To Do 626 Description Cause What To Do PM modulation path failure The PM path detector indicates a failure at the output of the A3 board Either the signal output has failed or the detector has failed Replace the A3 board Modulation 20 dB step failure The 20 dB step attenuator has failed The A3 board has failed Replace the A3 board Comm failure A serial communication failure has occurred with the indicated assemblies Either the A3 controller has failed or the indicated assembly has failed If one assembly has failed check the indicated assembly If multiple failures have occurred
38. timebase adjust labeled NOT USED controls the display of these messages Press to copy memory FROM 8647 8 This message is displayed when the J key is pressed on an HP 83301A Memory Interface connected to the instrument Press the key to copy the memory registers saved in the instrument into the memory interface Copying registers from 8647 8 This message is displayed while the memory registers are being copied from the instrument to the HP 83301A Memory Interface Press to copy memory TO 8647 8 This message is displayed when the f key is pressed on an HP 83301A Memory Interface connected to the instrument Press the key to copy memory registers that had been saved in the memory interface into the instrument Operation Messages 1c 3 1c 4 Operation Messages 023 024 025 026 Copying registers to 8647 8 This message is displayed while the memory registers are being copied from the HP 83301A Memory Interface to the instrument Invalid data in Memory Interface This message is displayed when the instrument detects that the HP 83301A Memory Interface does not contain valid memory register data Try copying a memory register into the memory interface first then initiate a copy from the memory interface to the instrument again Communication failure copy aborted This message is displayed when the instrument is not able to successfully copy memory registers between the instrument and the HP 83301A Mem
39. with the appropriate units for the value you are entering Increment value entry out of range This message is displayed when the key is pressed and a value is entered that is not within the increment value range for the active function Refer to Increment Set in Chapter 1b Operation Reference for a listing of the increment value ranges End of increment range This message is displayed when the f or Q increment arrow key is pressed and the increment value does not set the instrument to a setting that is within the instrument s allowable range To view or change the increment value press the key Refer to Increment Set in Chapter lb Operation Reference for a listing of the increment value ranges Entered value out of range This message is displayed when a value is entered that does not set the RF output signal within the instrument s allowable range Refer to Function in Chapter 1b Operation Reference for information on the instrument s allowable ranges Amplitude exceeds specified range This message is displayed when the instrument s amplitude is set to a level that exceeds 10 dBm End of knob range This message is displayed when the knob is turned but changing the selected digit would set the instrument to a value that is not within its allowable range 011 012 013 014 015 020 021 022 Amplitude exceeds ATTN HOLD limits This message is displayed
40. 00 Hz high pass 15 kHz low pass O Detectors Peak For the RF level accuracy performance test the HP 8902A with a HP 11722A sensor is required No other equipment substitutions are allowed for this test m HP 8566B RF Spectrum Analyzer O Frequency range 1 MHz to 2000 MHz o Relative level accuracy 2 dB m HP 11722A Sensor Module FM Accuracy Performance Test aaa FM Accuracy Performance Test Connect the Test Equipment 02000 O ooog O O O O pur Pied pan Measuring Receiver HP 8647A under test ptest1 drw Figure 8 1 FM Accuracy Equipment Setup Configure the Measuring Receiver Configure the HP 8647A Measure Deviations ao F WO N e A Ww N me p Reset FM mode Peak detector 300 Hz high pass filter 15 kHz low pass filter Turn FM on press MOD ON OFF Set the rate press INT 1 kHz Set the amplitude press GBM Turn the RF output on press RE ON OFE Enter the frequencies and deviations shown in the test record 2 Record the test results and compare the results to the limits in the test record Performance Tests 8 3 FM Distortion Performance Test FM Distortion Performance Test Connect the Test Equipment Audio Analyzer ptest2 drw E LED E O HIGH HP 8647A under test SO DE 6 rie aja O Ooo SENSOR O ODO INPUT 50 2 EE DO Measuring Receiver Figure 8 2 FM Distortion
41. 0950 2293 08647 61811 08647 69811 08647 61814 1420 0338 1252 2161 1252 1487 1250 1842 1250 1842 2100 4507 3101 2264 08647 61845 08647 69045 08920 40009 08920 40016 08647 61846 08647 69046 08647 61847 08647 69047 08920 40009 08920 40016 DN pk um pa PD 2 ee ee bd bi ee ee ee et bei ee ee bd ds oe hi be pa 6 2 Replaceable Parts Table 6 1 Replaceable Parts continued Number 08647 61848 OUTPUT ASSY KIT 08647 69048 EXCHANGE OUTPUT ASSY KIT 08920 40009 CAM LEVERS P O A6 08920 40016 LEVER LOCKS P O A6 A7 08647 61803 ATTEN KIT 08647 69803 EXCHANGE ATTEN KIT A9 9135 0270 FILTERED LINE MOD 0361 1265 RIVETS HOLDS A9 TO MP1 Bl 3160 0597 FAN TBAX 48CFM Fi 2110 0780 FUSE 3 A 250 V NOT SHOWN MP1 08647 61002 ASSEMBLY CHASSIS MP2 08647 00007 COVER CARDBOX MP3 08647 00006 COVER MOTHER BOARD MP4 08647 00013 COVER RF MP5 08647 00020 MOUNT POWER SUPPLY MP6 08647 00018 CLAMP MEMORY BOARD BRACKET MP7 08647 00018 CLAMP CABLE BRACKET MP8 08647 00005 COVER INSTRUMENT MP9 5041 3621 LINE SWITCH KEY CAP MP 10 13 5041 8801 FOOT FULL MOD MP 12 23 0515 0383 SCREW MACHINE ASSEMBLY M4 X 0 7 16MM LG MP 14 15 08647 40003 REAR FOOT HANDLE MP 16 25 0515 0380 SCREW MACH 4 0 10SEMPAN TX MP34 35 2950 0054 NUT HEX 1 2 28 MP38 77 0515 0380 SCREW MACH 4 0 1OSEMPAN TX MP78 81 0515 0383 SCREW MACHINE ASSEMBLY M4 X 0 7 16MM LG MP82 85 0361 1341 RIVET NYL 3 9DIA HOLDS B1 TO MP1 sl 3101 2216
42. 1 Acceptable HP IB addresses are 00 through 30 2 LOCAL Press to return to front panel operation when the instrument has been set for remote HP IB operation The SEQ and REG fields will replace the HP IB status indications in the second line of the FREQUENCY display when the instrument is returned to local operation Operation Reference 1b 9 Memory MEMORY TEST2 drw 1b 10 Operation Reference The memory keys allow you to save instrument settings into memory registers and recall the registers in a numeric sequence Up to 10 register sequences can be defined 0 through 9 A sequence can contain up to 100 registers 00 through 99 There are a total of 300 registers available in the instrument The registers can be used in the sequences in any combination such as 10 sequences of 30 registers each or 3 sequences of 100 registers each as long as the total does not exceed 300 registers It is not possible to have all 10 sequences each contain 100 registers as that would be 1000 registers 100 00000MHz 00kHz 136 0dBm 0 REGO 1kHz OFF _ RF OFF os YLT eae o EE Er mo Ne mme fx Rec Y REG 00 gt 300 REG REG 99 MEMORY key entries are automatically terminated after you enter the last digit Register key entries SAV DEL and require two digits Sequence key entries SEQ require one digit 1 SAV Note Memory Press and a register number 00
43. 10 Queries the condition of the POWer register Line 20 Enters the condition of the POWer register into the variable Value Line 30 Uses the HP Basic command BINAND to check the contents of bit O in Value If bit 0 is a 1 Rpp will equal 1 Line 40 Checks if the RPP condition is 1 and if true prints that the RPP is engaged Line 50 Checks if RPP condition is 1 and if true asks if the situation has been corrected Line 60 Checks if the answer was yes to correction and if true turns the RF output on to reset the RPP This instrument provides a message if an amplitude entry is requested above 10 dBm and less than or equal to 13 dBm or an attenuator hold range is exceeded see operating part of manual When an unspecified amplitude is entered the front panel display will read Amplitude exceeds specified range but must be queried for HP IB reporting HP IB Programming 2 11 2 12 HP IB Programming Example Check the Condition of Unspecified Power Entry 18 OUTPUT 719 STATS QUES POW COND 16 ENTER Fi iVaslue fa A EHC Line 10 k k on Line 20 Line 30 Line 40 38 Fou pec EIMANDO values 22 4 IF Fow spec s2 THEH PRINT Amplitude unspecified Queries the condition of the POWer register Besides querying the condition you may also query if an event has occurred Replace the COND with EVEN to read the event status Reading the event status clears the regi
44. 11 REG la 15 1b 12 remote interface 1b 22 re numbering la 13 RF output 1b 18 1b 19 sequence la 7 total 1b 12 remote interface memory 1b 23 repair 5 1 Replaceable Parts 6 1 reverse power 1b 19 reverse power protection status reporting 2 11 RF ON OFF 1b 18 RF output la 2 ON OFF la 3 RPG theory of operation 5a 2 Index 5 Index 6 safety class I 3 1 safety earth ground 3 1 SAVE SAV 1 3 1a 7 SAV 1b 11 SCPI command reference programming 2 13 SCPI version 2 20 SEQ 1a 7 sequence SEQ 1b 13 1b 23 total 1b 10 service information 5 1 service support software part number 6 2 shipping instructions 5 1 shipping the signal generator 3 6 sig gen synth theory of operation 5a 4 sig gen synth kit part number 6 2 sign 1b 6 simplified block diagram 5a 1 software operation verification 5 2 source 1b 15 1b 17 special function representations viii status reporting clearing status 2 10 HP IB 2 8 programming 2 8 query instrument settings 2 4 unspecified power entry status 2 11 storing 3 5 synthesizer theory of operation 5a 4 temperature 3 5 terminate 1b 10 test record 8 19 theory of operation 5a 1 10 Mhz 5a 4 Al 5a 2 A2 5a 3 A3 5a 3 A4 5a 4 A5 5a 4 A6 5a 4 A7 5a 5 attenuator 5a 5 controller 5a 3 display 5a 2 front panel 5a 2 keyboard 5a 2 LCD 5a 2 modulation distribution 5a 3 motherboard 5a 3 output 5a 4 post regulator 5a 3 power supply
45. 170 dB of carrier isolation Press to hold the electronic step attenuator at its current setting HOLD appears in the second line of the AMPLITUDE display when the attenuator hold function is on When the attenuator hold function is on amplitude adjustments are limited to the range of the instrument s vernier The vernier provides 0 1 dB per step adjustment resolution across its specified 10 dB range Vernier Ranges The following table 10 dB Specified Vernier Ranges provides the upper and lower limits of each vernier range The instrument s amplitude setting when you press the key determines which vernier range is used The vernier is allowed to over range and under range beyond the limits shown in the table when is selected However amplitude settings that exceed the limits may not provide output levels that are within the accuracy specifications of the instrument 3 RF OUTPUT Caution RF Output 10 dB Specified Vernier Ranges Upper and Lower Limits 10 0 dBm to 5 9 dBm 6 0 dBm to 15 9 dBm 16 0 dBm to 25 9 dBm 26 0 dBm to 35 9 dBm 36 0 dBm to 45 9 dBm 46 0 dBm to 55 9 dBm 56 0 dBm to 65 9 dBm 66 0 dBm to 75 9 dBm 76 0 dBm to 85 9 dBm 86 0 dBm to 95 9 dBm 96 0 dBm to 105 9 dBm 106 0 dBm to 115 9 dBm 116 0 dBm to 125 9 dBm 126 0 dBm to 136 0 dBm OMNA A WD _ qua mo bi
46. 21 5 HP IB Connector 1b 21 6 TIMEBASE ADJUST and Help Switches 1b 21 Remote Interface Accessory 1b 22 1 MOD ON OFF 1b 22 2 RFON OFF 1b 22 3 Sequence Selection Arrows 1b 23 Contents 2 lc 4 Register Recall Arrows 1b 23 Memory Interface Accessory 1b 24 1 POWER sos ah diner So a M Re 1b 24 2 Copy Arrow Keys 1b 25 Making a Copy 10 25 Oi BUSY E oA alka mp Be nat ae Se hots ie 1b 25 Operation Messages Front Panel Operation Messages le 1 HP IB Command Errors 1c 5 HP IB Execution Errors 1c 7 HP IB Device Specific Errors 1c 7 HP IB Query Errors lc 7 Service Messages 1c 8 HP IB Programming Background 2 1 Programming Guidelines 2 3 HP IB Definition 2 3 What is Programmable 2 2 2 3 HP IB Address 2 3 Error Messages 2 00008 0G 2 3 Programming Language 2 2 3 QUERY a Lisa veal ae ee at Ga eas ey a A 2 3 Advanced Programming 2 3 Programming Examples 4 2 4 Programming RF Frequency
47. 29 Test Record Table 8 10 Harmonics Performance Test continued Limits dBc Ampl Freq Harm Uncertainty dBm Upper Measured dB MHz 1 30 0 1 30 0 2 30 0 2 30 0 5 30 0 5 30 0 30 0 80 0 30 0 30 0 30 0 2 3 2 3 2 3 2 3 2 3 3 3 2 3 2 3 2 3 2 3 2 2 2 2 8 30 Performance Tests Test Record Table 8 10 Harmonics Performance Test continued Uncertainty Limits dBc Ampl n a dBm dB Upper Measured a eee Ca sofia oof 10 6 or ve oof 1 a aso ae oo 10 co aso 12 600 1 Ca 000 ve soo 19 fimo iz oof 19 Performance Tests 8 31 Test Record Table 8 11 o Performance Test Limits Limits dBc paap Freq eu Ca fre e ool is e n oo ao 8 32 Performance Tests Test Record Table 8 12 DC FM ee Error Performance Test Freq Freq Limits Limits Hz Ampl Fre mane FM eee pes U taint ne q y gt Lower Measured Upper EE y EE Performance Tests 8 33 Test Record Table 8 13 RF Level Performance Test Limits Limits dBm Freq Ampl Uncertainty MHz dBm a Measured Upper dB 8 34 Performance Tests Test Record Table 8 13 RF Level Accuracy Performance Test a Limits Limits dBm Fr Ampl i ES vo Performance Tests 8 35 Test Record Table 8 13 RF Level Accuracy Performance Test a a Limits Limits dBm F
48. 5 MHz Range 0 to 100 output lt 4dBm o R Resolution 1 Accuracy 1 kHz rate 5 of setting 1 5 Rates Internal 400 Hz or 1 kHz External 20 Hz to 25 kHz typical 3 dB BW Distortion 1 kHz rate THD Noise 0 3 to 3 kHz BW at 30 AM at 90 AM Specifications 4 5 Er MA l Modulation Source Internal 400 Hz or 1 kHz front panel BNC connector provided at nominally 1 Vp p into 600 ohms External 1 Vp into 600 ohms nominal required for full scale modulation High Low indicator provided for external signals lt 10 kHz I Remote Programming Interface HP IB IEEE 488 2 1987 with Listen and Talk Control Languages SCPI version 1992 0 Functions Controlled All front panel functions except power switch and knobs IEEE 488 Functions SH1 AH1 T6 TEO L4 LEO SRI RL1 PPO DC1 DTO CO E2 A a Environmental Operating temperature range 0 to 50 C Shock and vibration Meets MIL STD 28800E Type III Class 5 Style E Leakage Conducted and radiated interference meets MIL STD 461B REOZ Part 2 and CISPR11 Leakage is typically lt 1 pV nominally 0 1 uV with a 2 turn loop at lt 1001 MHz when measured with a resonant dipole antenna one inch from any surface except the rear panel with output level lt O dBm all inputs outputs properly terminated CS General Power Requirements Internal Diagnostics 90 to 264 V 48 to 440 Hz 170 VA maximum Automatically executes on instr
49. 8 4 FM Distortion Performance Test Limits A a a i Uncertainty O O O O O O O OOOO apa ca a OR M OM OR OEM En bn Hi b qa 8 22 Performance Tests Test Record Table 8 5 AM MA Performance Test Limits Limits Ampl Rate Fr Depth i a a Uncertainty Performance Tests 8 23 Test Record Table 8 5 AM Accuracy Performance Test eee Limits Limits Ampl Rate Freq Depth Uncertaint it 0 ore bro M 8 24 Performance Tests Test Record Table 8 6 AM P Performance Test Limits Limits A Freg Depth as a Ps Uncertainty wow D CG y ND Y Y NN Wwwony wn O N Y A NN A YA NN wo Ww O oo O O O O QO O OO ojo o o O O O O O O Performance Tests 8 25 Test Record Table 8 7 Phase Modulation Accuracy Performance Test Limits rad Ampl oa o dBm D E Uncertainty trad 8 26 Performance Tests Test Record Table 8 8 Phase Modulation Distortion Re Test Limits Limits Ampl cel cited std Uncertainty Performance Tests 8 27 Test Record Table 8 9 a FM Performance Test Limits Limits Hz Ampl pas Uncertainty e ci 8 28 Performance Tests Test Record Table 8 10 Harmonics Performance Test Limits dBc Ampl Freq Harm Uncertainty dBm Me AB 4 9 k 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 2 2 2 2 Performance Tests 8
50. BM DBUV UV MV V UVEMF MVEMF or DBUVEMF termination is required in the command statement If no termination is specified then DBM is assumed command Bracketed commands are optional SCPI assumes the optional command is present param param Parameters separated by indicates that either parameter is acceptable param param Parameters separated by indicates that multiple parameters are allowed HP IB Programming 2 13 AM Subsystem CAL Subsystem 2 14 HP IB Programming SOURce AM DEPTh DEPTh lt NRf gt lt AM term gt Sets AM depth in percent RST value is 30 STATe STATe ON OFF 110 Turns AM modulation ON or OFF AM is not turned on by just setting AM DEPTh Turning AM modulation ON will not automatically turn OFF any other types of modulation Turning any or all modulation types ON or OFF must be done explicitly If a modulation type is turned ON while another modulation type is ON an execution error 221 is generated and the state of the instrument is unchanged RST value is OFF SOURce SOURce INTernal EXTernal INTernal EXTernal Selects AM source RST value is INTernal EXTernal COUPling COUPling AC DC Sets source coupling for AM The GROund parameter defined by the 1991 SCPI Command Reference 17 1 9 2 is not supported RST value is DC INTernal FREQuency F
51. ERIAL NUMBERS This manual applies directly to all instruments with serial prefix 8247A and 3349A HEWLETT Ur PACKARD HP Part No 08647 90006 Printed in USA March 1994 Notice The information contained in this document is subject to change without notice Hewlett Packard makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Copyright Hewlett Packard Company 1994 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 USA Reproduced with Permission Courtesy of Agilent Technologies Inc e TT Certification Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members Regulatory The regulatory information is in Chapter 4
52. Equipment Setup Reset FM mode Configure the 1 2 3 Peak detector 4 5 Measuring Receiver 800 Hz high pass filter 15 kHz low pass filter jul Configure the Audio Distortion mode Analyzer 2 30 kHz low pass filter 84 Performance Tests Configure the HP 8647A Measure Distortion Ph CO WO 1 Record the test results and compare the results with the limits in FM Distortion Performance Test Turn FM on press MOD ON OFF Set the rate press INT 1 kHz Set the amplitude press dBm Turn the RF output on press RF ON OFF Enter the frequencies and deviations shown in the test record the test record Performance Tests 8 5 AM Accuracy Performance Test oO 0200200000200 AM Accuracy Performance Test Connect the Test Equipment Measuring Receiver 2 0000 Ed o 5 da O a HP 8647A under test RF OUTPUT ptesti drw Figure 8 3 AM Accuracy Equipment Setup Configure the Measuring Receiver Configure the HP 8647A Measure Depths 8 6 Performance Tests O Bm CO PO me ta Reset AM mode Peak detector 300 Hz high pass filter 15 kHz low pass filter Turn AM on press MOD ON OFF 2 Set the rate press INT 1 kHz 3 Turn the RF output on press RF_ON OFF Enter the amplitudes frequencies and depths shown in the test record Record the test results and compare the results to the limits in t
53. Errata Title amp Document Type 8647A Signal Generator Operation and Service Guide Manual Part Number 08647 90006 Revision Date March 1984 HP References in this Manual This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement semiconductor products and chemical analysis businesses are now part of Agilent Technologies We have made no changes to this manual copy The HP XXXX referred to in this document is now the Agilent XXXX For example model number HP8648A is now model number Agilent 8648A About this Manual We ve added this manual to the Agilent website in an effort to help you support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product You will find any other available product information on the Agilent Test amp Measurement website www tm agilent com Search for the model number of this product and the resulting product page will guide you to any available information Our service centers may be able to perform calibration if no repair parts are needed but no other support from Agilent is available Agilent Technologies Operation and Service Guide HP 8647A Signal Generator S
54. F 1b 16 source 1b 15 1b 17 status reporting 2 10 modulation distribution theory of operation 5a 3 motherboard theory of operation 5a 3 motherboard kit part number 6 2 offset la 17 1b 3 operation verification software 5 2 ordering parts 6 1 output part number 6 2 6 3 theory of operation 5a 4 packaging 3 6 Parts List 6 1 performance test record 8 19 performance tests 8 1 AM accuracy 8 6 AM distortion 8 7 CW frequency accuracy 8 18 DC FM frequency error 8 16 FM accuracy 8 3 FM distortion 8 4 harmonics 8 14 level accuracy 8 17 phase modulation accuracy 8 9 phase modulation distortion 8 10 required test equipment 8 2 residual FM 8 12 RF level accuracy 8 17 spurious 8 15 performance verification cycle 8 1 M 1b 4 plug 3 4 1b 6 post regulator theory of operation 5a 3 power 3 1 cable 3 1 3 4 memory interface 1b 24 POWER power key 1 2 power supply part number 6 2 theory of operation 5a 3 troubleshooting 5b 1 preset conditions 1b 8 programming background 2 1 command statements and descriptions 2 6 guidelines 2 3 language 2 3 SCPI 2 1 2 3 status reporting 2 8 query status reporting 2 4 rear panel 1b 20 recall 1a 9 1a 15 1b 12 1b 14 reference adjustment 6 3 theory of operation 5a 4 reference connectors 1b 20 reference kit part number 6 2 REF ONJOFF 1b 3 REF SET la 17 1b 3 REG 1b 23 REG 1 3 la 7 la 15 register 1b 10 delete la
55. LINE SWITCH 0515 1940 SCREW MACH 2 5 6PCHPANTX P O S1 wi 08647 61007 MODULATION CABLE w2 08647 61011 DISPLAY CABLE W3 08647 61021 RF OUTPUT CABLE W4 08647 61005 POWER SUPPLY CABLE W5 NOT ASSIGNED w6 08647 61004 ASSY INCLUDES LINE SWITCH S1 AND WIRE HARNESS AND LINE MODULE A9 Miscellaneous 08647 90018 TRANSIT CASE Accessory Replaceable Parts 6 3 Adjustments Internal Timebase Adjustment Recommended Equipment or equivalent Procedure Use this procedure to adjust the internal timebase reference DACs The internal reference oscillator is adjusted with two DACs one for coarse tuning and one for fine tuning Using the two DACs the internal reference oscillator can be adjusted to the resolution of the frequency counter used m HP 5316B Frequency Counter HP 5065 Frequency Standard m Turn the signal generator UUT off m Set the rear panel timebase adjust switch to on 1 ma Turn the signal generator on and wait for the 5 second self test to finish m Connect the equipment as shown m Follow the instructions on the signal generator s display and adjust the knobs until the counter reads exactly 10 000 000 MHz When the adjustment is complete turn the signal generator off m Set the rear panel Timebase Adjust switch to off 0 COUNTER FREQUENCY STANDARD External RF Output Frequency Input adifig1 drw Internal Timebase Adjustment Setup Adjustments 7 1 Performance Test
56. MODulation register from reporting their status in the summary bit to QUEStionable Line 20 Enables bit 7 decimal equivalent 128 in the QUEStionable register Enabling this bit masks other bits in the QUEStionable register from reporting their status in the summary bit to STATus Line 30 Enables bit 3 decimal equivalent 8 of the STATus register Enabling this bit masks other bits from reporting Line 40 Uses the HP Basic command SPOLL Serial Poll to see if the service request bit is reporting any interrupts Line 50 Clears all status registers Clearing the status registers is not absolutely necessary but is used here because of the unknown state of the instrument Reverse Power Protection Status Unspecified Power Amplitude Entry Status This instrument provides protection from signals inadvertently applied to the RF output of the instrument This protection is commonly called reverse power protection RPP The instrument automatically detects the reverse power which in turn disconnects the instruments RF output When the RPP engages the front panel display will read RF OFF but must be queried for HP IB reporting Example Check the condition of the RPP 16 OUTPUT Tios STAT QUES PONS COND 6 ENTER 7193 Value 56 RPPSEINAND values 11 46 IF Rep 1 THEM PRINT RFF is engaged 36 IF Epp 1 THEM IMPUT Is reverse power input corrected y Ha AE Be IF A Y THEN GUTPUT PIS OUTP STAT OW ra END Line
57. Measure Deviations 1 Set the frequencies and deviations shown in the test record 2 For each data point measure the carrier frequency with FM turned off press MOD ON OFF 3 For each data point measure the carrier frequency with FM turned on press MOD ON OFF 4 Compute the error difference and compare it to the corresponding limits in the test record 8 16 Performance Tests RF Level Accuracy Performance Test RF Level Accuracy Performance Test Connect the Test Equipment HP 8647A under test o a aso O O cc SENSOR E EEES DO O Gypur son ptest4 drw Measuring Receiver Figure 8 11 RF Level Accuracy Equipment Setup Configure the 1 Reset Measuring Receiver 2 RF power mode tuned RF level mode for levels lower than 10 dBm 3 Connect the measuring receiver and HP 8647A timebases 4 Set to measure in dBm press Note Make sure to enter the power sensor s calibration data into the measuring receiver and zero the power sensor Refer to the measuring receiver s operating manual Configure the HP 1 Turn the RF output on press RF_ON OFF 8647A 2 Turn modulation off press MOD ON OFF Measure Amplitudes 1 For each frequency the measuring receiver must be calibrated for tuned RF level operation 2 Set the frequency and amplitude shown in the test record 3 Measure the amplitude shown in the test record 4 Record the test results and compare t
58. REQuency Subsystem OUTPut Subsystem 2 16 HP IB Programming SOURce FREQuency CW FIXed CW FIXed lt NR gt lt freq term gt This function selects a frequency for the continuous wave non swept signal RST value is 100 MHz OUTPut STATe STATe ON OFF 110 This function controls the state of the RF output When OUTPut STATe is OFF the RF source level is set to off Turning OUTPut STATe ON causes the programmed CW signal to be present at the output terminal RST value is OFF PM Subsystem SOURce PM DEViation DEViation lt NRf gt lt angle term gt Sets PM deviation in radians RST value is 1 0 RAD STATe STATe ON OFF 110 Turns PM modulation ON or OFF PM is not turned on by just setting PM DEViation Turning FM modulation ON will not automatically turn OFF any other types of modulation Turning any or all modulation types ON or OFF must be done explicitly If a modulation type is turned ON while another modulation type is ON an execution error 221 is generated and the state of the instrument is changed RST value is OFF SOURce SOURce INTernal EXTernal INTernal EXTernal Selects PM source RST value is INTernal EXTernal COUPling COUPling AC DC Sets source coupling for PM The GROund parameter defined by the 1991 SCPI Command Reference 17 10 9 2 is not supported RST value is DC INTernal FREQuency FREQuency lt NRf gt lt freq
59. REQuency lt NRf gt lt freq term gt Sets the frequency of the AM internal signal source Legal values are 400 Hz and 1 kHz RST value is 1 kHz SOURce CAL DCFM Eliminates the offset in de FM so that the carrier frequency remains the same with no modulation applied External de modulation must be on to implement this calibration or execution error 221 is generated FM Subsystem SOURce FM C DEViation DEViation lt NRf gt lt freq term gt Sets FM deviation RST value is 3 kHz STATe STATe ON OFF 1110 Turns FM modulation ON or OFF FM is not turned on by just setting FM DEViation Turning FM modulation ON will not automatically turn OFF any other types of modulation Turning any or all modulation types ON or OFF must be done explicitly If a modulation type is turned ON while another modulation type is ON an execution error 221 is generated and the state of the instrument is unchanged RST value is OFF SOURce SOURce INTernal EXTernal INTernal EXTernal Selects FM source RST value is INTernal EXTernal COUPling COUPling AC DC Sets source coupling for FM The GROund parameter defined by the 1991 SCPI Command Reference 17 4 9 2 is not supported RST value is DC INTernal FREQuency FREQuency lt NRf gt lt freq term gt Sets the frequency of the FM internal signal source Legal values are 400 Hz and 1 kHz RST value is 1 kHz HP IB Programming 2 15 F
60. RS Hewlett Packard S A 150 Route du Nant d Avril 1217 Meyrin 2 Geneva Switzerland 41 22 780 8111 France Hewlett Packard France 1 Avenue Du Canada Zone D Activite De Courtaboeuf F 91947 Les Ulis Cedex France 33 1 69 82 60 60 Germany Hewlett Packard GmbH Hewlett Packard Strasse 6380 Bad Homburg v d H Germany 49 6172 16 0 Great Britain Hewlett Packard Ltd Eskdale Road Winnersh Triangle Wokingham Berkshire RG11 5DZ England 44 734 696622 INTERCON OPERATIONS HEADQUARTERS Hewlett Packard Company 3495 Deer Creek Rd Palo Alto California 94304 1316 415 857 5027 Australia Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 61 3 895 2895 Canada Hewlett Packard Canada Ltd 17500 South Service Road Trans Canada Highway Kirkland Quebec H9J 2X8 Canada 514 697 4232 Japan Yokogawa Hewlett Packard Ltd 1 27 15 Yabe Sagamihara Kanagawa 229 Japan 81 427 59 1311 China China Hewlett Packard Co 38 Bei San Huan X1 Road Shuang Yu Shu Hai Dian District Beijing China 86 1 256 6888 Singapore Hewlett Packard Singapore Pte Ltd 1150 Depot Road Singapore 0410 65 273 7388 Taiwan Hewlett Packard Taiwan 8th Floor H P Building 337 Fu Hsing North Road Taipei Taiwan 886 2 712 0404 OOo ee Safety Notes The following safety notes are used throughout this manual Familiarize yourself with each of the notes and its meaning before op
61. Set Ranges Function Range It is possible to set an increment value of greater resolution than can be displayed or than the hardware can respond to However the instrument records each arrow key press and will respond after the appropriate number of presses Operation Reference 1b 5 Data Data 1 MHz dBm datakeys drw Note 2 Backspace 3 emf 1b 6 Operation Reference Press a units key after you enter a value This terminates the entry Note that the units keys in the left column are each labeled with an amplitude unit on the bottom and a frequency or modulation unit on the top The instrument applies the appropriate unit for the function value you are entering The bottom key in the row for instance terminates a 6M entry in radians or an amplitude entry in dByV Memory register selections sequence selections and HP IB address entries do not require a units key to terminate the entry These entries are automatically terminated after the last digit is entered Units Conversion You can change the units of the displayed frequency or amplitude value by selecting the FUNCTION frequency or amplitude and then pressing a units key The instrument will convert the displayed value to the equivalent value for the units key you pressed Press when entering a numeric value to backspace and remove the last digit entered Press these keys to display the amplitude value indicated on the key
62. Test 8 21 8 4 FM Distortion Performance Test 8 22 8 5 AM Accuracy Performance Test 8 23 8 6 AM Distortion Performance Test 8 25 8 7 Phase Modulation Accuracy Performance Test 8 26 8 8 Phase Modulation Distortion Performance Test 8 27 8 9 Residual FM Performance Test 8 28 8 10 Harmonics Performance Test 8 29 8 11 Spurious Performance Test 8 32 8 12 DC FM Frequency Error Performance Test 8 33 8 13 RF Level Accuracy Performance Test 8 34 8 14 CW Frequency Accuracy Performance Test Option 1E5 Only 22258 iris a a a E Bhd BAS td RS 8 39 Contents 6 Operation Operation contains the following information 1 Operation Provides a quick overview of the instrument s operation la Operation Provides examples to help you learn how to operate Examples the instrument lb Operation Provides quick access to information about each of Reference the instrument s functions Operation Provides information about both front panel and Messages HP IB remote operation messages Note For information about service messages numbered 500 and above refer to Chapter 5c Service Error Messages Operation 1 1 Quick Overview 1 Power Key 2 Display Contrast 3 Function and Data Keys 4 Increment Set Keys 1 2 Operation 5 Knobs
63. To Do Updated cal file The RAM calibration file has been updated from the calibration ROM This is normal when a module is replaced This message requires no action Cal corrupt restored After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was done This message requires no action Modulation cal restore failure After detecting a failure comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM Replace the A3 assembly Both the calibration ROM and RAM are on the A3 assembly FM sense cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A5 assembly The calibration ROM is contained in the assembly If the failure is still present after replacing the A5 assembly replace the A3 assembly which contains the RAM Service Error Messages 5c 1 5e 2 Service Error Messages 506 Description Cause What To Do 507 Description Cause What To Do 508 Description Cause What To Do FM mult cal restore failure After detecting a failure in comp
64. al The RF output signal is not changed when you press this key Units When you press for frequency values can be entered in MHz or kHz For amplitude values can be entered in any of the amplitude units provided but they are displayed in dB only Press to turn off the reference mode if it is on or to turn on the reference mode without changing the reference value When you turn on the reference mode the displayed value indicates the offset between the reference value and the current RF output setting The RF output signal is not changed when you press this key If the RF output power seems too low look for A in the display between the power level value and the dB indicator The A tells you that reference mode is turned on The displayed value is not the output power level it is the offset between the reference value and the output power To exit the reference mode press REF ON OFF You can then reset the output power to the desired level Operation Reference 1b 3 Function Function 1 FREQUENCY 2 AMPLITUDE 1b 4 Operation Reference FM AM M The RF output frequency range is 250 kHz to 1000 MHz When making frequency changes the instrument does not turn off the RF output Frequency switching typically takes less than 120 ms Worst case conditions occur for changes which cross the instrument s two frequency band edges 249 MHz and 501 MHz The RF output amplitude range is 136 dBm to
65. aring calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A5 assembly The calibration ROM is contained in the assembly If the failure is still present after replacing the A5 assembly replace the A3 assembly which contains the RAM Output level cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A6 assembly The calibration ROM is contained in the assembly If the failure is still present after replacing the A6 assembly replace the A3 assembly which contains the RAM Attenuator cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A7 assembly The calibration ROM is contained in the assembly If the failure is still present after replacing the A7 assembly replace the A3 assembly which contains the RAM 509 Description
66. bled registers for modulation STAT QUES MOD ENAB lt NR1 gt STAT QUES MOD E VEN IEEE 488 2 Common Commands Resets the signal generator to a default state see SCPI Command Reference Returns the instrument s identity Executes an instrument self test Instrument waits until previous commands are completed Clears status and event registers Enables Standard Event Status Register bits Queries the Standard Event Status Enable Register Queries the Standard event Status Register Enables the Operation Complete bit of the Standard Event Status Register Queries the Operation Complete bit of the Standard Event Register Enables the bits in the Status Byte that will cause a Service Request Queries the Service Request Enable Register Queries the Status Byte with the MSS bit WAI CLS ESE lt dec num data gt SRE lt dec num data gt HP IB Programming 2 7 HP IB Status Reporting The IEEE 488 2 standard provides a status byte for instrument status reporting This status byte may be accessed by using IEEE 488 2 Common Commands and SCPI Status Commands The following figure shows the status reporting structure for instrument operation The following examples will be used to explain instrument operation status m External Modulation Input Status Reverse Power Protection Status a Unspecified Power Amplitude Entry Status General IEEE 488 2 status reporting will not be covered The above
67. ce does not accept one in this position for the header Invalid suffix The suffix does not follow the syntax described in IEEE 488 2 7 7 3 2 or the suffix is inappropriate for this device Suffix too long The suffix contained more than 12 characters see IEEE 488 2 7 7 3 4 Invalid character data Either the character data element contains an invalid character or the particular element received is not valid for the header Character data too long The character data element contains more than twelve characters see IEEE 488 2 7 7 1 4 Character data not allowed A legal character data element was encountered where prohibited by the device String data not allowed A string data element was encountered but was not allowed by the device at this point in parsing Block data not allowed A legal block data element was encountered but was not allowed by the device at this point in parsing Expression data not allowed A legal expression data was encountered but was not allowed by the device at this point in parsing I HP IB Execution 221 Errors 222 Settings conflict Indicates that a legal program data element was parsed but could not be executed due to the current device state see IEEE 488 2 6 4 5 3 and 11 5 1 1 5 Data out of range Indicates that a legal program data element was parsed but could not be executed because the interpreted value was outside the legal range as defined by the device s
68. cifications 4 3 A I Frequency Modulation Peak Deviation rates gt 25 Hz ac FM lt 249 MHz 0 to 100 kHz lt 501 MHz 0 to 50 kHz lt 1000 MHz 0 to 100 kHz Resolution lt 10 peak deviation gt 10 to maximum peak deviation Deviation Accuracy internal 1 kHz rate 7 5 of FM deviation 30 Hz Rates Internal 400 Hz or 1 kHz External DC dc to 75 kHz typical 3 dB BW External AC 20 Hz to 75 kHz typical 3 dB BW Distortion 1 kHz rate THD N 0 3 to 3 kHz BW lt 1 at deviations gt 4 kHz 88 to 108 MHz lt 0 5 at deviations gt 75 kHz Carrier frequency accuracy relative to CW in dc FM 500 Hz typ 200 at deviations lt 10 kHz Specifications apply over the 25 5 C range Internal 1 kHz or 400 Hz source plus external In internal plus external FM mode the internal source produces the set level of deviation The external input should be set to lt 0 5 Vpk or 0 5 Vdc one half of the set deviation 4 4 Specifications ON EEE sa Phase Modulation Peak Deviation Range lt 249 MHz 0 to 10 radians lt 501 MHz 0 to 5 radians lt 1000 MHz 0 to 10 radians Resolution 0 01 radian Deviation Accuracy internal 1 kHz rate typical 7 5 of deviation setting 0 05 radians Rates Internal 400 Hz or 1 kHz External 20 Hz to 10 kHz typical 3 dB BW Distortion 1 kHz rate lt 2 at deviations gt 3 radians Amplitude Modulation AM performance is not specified below 1
69. e la 11 delta 1b 3 display 2 1b 5 contrast 1 2 REG 1a 6 SEQ 1a 6 theory of operation 5a 2 A 1b 3 emf 1b 6 environment 3 6 equipment required performance tests 8 2 EXT AC 1b 16 EXT DC 1b 16 external source 1b 17 fan part number 6 2 firmware upgrade kit part number 6 2 FM lb 4 frequency la 2 1b 4 front frame kit part number 6 2 front panel theory of operation 5a 2 fuse 3 2 fuse removal 5b 3 grounding 3 2 help switch 1b 21 HI 1b 16 how to use this guide viii HP IB address 1b 9 2 3 definition 2 3 status 1b 9 status reporting 2 8 humidity 3 5 NERSED 12 5 ranges 1b 5 installation 3 1 connect power cable 3 1 removing the fuse 5b 3 replacing the fuse 3 2 shipping the signal generator 3 6 storing the signal generator 3 5 turn on the signal generator 3 5 unpack 3 1 instrument block diagram 5b 1 instrument preset settings 1b 8 INT 1 kHz 1b 16 INT 400 Hz 1b 16 keyboard theory of operation 5a 2 key representations viii knob 1 2 1b 2 LCD theory of operation 5a 2 level modulation 1b 17 line fuse removal 5b 1 line module part number 6 2 LO 1b 16 LOCAL 1b 9 mains fuse removal 5b 1 memory 1a 6 1b 10 remote interface 1b 23 sequence la 7 memory interface 1b 24 MOD INPUT OUTPUT 1b 17 MOD ON OFF 1b 16 modulation 1a 3 1b 4 Index 3 Index 4 HI LO 1b 16 HP IB 2 10 input level status 2 9 level 1b 17 OF
70. e internal signals are leveled by an amplifier and a 12 bit DAC The signals are then routed to the A5 sig gen synth when FM is enabled or to the A6 output for AM When internal modulation is turned on the signal is also routed to the front panel MOD INPUT OUTPUT connector External modulation signals are also routed through the modulation distribution block External signals can be either ac or dc coupled The modulation signals can be checked at A3TP1 for the FM signal and at A3TP2 for the AM signal The controller contains the microprocessor memory serial I O for the other assemblies HP IB front panel control and serial interface for the external control options Memory is broken into four sections EEPROMs ROM volatile SRAM and non volatile battery backed SRAM The ROMs are contained on a separate memory board A3A1 Theory of Operation 5a 3 A4 Reference A5 Sig Gen Synth A6 Output 5a 4 Theory of Operation The post regulating circuitry contains regulators for 12V 12V and 5 V shown as 5V F1 There is additional circuitry to derive a filtered 5 V from the power supply 5 V for the digital circuitry The 12 and 5 V regulators are driven by the 15 V supply from the A2 assembly The 12 V regulator is driven by the 15 V supply from the A2 assembly There are indication LEDs on the motherboard for the five power supplies that are lit when the power supplies are on The diagnostic latches latch signals from a
71. ective earth contact Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous Intentional interruption is prohibited EE Shipping Your Instrument Back to Hewlett Packard If it becomes necessary to ship your instrument back to HP use the original packaging or something comparable that provides sufficient padding to protect the instrument See Chapter 3 Installation for more detailed packaging information Fill out a blue repair tag and attach it to the instrument Repair tags are located at the end of this manual behind the index A list of HP sales and service offices is located at the front of this book on page v Service 5 1 Ue NT Operation This software performs a quick automated verification of the e HP 8647A functionality The software uses the HP 8902A measuring Verification receiver and HP 11722A power sensor to verify the HP 8647A level Software accuracy modulation accuracy and de FM frequency stability These tests supply a high degree of confidence that the HP 8647A is functioning correctly The software is a subset of the performance tests that are described in chapter 8 For a complete calibration all performance tests and data points described in the performance test chapter must be verified Whenever there is any doubt about the performance of the HP 8647A the manual performance tests should be used to resolve the issue This softwa
72. ee IEEE 488 2 11 5 1 1 5 T HP IB 330 Device Specific 350 Errors Self test failed Queue overflow A specific code entered into the queue in lieu of the code that caused the error This code indicates that there is no room in the queue and an error occurred but was not recorded A TT HP IB Query 410 Errors 420 430 440 Query INTERRUPTED Indicates that a condition causing an INTERRUPTED Query error occurred see IEEE 488 2 6 3 2 3 For example a query followed by DAB or GET before a response was completely sent Query UNTERMINATED Indicates that a condition causing an UNTERMINATED Query error occurred see IEEE 488 2 6 3 2 2 For example the device was addressed to talk and an incomplete program message was received Query DEADLOCKED Indicates that a condition causing a DEADLOCKED Query error occurred see IEEE 488 2 6 3 1 7 For example both input buffer and output buffer are full and the device cannot continue Query UNTERMINATED after indefinite response Indicates that a query was received in the same program message after an query requesting an indefinite response was executed see IEEE 488 2 6 5 7 5 Five second self test This message appears when the command tst is sent to the instrument over the HP IB bus The instrument runs a Operation Messages 1c 7 subset of its power up tests when this message is displayed The local key is disabled during this time Service Me
73. een the reference value and the RF output signal 6 MEMORY 7 Modulation Source Memory registers allow you to save instrument set ups and recall them whenever you wish Press and enter a two digit register number to save the instrument s current settings To recall the settings press and enter the register number The arrow keys allow you to recall registers in numerical sequence You can arrange your registers in up to ten different sequences The number of the currently selected sequence and the last register selected are always displayed in the lower left corner of the display to help you keep track of where you are in your testing process The memory register examples provided in Chapter la Operation Examples show you how to create a sequence and how to delete or add registers in your sequence Press to turn on or off the modulation source Press or to select one of the internal source tones for modulating the RF output signal These tones are also available as an output signal at the MOD INPUT OUTPUT port when they are selected Press or to ac or de couple an external audio source via the MOD INPUT OUTPUT port Press to frequency modulate the RF signal with the internal 1 kHz tone and an external source at the same time Additional internal plus external modulation capabilities are available for HP IB operation Operation 1 3 la Operation Examples This section contains operating examples to help you lear
74. erating this instrument Caution Caution denotes a hazard It calls attention to a procedure that if not correctly performed or adhered to would result in damage to or destruction of the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met Warning Warning denotes a hazard It calis attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning note until the indicated conditions are fully understood and met _ oe ASAS Instrument The following markings and caution and warning labels are used on Markings the instrument Be sure to observe all cautions and warnings Instruction The instruction documentation symbol The product Manual is marked with this symbol when it is necessary for the user to refer to the instruction in the manual The CE93 mark shows compliance with European Community 1993 standards The CSA mark is the Canadian Standards Association safety mark The ISM1 A mark is a symbol of an Industrial Scientific and Medical Group 1 Class A product Warning Hazardous voltage always present in this area with instrument power cord connected to ac line Warning Hazardous Voltage vi Caution Hazardous electrical shock Heat sink is live Disconnect power supply before servicing TE General Safety Considerations Warning Warning Wa
75. eries the condition of the MODulation register Besides querying the condition you may also query if an event has occurred such as the external modulation input being high or low at some previous time Replace the COND with EVEN to read the event status Reading the event status clears the register Line 20 Enters the condition of the MODulation register into the variable Value Line 30 Uses the HP Basic command BINAND to check the contents of bit Qin Value If bit O is a 1 it will be reported as a decimal equivalent 1 and Mod will equal 1 Line 40 Checks if the MODulation condition is 1 and if true prints that the external modulation input is high Line 50 Uses the HP Basic command BINAND to check the contents of bit 1 in Value If bit 1 decimal equivalent 2 is a 1 Mod will equal 1 Line 60 Checks if the MODulation condition is 2 and if true prints that the external modulation input is low HP IB Programming 2 9 2 10 HP IB Programming Example Generate a Service Request for External Modulation Input High or Low 16 OUTPUT 719 ATAT QJIES MOGs EMAB 2 20 OUTPUT 193 STAT QUES EHAE 125 SE OUTPUT 719 DRESS Sa IF SPOLLETISS THEN PRINT Ext Mod Input HiaheLow Detected SA OUTPUT Piss MACLE Edi EHC Line 10 Enables bits 0 and 1 decimal equivalent 3 in the MODulation register Enabling these bits masks other bits in the
76. esenting its hierarchy over CW The colon is used to separate the command hierarchy The signal generator will be programmed to a RF frequency of 500 MHz Programming RF o OUTPUT 719 FREG CU 306 MHZ FM DEV 3 KHZ FM SOUR Frequency and FM EXT FM EXT COUP AC SAM STAT OFF 2 PME STAT OFF FM STAT Modulation UN FM DEV This command programs the FM deviation FM is higher than DEV in the command hierarchy and is separated by a colon The signal generator will be programmed to 3 kHz of deviation Semicolon A semicolon separates completed command statements FM SOUR EXT This command selects the external path for the modulation source FM EXT COUP AC This command selects ac coupling FM STAT ON This command changes the FM modulation to an on state A modulation format must be turned on before it is active The other two modulation formats must be turned off prior to activating the desired modulation AM STAT OFF and PM STAT OFF 24 HP IB Programming Querying RF 1551 Frequency 28 ENTER 7193 Freq_set ar Line 100 This command outputs a query for the RF frequency setting You may attach a question mark to any of the signal generators commands to query its setting Line 200 This command enters the queried frequency setting into the variable Freq_set Line 300 This command prints the queried frequency setting Programming RF QUTPUT Pisa FOR AMPL 47 CBMs OUTP STAT OW Amplitude pow AMPL This comma
77. eset M mode Peak detector 300 Hz high pass filter 15 kHz low pass filter Turn M on press MOD_ON OFF Set the rate press INT 1 kHz Set the amplitude press 4 dB M Turn the RF output on press RF_ON OFF Enter the frequencies and deviations shown in the test record 2 Record the test results and compare the results to the limits in the test record Performance Tests 8 9 Phase Modulation Distortion Performance Test Phase Modulation Distortion Performance Test Connect the Test Equipment Audio Analyzer ptest2 drw ee a _ HP 8647A under test RF OUTPUT Measuring Receiver Figure 8 6 Phase Modulation Distortion Equipment Setup Reset 6M mode Configure the 1 2 3 Peak detector 4 5 Measuring Receiver 300 Hz high pass filter 15 kHz low pass filter pot Configure the Audio Distortion mode Analyzer 2 30 kHz low pass filter 3 Set low input to ground 8 10 Performance Tests Configure the HP 8647A Measure Distortion CO Nm Phase Modulation Distortion Performance Test Turn M on press 9 MOD ON OFF Set the rate press INT 1 kHz Set the amplitude press 4 dB m Turn the RF output on press RF_ON OFF Enter the frequencies and deviations shown in the test record Record the test results and compare the results to the limits in the test record Performance Tests 8
78. ess to turn on the RF output RF OFF is displayed below the amplitude setting when the RF output is turned off 100 00000 MHz FM 3 00 kHz 100 0 dBm RF OFF 100 00000 MHz FM 3 00 kHz 100 0 dBm E O DO00OO DODOO Oocoo ca es fom cea we So Do O funct3 drw Setting the 4 Set the FM deviation to 3 kHz Modulation The modulation rate is displayed below the deviation setting Use the MODULATION SOURCE keys when you wish to select a modulation source and turn modulation on or off FREQUENCY HE MODULATION SSSR AMPLITUDE 100 00000 MHz FM 3 00 kHz 100 0 dBm 1 kHz funct4 drw Operation Examples 1a 3 Ore a Incrementing or In this example you will increment the amplitude and frequency of Decrementing the the RF output signal RF Output Signal Preliminary Steps 1 If they are not already set set the frequency to 100 MHz and the amplitude to 100 dBm FREQUENCY MENOS MODULATION TREE AMPLITUDE 100 00000 MHz 100 0 dBm Incr1 drw Using the Knob 2 Increment the amplitude using the knob Press or when you wish to adjust the increment resolution FREQUENCY MEN MODULATION MN AMPLITUDE 100 00000 MHz 101 0 dBm incr2 drw ta 4 Operation Examples Using the Increment 3 Enter a frequency increment of 25 kHz keys The f symbol is displayed when you press to indicate that the displayed value is the increment set value incr3 drw 4 I
79. forms a diagnostic self test on power up If any problems are detected with functionality it will display a message Refer to Chapter 1c Operation Messages for further information about the messages This instrument is designed for use in Installation Category II and Pollution Degree 2 per IEC 1010 and 664 respectively Connecting to Other Instruments Coaxial mating connectors used with the signal generator should be either 500 BNC or 500 type N male connectors that are compatible with those specified in UL MIL C 39012 Storing the Signal Generator Note The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment m Temperature 20 C to 70 C a Humidity lt 95 relative a Altitude 15 300 meters 50 000 feet The cabinet should only be cleaned using a damp cloth Installation 3 5 ET Shipping the Signal Containers and materials identical to those used in factory packaging Generator 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 If you are using other packaging follow the guidelines below 1 Wrap the ins
80. he test record AM Distortion Performance Test AM Distortion Performance Test Connect the Test Equipment Audio Analyzer O O 2000 E SCCO O Geom INPUT 508 EME GS Measuring Receiver ptest2 drw HP 8647A under test Figure 8 4 AM Distortion Equipment Setup Configure the Measuring Receiver Configure the Audio Analyzer 1 Reset 2 AM mode 3 4 5 Peak detector 300 Hz high pass filter 15 kHz low pass filter Distortion mode 30 kHz low pass filter Set low input to ground Performance Tests 8 7 AM Distortion Performance Test 1 Turn AM on press MOD ON OFF 2 Set the rate press INT 1 kHz 3 Set the amplitude press 4 dB m 4 Turn the RF output on press RF ON OFF Configure the HP 8647A Measure Distortion 1 Enter the amplitudes frequencies and depths shown in the test Amplitudes record 2 Record the test results and compare the results to the limits in the test record 8 8 Performance Tests Phase Modulation Accuracy Performance Test SS TT Phase Modulation Accuracy Performance Test Connect the Test Equipment g aooo O 0000 o DOOM INPUT 502 50 soda Measuring Receiver HP 8647A under test ptest drw Figure 8 5 Phase Modulation Distortion Equipment Setup Configure the Measuring Receiver Configure the HP 8647A Measure Deviations A N e fred na Pp wo ND mn R
81. he results to the limits in the test record Performance Tests 8 17 LLL OT AA CW Frequency Accuracy Performance Test Option 1E5 Only Connect the Test Equipment HP 8647A under test ENS Boo e GC O os ae Be O OBM INPUT 502 OO ODOU e ptesti drw Measuring Receiver Figure 8 12 CW Frequency Accuracy Equipment Setup Configure the 1 Reset Measuring Receiver 2 Frequency mode 3 Special Function 7 1 Press 7 Configure the HP 1 Turn modulation off press MOD ON OFF 8647A 2 Set the amplitude press 4 dB M 3 Turn the RF output on press RF ON OFF Measure the 1 Enter the frequencies shown in the test record Frequency 2 Record the test results and compare the results to the limits in the test record 8 18 Performance Tests Test Record TT TT Test Record Table 8 1 HP 8647A Test Record Report Number Date Customer Tested By Ambient Temperature___________ C Relative Humidity ____________ Line Frequency______________ Hz nominal Performance Tests 8 19 Test Record Table 8 2 HP 8647A Test Record Model Report Number Date Test Equipment Used Model Number Trace Number Cal Due Date 1 Audio Analyzer 2 Measuring Receiver 8 20 Performance Tests Test Record Table 8 3 FM Accuracy Performance Test Limits kHz Amp Rate F Dev sa S ar re Uncertainty Hz Performance Tests 8 21 Test Record Table
82. his book In the U S A it is also possible to call 800 227 8164 and they will take your parts order If you need help finding the correct part number you can call HP Parts Identification at 916 783 0804 in the U S A For most parts you can either order a new assembly or an exchange assembly Exchange assemblies are factory repaired inspected and tested If you order an exchange assembly you must return the defective assembly part exview_c tif Replaceable Parts 6 1 Table 6 1 Replaceable Parts Item HP Part Description Number AY FRONT FRAME NOT AVAILABLE FOR REPLACEMENT RPG RPG FLEX CIRCUIT DISPLAY LCD 2X40 RF OUTPUT TYPE N CONNECTOR 0960 0856 0960 0856 08647 61008 2090 0312 1250 1811 08647 61810 FRONT amp FRAME ASSEMBLY 8160 0520 RFI ROUND STRIP PART OF A1MP1 08647 40008 KEYPAD DISPLAY MOUNT COVER DISPLAY KNOB CURSOR KNOB CURSOR POWER SUPPLY MOTHER BD KIT EXCHANGE MOTHER BD KIT MEMORY BOARD FIRMWARE UPGRADE KIT BATTERY 3 0V 1 2AH CONNECTOR RECT24F CONNECTOR RECT 9 F RA 10 MHZ INPUT BNC 10 MHZ OUTPUT BNC CONTRAST POTENTIOMETER TIMEBASE ADJ SWITCH STANDARD REFERENCE KIT STANDARD EXCHANGE REF KIT CAM LEVERS P O A4 LEVER LOCKS P O A4 OPT 001 HIGH STABILITY REFERENCE KIT EXCHANGE OPT 001 HIGH STAB REF KIT SIG GEN SYNTH KIT EXCHANGE SIG GEN SYNTH KIT CAM LEVERS P O A5 LEVER LOCKS P O A5 08647 00004 08647 00019 01650 47401 01650 47401
83. ibration data that is specific to the assembly The attenuator assembly contains the attenuators the reverse power protection circuitry and the temperature sense circuitry The attenuator assembly contains a calibration ROM that contains factory generated calibration data that is specific to the assembly Theory of Operation 5a 5 bb Troubleshooting Information Introduction Warning This chapter is intended to be used in conjunction with the information in chapters 5a 5c and with your own troubleshooting style The troubleshooting reference information should contain the details needed as you follow your troubleshooting process This chapter contains the following troubleshooting reference information m Troubleshooting Checklist Use the troubleshooting checklist as a reminder of things to check m AC Mains Line Fuse Removal Use these instructions to replace the AC mains fuse Modulation Test Points and Power Supply LEDs Diagram Use the diagram to check for the proper modulation reading and for a quick visual check that the power supply voltages are present m Power Supply Distribution Diagram Use the diagram to identify the correct power supply voltage distribution m Instrument Block Diagram The block diagram contains pin and connector designations as well as input output specifications See Chapter 5a Theory of Operation for the block diagram description The opening of covers or removal of
84. ister la 11 Renumbering the Registers in a Sequence la 13 Decreasing the Register Number la 13 Checking the Sequence 2 la 14 Inserting a Register in a Sequence la 15 Saving a New Register 4 la 16 Offsetting the RF Output from aReference la 17 Setting the Reference Value 2 2 la 17 Offsetting the RF Output 2 2 la 18 Turning the Reference Mode OfforOn la 18 Setting a New Reference Value la 19 Holding the Output Attenuator Range la 20 Set the Amplitude Level 2 la 20 Holding the Attenuator 4 la 20 Adjusting the Amplitude 2 2 2 la 21 Contents 1 lb Operation Reference Frequency and Amplitude 4 1b 2 1 NOD Tr Backes eve sin ai ant A Be ca En ES 1b 2 2 Digit Select Arrow Keys 1b 2 3 REF SET es oe ave ek a mag EU 1b 3 Units sam LU a ee pe Beast A ee dt ee ones es es 1b 3 4 REP ON 0FF soa ee a ee ee 1b 3 FURCHONE ois pee es ee HT Oe a Mar Bae a 1b 4 1 FREQUENCY 1b 4 2 AMPLITUDE 0 0 88 0s 1b 4 3 FMAM GM 1b 4 INCREMENT SET 1b 5 1 INCR SET 2 Gan se eo Dos ee a as 1b 5 Data a aR ee ete a ae Ses 1b 6 be MHZ ABM aa oe tie e aise Me re ag de 1b 6 Units Conversion 1b 6 2 Backspace sm
85. isters in sequence 1 if there are registers saved in it Note Sequence 1 does not contain the settings you saved in sequence 0 The instrument enables you to save different settings in each sequence to create up to ten different sequences for your testing Remember when you save or recall a register be sure that the correct sequence is also selected req0 drw ta 10 Operation Examples Deleting a Register In this example you will delete a register from the sequence you from the Sequence created in the preceding example Selecting the Sequence 1 Select sequence 0 FREQUENCY SERES MODULATION SSSR AMPLITUDE delreg0 drw Deleting a Register 2 Delete register 01 from sequence 0 Note The contents of the register are recalled when it is deleted This allows you to resave the contents if you need to FREQUENCY MSIE MODULATION S AMPLITUDE 11 00000 MHz SEQ 0 REG delreg1 drw Operation Examples 1a 11 3 Step through the remaining registers in sequence 0 The deleted register number has been removed from the sequence Note that the instrument does not renumber the registers when one is deleted 12 00000 MHz SEQ 0 REG 02 10 00000 MHz SEQ 0 REG 00 delreg2 drw 1a 12 Operation Examples Renumbering the In this example you will eliminate the skip from register 00 to register Registers ina 2 in sequence O caused when you deleted register 01 in the previous Sequence example
86. l you have saved operating settings in it again The register number is immediately deleted from the sequence when the delete entry is completed However the settings contained in the register are recalled when you delete the register so you can re save the settings if you need to Renumbering the Registers If you use the arrow keys to recall the registers in sequence the deleted register number will be skipped If you wish to eliminate the skip you can do so by moving each register following the deleted register back one register number To delete an entire sequence delete each register in the sequence Modulation Source Modulation Source bikdiag drw Modulation Source Paths the 1 kHz path is highlighted Operation Reference 1b 15 Modulation Source 1 MOD ON OFF 2 INT 400 Hz INT 1 kHz 3 EXT AC EXT DC 1b 16 Operation Reference Press to turn on or off the currently selected modulation mode AM FM or M OFF appears in the second line of the MODULATION display when modulation is turned off This key also turns on or off the audio output at the MOD INPUT OUTPUT connector when an internal source 400 Hz or 1 kHz is selected The operation of this key is the same as the key on the HP 83300A Remote Interface Press one of these keys to select an internal source for modulating the carrier The selected source is also output at the MOD INPUT OUTPUT port as a 1 Vpk signal into 6000 Press one of the
87. label in electromotive force units Emf is the RF output voltage with no load It is twice the output voltage with a 50 ohm load Press this key at any time while you are entering an amplitude or reference offset value to change the sign of the value Instrument Preset Instrument Preset Note Turn the instrument on while pressing the backspace key to perform an instrument preset The instrument will power up to factory defined settings shown in the following table Save and recall registers are not affected by this operation Turn the instrument on while pressing the memory key to perform a clear memory This function erases all save recall registers sets the HP IB address to 19 and performs an instrument preset where the instrument powers up to factory defined settings shown in the following table This will cause an error message to appear on the display 627 Battery RAM failure memory lost This is normal Operation Reference 1b 7 Instrument Preset 1b 8 Operation Reference Instrument Preset Settings Function Parameter Setting RF Frequency RF Amplitude Fa sate o an sume or ge or rro sm om Attenuator Coming or HP IB 1 ADRS Press to view the instrument s HP IB address setting in the second line of the FREQUENCY display To change the address press and a two digit number For example enter 01 to set the address to
88. light continues to flash or if it does not turn on at all after an arrow key and the key have been pressed refer to Chapter 5b Troubleshooting Information Operation Reference 1b 25 Ic Operation Messages This chapter provides descriptions for both front panel and HP IB operation messages For information about service messages numbered 500 and above refer to Chapter 5c Service Error Messages Front Panel SEQ X SAVE _ _ XXX registers available Operation This message is displayed when the key is pressed to Messages inform you of how many registers are still available If a register is available enter the two digit number of the register you wish to save SEQ X REG _ _ XX has not been saved This message is displayed when an attempt is made to recall a register that has not been saved in the sequence Check to be sure that the appropriate sequence is selected and that you have entered the correct register number SEQ X DEL _ _ Enter number to delete This message is displayed when the key is pressed Enter the number of the memory register you wish to delete When a register is deleted the settings saved in it are erased and the register number is removed from the sequence SEQ X has no registers saved in it This message is displayed when a sequence is selected that has no registers saved in it If you wish to save registers in the sequence set up the instrument press the key and enter a two digit
89. n ROM is contained in the assembly If the failure is still present after replacing the A7 assembly replace the A3 assembly which contains the RAM Service Error Messages 5c 3 5c 4 Service Error Messages 512 Description Cause What To Do 513 Description Cause What To Do 601 Description Cause What To Do 603 Description Cause What To Do Generic path cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM Replace the A3 assembly The A3 assembly has a continuity failure The calibration ROM is on the A3 assembly with the RAM Output tune cal restore failure After detecting a failure in comparing calibration data between RAM and the calibration ROM a data restore was attempted unsuccessfully There is either a failure in writing data to RAM or in reading data from the calibration ROM The calibration ROM can be verified by replacing the A6 assembly The calibration ROM is contained in the assembly If the failure is still present after replacing the A6 assembly replace the A3 assembly which contains the RAM 12 V power supply failure The 12 V diagnostic test point decreased by more than approximately 0 4 V Either the 12 regulator on the A3 mother board has failed o
90. n how to operate the signal generator These examples can be performed without any additional equipment Getting Started If this is the first time you have operated this instrument perform each of the following examples for a quick introduction to general operation After you have completed the examples try operating the instrument s remaining functions on your own If you have trouble or want additional information on a function refer to Chapter 1b Operation Reference If a message is displayed that you do not understand refer to Chapter lc Operation Messages Operation Examples Setting the RF Output Signal Incrementing or Decrementing the RF Output Signal 1 2 3 Using the Memory Registers 4 Offsetting the RF Output from a Reference 5 Holding the Output Attenuator Range toct drw Operation Examples 1a 1 Setting the RF In this example you will set the frequency amplitude and modulation Output Signal level of the RF output signal Setting the Frequency 1 Set the frequency to 100 MHz using the keys shown below the instrument diagram If you make a mistake while entering a value press to correct it FREQUENCY RES MODULATION SSSR AMPLITUDE 100 00000 MHz funct1 drw NN FREQUENCY 0 Setting the Amplitude 2 Set the amplitude to 100 dBm 100 00000 MHz 100 0 dBm funct2 drw 1a 2 Operation Examples Turn on the RF Output 3 Pr
91. ncrement the RF output frequency in 25 kHz steps The increment keys affect the last FUNCTION selected FREQUENCY AMPLITUDE FM AM or amp M incr4 drw Operation Examples 1a 5 00 Using the Memory The memory register examples show you how to create a sequence of Regist ers registers delete a register from that sequence renumber the registers in the sequence and insert a new register in the sequence Up to 10 register sequences can be defined 0 through 9 A sequence can contain up to 100 registers 00 through 99 There are a total of 300 registers available in the instrument The registers can be used in the sequences in any combination such as 10 sequences of 30 registers each or 3 sequences of 100 registers each as long as the total does not exceed 300 registers It is not possible to have all 10 sequences each contain 100 registers as that would be 1000 registers FM 3 00kHz 136 0dBm lkHz OFF RFOFF 100 00000MHz REG 01 SERRO 300 REG TEST2 drw 1a 6 Operation Examples Saving Instrument In this ten step example you will use the memory keys to create Settings in Register sequence containing three registers Each register will contain a Sequences different frequency setting Selecting the Sequence 1 Select sequence 0 If there are registers saved in sequence 0 the message shown in the display below will not appear Note that the steps in this example will cau
92. nd programs the RF amplitude POW is higher than AMPL in the command hierarchy and is separated by a colon The signal generator s RF amplitude will be programmed to 47 dBm OUTP STAT ON This command changes the RF amplitude to an on state The RF amplitude defaults to an off state when the instrument is powered on HP IB Programming 2 5 Table 2 1 Programming Command Statements and Descriptions Amplitude OUTP STAT ON Turns the RF output on OUTP STAT OUTP STAT OFF Turns the RF output off POW AMPL lt value gt lt units gt Sets the amplitude of the RF output to the desired lt value gt and lt units gt lt value gt may be up to 4 digits plus a sign if applicable e g 127 1 or maximum resolution of 1 dB 001 mV 01 UV lt units gt may be DBM MV UV MVEMF UVEMF DBUV DBUVEMF If in reference mode only DB or DBM are allowed Turns automatic attenuator control on this is normally POW ATT AUTO on POW AMPL POW ATT AUTO ON Turns automatic attenuator control off and holds present attenuator setting Sets a reference to the lt value gt in lt units gt as described in setting amplitude Reference state must be on to be active Sets reference to on making all amplitude changes relative to the reference Sets reference to off making all amplitude changes absolute POW ATT AUTO OFF POW REF lt value gt lt units gt POW REF
93. o commands such as return or space When interchanging data the controller polls the display for acknowledgement This means that if the display is disconnected the controller will cease to attempt operations Table 5a 1 Al Front Panel keyboard Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 A3J3 1 A3J3 2 A3J3 3 A3J3 4 A3J3 5 A3J3 6 A3J3 7 Row 1 FREQUENCY INCR MHz A3J3 9 Tan SET dB m Ro 2 AMPLITUDE eS A3J3 ee treq Row 3 REF A3J3 11 SET e freq Row 4 REF rad A3J3 12 ON OFF dBuV freq pa 5 ADRS MOD Es RS pa 13 eee ON OFF Es Hz Row 6 LOCAL 1 EE INT EXT A3J3 14 ner EE DC 1 kHz DC Row 7 pe REF RF ATTN A3J3 15 in pas ON OFF ON OFF HOLD aan ampl Row 8 uv dBuv A3J3 16 ree space a emf emf A2 Power Supply The power supply is a switching power supply producing 4 voltages 5 V 15 V 15 V and 38 V The switching supply will only regulate when connected to a load The power supply receives mains line voltage through the power switch on the front panel and the line module on the rear panel Post regulation on the A3 assembly produces 12 V filtered 5 V and 5 V A3 Motherboard The motherboard contains four functional blocks modulation distribution controller post regulation and diagnostic latching The modulation distribution block produces two level calibrated modulation frequencies 1 kHz and 400 Hz The frequencies are derived by dividing a 200 kHz signal from the A4 reference module by 200 and 250 Th
94. operating status will satisfy most needs for status reporting POWer Status Register NOTE Reverse Power mm Unspecified Amplitude DO 1 UM BR ND ANA NA AAA AAN Ext Mod Level High Ext Mod Level LOW mel Unspecifisd ame NAAA AMAN status drw 2 8 HP IB Programming Unmarked bits in registers do not apply for normal operation status These bits must be masked when querying status See the QUES onable Status Register programming examples POWer Summary Bit MODulation Summary Bit Standard Event Status Register Operation Complete 0 Request Control Query Error Device Dependent Error Execution Error Command Error User Request Power On NOM B ND 0Q DANA ND Figure 2 1 HP 8647A Status Register Model External Modulation Input Level Status External modulation input level status may be queried for high low or input level correct The instrument automatically detects the input level 1 Vpk into 600 ohms for full scale modulation and displays the result on the front panel display but must be queried for HP IB reporting Example Check the Condition of Modulation Input High or Low l OUTPUT 71393 STAT QUES MOD COND 256 ENTER rig Value SH Mod BINAWDC values 1 46 IF Mod 1 THEN PRINT Ext Mod Input Hish 1 Mod BIHAHE values 22 fa cn te 66 IF Mod 2 THEN PRINT Ext Mod Input Low r EMD Line 10 Qu
95. ory Interface This message will be displayed if the cable connecting the instrument to the primary interface is disconnected during the copy process Memory copy was successful This message is displayed when the instrument has successfully copied the memory registers between the instrument and the HP 83301A Memory Interface When this message is displayed the copy process is complete and you can disconnect the memory interface from the instrument HP IB Command Errors 101 102 103 104 105 108 109 111 112 113 Invalid character A syntactic element contains a character which is invalid for that type for example a header containing an ampersand SETUP amp This error might be used in place of errors 121 141 and perhaps some others Syntax error An unrecognized command or data type was encountered For example a string was received when the device does not accept strings Additional information is available over HP IB Invalid separator The parser was expecting a separator and encountered an illegal character For example the semicolon was omitted after a program unit EMC1 CH1 VOLTS5 Data type error The parser recognized a data element different than one allowed For example numeric or string data was expected but block data was encountered GET not allowed A Group Execute Trigger was received within a program message see IEEE 488 2 7 7 Parameter not allo
96. pplied to a phase modulator along with the signal from the divide by n circuitry and then applied to the phase detector The synthesizer assembly contains a calibration ROM that contains factory generated calibration data that is specific to the assembly The output assembly takes the 500 to 1000 MHz signal from the A5 assembly and the 1 GHz LO signal from the A4 assembly to generate the output frequency range of 0 25 to 1000 MHz in three bands The output assembly also handles the filtering AM and amplitude leveling functions The three frequency bands range from 0 25 to 249 MHz 249 to 501 MHz and 501 to 1000 MHz The 0 25 to 250 MHz band is heterodyned from the 1 GHz LO signal and the 500 to 1000 MHz main band signal A7 Attenuator The 250 to 500 MHz signal is derived by dividing the 500 to 1000 MHz main band signal by two Filtering is handled by separate low pass filters for each frequency band AM is done using two separate modulators one for the divide band and one dual output modulator for the main and heterodyne bands The AM signal from the A3 modulation section for both modulators is summed into the ALC loop integrator Amplitude leveling is handled with an ALC loop to lock the level and an amplitude DAC to set the level The error signal from the ALC integrator is sent to either of the two modulators along with the summed AM signal The output assembly contains a calibration ROM that contains factory generated cal
97. r the 15 V supply on the A2 power supply assembly has failed Check the output of both the 15 V and 12 V supplies 12 V power supply failure The 12 V diagnostic test point decreased by more than approximately 0 4 V Either the 12 V regulator on the A3 mother board has failed or the 15 V supply on the A2 power supply assembly has failed Check the output of both the 15 V and 12 V supplies 604 Description Cause What To Do 605 Description Cause What To Do 608 Description Cause What To Do 611 Description Cause What To Do 612 Description Cause What To Do 38 V power supply failure The 38 V diagnostic test point decreased by more than approximately 2 2 V The 38 V supply on the A2 power supply has failed Check the 38 V supply ALC out of lock div het main band The ALC loop is out of lock in the indicated bands Either the A6 output has failed or the signal from the A5 synthesizer has failed or the A4 reference has failed If only the het band has failed it is possible that the A4 reference has failed Check the input to the A6 output from the A5 synthesizer and the A4 reference Synth out of lock div het main band The synthesis loop is out of lock in the indicated bands Either the A5 synthesizer has failed or the signal from the A4 reference has failed Check the input to the A5 synthesizer from the A4 reference 200 kHz reference missing a
98. re is provided without any warranties or support It may be copied or modified so long as it is not reproduced for sale The software is a large program with many compiled subroutines The software must be run under HP BASIC 6 0 using an HP series 200 or 300 computer The memory required for the program is approximately 6 MBytes The HP part number for the software is 08647 10001 5 2 Service ha Theory of Operation Introduction Use the circuit descriptions and the simplified block diagram in this chapter to understand the instrument s operation 1 GHz OUT EE AB OUTPUT gt 10 MHz REF IN Ca 10 MHz REF OUT RF OUT RE OUTPUT AZATTENUATOR OS OUT OF LOCK HP 83300A 83301A bikdlag1 drw Figure 5a 1 Simplified Block Diagram Theory of Operation 5a 1 Overview Al Front Panel 5a 2 Theory of Operation The HP 8647A signal generator covers the frequency range of 0 25 to 1000 MHz in three bands The frequency bands are m 0 25 to 249 MHz m 249 to 501 MHz m 501 to 1000 MHz The output amplitude is from 10 to 136 dBm The HP 8647A supports AM FM and phase modulation The possible sources are m Internal 400 Hz or 1 kHz source m External ac or dc coupled source m Internal 1 kHz plus external dc coupled source The front panel contains two RPGs rotary pulse generator the keyboard and the LCD display The two RPGs one for frequency and one for amplitude are connected directly to the
99. register 01 Register 00 can now be used to save the new settings 10 00000 MHz SEQ 0 REG 01 insseq4 drw Saving a New Register 5 Set the frequency to 8 MHz FREQUENCY EEN MODULATION JET AMPLITUDE 8 00000 MHz 6 Save the settings in register 00 Press to check the new sequence FREQUENCY Ss MODULATION TR AMPLITUDE 8 00000 MHz SEQ 0 REG 00 1a 16 Operation Examples Offsetting the RF In this example you will enter an RF output frequency set it as the Output from a reference value and then offset the RF output frequency 10 MHz Reference below the reference value Setting the Reference 1 Set the frequency to 500 MHz Value FREQUENCY MED MODULATION SMS AMPLITUDE 500 00000 MHz Lo ae 2 Set 500 MHz as the reference frequency The A symbol appears in the display to indicate that the reference mode is selected The output frequency is still 500 MHz FREQUENCY Ss MODULATION apm AMPLITUDE 0 000004 MHz ref2 drw Operation Examples 1a 17 Offsetting the RF 3 Offset the output frequency 10 MHz below the reference Output frequency You can enter in the offset value directly or use the knob or 4 and T keys DOS mm Attention In the reference mode the output frequency equals the reference frequency the displayed offset frequency Turning the Reference Mode Off or On 4 Turn off the reference mode to display the actual output
100. res 2 1 HP 8647A Status Register Model 2 8 3 1 Replacing the Fuse 3 3 3 2 Power Cable and Mains Plug 3 4 5a 1 Simplified Block Diagram 2 5a 1 5b 1 Removing the Fuse Housing 5b 3 8 1 FM Accuracy Equipment Setup 8 3 8 2 FM Distortion Equipment Setup 8 4 8 3 AM Accuracy Equipment Setup 8 6 8 4 AM Distortion Equipment Setup 8 7 8 5 Phase Modulation Distortion Equipment Setup 8 9 8 6 Phase Modulation Distortion Equipment Setup 8 10 8 7 Residual FM Equipment Setup 8 12 8 8 Harmonics Equipment Setup 8 14 8 9 Spurious Equipment Setup 8 15 8 10 DC FM Frequency Error Equipment Setup 8 16 8 11 RF Level Accuracy Equipment Setup 8 17 8 12 CW Frequency Accuracy Equipment Setup 8 18 Tables 2 1 Programming Command Statements and Descriptions 2 6 2 2 Dictionary of Terms 2 13 2 3 IEEE 488 2 Capabilities 2 21 3 1 Voltage Ranges for Nominal Voltage Values 8 2 5a 1 Al Front Panel keyboard 5a 3 6 1 Replaceable Parts 6 2 8 1 HP 8647A Test Record 8 19 8 2 HP 8647A Test Record 8 20 8 3 FM Accuracy Performance
101. rning Caution No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers If this instrument is used in a manner not specified by Hewlett Packard Co the protection provided by the instrument may be impaired For continued protection against fire hazard replace line fuse only with same type and rating 3 A 250 V type F The use of other fuses or material is prohibited Always use the three prong ac power cord supplied with this instrument Failure to ensure adequate earth grounding by not using this cord may cause instrument damage vii How to Use This Guide This guide uses the This represents a key physically located on following convention the instrument Display Text in this font represents FREQUENCY MODULATION and AMPLITUDE displays Documentation This guide contains the information required to operate calibrate and Des cription repair the signal generator to the assembly level Included are the following a quick overview of the signal generator examples of typical operation a reference section that describes all operation features explanations of error messages displayed on the signal generator installation instructions tables of specifications theory of operation of the signal generator m troubleshooting procedures to identify failed assemblies m replaceable part numbers E adjustments required after repair or performance te
102. round the instrument that are read by the controller during power up The reference assembly accepts either an external 10 MHz reference signal to lock the internal 10 MHz TCXO temperature compensated crystal oscillator or uses an optional high stability 10 MHz OCXO oven controlled crystal oscillator The reference assembly outputs two 200 kHz signals a 1 GHz signal and a 10 MHz signal which is routed to the rear panel One of the two 200 kHz signals is routed to the A5 synthesizer and the other to the A3 modulation section The 1 GHz signal is routed to the A6 output assembly The 10 MHz REF OUTPUT rear panel signal is a buffered output from the 10 MHz TCXO or OCXO The 200 kHz signals are derived by dividing the 10 MHz signal by 50 The 1 GHz signal is derived from a 1 GHZ VCO that is phase locked to the 10 MHz signal The reference assembly contains a calibration ROM that contains factory generated calibration data that is specific to the assembly The synthesizer assembly uses a 200 kHz reference signal from the A4 reference assembly and generates a 500 to 1000 MHz signal using a divide by n phase locked loop VCO Frequency and phase modulation are also done in the synthesizer assembly The frequency is modulated both inside and outside of the loop bandwidth FM outside of the loop bandwidth is summed with the integrator error voltage and applied directly to the VCO FM within the loop bandwidth and phase modulation signals are a
103. s The procedures in this chapter test the electrical performance of the signal generator These tests do not require access to the interior of the instrument This chapter contains the following information Required Test A list of all the equipment required to perform Equipment List these tests Performance Tests The performance tests required to verify the signal generator to its specifications Test Records A test record to record the results of the tests is located at the end of this chapter Keep the test record as a master and use a photocopy for each calibration See Chapter 4 Specifications for the specifications for the signal generator 2 02020200 Calibration Cycle This instrument requires periodic verification of performance Under normal use and environmental conditions an instrument should be calibrated every 2 years Normal use is defined to be about 2 000 hours of use per year Performance Tests 8 1 SSCS Required Test Equipment Note 8 2 Performance Tests m HP 8903B Option 051 Audio Analyzer o Distortion Accuracy 1 dB O Residual distortion 80 dB at 80 kHz BW O 30 kHz low pass filter O AC level accuracy 4 O CCITT weighting filter u HP 8902A Measuring Receiver o FM accuracy 2 of reading 1 digit o AM accuracy 2 of reading 1 digit O Frequency accuracy 35 Hz at 1000 MHz includes reference accuracy and counter accuracy O Range 250 kHz to 1000 MHz OD Filters 3
104. se keys to configure the MOD INPUT OUTPUT port as an ac or de coupled input for modulating the carrier Calibrated modulation requires an audio source of 1 Vpk into 6000 For audio source frequencies of less than 10 kHz a HI or LO indicator will appear in the second line of the MODULATION display when the level of the source is not within approximately 5 of 1 Vpk Acceptable Frequency Ranges for an External Audio Source Coupling FM 6M EXT AC 20 Hz to 75 kHz EXT DC DC to 75 kHz AM EXT AC 20 Hz to 25 kHz EXT DC 4 1 kHz EXT DC Note 5 MOD INPUT OUTPUT Modulation Source Press to configure the MOD INPUT OUTPUT port as a DC coupled input for modulating the carrier along with the internal 1 kHz source Refer also to 3 EXT AC EXT DC for further information about operation and acceptable ranges 1 kHz EXT AC 400 Hz EXT DC and 400 Hz EXT AC are available only via HP IB Setting the Modulation Level When modulating with both an internal and external source the level of the external source should not exceed 0 5 V peak or 0 5 Vdc This level will provide one half of the displayed modulation To set modulation to the level you desire set the displayed modulation to two thirds of the desired setting The external source set to 0 5 V peak or 0 5 Vdc will provide the additional one third of the desired setting one half of the instrument s setting For example to set up the modulation for 3
105. se the settings in registers 00 01 and 02 of sequence 0 to be changed FREQUENCY Sm MODULATION Summa AMPLITUDE SEQ 0 has no registers saved in it regseq1 drw Saving Settings in Registers 2 Set the frequency to 10 MHz FREQUENCY MES MODULATION Sn AMPLITUDE 10 00000 MHz SEQ 0 REG regseq2 drw 3 Save the instrument settings in register 00 FREQUENCY MENA MODULATION MU AMPLITUDE 10 00000 MHz SEQ 0 REG 00 regseqs drw 4 Set the frequency setting to 11 MHz Operation Examples 1a 7 FREQUENCY Ss MODULATION REA AMPLITUDE 11 00000 MHz SEQ 0 REG 00 regseq4 drw 5 Save the instrument settings in register 01 FREQUENCY gq MODULATION q AMPLITUDE 11 00000 MHz SEQ 0 REG 01 regseq5 drw 6 Set the frequency to 12 MHz 12 00000 MHz SEQ 0 REG 01 regseq6 drw ja 8 Operation Examples 7 Save the instrument settings in register 02 FREQUENCY EM MODULATION RR AMPLITUDE 12 00000 MHz SEQ 0 REG 02 Checking the Sequence 8 Recall the registers in sequence 0 The 1 and 1 keys recall registers or sequences depending on which key was pressed last REG or SEQ 10 00000 MHz SEQ 0 REG 00 11 00000 MHz SEQ 0 REG 01 12 00000 MHz SEQ 0 REG 02 10 00000 MHz SEQ 0 REG 00 Checking a Different Sequence 9 Select sequence 1 req9 drw Operation Examples 1a 9 10 Step through the reg
106. ssages Messages numbered 500 and above relate to the service self tests provided within the instrument For information about troubleshooting the instrument refer to Chapter 5 Service 1c 8 Operation Messages HP IB Programming Background This signal generator adheres to the IEEE 488 1 1987 IEEE 488 2 1987 and SCPI Version 1992 0 command language In 1987 the IEEE released IEEE 488 2 1987 Codes Formats Protocols and Common Commands for Use with IEEE 488 1 1987 This standard defined the roles of instruments and controllers in a measurement system and a structured scheme for communication In particular IEEE 488 2 described how to send commands to instruments and how to send responses to controllers It defined some frequently used housekeeping commands explicitly but each instrument manufacturer was left with the task of naming any other types of commands and defining their effect IEEE 488 2 specified how certain types of features should be implemented if they were included in an instrument It generally did not specify which features or commands should be implemented for a particular instrument Thus it was possible that two similar instruments could each conform to IEEE 488 2 yet they could have an entirely different command set Standard Commands for Programmable Instruments SCPI is the new instrument command language for controlling instruments that goes beyond IEEE 488 2 to address a wide variety of instrument f
107. st failure m performance tests to test the instrument to specifications viii Contents 1 Operation Quick Overview 1 2 l Power Key x 2 24 gre du de 1 2 2 Display Contrast 1 2 3 Function and Data Keys 1 2 4 Increment Set Keys 1 2 5 KNOBS a Less nes ta wid MU gum Lure 1 2 6 MEMORY sm gs Bote a RE a ie hs 1 3 7 Modulation Source 1 3 la Operation Examples Getting Started la 1 Operation Examples la 1 Setting the RF Output Signal la 2 Setting the Frequency la 2 Setting the Amplitude la 2 Turn on the RF Output 2 0 la 3 Setting the Modulation 2 la 3 Incrementing or Decrementing the RF Output Signal la 4 Preliminary Steps la 4 Using the Knob 0 0 la 4 Using the Increment keys 4 4 la 5 Using the Memory Registers 1a 6 Saving Instrument Settings in Register Sequences la 7 Selecting the Sequence 2 la 7 Saving Settings in Registers la 7 Checking the Sequence 2 la 9 Checking a Different Sequence 1a 9 Deleting a Register from the Sequence la 11 Selecting the Sequence 4 la 11 Deleting a Reg
108. ster Enters the condition of the POWer register into the variable Value Uses the HP Basic command BINAND to check the contents of bit 1 in Value If bit 1 is high Pow spec will equal 2 Checks if Pow spec equals 2 and then prints that the amplitude is in an unspecified range HP 8647A SCPI Command Reference Table 2 2 Dictionary of Terms Indicates an ASCII representation of a number if required in the command statement The number must be an integer Dome Dei Indicates an ASCII representation of a number if required in the command statement The number may be an integer or floating point and may include a decimal exponent nrf stands for flexible numeric representation For further information refer to the IEEE 488 2 standard lt NR1 gt and may not include decimal points For further information refer to the IEEE 488 2 standard lt AM term gt Indicates that a PCT termination is required in the command statement If no termination is specified a PCT value is assumed lt freq term gt Indicates that a HZ KHZ GHZ or MHZ termination is required in the command statement IF the command is not terminated then HZ is assumed lt angle term gt Indicates that a RAD termination is required in the command statement If no termination is specified then RAD is assumed lt ampl term gt Indicates that a DB D
109. t synth The A5 module indicates that the 200 kHz reference signal from the A4 module is not being detected Either the A4 module has failed to output the 200 kHz reference signal or the A5 module is failing to detect the signal Check the 200 kHz reference output of the A4 module at the input to the A5 module Reference out of lock at 10 MHz The A4 module indicates that the 10 MHz reference VCO is out of lock Either the A4 module has failed or a bad external reference is connected Disconnect any external reference and power up the instrument again or replace the A4 module if the error is still present with no external reference Service Error Messages 5c 5 5c 6 Service Error Messages 613 Description Cause What To Do 614 Description Cause What To Do 615 Description Cause What To Do 616 Description Cause What to Do 617 Description Cause What To Do Reference out of lock at 1 GHz The A4 module indicates that the 1 GHz reference is out of lock Either the A4 module has failed or a bad external reference is connected Replace the A4 module 400 Hz modulation source failed The A3 board indicates that the 400 Hz modulation source is not present Either the 200 kHz reference signal from the A4 module has failed or the A3 has failed Check the 200 kHz reference output of the A4 module at the input to the A3 board 1 kHz modulation source failed The A3 board indicates that
110. ted Pair With 7 NRFD P O Twisted Pair With 6 DAV REN EOI DIO8 DIO4 DIO DIO3 DIO6 DIO2 DIOS DIO1 Isometric ee Thread M3 5 x 0 6 24 Pin Micro Ribbon Series 57 Connector Logic Levels The Hewlett Packard Interface Bus logic levels are TTL compatible that is the true 1 state is 0 0 Vdc to 0 4 Vdc and the false state 0 is 2 5 Vdc to 5 Vdc Mating Connector HP 1251 0293 Amphenol 57 30240 Mating G Availat HP 10833A 1 meter 3 3 ft HP 1080338 2 meters 6 8 tt HP 10833C 4 meters 13 2 ft HP 10833D 0 5 meters 1 6 ft Cabling Restricti 1 A Hewlett Packard Interface Bus system may contain no more than 2 meters 6 6 ft of connecting cable per instrument 2 The maximum accumlative length of connecting cable for any Hewett Packard Interface Bus system is 20 meters 65 5 ft m manuals boiler npibeon1 drw 2 22 HP 1B Programming Installation Unpacking Your Signal Generator Warning Caution 1 Unpack the contents of the shipping container 2 Inspect the shipping container for damage If the shipping container is damaged or the cushioning material inside is stressed keep them until you have checked the instrument for proper operation 3 Inspect the signal generator to ensure that it was not damaged during shipment If mechanical damage or defects have occurred notify the carrier as well as the Hewlett Packard office Keep the shipping materials for inspection by the carrier
111. the Signal Generator Connecting to Other Instruments Storing the Signal Generator Shipping the Signal Generator Specifications Frequency Specifications Internal Reference Oscillator OUEDUE seas pat ouh Ron AN a Spectral Purity oe poe het Bo sedento Ea M Gers Frequency Modulation Phase Modulation Amplitude Modulation 4 Modulation Source 0 Remote Programming Environmental General o aus Bo el ek BL ttes A A e Regulatory Information ISO 9002 Compliant 4 Statement of Compliance 2 2 2 Noise Declaration Service Shipping Your Instrument Back to Hewlett Packard Operation Verification Software Theory of Operation Introduction ee ee Overview La ER den D MAS HAL en ad AL Front Panel ss Soe Au te Coy UNE SARL A2 Power Supply A3 Motherboard A4 Reference A5 Sig Gen Synth AG Output ame cg minas e he Sue Le ee er ae AT Attenuator 5 sa en wee a Lx Troubleshooting Information Introduction srs a SWS ob Do es a aS Troubleshooting Checklist
112. through 99 to save the current operating settings in a memory register All front panel settings except the knob digit positions and the HP IB address will be saved in the register When you press the key a message is displayed to tell you the total number of registers still available When you save a register it is assigned to the currently selected sequence The number of the selected sequence appears in the second line of the FREQUENCY display You can only recall a register when the sequence it is assigned to is selected Refer to 4 SEQ for further information about register sequences The instrument does not have a copy function for saving registers from one sequence to another Operation Reference 1b 11 Memory 2 REG 3 Register Recall Arrows 1b 12 Operation Reference Press and a register number 00 through 99 to recall the operating settings saved in that register The number of the last register recalled appears in the display along with the number of the currently selected sequence You can only recall registers from the currently selected sequence To recall a register from another sequence you must first select the sequence using the key The recall and 7 keys can be used to select sequences or recall registers The last key pressed SEQ or REG determines which field is affected by the arrow keys Refer to 4 SEQ for further information about register sequences Memory
113. trument in heavy paper or plastic 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 millimeter layer 3 to 4 inches around all sides of the instrument to provide a firm cushion and to prevent movement in the container Protect the front panel with cardboard 4 Seal the shipping container securely 5 Mark the shipping container FRAGILE to assure careful handling 3 6 Installation Specifications This chapter contains specifications and supplemental characteristics for the HP 8647A signal generator m Specifications describe the instrument s warranted performance over the 0 to 50 temperature range and apply after a 30 minute warm up unless otherwise noted All performance below a carrier frequency of 250 kHz is typical Supplemental characteristics shown in italics are intended to provide information useful in estimating instrument capability in your application by describing typical but non warranted performance Specifications 4 1 Frequency Specifications Range 250 kHz to 1000 MHz Resolution 1 Hz Display 10 Hz Accuracy Typically 8x1076 x carrier frequency in Hz 1 5x107 6 x carrier frequency for Option 1E5 After one hour warm up and within one year of calibration Switching Speed lt 120 ms Internal Reference Oscillator Accuracy and stability calibration and adjustment
114. ument power up Assists user in locating instrument errors and locating faulty module 300 storage registers with sequence and register number displayed Up to 10 sequences are available with 30 registers each 7 kg 15 lbs net 9 kg 20 lbs shipping 165H x 330W x 333D mm 6 5H x 13W x 13 2D in Storage Registers Weight Dimensions 4 6 Specifications High stability timebase Rack Kit part number 08647 61020 Delete manual Extra manual includes service information Three year warranty Translated Operating Manuals Option ABO Chinese for Taiwan part number 08647 90010 Option AB1 Korean part number 08647 90011 Option AB2 Chinese for PRC part number 08647 90012 Option ABE Spanish part number 08647 90013 Option ABJ Japanese part number 08647 90016 Accessories Transit Case Part number 5960 2229 Remote Interface HP 83300A Memory Interface HP 83301A Specifications 4 7 Regulatory Information ISO 9002 Compliant Statement of Compliance Noise Declaration 4 8 Specifications The HP 8647A signal generators are manufactured in an ISO 9002 registered facility in concurrence with Hewlett Packard s commitment to quality This instrument has been designed and tested in accordance with IEC Publication 348 Safety Requirements for Electronic Measuring Apparatus and has been supplied in a safe condition The instruction documentation contains information and warnings which m
115. unctions in a standard manner SCPI promotes consistency from the remote programming standpoint between instruments of the same class and between instruments with the same functional capability HP IB Programming 2 1 Programming Guidelines HP IB Definition What is Programmable HP IB Address Error Messages Programming Language Query Advanced Programming HP IB stands for Hewlett Packard Interface Bus and is often referred to as the bus It is Hewlett Packard s implementation of the IEEE 488 1 1987 and the IEEE 488 2 1987 Standard Digital Interface for Programmable Instrumentation Al functions are programmable except the front panel power key knobs memory keys increment set key arrow keys frequency reference keys and the rear panel display contrast control The HP IB Address for the signal generator is preset to 19 It may be changed to any address between 00 and 30 by pressing and the desired two digit number The HP IB programming error messages are described in Chapter ic Operation Messages Although many system controllers and programming software languages are compatible with this instrument all examples and references in this manual assume the use of an HP controller utilizing the HP BASIC programming language Most instrument settings may be queried via HP IB The data returned from the query will vary from a yes no 1 0 to the actual setting depending on the function See Table 2 1
116. ust be followed by the user to ensure safe operation and to maintain the instrument in a safe condition Notice for Germany Noise Declaration LpA lt 70 dB am Arbeitsplatz operator position normaler Betrieb normal position nach DIN 45635 T 19 per ISO 7779 Service Warning Warning This chapter provides the procedures to troubleshoot your instrument to the assembly level In addition to this introductory information which includes shipping instructions and an overview of the operation verification software this chapter consists of the following three major sections m Chapter 5a provides the theory of operation for each major assembly and a simplified block diagram to describe the instrument s operation a Chapter 5b provides troubleshooting information consisting of a troubleshooting checklist fuse replacement instructions a diagram of modulation test points and power supply LEDs a power supply distribution diagram and an instrument block diagram m Chapter 5c lists the service error messages and gives a description of the error and possible causes and resolutions These servicing instructions are for use by qualified personnel only To avoid electrical shock do not perform any servicing unless you are qualified to do so This is a Safety Class 1 Product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a prot
117. wed More parameters were received than expected for the header For example the EMC common command only accepts one parameter so receiving EMCO 1 is not allowed Missing parameter Fewer parameters were received than required for the header For example the EMC common command requires one parameter so receiving EMC is not allowed Header separator error A character which is not a legal header separator was encountered while parsing the header For example no white space followed the header thus GMC MACRO is in error Program mnemonic too long The header contains more than twelve characters see IEEE 488 2 7 6 1 4 1 Undefined header The header is syntactically correct but it is undefined for this specific device For example XYZ is not defined for any device Operation Messages 1c 5 1c 6 Operation Messages 121 123 124 128 131 134 141 144 148 158 168 178 Invalid character in number An invalid character for the data type being parsed was encountered For example an alpha in a decimal numeric or a 9 in octal data Exponent too large The magnitude of the exponent was larger than 32000 see IEEE 488 2 7 7 2 4 1 Too many digits The mantissa of a decimal numeric data element contained more than 255 digits excluding leader zeros see IEEE 488 2 7 7 2 4 1 Numeric data not allowed A legal numeric data element was received but the devi
118. when is on and the amplitude is set to a level that exceeds the vernier range limits by greater than 5 dBm Exceeding the 10 dB vernier range of an attenuator hold setting causes the output level accuracy to degrade For information about the vernier ranges and limits refer to Atten Hold in Chapter 1b Operation Reference No external dc coupling for AM This message is displayed when AM is selected and or is also selected DC coupling of an external source is not possible for AM If you press you will actually get 1 kHz and external ac Or select coupling for AM Additional internal plus external modulation capabilities such as 1 kHz EXT AC are available through HP IB control of the instrument refer to Chapter 2 HP IB Programming AM unspecified above 4 dBm This message is displayed when AM is selected and amplitude is set to greater than 4 dBm To insure that AM will meet its specified performance reduce the amplitude setting to 4 dBm or less AM unspecified at or below 1 5 MHz This is caused when AM is selected and RF frequency is set to 1 5 MHz or less To insure that AM will meet its specified performance increase the RF frequency setting Help messages off This message is displayed when the instrument is powered up and the rear panel help switch has been set to disable the following error messages 001 002 004 005 006 007 008 010 011 012 013 014 The second switch position next to the

HP / Agilent 8647A Op & Service Manual

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HP / Agilent 8647A Op &amp; Service Manual

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HP / Agilent 8647A Op & Service Manual