HP 8654A User's Manual
Contents
1. 1 26 HP Model 11507A Output Termination May be used to match the Signal Generator s 50 ohm output to high or low impedance circuits 5 ohms minimum at frequencies to 65 MHz Also may be used as a dummy antenna for receiver measurements 1 27 HP Model 11687A 50 to 75 ohm Adapter May be used to match the 50 ohm Signal Gener ator output to a 75 ohm load Calibrated output in volts 1 28 HP Model 11690A Frequency Doubler Ex tends the usable frequency range of signal sources to 1 GHz Typical conversion loss is 12 dB 1 29 HP Model 10514A Double Balanced Mixer May be used as a current controlled attenuator amplitude pulse or square wave modulator or phase detector 1 30 Transit Case Protects the 8654A from dam age while transporting it from location to location Meets the requirements of MIL C 4150 HP Part Number 9211 1895 1 31 RECOMMENDED TEST EQUIPMENT 1 82 The equipment recommended for perfor mance testing adjustments and troubleshooting is listed in Table 1 2 Only equipment that meets or exceeds the critical specifications should be usedi in place of that shown in the table Model 8654A General Information Table 1 1 Specifications 1 of 2 8654A SPECIFICATIONS Specifications apply from 10 520 MHz for output power lt 10 dBm and over the top 10 dB of output level vernier range unless otherwise specified FREQUENCY CHARACTERISTICS Range 10 to 520 MHz in 6 bands Stability2. Figure 3 4 Operator s Checks 1 of 2 3 5 Operation Model 8654A OPERATOR S CHECKS Typical AM Envelope Typical FM Display with CW Display for Comparison Set the INTERNAL MODULATION switch to 400 Hz verify the AM envelope period is 2 5 ms Set the AM MODULATION switch to OFF and set the FM MODULATION switch to INT Set the Oscilloscope time base trigger to internal Rotate the LEVEL control cw Verify that the oscilloscope shows the typical FM display Increasing the RF output frequency will increase the FM deviation shown by the oscilloscope Connect the 8654A AUX OUTPUT to the selon np vertical input and verify that a 10 0 MHz signal of gt 0 3 Vp p is displayed i Figure 3 4 Operator s Checks 2 of 2 3 6 Model 8654A OPERATING INSTRUCTIONS AMNIMTR AION TURN ON Verify that the power transformer primary is matched to the line voltage See Line Voltage Selection in Section II Check the fuse which is contained in the Power Module Assembly for the correct rating The voltage and amperage are given in a table on the Power Module Assembly below the window If necessary change the fuse Couple the power cable to the power outlet and Power Module receptacles Press the LINE switch and release The switch should remain in the lamp within the plastic lens should be illuminated and the cursor on the curved portion of the switch should indicate ON NOTE To ensure the 8654A wil
3. 10 18 6 MHz 35 66 MHz 130 250 MHz Time lt 40 ppm 5 minutes 1 hour after turn on and 15 minutes after frequency change 18 6 35 MHz 66 130 MHz 250 520 MHz f i Line Voltage lt 1 ppm for 5 to 10 change from nominal line voltage Accuracy 2 after 1 hour warmup Level Change lt i ppm for a 10 dB output level change Settability Easily settable to within 1 ppm of the Load lt 1 ppm with any passive load change for desired frequency with an external indicator power settings lt 3 dBm SPECTRAL PURITY Harmonic Distortion gt 20 dB below carrier 10 520 MHz below carrier in a 50 Hz to 15 kHz post detection gt 25 dB below carrier 18 6 130 MHz noise bandwidth Subharmonics and Non harmonic Spurious excluding line related none measurable Residual FM averaged rms deviation lt 0 5 ppm in a Residual AM averaged rms gt 70 dB below carrier in a 0 3 3 kHz post detection noise bandwidth lt 1 ppm 0 3 3 kHz post detection noise bandwidth gt 60 dB ina 50 Hz to 15 kHz post detection noise bandwidth NOTE 1 Measured with noise level lt 60 dB relative to 2 x 10 ubar typical production test environment OUTPUT CHARACTERISTICS Range 10 dB steps and a 13 dB vernier provide power Level Flatness 1 dB referenced to the output at settings from 10 dBm to 130 dBm 0 7 V to 50 MHz for output levels gt 7 dBm 0 07 KV into 509 Impedance 500 ac coupled 75 Vde maximum VSWR lt 1 3
4. Set the AM MODULATION switch to EXT l 0 the external generator output to a minimum connect the output to the AM INPUT sack NOTES 1 The input impedance of the AM INPUT is 600 ohms 2 Voltage levels more positive than 2 Vde or more negative than 2 Vde at the AM INPUT jack should be avoided m Set the external signal modulating rate 20 kHz maximum Figure 3 5 Operating Instructions 2 of 3 3 8 Model 8654A Operation OPERATING INSTRUCTIONS n Press the AM MTR switch o and increase the external generator output until the meter indicates the desired modulation depth NOTES 1 Amplitude modulation is not recommended when the OUTPUT LEVEL control is set to 10 dBm If AM is necessary monitor the RF output with an oscilloscope verify that the distortion is minimal Frequency modulation is permissible 2 The modulation meter responds to the positive peak of the modulation signal If the modulation signal waveform is asymmetrical or if it has a dc component the meter reading will be in error FM MODULATION INTERNAL o Set the FM MODULATION switch to INT p Select 400 or 1000 Hz internal modulating rate with the INTERNAL MODULATION frequency switch q The FM peak deviation is set by the LEVEL control D FM MODULATION EXTERNAL r Set the FM MODULATION switch to EXT s Set the external generator output level to a minimum Connect the generator to the FM INPUT jack p CAUTION Damage
5. 1 on 0 1 V range or lower Level Accuracy Add 0 5 Using Top 10 dB of Vernier Range Using Full Vernier Range el ao ee ae Ea Ea 57t0 97 97 to 127 10 to 130 dBm E as Indicated on Level Meter Note Level Accuracy error consists of allowances for meter accuracy detector linearity temperature flatness attenuator accuracy and twice the measurement error All but the attenuator accuracy and the measurement Total Accuracy dB error can be calibrated out with a power meter at a fixed frequency and a fixed vernier setting Auxiliary RF Output nominally 7 dBm 100 mV MIL I 6181D Furthermore with an output level lt 0 01 V less than 0 5 uV is induced in a 2 turn 1 inch Leakage with all RF outputs terminated properly diameter loop l inch away from any surface and Leakage limits are below those specified in measured into a 5022 receiver 1 3 General Information Model 8654A Table 1 1 Specifications 2 of 2 MODULATION CHARACTERISTICS Amplitude Modulation Specifications apply for output p power lt 3 dBm Depth 0 to 90 l Modulation Rate Internal 400 amp 1000 Hz 10 External 3 dB bandwidth de coupled to gt 20 kHz External AM Sensitivity 0 10 0 01 AM mV pk into 60082 at 400 and 1000 Hz rates Indicated AM Accuracy 5 of reading 5 of full scale for modulation rates of 400 and 1000 Hz Peak Incidental Frequency Deviation 30 AM less
6. or more negative than 20V may damage 8654A internal circuitry NOTES 1 The FM sensitivity accuracy is typically 25 therefore the 1 67 Vpk drive signal will normally produce a peak carrier deviation between 75 125 kHz 2 The detected FM signal distortion is dependent on FM drive voltage and may be determined by the following equation FM Distortion 2 Vg for Vg lt 10 Vpk Figure 3 6 Calculating FM Drive Voltage 3 10 Model 8654A FM Sensitivity kHz pk Vpk Operation RE Le ED Ie ER Dei E A He fA LL HE BEE DD SE A AA aR HH HIST EEE aes Bi er ana mar A ARVD Ht N a Ai PLT AAA Ci Reeth Se A ae ae eS ED Se A HH L A MEMLERNE HH R f 10 20 1000 Carrier Frequency MHz Figure 3 7 FM Sensitivity 3 11 Operation Model 8654A PULSE MODULATION Pulse Modulating the 8654A may be accomplished in the following manner a Set the 8654A FREQUENCY RANGE and TUNE controls to the desired frequency the AM and FM MODULATION controls to OFF b Set the 8654A OUTPUT LEVEL and VERNIER controls to the desired output level This will be the output level during pulse on time c Connect the Pulse Generator to the AM INPUT jack d Set the Pulse Generator controls to produce a pulse on time voltage of 0 0 Vde and an off time voltage of 1 5 Vdc Set other pertinent Pulse Generator controls Voltages applied to the AM INPUT jack which are more posit
7. to the 8654A internal circuitry may occur if inputs more positive than 15V or more negative than 20V are coupled to the FM INPUT jack NOTE The FM INPUT impedance is 600 ohms t Set the external modulating rate 25 kHz maximum u Figure 3 5 shows how to find the input from the test generator that will produce the desired peak deviation of the carrier frequency The FM drive voltage is measured at the FM INPUT jack SIMULTANEOUS AM AND FM MODULATION v If the desired AM frequency is 400 or 1000 Hz follow the instructions given for AM MODULATION INTERNAL and FM MODULATION EXTERNAL Otherwise follow the procedures AM MODULATION EXTERNAL and FM MODULATION EXTERNAL Figure 3 5 Operating Instructions 3 of 3 Operation Model 8654A CALCULATING FM DRIVE VOLTAGE The following procedure explains the method for calculating FM drive voltage Vg Desired Peak Deviation kHz pk Va d FM Sensitivity peak deviation kHz pk Vpk a From Figure 3 7 find the FM sensitivity for the carrier frequency desired Enter the value in the formula b Enter the desired peak frequency deviation c Calculate the FM drive voltage Vg Example Desired carrier frequency 00002 102 1 MHz Desired peak frequency deviation 100 kHz pk 200 kHz bandwidth From Figure 3 7 the FM sensitivity for 102 1 MHz is 60 kHz pk Vpk 100 Va Vpk 60 Va 1 67 Vpk CAUTION Input voltages more positive than 15V
8. 9 Rack Adapter Frames Hewlett Packard adapter frames are an economical means of rack mounting instruments that are narrower than full rack width A set of spacer clamps supplied with each adapter frame permits instruments of differ ent dimensions to be combined and rack mounted as a unit Accessory blanks are available for filling unused spaces 2 20 Combining Cases Model 1051A and 1052A Combining Cases are metal enclosures that allow combinations of third or half rackwidth instru ments to be assembled for use on a workbench or for mounting in a rack of standard 19 inch spacing Each case includes a set of partitions for position ing and retaining instruments and a rack mounting kit No tools are required for installing the par titions For bench use the cases have the same convenience features as full rackwidth instruments i e foldaway tilt stands and specially designed feet for easier instrument stacking Accessories available for the combining cases include fan kits blank filler panels and snap on full width control panel covers 2 21 STORAGE AND SHIPMENT 2 22 Environment 2 23 The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment 2 2 Model 8654A Temperature 40 to 75 C Humidity lt 95 relative Altitude Sale ae lt 25 000 feet 2 24 Packaging 2 25 Original Packaging Containers and mate
9. ANEL STEP H RE OUTPUT STEP B AM OUTPUT OPERATOR S CHECKS G BNC TEE m 502 LOAD Operation OSCILLOSCOPE VERTICAL INPUT EXTERNAL TRIGGER INPUT Verify that the power transformer primary is matched to the line voltage and that the correct fuse is installed within the rear panel Power Module Assembly See Line Voltage Selection in Section H Couple the power cable to the power outlet and Power Module receptacles When the LINE switch is set to ON the lamp within the switch lens should be illuminated Set the 8654A controls as follows FREQUENCY RANGE 0 02 0 0006 10 18 6 MHz FREQUENCY TUNE 200 2k ee a0 2a wa 10 0 MHz OUTPUT LEVEL ys Ga Aw a 0 1 Vrms VERNIER lt 4 03 2 2 40 eae full scale meter reading 0 1 Vrms AM MODULATION 0 0 0 02 00 0000 4 0 4 OFF FM MODULATION 36 35 od a 4 Pew ae SOR A we eS OFF INTERNAL MODULATION 0 0 0 4 1000 Hz Connect the equipment as shown above and verify that the 10 0 MHz signal has an output level of 0 3 Vp p The oscilloscope must have a bandwidth of gt 10 MHz to perform these checks Set the 8654A AM MODULATION switch to INT set the oscilloscope time base trigger to external Press the AM MTR switch and rotate the LEVEL control cw until the meter indicates 50 modulation depth 5 Verify that the AM envelope display shows a peak to valley voltage difference of about 0 15 V with a period of 1 0 ms
10. F PSE 2 dBm add the levels together and Vrms the OUTPUT LEVEL control shows the full scale voltage and the meter indicates the output volt age Mechanical Zeroing Adjustment Screwdriver ad justment used to align the meter indicator on zero O OUTPUT LEVEL Control Selects output range as shown on control skirt 10 to 120 dBm 1V to 0 3 uV RF OUTPUT Connector Type N female coaxial Output level 10 to 130 dBm 0 7 Vrms to 0 07 Vrms across a 5002 load AM is restricted in the 10 dBm range VERNIER RF output continuously variable with in a 13 dB range as indicated by the meter Figure 3 2 Front Panel Controls Connectors and Indicators 1 of 2 3 2 Model 86594A Uperation FRONT PANEL FEATURES FM OUTPUT INPUT Jack Open circuit output present during internal modulation is 5 Vrms output impedance is approximately 10 kQ For external FM an audio tone must be coupled to the jack input impedance is approximately 60022 Voltage levels more positive than 15V or more negative than 20V may damage 8654A intemal circuitry if coupled to the FM INPUT jack an ren FM MODULATION Switch Selects internal INT or external EXT frequency modulation or OFF AM MODULATION Switch Selects internal INT or extemal EXT amplitude modulation or OFF NOTE A mechanical interlock prevents simul taneous internal amplitude and frequency modulation neni AM OUTP
11. HP 8654A OPERATING INFORMATION SIGNAL GENERATOR 8654A HEWLETT w PACKARD OCTOBER 1973 Dong Vvo98 dH General Information MODEL 8654A AM Re POWER CABLE NOTE See ACCESSORIES SUPPLIED in Section for part number information Figure 1 1 HP Model 8654A and Accessories Supplied SREP Model 8654A Model 8654A General Information SECTION I GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This manual contains information pertaining to installation operation testing adjustment and maintenance of the Model 8654A Signal Gener ator 1 3 The information in this manual is divided into sections as shown below a Section I GENERAL INFORMATION instrument identification description accessories specifications and other basic information b Section H INSTALLATION incoming inspection power requirements mounting pack ing and shipping of the instrument c Section HI OPERATION provides infor mation relative to operating the instrument d Section IV PERFORMANCE TESTS provides information required to ascertain that the instrument is performing in accordance with pub lished specifications e Section V ADJUSTMENTS provides in formation required to properly adjust and align the instrument after repairs are made f Section VI REPLACEABLE PARTS pro vides ordering information for replaceable parts and assemblies g Section VI MANUAL CHANGES con tains
12. UT INPUT Jack Open circuit output present during internal modulation is 5 Vrms output impedance 10 kh2 For external AM an audio tone must be coupled to the jack input impedance 60082 Voltage levels more positive than 8V or more negative than 8V may damage internal circuitry of the 8654A when coupled to the AM INPUT jack INTERNAL MODULATION Frequency Switch Selects 400 or 1000 Hz internal modulation signal rate i LEVEL Control Sets AM depth or FM deviation in the internal modulation mode LINE Switch Controls primary power Illumin ated when the instrument is ON l Figure 3 2 Front Panel Controls Connectors and Indicators 2 of 2 Operation Model 8654A REAR PANEL FEATURES FRKE Oya RINE CHORIN 2 4 AUX OUTPUT Connector Output is RF signal 10 a Fuse 1 4 Amp for 100 120 Vac 1 8 Amp for to 520 MHz at gt 7 dBm fixed level into a 5002 220 240 Vac load Power Module Assembly FUSE PULL Handle Mechanical interlock to guarantee fuse has been removed before Line c Receptacle For Power Cable coupling to available Voltage Selection Card can be removed line voltage l O Line Voltage Selection Card Matches transformer Window Safety interlock fuse cannot be removed primary to available line voltage while power cable is coupled to the 8654A mian Figure 3 3 Rear Panel Controls Connectors and Indicators 3 4 Model 8654A MODEL 8654A AUX OUTPUT REAR P
13. ating signal may be selected from an internal or external source 1 15 ACCESSORIES SUPPLIED 1 16 The accessories supplied with the 8654A are a A 1 8 amp fuse HP 2110 0027 for use when the available line voitage is 220 240 Vac b A power cable Refer to Power Cables in Section H for HP Part Number 1 17 EQUIPMENT AVAILABLE 1 18 Information may be obtained on the acces sories and equipment or they may be ordered by contacting your nearest Hewlett Packard office Refer to the HP model number 1 19 Complementary Equipment 1 20 HP Model 204C D Oscillators Fully com patible for external modulation of the Signal Generator 1 21 HP Model 8447C Amplifier Suitable for increasing the output level of the 8654A Typical gain is 30 dB 1 22 HP Model 8447E Amplifier Suitable for increasing the output level of the 8654A Typical gain is 22 dB much wider frequency range than the HP 8447C 1 2 Model 8654A 1 23 HP Model 5300A 5303A Electronic Count er May be used to monitor the output frequency of the Signal Generator 1 24 Accessories 1 25 HP Model 11509A Fuseholder Protects the Signal Generator against accidental burnout of output circuits during transceiver testing If the transceiver is accidentally switched to transmit the fuse is burned out and the generator output port is isolated from the high level RF energy The fuseholder does not limit the usable output of the generator
14. backdating information for earlier equipment configurations h Section VII SERVICE includes infor mation required to troubleshoot and repair the instrument 1 4 Figure 1 1 shows the Hewlett Packard Model 8654A Signal Generator with accessories supplied Refer to ACCESSORIES SUPPLIED in Section I for HP Part Numbers 1 5 Packaged with this manual is an Operating Information Supplement This is simply a copy of the first three sections of this manual This supplement should stay with the instrument for use by the operator Also included with the manual is an overall schematic diagram Additional copies of both the Operating Information supplement and the Overall Schematic Diagram may be ordered separately through your nearest Hewlett Packard office The part numbers are listed on the title page of this manual 1 6 On the title page of this manual below the manual part number is a Microfiche part num ber This number may be used to order 4x6 inch microfilm transparencies of the manual Each microfiche contains up to 60 photo duplicates of the manual pages The microfiche package also includes the latest Manual Changes supplements as well as all pertinent Service Notes 1 7 Instrument specifications are listed in Table 1 1 These specifications are the performance standards or limits against which the instrument may be tested 1 8 INSTRUMENTS COVERED BY MANUAL 1 9 This instrument has a two part serial number Th
15. e first four digits and the letter comprise the serial number prefix The last five digits form the _ sequential suffix that is unique to each instrument 1 10 An instrument manufactured after the print ing of this manual may have a serial prefix that is not listed on the title page This unlisted serial prefix indicates that the instrument is different from those documented in this manual The manual for this instrument is supplied with a yellow Manual Changes supplement that contains change information that documents the differ ences 1 11 in addition to change information the sup plement may contain information for correcting errors in the manual To keep this manual as current and accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement The supple ment for this manual is keyed to this manual s print date and part number both of which appear on the title page Complimentary copies of the supplement are available from Hewlett Packard 1 1 General Information 1 12 For information concerning a serial number prefix not listed on the title page or in the Manual Changes supplement contact your nearest Hewlett Packard office 1 13 DESCRIPTION 1 14 The 8654A is designed to develop a sinu soidal RF output signal from 10 to 520 MHz at power levels of 10 to 130 dBm into a 50 ohm load Amplitude and or frequency modulated out puts are obtainable the modul
16. e is located on the rear panel within the power module assembly Figure 2 1 steps 1 and 3 explain how to remove and install the fuse The fuses may be ordered under HP Part Numbers 2110 0004 1 4 A for 100 120 Vac operation 2110 0027 1 8 A for 220 240 Vac operation a 3 19 Line Switch Lamp Replacement The lamp is contained in the white plastic lens which doubles for the pushbutton on the LINE switch When the instrument is ON the lamp should be illuminated 3 20 Figure 3 1 shows the method of removing and installing the lamp A replacement lamp DS1 may be ordered under HP Part Number 2140 0244 3 1 Operation Model 8654A FRONT PANEL FEATURES vibes a _ INTERNAL A GUTEUT AM _ BOOK FKH gt LIDS mia ey FREQUENCY RANGE Control Selects the fre quency band as indicated on the control skirt 2 Frequency Scale Shows the range of frequeneies selected by the FREQUENCY RANGE control amp Cursor Indicates the output frequency con trolled by FREQUENCY TUNE controls FREQUENCY TUNE Control Tunes to the de sired output frequency within the selected band Includes mechanical fine tune for greater tuning resolution AM MTR 0 100 When the switch is pressed the meter indicates amplitude modulation depth in percent read top scale X10 Meter In conjunction with the OUTPUT LEVEL control the meter indicates the RF Output level in een MODULATION Somer OUTPUT LEPEL EM aeee EE
17. ect fuse rating for the line voltage is shown beneath the window on the Power Module Assembly More infor mation about the fuses is given in Section I ACCESSORIES SUPPLIED and in the Replaceable Parts table in Section VI 2 12 Power Cable 2 13 In accordance with intemational safety standards this instrument is equipped with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds the instrument cabinet The type of power cable plug shipped with each instrument depends on the country of destination Refer to Figure 2 2 for the part numbers of the power cable plugs available WARNING The protection provided by grounding the instrument cabinet may be lost if any power cable other than the three pronged type supplied is used to couple the ac line voltage to the instrument 2 14 Operating Environment 2 15 The operating environment should be within the following limitations Temperature 0 0 to 55 C Humidity un pa ete irk ke ee ad lt 95 relative Altitude 2 2 22 2 et lt 15 000 feet 2 16 Bench Operation 2 17 The instrument cabinet has plastic feet and foldaway tilt stands for convenience in bench 2 1 Installation operation The plastic feet are shaped to ensure self aligning of the instruments when stacked han die must be removed The tilt stands raise the front of the instrument for easier viewing of the control panel 2 18 Rack Mounting 2 1
18. en checked mechanically and electrically The contents of the shipment are shown in Figure 1 1 and the procedures for checking electrical performance are given in Sec tion IV If the contents are incomplete if there is mechanical damage or defects or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for the carrier s inspection The HP office will arrange for repair or replacement without waiting for claim settlements 2 5 PREPARATION FOR USE 2 6 Meter Zeroing 2 7 With the power off the meter s pointer should be positioned directly over zero If the pointer is not on zero insert a screwdriver into the adjustment screw beneath meter and align the pointer with zero on the meter scale 2 8 Power Requirements 2 9 The 8654A Signal Generator requires a power source of 100 120 220 or 240 Vac 5 10 48 to 440 Hz single phase Power consumption is less than 30 VA 2 10 Line Voltage Selection 2 11 Figure 2 1 provides instructions for line voltage and fuse selection The line voltage selec tion card and the proper fuse are factory installed for 120 Vac operation To prevent damage to the instrument make the line voltage selection before connecting the power cable NOTE The corr
19. ive than 8 Vdc or more negative than 8 Vde may damage internal circuitry of the 8654A 0 Vde enn neem On time Voltage 1 5 Vide mn JS IL Lo f time Voltage NOTES 1 The pulse on time voltage must be 0 0 Vdc or the output level during the on time will not be equal to the preset level 9 The On Off ratio is typically gt 40 dB e Set the 86544 AM MODULATION control to EXT NOTE The minimum rise time for pulse modulated output is typically 12 us Figure 3 8 Pulse Modulation 3 12
20. l perform to the standards set forth in the published specifications let the instrument warm up for one hour before using Figure 3 5 Operating Instructions 1 of 3 Operation 3 7 Operation Model 8654A OPERATING INSTRUCTIONS EREQUENCY SELECTION d Set the FREQUENCY RANGE control a to the band which includes the desired carrier frequency e Tune to the carrier frequency with the FREQUENCY TUNE control the mechanical fine tune provides greater tuning resolution The Cursor indicates the carrier frequency OUTPUT LEVEL SELECTION f Set the OUTPUT LEVEL range control Q and VERNIER Oto the desired output level For optimum AM performance and level meter accuracy the VERN IER control should be set for a meter indication of 7 to 3 dBm gt 1 3 full scale Amplitude modulation is restricted in the 10 dBm range g Vary the VERNIER control until the level shown on the OUTPUT LEVEL range control added to the meter indication equal the desired level For voltage keep in mind that meter indication of 7 to 3 dBm gt 1 3 full scale Amplitude modulation is restricted in the 10 dBm range AM MODULATION INTERNAL h Set AM MODULATION switch to INT i Select 400 or 1000 Hz modulation rate with the INTERNAL MODULATION frequency switch j Press the AM MTR switch and vary the LEVEL control 12 until the meter indicates the desired modulation depth Use top scale 10 100 AM MODULATION EXTERNAL k
21. permit a determination of operating capabilities 3 7 OPERATING INSTRUCTIONS 3 8 General operating instructions are contained in Figure 3 5 The instructions will familiarize the operator with basic operating functions of the Signal Generator 3 9 Calculating External FM Drive Voltage 3 10 The external FM drive voltage needed to obtain a desired peak frequency deviation of the carrier may be calculated from the relationship between the peak frequency deviation and FM sensitivity See Figure 3 6 3 11 The curve shown in Figure 3 7 relates FM sensitivity to carrier frequency for each band 3 12 Pulse Modulation 3 13 Pulse modulation of the 8654A is possible by using a pulse generator coupled to the signal generator through the external AM INPUT jack Figure 3 8 explains in detail how to accomplish pulse modulation 3 14 Auxiliary Output 3 15 The isolation of the AUX OUTPUT from the front panel RF OUTPUT is typically 30 dB Any signal that is coupled into the AUX OUTPUT may be transmitted to the generator s output An example of this is an electronic counter used to monitor the RF output frequency Subharmonic signals at the counter input are coupled into the AUX OUTPUT and from there to the front panel output where they are transmitted to the load 3 16 OPERATOR S MAINTENANCE 3 17 The maintenance responsibilities of the oper ator are replacing the primary fuse and LINE switch lamp 3 18 Fuses The fus
22. rials identical to those used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the type of service required return address model number and full serial number Also mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number 2 26 Other Packaging The following general in structions should be used for re packaging with commerically available materials a Wrap the instrument in heavy paper of plastic If shipping to a Hewlett Packard office or service center attach a tag indicating the type of service required return address model number and full serial number b Use astrong shipping container A double wall carton made of 350 pound test material is adequate c Use enough shock absorbing material 3 to 4 inch layer around all sides of the instrument to provide a firm cushion and prevent movement inside the container Protect the control panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling Model 8654A Installation SELECTION OF OPERATING VOLTAGE 1 Open cover door pull the FUSE PULL lever and rotate to left Remove the fuse Remove the Line Voltage Selection Card Position the card so the line voltage appears at top left corner Push
23. than 100 Hz plus 0 1 times modulation rate Envelope Distortion E RR Le Co Modulation Depth 0 100 Hz 1kHz Frequeney Modulation Deviation at least 0 1 of carrier frequency Modulation Rate Internal 400 amp 1000 Hz 10 External 3 dB bandwidth dc coupled to gt 25 kHz driven from 600 ohms or less External FM Sensitivity 10 Vox into 6002 yields gt 0 1 deviation 15 volts max 10 a 100 kHz Modulation Rate NOTE AM is possible above 3 dBm as long as the combination of the AM depth plus carrier output level does not exceed 9 dBm GENERAL CHARACTERISTICS Power 100 120 220 or 240 Volts 5 10 48 to 440 Hz 15 VA maximum 7 1 2 Ft 2 29 m power cable furnished with mains plug to match destina tion requirements 1 4 Weight Net 16 Ibs 4 oz 7 4 kg Dimensions 10 1 2 W x 6 1 8 H x 11 D 266 mmx 155 mm x 279 4 mm Model 8654A Installation SECTION Il INSTALLATION 2 1 INTRODUCTION 2 2 This section provides information on in coming inspection selecting the input line voltage operating environment and information applic able to bench and rack mounted operation of the Model 86544A 2 3 INITIAL INSPECTION 2 4 Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has be
24. the card firmly into the slot Rotate the FUSE PULL iever to its normal position Insert a fuse of the correct value in the holder Close the cover door Figure 2 1 Line Voltage Selection 8120 1378 8120 1351 8120 1368 8120 1689 Figure 2 2 Power Cable HP Part Numbers versus Mains Plugs Available Operation 3 0 KNURLED NUT HP 0590 0923 OQ HP 2140 0244 our PUSHBUTTON PLASTIC LENS HP 3101 0559 POWER LAMP REPLACEMENT 1 Remove lens by pulling straight out 2 Replace lamp 3 To replace lens align guide with notch in receptacie Push straight in Figure 3 1 Power Lamp Replacement Model 8654A Model 8654A Operation SECTION Ill OPERATION 3 1 INTRODUCTION 3 2 This section provides complete operating in structions for the HP 8654A Signal Generator The instructions consist of panel features operator s checks operating instructions and operator s maintenance 3 3 PANEL FEATURES 3 4 Front and rear panel features of the 8654A Signal Generator are described in Figures 3 2 and 3 3 These figures contain a detailed description of the Signal Generator controls indicators and connectors 3 5 OPERATOR S CHECKS 3 6 Upon receipt of the instrument or to check the Signal Generator for an indication of normal operation perform the operational procedures listed in Figure 3 4 These procedures are designed to familiarize the operator with the Signal Gener ator and
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