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03325-90002


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                            HEWLETT
                 E!i        PACKARD



    OPERATINGAND SERVICEMANUAL



        MODEL 3325A
SYNTHESIZER~FUNCTION
                   GENERATOR
                    Serial Numbers: All




                    IMPORTANT NOTICE
         This manualapplies all instruments.
                             to              Earlier
         versionsof the 3325A, however,may differ
         in designfrom the instrumentsthis revision
         documentsdirectly. Designand documenta-
         tions changes identified by a A symbol.
                        are
         The deltasymbolsreferservicing personnelto
         the backdating section(SectionVII) where
         specific information regardingthe changeis
         presented.




    To prevent potential fire or shock hazard, do not
    expose equipment to rain or moisture.



              Manual Part No. 03325-90002

             Microfiche   Part No. 03325-90052




   @ Copyright Hewlett-PackardCompany 1978,1981,1984
        P.O. Box 69, Marysville, Washington98270

                                                        Printed:   May 1384
                                           m            HEWLETT
                                                        PACKARD
                                               SAFETY SUMMARY

The following gensral safety prscautions must be obssrvad during all phnsss of operation, ssrwice, and rspair of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates
Safety standards of design, manufacture, and intended usa nf ths instrument Hewlett-Packard Company assumtis no
liability for the custom&s failure to comply with thsse requirements; This is B Ssfsty Class 1 instrument.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument         chassis and cabinet must be connected             to an elec-
trical ground. The instrument   is equipped     with a three-conductor           ac power cable. The power
cable must either be plugged into an approved           three-contact       electrical outlet or used with a
three-contact   to two-contact  adapter with the grounding            wire (green) firmly connected      to an
alactrical ground (safety ground) at the power outlet. The power jack and mating plug of the
power cable meet International    Electrotechnical      Commission        (IECI safety standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument   in the presence of flammable    gases or fumes. Operation                      of any
electrical instrument in such an environment   constitutes  a definite safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Operating   personnel must not remove instrument     covers. Component       replacement and internal
adjustments    must be made by qualified maintenance        personnel.  Do not replace components
with power cable connected.   Under certain conditions,    dangerous   voltages may exist even with
the power cable removed.    To avoid injuries, always disconnect       power and discharge circuits
before touching    them.

DO NOT SERVfCE OR ADJUST ALONE

Do not attempt     internal service or adjustment        unless   another   person,   capable   of rendering     first
aid and resuscitation,     is present.

DO HOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Becausa of the danger of introducing   additional  hazards, do not install substitute   parts or per-
form any unauthorized    modification to the instrument.    Return the instrument     to a Hewlett-
Packard Sales and Service Office for service and repair to ensure that safety features are main-
tained.

OAMEROUS PROCEDUREWARNINGS
Warnings,   such as tha example below, precede potentially dangerous                    procedures     throughout
this manual. Instructions contained in the warnings must be followed,

                                                piGi-

              Oangerous voltages, capable of causing death, are present in this instrument, Use BX.
              treme caution when handling, testing, and adjusting.


                                                                                                                         A
                                     SAFETYSYMBOLS

        GeneralDefinitions of Safety Symbols Used On Equipment or In Manuals.




                     Instruction manual symbol: the product will be marked with this
         A!          symbol when it is necessaryfor the user to refer to the instruction
                     manual in order to protect against damage to rhe instrument.

                     Indicates dangerous voltage (terminals fed from the interior by
             f       voltage exceeding 1000volts must be so marked).

                     Protective conductor terminal. For protection against electrical
  +      OR *
                 0   shock in case of a fault. Used with field wiring terminals to in-
                     dicate the terminal which must be connected to ground before
                     operating equipment.

                     Low-noise or noiseless,clean ground (earth) terminal. Used for a
                     signal common, as well as providing protection against electrical
         0           shock in caseof a fault. A terminal marked with this symbol must
                     be connected to ground in the manner described in the installation
                     (operating) manual, and before operating the equipment.

                     Frame or chassisterminal. A connection to the frame (chassis)of
                     the equipment which normally includes all exposed metal struc-
 d7       OR L       tures.

        b            Alternating current (power line).

         ---         Direct current (power line).

                     Alternating or direct current (power line).


                     The WARNING sign denotes a hazard. It calls attention to a pro-
Lpi-,                cedure, practice, condition or the like, which, if not correcrly per-
                     formed or adhered to, could result in injury or death to personnel.

                     The CAUTION sign denotes a hazard. It calls attention to an
   m                 operating procedure, practice, condition or the like, which,if not
                     correctly performed or adhered to, could result in damage to or
                     destruction of part or all of the product.

      NOTE:          The NOTE sign denotes important information. It calls attention
                     to procedure, practice, condition or the like, which is essential to
                     highlight.
Model 3325A                                                                                          Table of Contents




                                                TABLE OF CONTENTS
Section                                                 Page     Section                                            Page
1. GENERAL INFORMATION ..............                     1-l         3-24. Entry Errors....................         .3-4
       1-l. Introduction .......................          l-1         3-26. Function Selection ..............        -3-4
       l-5. Instrument Description ............          .1-l         3-28. FrequencyEntry ................          -3-4
       l-9. Specifications......................          l-1         3-30. FrequencyLimits ...............          .3-4
     I-I I. SupplementalOperating Information l-l                     3-32. FrequencyDisplay and Resolution .3-5
     l-13. RemoteControl ...................             .1-l         3-34. Auxiliary Output (SineFunctionOnly)3-5
     l-15. Options ..........................            .1-l         3-36. Amplitude Entry ................         .3-5
     1-I 7. Aceessorics Supplied................          l-5         3-39. Amplitude Calibration ...........        .3-5
     l-19. Accessories  Available ...............         l-5         3-41. High Voltage Output Option 002 .3-h
     1-21. Instrument and Manual Identification l-6                   3-43. DC Offset. .....................         .3-6
     l-24. Safety Considerations.        ..............   l-6         3-46.    PhaseEntry ....................       .3-7
     1-27. Recommended       Test Equipment ...... l-6                3-49. FrequencySweep................           .3-7
                                                                      3-55. SweepMarker ..................           .3-9
Section                                                  Page         3-58. SweepX Drive Output .........           .3-10
11. INSTALLATION .......................                  .2-l        3-60. SweepZ Blank Output .........           .3-10
      2-l. Introduction. .....................            .2-l        3-62. Amplitude Modulation. .........         .3-10
      2-3. Initial Inspection. .................          .2-l        3-66. PhaseModulation. .............          .3-l I
      2-5. PreparationFor Use...............              -2-l        3-68. Modify Keys ..................          .3-l I
      2-6.   Power Requirements.        ............      .2-l        3.70,    Store and Recall ...............     .3-l 1
      2-8.   Line Voltage Selection...........            .2-l        3-72. Operator'sChecks                    . ..3-II
     2-10. Power Cable ................              ,.,.2-l          3.74.    Self Test                        . ..3-11
     2-12. HP-IB Connections .............                .2-l        3-76. Output Checks..............             .3-11
     2-15. 3325A Listen/Talk Address ...... .2-3                      3-78. Operator'sMaintenance.                  .3-12
     2-17. HP-IB Description ..............               .2-4        3-81. HP-B Operation                          .3-12
     2-19. ConnectingOven Option 001 ..... .2-4                       3-83. GeneralHP-IB Description                -3-13
     2-21. OperatingEnvironment ............              .2-4        3-88. Definition of HP-IB Terms
     2-23. Cooling System.................                -2-4                 and Concepts                         .3-13
     2-26. Bench Operation................                .2-4        3-89. Basic DeviceCommunication
     Z-28. Rack Mounting .................                .2-4                 Capability.                          .3-14
     2-30. Storageand Shipment .............              .2-4        3-91.    Message  Definitions                 -3-14
     2-31. Environment .....................              .2-4        3-93. 3325A Response Messages .3-14
                                                                                                to
     2-33. Instrument Identification ...........          .2-h        3-95. HP-IB Work Sheet..                      .3-14
     2-35. Packaging........................              .2-6        3-97. HP-IB Addressing..                      .3-14
                                                                      3-100. 3325A RemoteProgramming                .3-14
Section                                                 Page          3-101. 3325A HP-IB Capabilities               .3-14
111. OPERATION., .........................               .3-l         3.103. Developingan HP-IB Program .3-15
      3-l. Introduction ......................           .3-l         3.107. Universaland Addressed        Commands3-17
      3-3. Panel Features    ....................        .3-3         3-109. Placing the 3325Ain Remote. .3-17
      3-S. Power/Warm-Up .................               .3-3         3-111. The 3325AAddress               .       .3-17
      3.8. Initial Conditions .................          .3-3         3.113. 3325A Data Message        Formats      .3-17
     3.10. Self Test .........................           .3-3         3.115. Data Transfer Mode.                    -3-20
     3-12. Front/Rear Signal Output ..........           .3-3         3-118. ProgrammingData Transfer Mode 3-21
     3-14. sync Output.......................3-             3         3.120. Programming Entry Parameters .3-21
     3.16. External Reference       Input ...........    .3-4         3-122. ProgrammingWaveform Function 3-21
     3-18. 1OMHzOven Option 001 ..........               .3-4         3-124. ProgrammingBinary (On or Oft?
     3-20. Manual Programming .............              .3-4                  Functions                            .3-22
     3-22. Clear Display. ..................             .3-4         3-126. Programming SelectionFur,,~ons .3-22
Table of Contents                                                                                            Model 3325A


                                       TABLE OF CONTENTS        ICont'd)                                                            -,
                                                                                                                                    @
     3.128. ProgrammingExecution Functions3-22                4-47.        Ramp RetraceTime                             .4-16
     3-130. ProgrammingAmplitude Units                        4-49.        Sync-OutputTest ..............               -4-16
            Conversion                    .3-23               4-51.        SquareWave Symmetry. ........                .4-16
     3-132. ProgrammingStorageRegisters , .3-23               4-53.        FrequencyAccuracy ............               .4-17
     3-134. ServiceRequests               .3-23               4-55.        PhaseIncrementAccuracy ......                .4-17
     3-136. Serial Poll.,                 .3-23               4-57.        PhaseModulation Linearity .....              .4-19
     3.138. StatusByte..                  .3-24               4-59.        Amplitude Accuracy. ...........              .4-20
     3-140. Busy Flag                     .3-24               4-61.        DC Offset Accuracy (DC Only),                .4-23
     3.142. SweepFlag..                   .3-24               4-63.        DC Offset Accuracy
     3.144. Masking or Enabling Service                                    with AC Functions .............              .4-25
            Requests                      .3-24               4-65.        Triangle Linearity ..............            .4-25
     3-146. interrogating Program Errors. -3-24               4-67.        X Drive Linearity ..............             .4-27
     3-148. InterrogatingEntry Parameters .3-25               4.69.        Ramp Period Variation .........              -4-29
     3.150. InterrogatingFunction                             4.71.        HP-IB InterfaceTest ...........              -4-30

     3-152. hrterrogatingMiscellaneous                  Section                                              Page
            Parameters                      -3-26       V. ADJUSTMENTS ........................               .5-l
     3-154. Using the InterrogateCapability ,316              5-l. Introduction. .....................        .5-l
     3.156. 3325AProgramming Procedure .3-27                  5-3. Equipment Required...............          .5-2
                                                              5-5. Adjustment Procedures............          .5-2
     Appendix A. Meta Messages         Block                  5-7.   Power Supply ..................          .5-2
     Diagrammed ...........................    .A-1           5-8.   D/A ConverterOffset ...........          -5-2
                                                              5-9.   Voltage Controlled Oscillator
     Appendix B. Programming The Model 3325A                         (VCO Frequency)...............           .5-2
     with the 9825ACalculator ............... .B-1           5-10. Analog PhaseInterpolation (API). 5-2
                                                             5-11. 30MHz Reference         Oscillator ....... 5-3
Section                                        Page          5-12. Option 001 High Stability
IV. PERFORMANCE TESTS ................           -4-l                FrequencyReference............           .5-3
      4-l. Introduction. .....................   .4-l        5-13. Sine Wave Amplitude Calibration .5-3
      4-3. Calculator-ControlledTest ......... .4-l          5-14. X Drive. .......................           .5-4
      4-5. OperationalVerification ...........   .4-l        5-15.   Amplifier Bias Adjustment ....... .5-4
      4-8.   RequiredTest Equipment ........ .4-l            5-16. Ramp Stability...................5-           5
     4-10. Self Test .......................     .4-l        5.17.   Amplitude Flatness,.............         .5-5
     4.12.   Sine Wave Verification ..........   .4-l        5-18. Mixer SpuriousSignal ... .1. ..... .5-6
     4.14.   SquareWave Verification ........ .4-2
     4-16. Triangle and Ramp Verification .. .4-3
     4-18. Amplitude FlatnessCheck. ....... .4-3        Section                                                          Page
     4-20. Sync Output Check .............       .4-4   VI. REPLACEABLE PARTS ................                            .6-l
     4-22. FrequencyAccuracy .............       .4-4         6-l. Introduction. .....................                    -6-l
     4-24. Output Level and Attenuator                        6-4. Ordering Information ..............                    .6-l
             Check ........................    ..4- 4         6-6. Non-Listed Parts. .................                    .6-l
     4.26.   Harmonic Distortion Test ........ .4-5           6-8. Proprietary Parts .................                    .6-l
     4-28. Close-InSpurious SignalTest .... .4-6             6-10. Printed Circuit Assemblies.........                    .6-l
     4.30.   HP-IB InterfaceTest ............    .4-6
     4-32. PerformanceTests ...............    .4-l 1
     4-35. Equipment Required............      .4-12    seaiorl                                                             Page,
     4-37. Harmonic Distortion Test ....... -4-12       VII. MANUAL BACKDATING                                               -7-l
     4-39. SpuriousSignal Tests...........     .4-13          7-l. Introduction..                                            .7-l
     4-41. IntegratedPhaseNoise Test ..... .4-15              7-3. Format . . . . . . . . . . . . . . . . . . . . . . . . ...7-1
     4-43. Amplitude Modulation Envelope                      7-5. ChangeSheetsand ServiceNotes                              .7-l
             Distortion Test ................  .4-15          7-8. Backdating Information.                                   .7-2
     4-45. SquareWave RiseTime                                7-9.   ServiceGroup A Keyboardand
             and Abberations...............    .4-16                 Display (03325-66505)             Al                    .7-2
Model 3325A                                                                                                                     Table of Contents



    Section                                                            Page       Section                                                          Page
      7-12.     Service Group B - HP-IB Circuits                                    8.7.        Keyboard and Display
                (P/O 0332566506) A2                                        .7-3                 (Service Group A).                                    .8-l
      7-15.     Service Group C Control Circuits                                   S-12.        HP-IB Circuits (Service Group B) .8-3
                (P/O 03325-66506) A2                                       .7-3    8-18.        Control Circuits (Service Group C) .8-5
      7.18.     Service Group D Voltage Controlled                                 8-24.        Frequency Synthesis                                   .8-8
                Oscillator Shield (P/O 03325.66521)                                8-43         Reference Circuits
                A3                                                         .7-5                 &mice Group G).                                     .&I2
     7-21.      Service Group E + N.F. Counter                                     8-51.        Mixer (Service Group H)                             .8-l 3
                (P/O 03325-66521) A3                                       .7-7    E-53.        D/A Converter (Service Group 1) .8-13
     7-24.      Service Group F Fractional N                                       S-59.        Function Circuits
                Analog Circuits (P/O 0332566521)                                                (Service Group J)                                   .8-16
                A3     . ..                            ,..,        ,... 7-10       8-72.        Output Amplifier
     7-27.      Service Groups W and G " VCO Buffer                                             (Service Group 9).                                  .8-19
                (P/O 03325.66503), 30MHz Reference                                 8-77.        Attenuator (Service Group L)                         S-19
                and Dividers (P/O 03325.66503)                                     8-80.        High Voltage Output Option 002
                A4 . . . . . . . . . . . . . . . . . . . . . . . . . ...7-12                    (Service Group M)                                   .8-19
     7-31.      Service Group H Mixer                                              8-82.        Sweep Drive Circuits
                (P/O 03325.66503) A4                                     .7-14                  (Service Group N).                                  .8-19
     7-34.      Service Group I D/A Converter and                                  8.89.        Crystal Oven Option 001
                Sample/Hold          (P/O 03325-66514)                                          (Service Group M)                                   .8-22
                A5                                       ---              7-15     8-91.        Power Supplies (Service Group 0) 8-22
     7-37.      Service Group J Function Circuits                                  S-98.     Sine Amplitude Control Path                    S-23/8-24
                (P/O 03325.66514) A5                                     .7-17     8-99.       Amplitude Control Circuitry g-23/8-24
     7-40.      Service Group K Output Amplifier                                   8-102.      Auto Calibration Disable
                (P/O 03325-66514) A5                                     .7-20                  (ACD)                                      .8-23/S-24
     7-43.      Service Group L Attenuator                                         8-104.    Servicing Information                                  .8-25
                (03325-66523) and Relay Drivers                                    8.105.       Power Line Voltage Selection.                       .8-25
                (P/O 03325~66514) A5,A6                                  .7-22     8-107.      Fan Filter                                           .8-25
     7-47.      Service Group M - Options: High Voltage                            S-109.      Adapter Cable..                                      .8-25
                Output (Opt. 002) (03325-66508) and                                S-111.      Access to Reverse Side of A21, A3, A14,
                High Stability Reference (Opt. 001)                                            and A6 . . . . . . . . . . . . . . . . . . . . . ...8-25
                (03325.66509) A7.                                        .7-24     8.113.      A6, A14, A3, A21, A23 Connector
     7-49.      Service Group N Sweep Drive Circuits                                           Compatibility.                                       .8-26
                (P/O 03325-66514) A5                                     .7-24     S-115.    Troubleshooting     Information                        .8-26
     7-52.      Service Group 0 Power Supplies                                     S-117.      Test Equipment Required                              .8-26
                (03325.66502) A8.                                        .7-25     8-l 19.     Adjustments Required After
                                                                                               Repair                                               .8-28
Section                                                                 Page       8-121.      Basic Troubleshooting            Procedures 8-28
Vlll. SERVICE ..............................                             -8-I      8.124.      Orientation Of Components                            .8-28
        8-l. Introduction ......................                         .8-l      8-126.      Mnemonic Wictionary                                  .8-28
        8-3. Basic Theory .....................                          .8-l      8.128.       Logic Troubleshooting           by Signature
        8-5. Theory Of Operation ...............                          S-1                  Analysis                                             .8-28


                                                                    LIST OF TABLES

      Table                                                              Page       Table                                                          Page
        l-1.   Specifications.                                              l-2      3-l.     Operating Information.                                 -3-I
        1-2.   Supplemental Information.                                    l-3      3-2.     Amplitude Limits of AC Function                        .3-S
        l-3.   HP-IB Interface Capability..                                 l-6      3-3.     High Voltage Output Amplitudes
        l-4.   HP-IB Response Times                                         I-7               (Option 002).                                          .3-6
        1-S.   Recommended Test Equipment                                 . l-8      3-4.     Maximum DC Offset
        2-l.   HP-IB Addresses.                                           .2-5
Tableof Contents                                                                                          Model 3325A


                                                   LIST OF TABLES Kmt'd)

    Table                                                 Page     Table                                        Page
     3-5.   GeneralInterfaceManagementLines3-14                     7-4.   A6 Board Revisions..............    ..7- 3
     3-6.   Definition of Meta Messages        ...... .3-15         7-s.   A21(Al) Board Revisions..........     .7-6
     3-l.   3325A Implementationof Messages               .3-16     7-6.   A21(Al) Board Revisions..........     .7-S
     3-8,   InterfaceFunctions...............             .3-16     I-1.   A21(Al) Board Revisions.........    .7-10
     3-9.   Summary of 3325A Programming                            7-8.   A3 Board Revisions..............    .7-12
            (ASCII). ....................         , . , . .3-I8     l-9.   A3 Board Revisions..............    .7-14
    3-10.   ProgrammingCodes..............                .3-19    7-10.   A14(A4) Board Revisions.........    .7-16
    3-11.   SRQ Mask/Enable Data ..........               .3-25    7-11.   A14(A4) Board Revisions......... .7-I7
     4-l.   Test Equipment Requiredfor                             7-12.   A14(.44)Board Revisions ......... -7-21
            OperationalVerification ...........            .4-Z    7-13.   A23(A7) Board Revisions ......... .7-22
     4-2.   Test Equipment Required                                7-14,   A14(A4) Board Revisions .........   .7-24
            for PerformanceTests ............             .4-11    7-15.   A2 Board Revisions..............    .7-25
     5-1.   Test Equipment RequiredFor                              8-l.   Attenuation and VoltageRanges.... .8-20
            Adjustments......................              .5-l     8-2.   Assembly/CableCompatibility
     5-2.   PaddingValues ...................              .5-6            for Serial Numbers 1748A04250
     6-I,   List of Abbreviations..............             -6-Z           and Below. .......................   .S-25
     6-2,   List of Manufacturers .............             .6-2    8.3.   Test Equipment for Troubleshooting S-26
     6-3,   Replaceable   Parts List .............          .6-3    s-4.   Adjustments RequiredAfter Repair .8-28
     7-l    3325A Circuit Board Revisions ...... l-2                8-5.   Trouble Symptoms................     .8-29
     7-2    A5 Board Revisions...............               .7-2    8-6.   Mnemonic Dictionary. ..............   S-30
     7-3.   A6 Board Revisions...... ... .... .7-3

                                               LIST OF ILLUSTRATlONS                                                         @

    Figure                                               Page      Figure                                            Page
     2-I. Line Voltage Selection.............             .2-Z      5-I * Ramp ResetWaveform                         .5-5
     2-2. Power Cables.....................               .2-3      5-2. Amplitude FlatnessAdjustment                ,526
     2-3. HP-IB Connector .................               .2-3      5-3. Location of Adjustments.                    .5-7
     2-4. Rack Mount and Handle Kits ......               .2-6      6-l. Location of Parts                      6-31/6-32
     3-I. Front and Rear Panel Controls .....             .3-Z      7-l. ProcessorInterrupt Circuitry (Serial
     3-2. Maximum DC Offset with                                          Numbers 1748A00230 Below) .7-4
                                                                                                      and
           AC Functions ....................              .3-8      7-2. Schematic Board Location of Rll and
                                                                                    and
     3-3. InterfaceConnectionsand                                         R12 (SerialNumbers 1748A02600           and
           Bus Structure. ...................            .3-13            Bel0w)............................7-4
     4-I. Harmonic Distortion Verification                          7-3. VCO Circuitry Serial Numbers
           (High Voltage Output). ............            .4-5            1748A02475 Below
                                                                                        and                          -7-6
     4-2. Mixer SpuriousTest ..............              .4-I3      7-4. VCO Circuitry - Serial Numbers
     4-3. IntegratedPhaseNoise Test .......              .4-14            1748A03226 1748A07390
                                                                                        to                           .7-7
     4-4. AM EnvelopeDistortion ..........               .4-15      7-5. HINV Clocking Circuitry SerialNumbers
     4-5. SquareWave Symmetry...........                 .4-17            1748A00230 Below
                                                                                        and                          .7-8
     4-6. FrequencyAccuracy..............                -4-18      7-6. A21U8 Gating Circuitry - Serial Numbers
     4-7. PhaseIncrementAccuracy ........                -4-18            1748A02475 Below
                                                                                        and                           l-9
     4-8. PhaseModulation Linearity .......              .4-19      7-7. A21U8 Cating Circuitry Serial.Numbers
     4-9. Amplitude Accuracy and Flatness..              .4-24            1748A02476 1748A07390
                                                                                        to                           .7-9
    4-10. Triangle and Ramp Linearity Test.              .4-26      7-8. Integratorand PhaseModulation Circuitry
    4-11. Triangle Linearity Test ...........            .4-27             Serial Numbers 1748A02475
    4-12. X Drive Linearity Test. ...........            .4-29            and Below                                 .7-IO
    4-13. X Drive Linearity Test. ...........            .4-30            Sample/Hold Circuitry (Serial Numbers
    4-14. Ramp ResetWaveform ...........                 .4-30            1748A02475 Below)
                                                                                        and                         .7-l 1
    Model 3325A                                                                                                      Table of Contents


                                                     TABLE OF CONTENTS (Cont'd)

    Figure                                                     Page   Figure                                                             Page
          7-10.   U14 Biasing Circuitry (Serial Numbers                8-22.   Simplified Illustration of Ramp
                  1748AOO620 and Below)                       .7-12           Generation                              .8-18
         7-11.    Sine Amplitude Control and Amplitude                 8.23. Marker and X Drive Start-Stop
                  Modulation   Circuitry (Serial Numbers                      Flip-Flops                               S-20
                  1748A04675 and Below)                   _, .7-13     8-24. X Drive Ramp Output.                     .8-21
         7-12.    Mixer Driver Circuitry (Serial Numbers               8-25. Power Supply Standby/On Circuit          .8-22
                  1748A04675 and Below)                      .7-15     S-26. Sine Amplitude Control Path         S-23/8-24
         7-13.    DC Offset Control (Serial Numbers                    8-27. Adapter Cable           .    .    .      .8-27
                  1748A01075 and R&w)                        .7-18     X-B(a). Access to Keverse Side of
         7-14.    WC Offset Control (Serial Numbers
                  1748A08790to     1748A01076)........7-18            8-28(b). Basic Troubleshooting                  Procedure            .8-31
         7-15.    Amplitude Control Circuitry (Serial                 8-29. Signature Analysis Test 4                                   .8-A-5
                  Numbers 1748A05825 and Below)              .7-19    S-30. Keyboard and Wisplay, A5 S-A-7/8-A-S
         7-16.    Amplitude Control Circuitry (Serial                 8-3 l(a). Signature Analysis Test 3                       8-B-5/8-8-6
                  Numbers 1748A05826 to                               8-3 l(b). Signature Analysis Test 3 .8-B-7/8-B-8
                  1748A08790)                                .7-20    8-31(c). Signature Analysis Test 3.                            .3 8-B-9
                  Output Amplifier (Serial Numbers                    8-32. HP-IB Circuits, A6                                        .8-B-l 1
                  1748A01900 and below). _, _,               .7-21    8-33(a). Signature Analysis Test 1 S-C-19/8-C-20
                  Relay Drive Circuitry (Serial Numbers               8-33(b). Signature Analysis Test 1 8-C-21/8-C-22
                  1748AO1075 and Below)                      .7-23    8-34(a). Signature Analysis Test 2 8-C-25/8-C-26
                  Location Of F2 (Serial Numbers                      8-34(b). Signature Analysis Test 2 S-C-27/8-C-28
                  1748AO5825 to 1748A01076).                -7.2G     8-35(a). Signature Analysis Test 5 8-C-31/8-C-32

a        7-20,

          8-l.
                  j, 15V Regulator (Serial Numbers
                  1748A01075 and Below)
                Simplified Block Diagram             .8-2
                                                            ,7-26
                                                                      8-35(b). Signature Analysis Test 5 8-C-33/8-C-34
                                                                      8-35(c). Signature Analysis Test 5
                                                                      8-36. Control Circuits, A6
                                                                                                                                      .8-C-35
                                                                                                                                      .8-C-37
          8-2.  Basic Block Diagram, Logic Circuits .8-2              8-37. VCO, A21, and VCO Buffer,
          8-3.  Keyboard and Display Block Diagram 8-3                         A3                                            .8-D-7/8-D-8
          8-4.  HP-IB Data Input Path.               .8-4             8-38. + NJ, Counter, A21                                  S-E-3/8-E-4
          8-S.  HP-IB Data Output Path               .8-4             8-F-I. TP9 and TPlO Waveforms                                     .8-F-4
          8-6.  HP-IB Management and Handshake ,8-S                   8-39. Fractional N Analog, A21                           .8-F-5/8-F-6
          8-7.  Basic Block Diagram of Control                        8-G-l. Sine h'nDhKk               Control Path                      8-G-2
                Circuits                             .8-6             8-40. 30MHz I&ference and Dividers,
           8-8. Phase Lock Loop                      -8-7                      A3                                            .8-G-3/8-G-4
           8-9. Phase Detector                       .8-8             ~-H-I Sine Amplitude Control Path                                -8-H-2
         s-10. Integrator Output                     .8-9             8-41. Mixer, A3                                        .8-H-3/8-H-4
         S-11. Addition of D/A Converter and                          8-I-l. Sine Amplitude Control Path                                  .8-l-3
                Pulse Remove Blocks..                .8-9             8-42. D/A Converter and Sample/Hold,
         8-12. Phase Accumulation.                 -8-10                       Al4.                                             .8-I-5/8-1-6
         8-13. Divide By N Counter . . .        .. .8-l 1             8-J-l. Sine Amplitude Control Path                                 -8-J-4
         S-14. External Reference Phase Lock Loop                     8-43. Function Circuits, Al4                               S-J-7/8-5-8
                Block Diagram                .. .  .8-12              8-K-l. Sine Amplitude Control Path                               .8-K-2
         S-15. Level Control and Amplitude                            8-44. Output Amplifier, Al4                              8-K-5/8-K-6
                Modulation                         -8-13              8-45. Relay Wrivers, A14, and Attenuator,
         S-16. Mixer Diagram                       .8-14                       A23 . . . . . . . . . . . . . . . . . . . ...8-L-3/8-L-4
         S-17. Preset Counters.                    .8-14              8-46. High Voltage Output Option 002
         8.18. D/A Converter                       -8-15                       A8                                           .8-M-3/8-M-4
         S-19. DAC Sample/Hold..                   ,8-15              8-41. High Stability Reference Option 001,
         8-20. Enable Signals For Function                                     A9 . . . . . . . . . . . . . . . . . . . ...8-M-S/S-M-6
                Switching           _,             .8-17              8-48. Sweep Drive Circuits, Al4                        .8-N-3/8-N-4
         S-21. Simplified Illustration of Triangle                    8-49. Power Supplies, A2                               .8-O-3/8-0-4
                Gencration                         .8-18              8-50. Function Block Diagram                            .8-P-l /8-P-2
Model 3325A                                                                                        General Information


                                              SECTIONI
                                          GENERAL
                                                INFORMATICIN
1-l. INTRUUUCTION.                                            l-8. The Model 3325A is fully programmable through
                                                              the rear panel Hewlett-Packard Interface Bus (HP-IB)
l-2. The Operating and Service ManuaI contains infor-         connector. A device such as a programmable calculator
mation required to install, operate, test, adjust, and WV-    is capable of remoteIy controIling the 3325A. Interface
ice the Hewlett-Packard Model 3325A Synthesizer/Func-         information is given in Section II of this manual, and
tion Generator. The Operating Manual supplement is a          programming inf0rmaticm is in Section III.
copy of the first three sections of the Operating and Serv-
ice Manual, plus the Operational Verification procedures      l-9. SPECIFICATIONS.
from Section IV. The supplcmsnt should be kept with
the instrument for use by the operator. The part num-         I-10. Instrument specifications are listed in Table 1-I.
bers of both the Operating and Service Manual and the         These specifications are the performance standards or
Operating Manual supplement are Shown on the titIe            limits against which the instrument is tested. Any
pages.                                                        changes in specifications due to manufacturing, design
                                                              or traceability to the U.S. Nationai Bureau of Standards
                                                              are included in Table l-l of this manual and/or the
l-3. Also shown on the title page of this manual is a         Manual Changes Supplement.
Microfiche part number. This number can be used to
order 4 x 6 inch transparencies of the Operating and
Service Manual, Each Microfiche contains up to 96
photo-duplicates of the manual pages, The Microfiche
package includes the latest Manual Changes supplement
as well as pertinent Service Notes.                           1-l 1.   SUPPLEMENTAL OPERATING INFORMATION.

1-4. Additional cop& of the Operating and Service             I-12, Table 1-2 contains information describing general
Manual, Operating Information Supplement, or Service          operating characteristics of the 3325A, This informa-
No&$ can be ordered through your nearest Hewlett-             tion is supplemental operating information and is not to
Packard Sales and Service Office. (A list of these offices    be considered as specifications.
is provided at the end of this manual.)
                                                              l-13. REMOTE CONTRcll.
1-5. INSTRUMENT DESCRIPTION.
                                                              1-14. Table l-3 lists the HP-IB interface capabilities of
f-4. The Mode1 3325A Synthesizer/Functicm Generator           the Model 332SA in conformity with IEEE Standard
producea the following signals at a minimum frequency         483-1978, "Standard Digital Interface for Programmable
of 1 pI+z and maximum frequency of:                           Instrumentation".    HP-II3 response times are given in
          Sine wave                20 MHz                     Table 1-4.
          Square wave              10 MHz
          TriangIe                 10 kHz                     1-I 5. UPTIDNS.
          Positive slope ramp      10 kHz
          Negative slope ramp      IO kHz                     1-16. The following options extend the frcquebcy
                                                              stability and output amplitude capabilities of the Model
Frequency may be seiected with up to eleven digits of         33251%:
resolution. Output amplitude is 1 mV to 10 V peak-to-
peak. The output level may also be selected or displayed           Option 001      High Stability Frequency Reference
in V rms or in dBm (50 ohms). Any function may be dc                               High Voltage Output
                                                                   Option 002
offset up to f 4.5 V, or the output may be dc only up to
 L 5 V. An optitmal high voltage output produces up to        The following options indicate the line voltage to which
40 V p-p into ~500 ohms load.                                 the instrument was set at the factory:
1-7. Frequency sweep of all functicm$ is provided ia               Option   100    Nominal 100 V    ac
linear OJ lbg sweep, at sweep times of 10 milliseconds to          Option   120    Nominal I20 V    ac
99.99 seconds for linear sweep. Maximum time for log               Option   XXI    Nominal 220 V    ac
sweep is 99.99 seconds and minimum time is 2 seconds               Option   240    Nominal 240 V    ac
for sir@ log sweep and 0.1 second for continuous log
sweep. Single linear sweep may be up or down, while
continuous sweep is up/down/up,       etc., in the linear
mode and up/up, etc., in log mode.
General      hfmnation                                                                                                                                                                     Model      3325A


                                                                                                  Table 1.1. Specifications.
     WNCTIGNG              AND FNEGUENCIEG                                                                            AMPLITUGE
                                                                                                                         Amplitude   Accuracy with no Attenuation  lAttenuator
            Sine WBYW                                                                                                    range 1) into 50 ohm Load. INo D.C. offset1
                Signal Output   ,FrO"t or Rear Panel,:
                    0.000   001 Hz to 20 999 999.999                                           Hz                      Function     and                        Tolerance       relative    to
                                                                                                                       frequency      range                    programmed           amplitude
                   Auxiliary    Output   ,Rear Panel,:
                        21 000 000.000         Hz to 60 999                             999.999            Hz
                        Underrange     fo 19 000 000.001                                 Hz

            Square         Wave:        0.000         001        Hz to 10 999               999.999             Hz
                                                                                                                        ,001   Hz to 100      kHz
            Triangle:          0.000       001        Hz to 10 999.999                      999      Hz
                                                                                                                        ,001   Hz to 2 kHz
            Positive   and Negative Slope Ramp:
                 0.000   001 Hz to 10 999.999                                   999     Hz

     nlEG"ENCY             NEGGLUTlGN                                                                                   ,001    Hz to 500 Hz
                                                                                                                        500    Hz to 10 kHz
            1 pHz for frequencies                      below       100 kHz
            1 mHz for freq"e"cies                       100       kHr and higher                                        Flatness    with no attenuation        Tolerance       relative       to
                                                                                                                        (Attenuator     Range 1 I into         programmed                 amplitude     at
     mEG"ENCY              ACCURACY ,Standard                I"strY.e"t,                                                a 50 Ohm load                          1 kHz

             * 5 x 10~6 of selected                      "abe          ,20



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