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5328A


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                                         Errata


Title & Document Type: 5328A Universal Counter Service Manual


Manual Part Number: 05328-90011


Revision Date: April 1976



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

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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
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                                 www.tm.agilent.com

Search for the model number of this product, and the resulting product page will guide
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                               5328A
                        UNIVERSAL COUNTER

                                 SERVICE MANUAL


                                 SERIAL PREFIX : 1604A

                  This manual applies to Hewlett-Packard Model
                  5328A Universal Counters with serial prefix num-
                  ber 1604A .

                             SERIAL PREFIXES NOT LISTED

                  For serial prefixes above 1604A, a "Manual Change"
                  sheet is included with this manual . For series pre-
                  fixes below 1604A, refer to Section V of this manual .




                  Copyright     HEWLETT-PACKARD COMPANY            1976
                  5301 STEVENS CREEK BLVD ., SANTA CLARA, CALIF . 95050

                                     Printed: APR 1976




MANUAL PART NUMBER 05328-90011
MICROFICHE PART NUMBER 05328-90012                                         PRINTED IN U .S.A .



                                                            HEWLETT PACKARD
titodel 5328A
Contents



                                                             CONTENTS
          Section     Title                                                                                                                                                                         Page

                I     GENERAL INFORMATION . . . . . .                         . . . . . . . . . . .   .. ..... . . .     .    .   .    .    .   .   .   .   .    .     .     . .         .     .    1-1
                      1-1 .  Introduction . . . . . . . . . .                 .. . . . . . . . . .    . . . .... .. .    .    .   .    .    .   .   .   .   .    .     .     ..          .     .    1-1
                      1-4 .  Description . . . . . . . . . . .                ... .. . . . . . .      . . . . ..... .    .    .   .    .    .   .   .   .   .    .     .     . .         .     .    1-1
                      1-6 .  Instrument Identification                          . ... . . . . . .     . . . . ..... .    .    .   .    .    .   .   .   .   .    .     .     . .         .     .    1-1
                      1-8 .  Applications . . . . . . . . . . .               . ...... . . . .        . . . . ..... .    .    .   .    .    .   .   .   .   .    .     .     . .         .     .    1-2
                      1-17.  Options . . . . . . . . . . . . . . .            . . ..... . . . .       . . . . ..... .    .    .   .   .    .    .   .   .   .    .     .     . .         .     .    1-2
                      1-19.  Equipment Supplied and                           Accessories             Available         .     .   .   .    .    .   .   .   .    .     .     . .         .     .    1-3
                      1-21 . Specifications . . . . . . . . . .               . . ..... . . . .       . . . . . .....    .   .    .   .    .    .   .   .   .    .     .     . .         .     .    1-3

                II    THEORY         OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                       .     .     .     .     .     .   2-1
                      2-1 .          Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                               .     .       .     .     .     .   2-1
                      2-3 .          Overall Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                    .     .       .     .     .     .   2-1
                      2-10.              Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                    .     .       .     .     .     .   2-3
                      2-14.              Main Counter Section . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                           .     .       .     .     .   .     2-3
                      2-19 .             Input Options Section . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                          .     .       .     .     .   .     2-4
                      2-27.            Hewlett-Packard Interface Bus (HP-113) Section . . . . . . .                                                             .     .       .   .     .     .     2-5
                      2-29.          A1 Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                   .     .     .     .     .     .     2-5
                      2-31 .           Display Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                  .     .     .     .     .     .     2-5
                      2-34.              State Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                  .     .     .     .     .     .     2-5
                      2-36 .             Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                               .     .     .     .     .     .     2-5
                      2-39 .           Decade Counting Assembly (DCA) . . . . . . . . . . . . . . . . . .                                                       .     .     .     .     .     .     2-6
                      2-43 .           Time Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                              .     .     .     .     .     .     2-6
                      2-47 .         A2 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                    .     .     .     .     .     .     2-7
                      2-49 .           +5V Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                               .     .     .     .     .     .     2-7
                      2-53 .         A4 Function Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                     .     .     .     .     .     .     2-7
                      2-55.              High Speed Multiplexer, Main Gate, and 1st Decade                                                                            .     .     .     .     .     2-7
                      2-58 .             Arming Multiplexer and Arming FF . . . . . . . . . . . . . . . .                                                       .     .     .     .     .     .     2-8
                      2-60 .             Time Base Multiplexer and Main Gate FF . . . . . . . . . .                                                             .     .     .     .     .     .     2-8
                      2-63.              An Example of Operation . . . . . . . . . . . . . . . . . . . . . . . .                                                .     .     .     .     .     .     2-8
                      2-67.          Standard Time Interval Module (A10 and A19) . . . . . . . . . .                                                            .     .     .     .     .     .     2-9
                      2-77.              A16 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                           .     .     .     .     .     .     2-10

            III       MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                           3-1
                      3-1 .   Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                              3-1
                      3-3 .  Assembly Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                        3-1
                      3-5 .  Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                 3-2
                      3-7 .  Assembly Connection Identification . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                   3-2
                      3-9 .  Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                         3-2
                      3-11 .      Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                              3-3
                      3-13.       Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                              3-3
                      3-15 .      In-Cabinet Performance Check . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                    3-3
                     3-17 .  Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                         3-3
                     3-18 .       Printed Circuit Component Replacement . . . . . . . . . . . . . . . .                                                                                             3-3
                     3-20 .       Replacing Integrated Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                               3-3
                     3-22 .  Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                              3-9
                     3-24.        Oscillator Adjustment (Standard or Option 010) . . . . . . . . . .                                                                                                3-9
                     3-26.        Sensitivity Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                         3-9
                     3-28 .  Instrument Troubleshooting                       . . . . . . . .... . . . . . . . . . .. . . . . .....                                                                 3-10
                     3-30 .  Troubleshooting Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                       3-10
                     3-32 .       DVM Extender Board Kit (05328-82020) . . . . . . . . . . . . . . . . . .                                                                                          3-10
                     3-34 .       Extender Board (05328-62016) . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                3-10
                     3-36 .       Function Selector and ROM Kit (05328-82004) . . . . . . . . . . . .                                                                                               3-10
                                                                                                                                                                                                                         Model 5328A
                                                                                                                                                                                                                            Contents



                                    CONTENTS (Cont'd)
Section   Title                                                                                                                                                                                                         Page

          3-40 .       Using the Test Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                 3-11
          3-45 .           Test Card 1, Test 1, Low Disable Decade Counting
                           Assembly (LDDCA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                       3-11
          3-50.            Test Card 1, Test 2, DCA and Time Base . . . . . . . . . . . . . . . .                                                                                                                       3-12
          3-55 .           Test Card 1, Test 3, Decade Counting Assembly (DCA) . . .                                                                                                                                    3-12
          3-60 .           Test Card 1, Test 4, Time Base Code . . . . . . . . . . . . . . . . . . . .                                                                                                                  3-13
          3-64.            Test Card 2, Test 5, Function Code and Display . . . . . . . . .                                                                                                                             3-14
          3-68.            Test Card 2, Test 6, Strobe Code I Display . . . . . . . . . . . . . .                                                                                                                       3-15
          3-73.            Test Card 2, Test 7, Strobe Code II Display . . . . . . . . . . . . . .                                                                                                                      3-15
          3-78.            Test Card 2, Test 8, Auto Sample Rate . . . . . . . . . . . . . . . . . .                                                                                                                    3-16
          3-83 .           Test Card 3, Test 9, Function Selector Main Gate
                           ROM Bits (LMGF, LTIF, HOPN) . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                                  3-17
          3-87 .           Test Card 3, Test 10, A4 Function Selector Time Base
                           Input ROM Bits (HTBA, HTBB, HTBO) . . . . . . . . . . . . . . . . . .                                                                                                                        3-18
          3-91 .           Test Card 3, Test 11, A4 Function Selector Totalize
                           ROM Bits and DVM Enable ROM Bit RL(LTOT),
                           R(LST), RL4(HDVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                      3-19
          3-95 .           Test Card 3, Test 12, A4 Function Selector High Speed
                           ROM Bits (IA, IB, IC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                      3-20
          3-99 .           Test Card 4, Test 13, Arming ROM Bits (A0, A1) and
                           ARM Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                               3-21
          3-103.           Test Card 4, Test 14, Auxiliary ROM Bits RL6(HC),
                           RL5(TIO), RL2(BIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                   3-22
          3-107.           Test Card 4, Test 15, C Module (ROM Bit
                           HEC and CARM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                    3-23
          3-111 .          Test Card 4, Test 16, Function Selector Digit
                           (FDA, FDB, FDC, FDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                         3-24
          3-116.           IC Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                     3-25
          3-118 .          Functional Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                 3-29
          3-120 .      Removal and Replacement Instructions . . . . . . . . . . . . . . . . . . . . .                                                                                                                   3-31
          3-122 .           Instrument Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                            3-31
          3-124.           Time Interval Module (Assemblies A10 and A19)
                            Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                                                             3-31
          3-126.           A16 Display Assembly Removal and Replacement . . . . . . . .                                                                                                                                 3-32

   IV     REPLACEABLE PARTS . . . . . . . . . . . . . . . . . . . .                     .    .    .    .    . .
                                                                                                            .   .   .    .    .    .           .     .
                                                                                                                                                     .   .       .     .     .     .     ..      .     . . . .          4-1
          4-1 .    Introduction . . . . . . . . . . . . . . . . . .                     .    .    .    .    .. ..   .    .    .    .           .     .
                                                                                                                                                     .   .       .       .   .     .     ..      .     . ...            4-1
          4-4.     Ordering information . . . . . . . . . .                             .    .    .    .    .. ..   .    .    .    .           .     . . .         .     .     .   .     ..      .     . ...            4-3
          4-6.     HP Part Number Organization . .                                      .    .    .    .    .. ..   .    .    .    .           .     . . .         .     .     .     .   ..      .     ....             4-3
          4-8 . Component Parts and Materials . . . . .                                 .    .    .    .    .. ..   .    .    .    .           .     . . .         .     .     .     .   ..      .     ....             4-3
          4-11 .       General Usage Parts . . . . . . . .                              . . . . . . . . . . . .                                . . . .           .     .     .     .     ..      .     ....             4-4
          4-13.        Specific Instrument Parts . . .                                   . .... . . .... .                                      . .. .             .     .     .     .   . .     .      ....            4-4
          4-15.    Factory Selected Parts . . . . . . . . . .                            . .... . . .....                                       . ...              .     .     .     .   . .       .    . ...           4-4

   V       MANUAL      CHANGES AND OPTIONS                         .   ...      .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .    .     .     .     .    .   .    .    .   .   .   .    5-1
           5-1 .       Introduction . . . . . . . . . . . .        .   ...      .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .    .     .     .     .    .   .    .    .   .   .   .    5-1
           5-3 .       Manual Changes . . . . . . . .              .   ...      .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .    .     .     .     .    .   .    .    .   .   .   .    5-1
           5-5 .            Newer Instruments . .                    . ...      .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .    .     .     .     .    .   .    .    .   .   .    .   5-1
           5-7.             Older instruments . . .                  . . ..     .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .    .     .     .     .    .   .    .    .   .   .    .   5-1
           5-9.        Options . . . . . . . . . . . . . . . . .     .  . . .   .   .    .    .    .    .   .   .    .    .    .   .   .   .     .   .   .   .    .     .     .     .    .   .    .    .   .   .    .   5-3
           5-11 .      Field Installation of Option                   010           .    .    .    .    .   .   .    .    .   .    .   .   .     .   .   .   .    .     .     .     .    .   .    .    .   .   .    .   5-3
Model 5328A
Tables, Figures



                                                   CONTENTS (Coned)
          Section   Title                                                                                                                                                                                             Page

             VI     SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                            . . .         . . . 6-1
                    6-1 .   Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                        . . .               6-1
                    6-3.    Schematic Diagram Symbols and Reference Designators                                                                                                                 . .         . . . 6-1
                    6-7.    Signal Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                              ...           . . . 6-1
                    6-9.    Identification Markings on Printed-Circuit Boards . . . . .                                                                                                       ...           . . . 6-1
                    6-14 .  Assembly Locations and Component Locators . . . . . . . . .                                                                                                       ...           . . . 6-2
                    6-16 .  Factory Selected Components . . . . . . . . . . . . . . . . . . . . . . .                                                                                         ...           . . . 6-2
                    6-18 .  Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                              ...           . . . 6-2




                                                                 TABLES

            1-1     Equipment Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
            1-2     Accessories Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
            1-3     Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

            3-1     Assembly Identification . . . . . . . . . . . . .                .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-1
            3-2     Recommended Test Equipment . . . . . .                           .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-2
            3-3     Preventive Maintenance . . . . . . . . . . . .                   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-2
            3-4     In-Cabinet Performance Check . . . . . .                         .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-4
            3-5     IC Troubleshooting, A1 Motherboard                               .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-26
            3-6     5328A Functional Signals . . . . . . . . . . . .                 .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .   .    .    .    .   .   .     3-30

            4-1     Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
            4-2     Manufacturers Code List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

            5-1     Manual Backdating                . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

            6-1     Signal Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4




                                                             FIGURES



            1-1     Model 5328A Universal Counter with Options                                                       . ... . . ........... ... . . .                                                                  1-0

            2-1     Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                                                             2-2

            3-1     A1 Motherboard Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . .                                                                                       .    .    .    .   .   . .   3-33
            3-2     A2 Power Supply Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . .                                                                                      .    .    .    .   .   . .   3-35
            3-3     A4 Function Selector Troubleshooting Flowchart . . . . . . . . . . . . . . .                                                                                         .    .    .    .   .   . .   3-37
            3-4     Standard A10 Synchronizer Assembly Troubleshooting Flowchart                                                                                                         .    .    .    .   .   ..    3-39
            3-5     Standard A19 Attenuator Assembly Troubleshooting Flowchart . .                                                                                                        .    .    .   .   .    ..   3-41
            3-6     A16 Display Assembly Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .                                                                                  .    .    .   .   .   ..    3-42
                                                                                                                                 Model 5328A
                                                                                                                                      Figures



                                        FIGURES (Cont'd)



6-1    Schematic Diagram Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             6-3
6-2    5328A Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6-7
6-3    5328A Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .      6-7
6-4    5328A Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    6-8
6-5    A1 Motherboard Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  6-9
6-6    A1 Motherboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               6-15
6-7    A2 Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                 6-16
6-8    A2 Power Supply Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            6-17
 6-9   A4 Function Selector Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .                             6-19
6-10   A4 Function Selector Assembly . . . . . . . . . . . . . . .                                                             6-21
6-11   Standard Time Interval Module (A10 and A19) Block Diagram . . . . . . . . . .
                                                                                 .                                             6-23
6-12   Standard A19 Attenuator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  6-25
6-13   Standard A10 Synchronizer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                    6-29
6-14   A16 Display Assembly Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                    6-31
6-15   A16 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      6-33
6-16   Option 010 A3' Oscillator Support Board and 10 MHz
       Oscillator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6-35
6-17   A1 Motherboard Interconnection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .                            6-37
Model 5328A
Safety Considerations




                                SAFETY CONSIDERATIONS
                                                    GENERAL

        This is a Safety Class I instrument. This instrument has been designed and tested according to I EC
        Publication 348, "Safety Requirements for Electronic Measuring Apparatus" .

        This manual contains information, cautions, and warnings which must be followed by the service
        person to ensure safe operation and to retain the instrument in safe condition .


                                                 WARNINGS
                                                     SAFETY

        If this instrument is to be energized via an autotransformer for voltage reduction, make sure the
        common terminal is connected to the earthed pole of the power source.
        BEFORE SWITCHING ON THIS INSTRUMENT, the protective earth terminals of this instrument
        must be connected to the protective conductor of the (mains) power cord. The mains plug shall
        only be inserted in a socket outlet provided with a protective earth contact . The protective action
        must not be negated by the use of an extension cord (power cable) without a protective
        conductor (grounding) .
        Make sure that only fuses with the required rated current and of the specified type (normal blow,
        time delay, etc .) are used for replacement . The use of repaired fuses and the short-circuiting of
        fuse holders must be avoided .
        Whenever it is likely that the protection offered by fuses has been impaired, the instrument must
        be made inoperative and be secured against any unintended operation .

                                                GROUNDING

       Any interruption of the protective (grounding) conductor (inside or outside the instrument) or
       disconnecting the protective earth terminal is likely to make this instrument dangerous .
       Intentional interruption is prohibited .

                                               HIGH VOLTAGE

       Warning - These servicing instructions are for use by qualified personnel only . To avoid
       dangerous electric shock, do not perform any servicing other than that contained in the
       operating instructions unless you are qualified to do so .
                                                                                            Model 5328A
                                                                                   Safety Considerations




                                        CAUTIONS
                               LINE VOLTAGE SELECTION

BEFORE SWITCHING ON THIS INSTRUMENT, make sure the instrument is set to the voltage of
the power source. Verify that the power transformer primary is matched to the available line
voltage . Verify that the correct fuse is installed .

                                       GROUNDING

BEFORE SWITCHING ON THIS INSTRUMENT, ensure that all devices connected to this
instrument are connected to the protective (earth) ground . (Grounding one conductor of a
two-conductor outlet is not sufficient .)



                             A       ATTENTION
This symbol :A     ,which appears on the instrument means: Read the instruction manual before
operating the instrument. If the instrument is operated without reading the instructions, it may
not operate correctly .
Model 5328A
General Information




               OPTION 010                                    OPTION 011
                  OVEN                                          HP-113
              OSCILLATOR                                     INTERFACE




                      OPTION 020 *     OPTION 021      OPTION 030 *              OPTION 040
                         DVM              DVM          CHANNEL C             UNIVERSAL MODULE




               *Service Information for these options is covered in separate service manuals.


                        Figure 1-1 . Model 5328A Universal Counter with Options
                                                                                               Model 5328A
                                                                                        General information


                                            SECTION I
                                GENERAL INFORMATION

1-1 .    SCOPE OF MANUAL

1-2 . This manual provides service information for the Hewlett-Packard Model 5328A Universal
Counter (including Option 010). A separate installation and Service Manual is provided for each
option supplied with the 5328A . Operating information for the 5328A (with options) is covered in
the 5328A Users Manual .

1-3 .    This manual is divided into five sections containing the following information :

        SECTION I GENERAL INFORMATION covers a description of the counter, options, equip-
        ment supplied, accessories available, and specifications .

        SECTION II THEORY OF OPERATION covers a description of the general operating princi-
        ples of the counter in reference to block and schematic diagrams of each assembly .

        SECTION III MAINTENANCE contains maintenance and service information including a list
        of assemblies, recommended test equipment, performance checks and adjustments .
        Troubleshooting procedures and flowcharts are included in this section .

        SECTION IV REPLACEABLE PARTS provides a complete list of replaceable parts and infor-
        mation for ordering parts.

        SECTION V MANUAL CHANGES AND OPTIONS contains information on manual changes
        and available options . Field installation of Option 010 Oven Oscillator is contained in this
        section .

        SECTION VI SCHEMATIC DIAGRAMS contains schematic diagrams and component loca-
        tors . A description of reference designators, signal mnemonics and printed-circuit card
        identification is included .

1-4.      DESCRIPTION

1-5. The standard 5328A mainframe measures frequency, period, period average, time interval,
time interval average, and ratio. A totalize function is also provided . The capabilities of the
instrument are expanded (as shown in Table 1-3) by installing the options described in paragraph
1-17. The 5328A provides an 8-digit (9 with Option 030) LED display, display storage, and leading
zero blanking . Decimal point and unit readouts are displayed automatically . Two independent
selectable input channels are provided for time interval measurements. Each input channel has
an attenuator, trigger slope selector, level control, ac-dc-coupli?ig, and an oscilloscope marker
output. Rear panel connectors provide a gate output, a time base output and an input for an
external frequency standard . An ARM switch on the rear panel allows arming by thesignal being
measured (switch OFF) or by another input signal (switch ON) .

1-6.      INSTRUMENT IDENTIFICATION

1-7. Hewlett-Packard instruments have a 2-section, 10-character serial number (OOOOA00000),
which is located on the rear panel. The 4-digit serial prefix identifies instrument changes . If the
serial prefix of your instrument differs from that listed on the title page of this manual, there are
differences between this manual and your instrument . Instruments having higher serial prefixes
are covered with a "Manual Changes" sheet included with this manual . If the change sheet is
missing, contact the nearest Hewlett-Packard Sales and Service Office listed at the back of this
manual .
Model 5328A
General Information


      1-8.     APPLICATIONS
      1-9 . Specific applications information is provided in Section IV of the 5328A Users Manual . The
      general application features of the 5328A are described in the following paragraphs .

      1-10. The high sensitivity, frequency range, and signal conditioning controls (see Table 1-3)
      make the 5328A ideally suited for a wide range of applications . The direct count feature of the
      5328A means that prescaling techniques are not used to achieve the 100 MHz frequency range (up
      to 512 MHz with Option 030). Direct count speed is required in high-speed totalizing or system
      applications . The dynamic range, input attenuators and trigger level range (seeTable 1-3) permit
      measurements to be made on virtually any signal .

      1-11 . The controlled "arming" feature of the 5328A is useful in applications such as burst fre-
      quency measurements, and pulse amplitude measurements .

      1-12. The optional integrating digital voltmeters measure trigger levels (critical in most time
      interval measurements) and external voltages . The hysteresis compensation feature of Option 040
      means that the trigger level does not need resetting when the slope switch changes the polarity.

      1-13 . The standard 5328A single-shot resolution of 100 ns meets the requirements for appli-
      cations such as mechanical and electromechanical device (relays) timing, time of flight measure-
      ments (ballistics), sonar ranging, radio ranging and navigation . The Option 040 provides
      increased resolution (to 10 ns) useful in applications such as computer/peripheral timing mea-
      surements, logic timing measurements, radar ranging and optical ranging . The delay feature of
      Option 040 allows unwanted signals to be ignored which would otherwise trigger the counter .

      1-14 . Using time interval averaging, time intervals as short as 100 ps, with resolution to 10 ps may
      be measured . Applications include cable length measurements, phase measurements, logic
      timing measurements, and integrated circuit propagation delay measurement .

      1-15 . Full bandwidth, sensitivity, and signal conditioning of the Channel A, B (and C for Option
      030) input amplifiers is provided for ratio, totalizing, and scaling measurements .

      1-16 . The 5328A with Option 011 HPAB Interface is able to output measurement data and be
      controlled (fully programmed) via the Hewlett-Packard Interface Bus (HPAB) . The 5328A is
      interfaced to HP-I13 compatible instruments, calculators, or computers by simply interconnecting
      with an HPAB cable.

      1-17.    OPTIONS

      1-18. Several options are available with the 5328A, as listed below . If purchased as part of an
      initial order, options are installed at the factory and the instrument is ready for operation when
      received . Procedures for field installation of an option are described in the installation and
      Service Manual supplied with each option (except for Option 010, Oscillator which is covered in
      this manual) . Options 907, 908 and 909 are ordered by option number if part of an initial order,
      otherwise by part number listed in Table 1-2 . The following options are available :

          a.    Option 010, High Stability Time Base. Oven oscillator with aging rate <5 x 10-10/day .

          b.    Option 011, HP-IB Interface . Allows 5328A to output data and be controlled via the HP
                Interface Bus.                                                      -

          c.    Option 020, Digital Voltmeter (DVM) . Single ended DVM for trigger level and external
                do voltage measurements .

          d.    Option 021, High Performance DVM . Floating high accuracy DVM for trigger level and
                external do voltage measurements .
                                                                                                Model 5328A
                                                                                         General information


    e.    Option 030, Channel C . Frequency measurements to 512 MHz ; 15 mV rms sensitivity;
          direct count .

    f.    Option 040, High Performance Universal Module. Same as standard 5328A but with 10 ns
          single shot time interval ; improved T.I . averaging ; improved T.I . accuracy ; measure-
          ments with delay; T.I . A=B marker ; hysteresis compensation ; switchable input
          impedance (1 MSl/50n) .

    9.    Option 907, Front Handle Kit.

    h.    Option 908, Rack Flange Kit (for instrument without handles) .

    i.    Option 909, Rack and Handle Kit.

1-19.    EQUIPMENT SUPPLIED AND ACCESSORIES AVAILABLE

1-20. Table 1-1 lists equipment supplied with the 5328A and Table 1-2 lists accessories available .
The Service Kits listed in Table 1-2 are described in Section 111 .


                                 Table 1-1 . Equipment Supplied
                             DESCRIPTION                                       HP PART NO.

              Detachable Power Cord 7'/2 ft (231 cm) long                         8120-1348




                                 Table 1-2. Accessories Available
                             DESCRIPTION                                       HP PART NO.

                 HP Interface Bus Interconnect Cable                          10631A, 3 ft long
                                                                                   (914 mm)
                                                                               10631B, 6 ft long
                                                                                  (1828 mm)
                                                                              10631C, 12 ft long
                                                                                  (3656 mm)


                           Front Handle Kit                                       5061-0088
           Rack Flange Kit (For instrument without handles)                       5061-0076
         Rack and Handle Kit (Installation instructions included                  5061-0082
                           with above kits)


                             Service Kits:
                       DVM Extender Board Kit                                    05328-82020
                    Function Selector and ROM Kit                                05328-82004
                  Extender Board, 18 pin (2 required)                            05328-62016




1-21 .   SPECIFICATIONS

1-22.    Table 1-3 lists detailed specifications for the 5328A including all options .
Model 5328A
General Information

                                                                     Table 1-3 . Specifications

                      INPUT CHARACTERISTICS                                                             PERIOD MEASUREMENTS

   Channel A and B (standard and option 040)                                        Period A (standard and option 040)
     Sensitivity :                                                                     Range: 0 - 10 MHz
       25 mV rms, 0-40 MHz (dc coupled)                                                Resolution : 100 ns to 1 s in decade steps
                    20 Hz-40 MHz (ac coupled)                                             (10 ins to 0.1 s with opt. 040)
                    200 kHz-40 MHz (ac coupled and 5052 with                           Accuracy : +1 count 



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