31R2-2GRR-112BA_CHG18.pdf

TO 31R2-2GRR-112

NAVELEX 0967-LP-428-1010

TECHNICAL MANUAL

SERVICE AND CIRCUIT DIAGRAMS

RADIO RECEIVER

AN/GRR-23(V) AND AN/GRR-24(V)

DISCLOSURE NOTICE - This information is furnished upon the condition that it will not be released to another nation without the specific authority of the Department of the Air Force of the United States, that it will be used for military purposes only, that individual or corporate rights originating in the information, whether patented or not, will be respected, that the recipient will report promptly to the United States, any known or suspected compromise, and that the information will be provided substantially the same degree of security afforded it by the Department of Defense of the United States. Also, regardless of any other markings on the document, it will not be downgraded or declassified without written approval of the originating United States agency.

DISTRIBUTION STATEMENT C - Distribution authorized to U.S. Government Agencies and their contractors (Administrative or Operational Use) (15 December 2006). Other requests for this document shall be referred to 406 SCMS/GULAC, Robins AFB, GA 31098. Questions concerning technical content shall be referred to WR-ALC/GRWBBC.

WARNING - This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C., Sec 2751, et seq.) or the Export Administration Act of 1979, as amended, Title 50, U.S.C., App. 2401, et seq. Violations of these export laws are subject to severe criminal penalties. Disseminate in accordance with provisions of DoD Directive 5230.25.

HANDLING AND DESTRUCTION NOTICE - Comply with distribution statement and destroy by any method that will prevent disclosure of contents or reconstruction of the document.

Published Under Authority of the Secretary of the Air Force

1 APRIL 1978 CHANGE 18 - 21 APRIL 2012

BASIC AND ALL CHANGES HAVE BEEN MERGED TO MAKE THIS A COMPLETE PUBLICATION.

NOTE: The portion of the text affected by the changes is indicated by a vertical line in the outer margins of the page. Changes to illustrations are indicated by shaded or screened areas, or by miniature pointing hands.

INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.

LIST OF EFFECTIVE PAGES

*Zero in this column indicates an original page.

USAF

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Dates of issue for original and changed pages are:

Title A B Added C Blank i - iv v vi - vii viii Blank 1-1 1-2 1-3 - 1-4 1-5 1-6 1-7 1-8 Blank 2-1 - 2-3 2-4 2-4A 2-4B Blank 2-5 - 2-6 3-1 3-2 - 3-3 3-4 3-5 3-6 3-6A 3-6B Blank 3-7 - 3-8 3-9 3-10 3-10A 3-10B Blank 3-11 3-12 3-12A Added 3-12B Blank 3-13 3-14

3-14A Added 3-14B Blank 3-14C 3-14D Blank 3-15 3-16 3-17 3-18 Blank 3-19 - 3-20 4-1 4-2 - 4-4 4-5 4-6 - 4-10 4-11 - 4-12 4-12A 4-12B Blank 4-13 - 4-14 4-14A Added 4-14B Blank 4-15 4-16 5-1 5-2 5-3 5-4 5-5 - 5-9 5-10 5-10A Added 5-10B Blank 5-11 5-12 - 5-16 5-16A - 5-16B 5-17 5-18 5-19 - 5-20 5-20A Added 5-20B Blank 5-21

5-22 5-23 - 5-24 5-25 Added 5-26 6-1 - 6-5 6-6 Blank 6-7 - 6-8 6-9 6-10 6-11 6-12 Blank 6-13 6-14 Blank 6-15 6-16 Blank 6-17 6-18 Blank 6-19 6-20 Blank 6-21 6-22 Blank 6-23 6-24 Blank 6-25 6-26 Blank 6-26A Added 6-26B Blank 6-27 6-28 Blank 6-29 6-30 Blank 6-31 6-32 Blank 6-33 6-34 Blank 6-35 6-36 Blank 6-37

Original. . . . . . . . . .0 . . . . . . . . 1 April 1978 Change . . . . . . . . . .1 . . . . 15 February 1979 Change . . . . . . . . . .2 . . . . . . . .15 July 1981 Change . . . . . . . . . .3 . . . . .15 October 1982 Change . . . . . . . . . .4 . . . . . . . 16 May 1983 Change . . . . . . . . . .5 . . . . . . . 1 March 1984 Change . . . . . . . . . .6 . . . . . . . . .2 July 1985 Change . . . . . . . . . .7 . . .27 November 1987 Change . . . . . . . . . .8 . . . . . . . . 1 June 1990 Change . . . . . . . . . .9 . . . . . . . . 7 June 1991

Change . . . . . . . . . . 10 . . . . . 27 March 1992 Change . . . . . . . . . . 11 . . . . . . . 20 July 1993 Change . . . . . . . . . . 12 . . . . . . 29 June 1994 Change . . . . . . . . . . 13 . . . . . . . 10 July 1996 Change . . . . . . . . . . 14 . . . . . . . 2 June 1997 Change . . . . . . . . . . 15 . . . . 26 January 1999 Change . . . . . . . . . . 16 . . . . 26 January 2003 Change . . . . . . . . . . 17 . . 15 December 2006 Change . . . . . . . . . . 18 . . . . . . 21 April 2012

A Change 18

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 160, CONSISTING OF THE FOLLOWING:

LIST OF EFFECTIVE PAGES - Continued

*Zero in this column indicates an original page.

Page *Change No. No.

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6-38 Blank 6-39 6-40 Blank 6-41 6-42 Blank 6-43 6-44 Index 1 - Index 3 Index 4 Blank

Change 18 B/(C blank)

TABLE OF CONTENTS

Chapter Page Chapter Page

LIST OF ILLUSTRATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . iii

LIST OF TABLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

1. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-1. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2. DESCRIPTION AND PURPOSE. . . . . . . . . . . . 1-1

1-16. LEADING PARTICULARS. . . . . . . . . . . . . . . . 1-1

1-18. CAPABILITIES AND

LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-20. EQUIPMENT SUPPLIED . . . . . . . . . . . . . . . . . 1-1

1-22. EQUIPMENT REQUIRED BUT

NOT SUPPLIED . . . . . . . . . . . . . . . . . . . . . . 1-1

2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

I INSTALLATION PLANNING . . . . . . . . . . . . . 2-1

2-2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

II LOGISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-6. RECEIVING DATA . . . . . . . . . . . . . . . . . . . . . . 2-1

2-8. UNPACKING DATA . . . . . . . . . . . . . . . . . . . . . 2-1

2-10. CABLE REQUIREMENTS . . . . . . . . . . . . . . . . 2-1

III INSTALLATION PROCEDURES. . . . . . . . . . . 2-4

2-12. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2-14. MOUNTING BRACKETS . . . . . . . . . . . . . . . . . 2-4

2-17. INPUT POWER CONNECTIONS. . . . . . . . . . . 2-4

2-20. TUNEUP AND TEST. . . . . . . . . . . . . . . . . . . . . 2-6

IV PREPARATION FOR

RESHIPMENT . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2-24. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

3. OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

I CONTROLS AND INDICATORS. . . . . . . . . . . 3-1

3-2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

II OPERATING INSTRUCTIONS . . . . . . . . . . . . 3-3

3-6. STARTING, OPERATING, AND

STOPPING PROCEDURE . . . . . . . . . . . . . . 3-3

3-7. STARTING PROCEDURE . . . . . . . . . . . . . . . . 3-3

3-8. TUNING PROCEDURE. . . . . . . . . . . . . . . . . . . 3-6

3-9. VHF CRYSTAL SELECTION G1,

G2, AND G3 OSCILLATOR . . . . . . . . . . . . . 3-6

3-10. UHF CRYSTAL SELECTION G1,

G2, AND G3 OSCILLATOR . . . . . . . . . . . . . 3-6

3-10A. VHF CRYSTAL SELECTION -

OSCILLATOR-MULTIPLIER . . . . . . . . . . . 3-6

3-10B. UHF CRYSTAL SELECTION -

OSCILLATOR-MULTIPLIER . . . . . . . . . . . 3-6

3-11. UHF RECEIVER TUNING AND

POST TUNING CHECKOUT . . . . . . . . . . . . 3-6

3-12. VHF RECEIVER TUNING AND

POST TUNING CHECKOUT . . . . . . . . . . . 3-12

3-13. SQUELCH CONTROL

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . 3-14C

3-15. OPERATING TWO RECEIVERS

FROM THE SAME

ANTENNA. . . . . . . . . . . . . . . . . . . . . . . . .3-14C

3-17. COLLOCATION

REQUIREMENTS . . . . . . . . . . . . . . . . . . . . 3-15

3-17A. STOPPING PROCEDURE. . . . . . . . . . . . . . . . 3-15

3-17B. G3 OSCILLATOR TUNING

PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . 3-17

3-17E. OSCILLATOR-MULTIPLIER

TUNING PROCEDURE . . . . . . . . . . . . . . . 3-17

3-17F. FREQUENCY FINE TUNE . . . . . . . . . . . . . . . 3-17

III EMERGENCY OPERATION . . . . . . . . . . . . . 3-19

3-18. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

3-20. CRYSTAL NOT AVAILABLE . . . . . . . . . . . . 3-19

3-21. AC POWER FAILURE . . . . . . . . . . . . . . . . . . 3-20

4. PRINCIPLES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . 4-1

I FUNCTIONAL SYSTEM

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-4. FUNCTIONAL DESCRIPTION . . . . . . . . . . . . 4-1

4-9. OPTIONAL CAPABILITIES. . . . . . . . . . . . . . . 4-1

II FUNCTIONAL OPERATION OF

ELECTRONIC CIRCUITS . . . . . . . . . . . . . . 4-2

4-11. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-13. ANTENNA COUPLER (VHF) A7. . . . . . . . . . . 4-2

4-15. ANTENNA COUPLER (UHF) A7. . . . . . . . . . . 4-2

4-17. TUNABLE FILTER (VHF) FL2 . . . . . . . . . . . . 4-2

4-19. TUNABLE FILTER (UHF) FL2 . . . . . . . . . . . . 4-3

4-21. OSCILLATOR MODULE A1

(G1, G2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-23. CRYSTAL OSCILLATOR. . . . . . . . . . . . . . . . . 4-3

4-24. BUFFER AMPLIFIER . . . . . . . . . . . . . . . . . . . . 4-3

4-25. OVEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-27. EXTERNAL OSCILLATOR

INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-27A. OSCILLATOR MODULE A1 (G3) . . . . . . . . . . 4-3

4-27C. CRYSTAL OSCILLATOR. . . . . . . . . . . . . . . . . 4-3

4-27D. BUFFER AMPLIFIER . . . . . . . . . . . . . . . . . . . . 4-3

4-27E. OVEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-27F. EXTERNAL OSCILLATOR INPUT. . . . . . . . . 4-4

4-27G. OSCILLATOR-SYNTHESIZER A1 . . . . . . . . . 4-4

4-27H. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-27I. REFERENCE GENERATOR. . . . . . . . . . . . . . . 4-4

4-27J. DIVIDER/CONTROL . . . . . . . . . . . . . . . . . . . . 4-4

4-27M. RF GENERATOR. . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-27P. PHASE COMPARATOR . . . . . . . . . . . . . . . . . . 4-5

4-27R. SWITCHING REGULATOR . . . . . . . . . . . . . . . 4-6

4-27S. OSCILLATOR-MULTIPLIER

A1 (G1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-27T. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-27U. OSCILLATOR-MULTIPLIER. . . . . . . . . . . . . . 4-6

4-27V. BUFFER AMPLIFIER . . . . . . . . . . . . . . . . . . . . 4-6

4-27W. OUTPUT AMPLIFIER. . . . . . . . . . . . . . . . . . . . 4-6

4-27X. METERING CIRCUIT . . . . . . . . . . . . . . . . . . . . 4-6

4-27Z. EXTERNAL INPUT. . . . . . . . . . . . . . . . . . . . . . 4-6

Change 18 i ii Change 18

TABLE OF CONTENTS - Continued

Chapter Page Chapter Page

4-28. MIXER/MULTIPLIER (VHF)

A2 (G1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4-32. MIXER/MULTIPLIER (VHF)

A2 (G2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4-36. MIXER/MULTIPLIER (UHF)

A2 (G1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-41. MIXER/MULTIPLIER (UHF)

A2 (G2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4-46. BUFFER AMPLIFIER . . . . . . . . . . . . . . . . . . . 4-10

4-49. NOISE LIMITER A5 . . . . . . . . . . . . . . . . . . . . 4-10

4-55. BANDPASS CRYSTAL

FILTER FL1. . . . . . . . . . . . . . . . . . . . . . . . . 4-11

4-56A. 50 KHZ CHANNEL SPACING

BANDPASS CRYSTAL FILTER . . . . . . . . 4-11

4-56B. 25 KHZ CHANNEL SPACING

BANDPASS CRYSTAL FILTER . . . . . . . . 4-11

4-56C. SECURE SPEECH MODULE . . . . . . . . . . . . . 4-11

4-57. INTERMEDIATE FREQUENCY

AMPLIFIER A6. . . . . . . . . . . . . . . . . . . . . . 4-11

4-60. PREAMPLIFIER

AF/AGC-SQUELCH A3 . . . . . . . . . . . . . . . 4-12

4-62. AUDIO PREAMPLIFIER . . . . . . . . . . . . . . . . 4-12

4-66. AGC AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . 4-12

4-67. SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12A

4-68A. PREAMPLIFIER AF/AGC

SQUELCH ITT PART NO.

800858661 . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

4-68B. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

4-68C. PREAMPLIFIER, AUDIO

FREQUENCY AND SQUELCH

CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

4-68D. AUDIO COMPRESSION

CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

4-68E. SQUELCH GATE . . . . . . . . . . . . . . . . . . . . . . 4-13

4-68F. AGC AMPLIFIERS . . . . . . . . . . . . . . . . . . . . . 4-13

4-68G. AGC AMPLIFIER (STANDARD

AUDIO FREQUENCY

WIDEBAND RESPONSE) . . . . . . . . . . . . . 4-14

4-68H. ACC AMPLIFIER (LOW AUDIO

FREQUENCY WIDEBAND

RESPONSE). . . . . . . . . . . . . . . . . . . . . . . . . 4-14

4-68J. SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14A

4-69. AUDIO FREQUENCY

AMPLIFIER A4. . . . . . . . . . . . . . . . . . . . .4-14A

4-71. MAIN AUDIO AMPLIFIER . . . . . . . . . . . . .4-14A

4-73. SECONDARY AUDIO

AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . .4-14A

4-74. SURGE PROTECTION . . . . . . . . . . . . . . . . .4-14A

4-75. POWER SUPPLY PSI . . . . . . . . . . . . . . . . . . . 4-15

4-77. REGULATOR CIRCUIT . . . . . . . . . . . . . . . . . 4-15

4-79. BATTERY CHARGING CIRCUIT . . . . . . . . . 4-15

4-80. SHORT CIRCUIT PROTECTION. . . . . . . . . . 4-15

4-81. AC POWER FAILURE . . . . . . . . . . . . . . . . . . 4-16

III FUNCTIONAL OPERATION OF

MECHANICAL ASSEMBLIES . . . . . . . . . 4-16

(Not Applicable)

5. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-5. FAULT DIAGNOSIS. . . . . . . . . . . . . . . . . . . . . 5-1

5-7. TEST POINT INDICATIONS . . . . . . . . . . . . . . 5-2

5-10. ADDITIONAL DIAGNOSTIC

PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . 5-2

5-11. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . 5-10

5-12. RF CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-13. NOISE LIMITER OR BUFFER

AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-14. IF AND CRYSTAL FILTER . . . . . . . . . . . . . . 5-10

5-15. AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-16. AUDIO CIRCUITS . . . . . . . . . . . . . . . . . . . . . 5-10

5-17. WIDE-BAND DATA OUTPUT AND

IF OUTPUT FUNCTIONS . . . . . . . . . . . . . 5-10

5-18. INTERCONNECTING WIRING. . . . . . . . . . . 5-10

5-19. MODULE REMOVAL AND

REPLACEMENT. . . . . . . . . . . . . . . . . . . . . 5-10

5-20. TOP COVER . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-21. TUNABLE FILTER . . . . . . . . . . . . . . . . . . . . . 5-10

5-22. ANTENNA COUPLER . . . . . . . . . . . . . . . . .5-10A

5-23. MIXER/MULTIPLIER AND

CRYSTAL CONTROLLED

OSCILLATOR. . . . . . . . . . . . . . . . . . . . . .5-10A

5-24. MIXER/MULTIPLIER. . . . . . . . . . . . . . . . . .5-10A

5-25. CRYSTAL CONTROLLER

OSCILLATOR/OSCILLATOR

SYNTHESIZER. . . . . . . . . . . . . . . . . . . . .5-10A

5-26. BANDPASS CRYSTAL FILTER . . . . . . . . .5-10A

5-27. NOISE LIMITER . . . . . . . . . . . . . . . . . . . . . .5-10A

5-28. INTERMEDIATE FREQUENCY

AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . 5-11

5-29. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . 5-11

5-30. AGC/SQUELCH . . . . . . . . . . . . . . . . . . . . . . . 5-11

5-31. AUDIO AMPLIFIER . . . . . . . . . . . . . . . . . . . . 5-11

5-32. ALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . .5-16A

5-33A. OSCILLATOR SYNTHESIZER . . . . . . . . . .5-16A

5-34. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . .5-16A

5-35. SPECIAL MAINTENANCE

INSTRUCTION . . . . . . . . . . . . . . . . . . . . . . 5-17

5-36. SYNTHESIZER SWITCHING

REGULATOR . . . . . . . . . . . . . . . . . . . . . . . 5-17

6. CIRCUIT DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . 6-1

ALPHABETICAL INDEX . . . . . . . . . . . . . . . . . . . . . . INDEX 1

LIST OF ILLUSTRATIONS

Number Title Page Number Title Page

1-1. Receivers, AN/GRR-23(V) and

AN/GRR-24(V) . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2-1. Typical View Relay Rack Mounting Bracket (Left Side) . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-2. Outline Dimensional Drawing. . . . . . . . . . . . . . . . . 2-3

2-3. Strapping Arrangement . . . . . . . . . . . . . . . . . . . . . . 2-4

2-4. Mounting Brackets . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

3-1. VHF Receiver and UHF Receiver Controls and Indicators . . . . . . . . . . . . . . . . . . . .3-4

3-1A. VHF Receiver and UHF Receiver Controls and Indicators (Oscillator-Multiplier Module Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3-2. UHF Tunable Filter Turns Versus Frequency . . . . . 3-9

3-3. VHF Tunable Filter Turns Versus Frequency . . . .3-13

3-4. Connection for Two Receivers Operating from Common Antenna . . . . . . . . . . . . . . . . . . .3-16

3-5. VHF Interconnecting Cable Length Vs Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

3-6. UHF Interconnecting Cable Length Vs Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

4-1. Functional Block Diagram VHF/UHF Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

5-1. Module Location and Identification . . . . . . . . . . .5-12

5-2. Installation Drawing for A1A5U1 (Early Configuration) . . . . . . . . . . . . . . . . . . . . .5-17

5-3. Test Set Up for WP Output . . . . . . . . . . . . . . . . . .5-26

5-4. Selectivity Test Set Up . . . . . . . . . . . . . . . . . . . . .5-26

6-1. Crystal Controlled Oscillator A1, Schematic Diagram (G1) . . . . . . . . . . . . . . . . . . . 6-4

6-2. Crystal Controlled Oscillator A1, Schematic Diagram (G2) . . . . . . . . . . . . . . . . . . . 6-5

6-2A. Crystal Controlled Oscillator A1, Schematic Diagram (G3) . . . . . . . . . . . . . . . . . . . 6-7

6-2B. Oscillator-Synthesizer . . . . . . . . . . . . . . . . . . . . . . . 6-8

6-2C. Oscillator-Multiplier A1, Schematic Diagram (G1) . . . . . . . . . . . . . . . . . . . 6-9

6-3. Mixer/Multiplier (VHF Receiver) A2, Schematic Diagram (G1) . . . . . . . . . . . . . . . . . . 6-10

6-4. Mixer/Multiplier (VHF Receiver) A2, Schematic Diagram (G2) . . . . . . . . . . . . . . . . . . 6-11

6-5. Mixer/Multiplier (UHF Receiver) A2, Schematic Diagram (G1) . . . . . . . . . . . . . . . . . . 6-13

6-6. Mixer/Multiplier (UHF Receiver) A2, Schematic Diagram (G2) . . . . . . . . . . . . . . . . . . 6-15

6-7. Amplifier, Buffer A5, Schematic Diagram . . . . . .6-17

6-8. Electrical Noise Limiter A5, Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . 6-19

6-9. Intermediate Frequency Amplifier A6, Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . 6-21

6-10. Preamplifier AF/AGC Squelch A3, Schematic Diagram (Early Configuration) (P/N 8004239G1) . . . . . . . . . . . . . . . . . . . . . . . . 6-23

6-10A. Preamplifier AF/AGC Squelch A3, Schematic Diagram (8008586G1) (Later Configuration) . . . . . . . . . . . . . . . . . . . . . 6-25

6-10B. Preamplifier, AF/AGC Squelch A3, Schematic Diagram (8008586G2) . . . . . . . . . 6-26A

6-11. Audio Frequency Amplifier A4, Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . 6-27

6-12. Power Supply PSI, Schematic Diagram . . . . . . . . 6-29

6-13. VHF Receiver, Schematic Diagram . . . . . . . . . . .6-31

6-14. UHF Receiver, Schematic Diagram . . . . . . . . . . .6-33

6-15. Synthesizer A1, Schematic Diagram. . . . . . . . . . . 6-35

6-16. Divider/Control A1A1, Schematic Diagram . . . . . 6-37

6-17. RE Generator A1A2, Schematic Diagram . . . . . . 6-39

6-18. Phase Comparator A1A3, Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . 6-41

6-19. Switching Regulator A1A5, Schematic Diagram (Early Configuration) . . . . . . . . . . . . . 6-43

6-19A. Switching Regulator A1A5, Schematic Diagram (Later Configuration) . . . . . . . . . . . . . 6-44

Change 18 iii

LIST OF TABLES

Number Title Page Number Title Page

I-1. Rivet Switch Radio Configuration Matrix . . . . . . . vi

1-1. Leading Particulars . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1-2. Capabilities and Limitations . . . . . . . . . . . . . . . . . 1-4

1-3. Equipment Supplied . . . . . . . . . . . . . . . . . . . . . . . 1-5

1-4. Equipment Required But Not Supplied . . . . . . . . 1-6

2-1. Unpacking Data. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3-1. Controls and Indicators . . . . . . . . . . . . . . . . . . . . . 3-1

3-2. Crystal Oscillator Frequency Determination . . . . 3-7

3-2A. Oscillator-Synthesizer Frequency Determination. . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3-2B. Crystal Oscillator Frequency Determination Oscillator-Multiplier . . . . . . . . . . . . . . . . . . . . 3-8

3-3. UHF Receiver Multiplier Injection Voltage Levels . . . . . . . . . . . . . . . . . . . . . . . . 3-10

3-4. VHF Receiver Multiplier Injection Voltage Levels . . . . . . . . . . . . . . . . . . . . . . .3-14C

5-1. Maintenance Test Equipment and Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2. Receiver Fault Isolation Indications . . . . . . . . . . . 5-3

5-3. Normal Front Panel Test Point Indications. . . . . . 5-4

5-4. Abnormal Test Point Indications . . . . . . . . . . . . . 5-9

5-5. Power Supply Fault Analysis . . . . . . . . . . . . . . . 5-13

5-6. RF Circuits Fault Analysis . . . . . . . . . . . . . . . . . 5-14

5-7. Noise Limiter/Buffer Amplifier Output Fault Analysis . . . . . . . . . . . . . . . . . . . . . . . . 5-15

5-8. IF and Crystal Filter Fault Analysis . . . . . . . . . . 5-16

5-9. Performance Test of VHF and UHF Receivers. . . . . . . . . . . . . . . . . . . . . . . . 5-18

6-1. Receiver Wire List . . . . . . . . . . . . . . . . . . . . . . . . 6-2 iv Change 18

T.O. 31 R2-2GRR- 1 12

NAVELEX 0967-LP428-10i'd

INTRODUCTION

This manual contains information to install, operate, and maintain Receiver, Radio AN/GRR-23(V) and Receiver, Radio ANIGRR-24(V).

Receivers, Radio AN/GRR-23(V) and AN/GRR-24(V) are identical in physical size and are designed for mounting in a standard 19-inch rack or cabinet.

Receiver, Radio AN/GRR-23(V) operates in the amplitude modulation (AM) mode. By selection of one of two intermediate frequency (IF) crystal filters, it is capable of receiving on any one of 680 channels spaced 50 kHz apart or on any one of 1360 channels spaced 2S klz apart between 116.00 and 149.95 MHz (VHF). By exchanging certain of the frequency determining modules and the selection of one of two IF crystal filters, the AN/GRR-24(V) configurations is established which provides receiving capa-bility on any one of 3500 channels spaced 50 kHz apart or on any one of 7000 channels spaied 25 kHz apart between

225.00 and 399.95 MHz (UHF).

Information in this manual is presented in six chapters and one index. Chapter I contains a description of the equipment from a functional standpoint including its capa-bilities and limitations. :-Information. is provided covering leading particulars, equipment supplied, and auxiliary equip-ment required but not supplied. Chapter 2 contains infor-mation for installation planning, logistics, installation pro-cedures, and preparation for reshipment. Chapter 3 describes all operating controls,. indicators, and interlocks, and pro-vides starting, operating, stopping, and emergency oper-ation procedures. Chapter 4 discusses the principles of operation on a functional system basis and also to an oper-ational or signal sequence flow. Chapter S includes main-tenance and alignment procedures. Chapter 6 contains circuit diagrams. The alphabetical index following Chapter 6 provides references to the appropriate paragraphs accord-ing to the subject covered. Table 1-1 is included here in the introduction as a cross-reference and indicates which mod-ules are used in each configuration of the Rivet Switch Radio System.

Changes to this manual will be indicated by a vertical line in the margin extending close to the entire area of the material affected and at the binding edge of the page. Change symbols are not used for:

a. Introductory material, indexes, and tabular data where the change cannot be identified.

b. Blank space resulting from the deletion of text or an illustration or a table.

c. Correction of minor inaccuracies, such as spelling, punctuation, relocation of material, etc., unless such correction changes the meaning of instructive infor-mation and procedures.

Reference is made to T.O. 00-25-234, General Shop Practice Requirements for the Repair, Maintenance and Test of Electronic Equipment for instructions concerning procedures and specific materials to be used in soldering this equipment.

The following publications are listed for reference and govern the manner of preparation, use of symbols, terms, reference designations, and abbreviations in this manual.

Military Specifications:

MIL-M-38730 (USAF)

MIL-T-9941 (USAF)

Manuals, Technical: General Requirement for Preparation Of.

Technical Manuals: Ground C-E Equipment Facility, Site, and System Preparation Of.

Military Standards:

MIL-STD-1 2

MIL-STD-1 5-1

ASA Y32.16-1965

Style Manual:

Library of Congress Cata Government Printing Office.

Abbreviations For Use on Drawings and in Technical Type Publications.

Graphical Symbols for Electri-cal and Electronic Diagrams.

Electrical and Electronics Re-ference Designations.

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1'.0. 31R2-2GRR-112

CHAPTER 1

GENERAL INFORMATION

1-1. INTRODUCTION. This chapter contains infor-mation concerning Receiver, Radio AN/GRR-23(V) and Receiver, Radio AN/GRR-24(V). A description of the equipment, its purpose and strategic mission, capabilities and limitations, leading particulars, and operation are dis-cussed in the following paragraphs.

1-2. DESCRIPTION AND PURPOSE

1-3. Receiver, Radio AN/GRR-23(V), hereinafter re-ferred to as the VHF receiver, is a single channel solid-state superheterodyne receiver that operates in the amplitude modulation (AM) mode in the radio frequency (rf) range of

116.00 to 149.95 MHz. It is capable of reception in this frequency range on any one of 680 channels spaced 50 kHz apart using the 50 kHz IF crystal filter or on any one of 1360 channels spaced 25 kHz apart using the 25 kHz IF crystal filter. The operating frequency is determined by either the oscillator crystal frequency selected or the dial setting of the oscillator-synthesizer.

1-4. Receiver, Radio AN/GRR-24(V), hereinafter re-ferred to as the UHF receiver, is a single channel solid-state superheterodyne receiver that operates in the amplitude modulation (AM) mode in the radio frequency (rf) range of

225.00 to 399.95 MHz. It is capable of reception in this frequency range on any one of 3500 channels spaced 50 kHz apart using the 50 kHz IF crystal filter or on any one of 7000 channels spaced 25 kHz apart using the 25 kHz IF crystal filter. The operating frequency is determined by either the oscillator crystal frequency selected or the dial setting of the oscillator-synthesizer.

1-5. An oscillator-synthesizer module is available which is directly interchangeable with and replaces the crystal oscillator module.

1-6. The VHF receiver, when equipped with the oscil-lator-synthesizer, has the potential capability of reception on any one of 2720 channels spaced 12.5 kHz between

116.00 and 149.9875 MHz, providing a narrowband IF crystal filter (not specified at this time) is selected to reduce channel interference.

1-7. The UHF receiver, when equipped with the oscil-lator-synthesizer, is capable of reception on any one of 7000 channels spaced 25 kHz between 225.00 and 399.975 MHz.

1-8. Frequency selection using the oscillator-synthesizer module is obtained by setting its front panel switches to the required input frequency to the mixer-multiplier module.

1-9. An oscillator-multiplier module is available which is directly interchangeable with the crystal-oscillator module or the oscillator-synthesizer module. This oscillator-multi-plier module differs from the crystal oscillator series in that it uses a fundamental crystal rather than a fifth overtone type and the crystal oven is eliminated. Frequency accuracy is determined by "pulling" the crystal. Tuning is accom-plished to the exact frequency by monitoring the frequency with a frequency counter.

1-10. The VHF receiver and the UHF receiver are desig-nated for world-wide deployment in the air-traffic control service and provide air-to-ground and point-to-point com-munications. See Figure 1-1.

1-11. The VHF receiver and the UHF receiver are de-signed to perform reliably in an air-ltraffic control environ-ment.

1-12. The VHF receiver and the UHF receiver are self-contained assemblies, each with its own integral power supply.

1-13. The VHF receiver and the UHF receiver have provision for use of an external precision oscillator in lieu of a crystal for frequency control.

1-14. The VHF receiver is designed with the capability to operate two receivers in parallel on a single antenna tuned to channels separated by a minimum of 1 MHz.

1-15. The UHF receiver is designed with the capability to operate two receivers in parallel on a single antenna tuned to channels separated by a minimum of 3 MHz.

1-16. LEADING PARTICULARS.

1-17. The physical and electrical characteristics of the VHF receiver and the UHF receiver are listed in Table 1-1.

1-18. CAPABILITIES AND LIMITATIONS.

1-19. The capabilities and limitations of the VHF re-ceiver and the UHF receiver are listed in Table 1-2.

1-20. EQUIPMENT SUPPLIED.

1-21. Equipment supplied comprising the VHF receiver and the UHF receiver is listed in Table 1-3.

1-22. EQUIPMENT REQUIRED BUT NOT SUPPLIED.

1-23. Tools and test equipment required for maintenance but not supplied with the VHF receiver and the UHF receiver are listed in Table 1-4.

CHANGE 2 1-1

T.O. 31R2-2GRR-112

,If'

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1-2 Change 1

TO. 31R2-2GRR-112

NAVELEX 0967-LP428-1010

Table 1-1. Leading Particulars

CHARACTERISTIC

PRIMARY INPUT POWER

REQUIREMENT

105, 120, 210, or 240 volts i 1O0%, single phase 47 hz to 420 hz, 50 watts maximum. If ac power fails, 24-volt lead acid battery is automatically switched in to provide emergency power for minimum period of 15 minutes.

PHYSICAL DESCRIPTION

Dimensions 3-1/2 inches high; 19 inches wide; 12-1/4 inches deep (Standard 19-inch rack or cabinet mounting).

Weight 22 pounds

CABLE REQUIREMENTS Provided by Air Traffic Control Central

ENVIRONMENTAL

Operating

Non-operating and Storage

Ambient Temperature: -29 0C to +600C Relative Humidity: 5% to 95% (± 5%) AC Line Voltage: lO5v ± 10%, 120v ± 10%;

210v ± 10%; 240v ± 10% AC Line Frequency: 47 hz to 420 hz DC: 22 to 30 volts Duty Cycle: Continuous unattended Altitude: 0 to 10,000 ft. MSL

Warm-up Time: 30 minutes maximum with crystal oscillator module; 5 minutes maximum with oscillator-synthesizer module.

Intermediate Frequency: 20.6 mhz Crystals: Nonstandard type, not supplied with equipment.

Stability to achieve frequency accuracy of ± 0.001% when qualified to MIL-C-3098 using procedures of

MIL-STD-683.

Frequency Accuracy (Oscillator-Synthesizer) + 0.0005% after 5 minute warm-up.

Ambient Temperature: -620C to +710 C Relative Humidity: 5% to 95% Barometric Pressure: 3.34 inches Hg to 31 inches Hg

CHANGE 2

NAVELEX 0967-LP428-1010

Table 1-2. Capabilities and Limitations

CHARACTERISTIC REQUIREMENTS

VHF RECEIVER

Frequency Range (Crystal Oscillator, Oscillator-Multiplier, and Oscillator- Synthesizer Modules)

116.00 to 149.95 MHz with 680 channels spaced 50 kHz,

116.00 to 149.975 MHz with 1360 channels spaced 25 kHz or 116.00 to 149.9875 MHz with 2720 channels spaced 12.5 kHz.

UHF RECEIVER

Frequency Range (Crystal Oscillator, Oscillator-Multiplier, and Oscillator- Synthesizer Modules)

225.00 to 399.95 MHz with 3500 channels spaced 50 kHz or 225.00 to 399.975 MHz with 7000 channels spaced 25 kHz.

VHF/UHF RECEIVER

Frequency Accuracy Crystal controlled; semiconductor proportionally con-trolled crystal oven. No more than ± 0.001% drift from operating frequency, after 30-minute warm-up. Oscillator synthesizer; no more than ± 0.0005% drift from operating frequency after 30-minute warm-up.

With a 3.0 gv signal (VHF and UHF) 30% ± 5% modulated at 1 kHz applied to antenna input from a 50-ohm source, and output of 100 milliwatts into a 600-ohm load with a 10 dB (minimum) signal-plus-noise-to-noise ratio is ob-tained.

Sensitivity

IF Bandwidth

Selectivity for 50 kHz Channel Spacing (Oscillator-Synthesizer)

Attenuation

6 dB 20 dB 40 dB 60 dB 80 dB

VHF

± 18 kHz Min.

± 27 kHz Max.

± 31 kHz Max.

± 35 kHz Max.

±100 kHz Max.

UHF

± 18 kHz Min.

± 27 kHz Max.

± 31 kHz Max.

± 35 kHz Max.* ±200 kHz Max.**

* Up to 350 MHz, + 40 kHz for frequenciesC> 350 MHz.

**Up to 350 MHz, ± 275 kHz for frequencies> 350 MHz.

IF Bandwidth

Selectivity for 25 kHz Channel Spacing (Oscillator Synthesizer)

Attenuation

6 dB 20 dB 40 dB 60 dB 80 dB

VHF

± 10 kHz Min.

± 17 kHz Max.

± 21 kHzMax.

± 27 kHz Max.

±100 kHz Max.

UHF

± 10kHzMin.

± 17 kHz Max.

± 21 kHz Max.

± 27 kHz Max.* ±200 kHz Max.**

* Up to 350 MHz, ± 30 kHz for frequencies > 350 MHz **Up to 350 MHz, ± 275 kHz for frequencies > 350 MHz

1-4 CHANGE 2

T.O. 3 1R2-2GRR-1 12

NAVELEX 0967-LI'428-1010

Table 1-2. Capabilities and Limitations (Cont)

CIIARACTERISTIC

Selectivity (50 kIlz Channel Spacing) (Oscillator Module or Oscillator-Alleultipliet

Module)

Selectivity (25 kllz Channel Spacing) (Oscillator Module or Oscillator-Multiplier

Module)

IF Output

REQUIREMENT

Attenuation 6 dB

80 dB

At tenua tion 6 dB

20 dB 40 dB 60 dB 80 dlB

Bandwidth I 18 kliz mi~ainiluml

140 kllz maximum

Bandwidth v 10 ktiz minimum ± 17 kllz maximum ±19 kIlz maximum ±22 kliz maximum ±25 kllz maximum

With 3.0 1iV signal 30% modulated produces a nominal output of 125 mV ac.

Two unbalanced ungrounded transformer outputs. Each 100 milliwatts into 600-ohm resistive load.

Audio Output

Audio Frequency Response

Automatic GCin Control

Automatic Gain Control Time Constanl

Squelch

Noise Limiter (When receiver contains noise limiter module.)

Buffer Amplifier (When receiver contains buffer amplifier module.)

Secure Voice Capability

Not more than +1 dB or -2 dB from 300 liz to 3000 Hiz.

Receiver output shall not vary more than 3 dB as a 6 puV input signal modulated 3 09/o ± 5% is increased to I volt.

100 millisecond attack; 100 millisecond decay maximum.

Receiver output muted pending carrier application of not greater than 3.0 pV with squelch sensitivity at maximum setting and not less than 50 pV with squelch sensitivity at minimum setting.

For use in installations where radar pulse interference is high; replaces buffer amplifier module.

Provides impedance matching and isolation of tie crystal filter (FL-4) from the mixer multiplier (A2).

Provides compatibility with the TSEC/KY-8, -28, AND -38 Speech Security Equipment when wide bandwidth crystal fil-ter is used. Also, provides baseband mod compatibility with TSEC/KY-57 when using pre-amplifier AGC/Squelch module 8008586G2 and IF amplifier module 800424702.

Table 1-3. Equipment Supplies

OFFICIAL

NOMENCLATURE

Receiver, Radio AN/GRR-23(V)

Receiver, Radio AN/GRR-24(V)

COMMON NAME

V11F Receiver

UFIF Receiver

Change 7 1-5

Table 1-3. Equipment Supplied (Cont.)

OFFICIAL

NOMENCLATURE

Interface Cable Kit ITT 8006148Gl (consisting of)

Clamp (I)

Connector (1)

Cable Assembly, Special Purpose (1) (consisting of)

COMMON NAME

MS3057-IOA

MS3108A 18-8S

80061 47G I

DESCRIPTION

Test Set, Radio AN/GRM-102 *

Plug-In Unit, Electronic *

Oscillator, Audio

Oscilloscope

Counter, Frequency Measuring

Plug-In Unit, Electronic

Generator, Sweep *

Voltmeter

Voltmeter, RF '

Connector (1) UP 131M

Marker Tubing Heat Shrinkable (1) 516665-20

Marker Tubing (1) 516665-21 Heat Shrinkable

Connector Receptacle 3-wire 502079-1 Twist Lock (1)

Lug Terminal Crimp 514273-2 Type (3)

Wire (AR) CO-03MGF3-16-0365 Slide Drawer Extension ITT P/N 512308-3

Table 1-4. Equipment Required But Not Supplied

MODEL OR TYPE

DESIGNATOR

8004801GI

Tektronix, IAI

Hewlett Packard 200AB

Tektronix 51 5A

Hewlett Packard 5245L

Hewlett Packard 5253B

Texscan, RS50

Hewlett Packard 427A

Boonton, 91CA

FEDERAL STOCK

NUMBER

6625-247-4713ZX

6625-796-4851

6625-126-0196

6625-079-3676

6625-914-6058

6625-226-3483

6625-411 -0887YA

6625- 135-0407YA

6625-973-2294

1-6 CHANGE 2

T.O. 3 IR2-2GRR-1 12

NAVELEX 096 7-LP4 28-1010

Table 14. Equipment Required But Not Supplied (Cont.)

MODEL OR TYPE FEDERAL STOCK

DESCRIPTION DESIGNATOR NUMBER

Oscilloscope Tektronix, RM547 6625-929-1895YA

Plug-In Unit, Electronic * Tektronix, IL20 6625-722-1694YA

Plug-In Unit, Electronic + Tektronix, ISI 6625-933-2719YA

Extension Cable Set ITT 8004810GI 5995-253-3994

Generator, Signal Hewlett Packard 608C/D 6625-553-1572

Meter, Vector Impedance Hewlett Packard 4815A 6625-061-0225

Distortion Analyzer llewlett Packard 334A 6625-871-8012

Voltmeter, Electronic Fluke 801 6625-753-2114

600 Ohml Headphones Telephonics NT 4998SA 5965-280-3629

Crystal Unit, Quartz CR-143 (1lolder Type HC-27/U) Not Assigned

Multimeter Mil-M-38706 6625-00-764-6106

Signal Generator Hewlett Packard 608E 6625-00-857-4352

Bench Top Receiver Test Generator * TS-3692/GRR 8121700G1 6625-01-038R7119

Tool Assy. Special Nut 8637112-10 5120-01-250-7244Z?

Note: ( * I For depot use only.

Change 7 1-7/(1-8 blank) x

CHAPTER 2

INSTALLATION

2-1. INTRODUCTION. Information and instructions necessary to unpack, install, make operable and prepare the VHF receiver and the UHF receiver for reshipment are included in this chapter. Section I provides installation planning information, Section 11 covers receipt and unpacking of the equipment. Section III provides installation procedures, and Section IV contains preparation for reshipment data.

SECTION I

INSTALLATION PLANNING

2-2. GENERAL.

2-3. The VHF receiver and the UHF receiver are installed in standard relay racks in the Air Traffic Control Central. See paragraph 2-11 for relay rack cable plug requirements, figure 2-1 for typical relay rack bracket mounting and figure 2-2 for outline dimensional drawing.

of the crystal filter (FL-I) from the mixer multiplier (A2). In areas of high radar pulse interference a noise limiter module may be substituted for the buffer amplifier module. The noise limiter module effectively blanks the radar pulses.

2-4. Normally the receivers contain a buffer amplifier module which provides impedance matching and isolation

SECTION 11

LOGISTICS

2.6. RECEIVING DATA.

2-7. The VHF receiver and the UHF receiver are packed in separate cleated 3/8-inch plywood boxes. Table

2-1 shows the packed and unpacked dimensions and weights of the receivers. The receivers are packed in snug fitting, expanded polystyrene containers, then completely sealed in a barrier pouch and packed in the plywood box.

Table 2-1. Unpacking Data

UNPACKED PACKED UNPACKED PACKED

QTY DESCRIPTION DIMENSIONS DIMENSIONS WEIGHT WEIGHT

I VHF Receiver

I UHF Receiver

3-1/2 in. high;

21 in. wide;

12-1/4 in. deep

3-1/2 in. high;

21 in. wide;

12-1/4 in. deep

9-1/2 in. high;

23 in. wide;

24 in. deep

9-1/2 in. high;

23 in. wide;

24 in. deep

2-8. UNPACKING DATA. 2-10. CABLE REQUIREMENTS.

2-9. Before unpacking the equipment, inspect the shipping containers for evidence of in-transit damage.

After the equipment is unpacked, inspect for obvious damage such as bent or broken components, connectors, etc. Check particularly for any obvious damage to the connectors at the rear of the receiver chassis.

2-11. Cable requirements for the receiver are provided as a part of the Air Traffic Control Central; however, the following specific cable plugs are required to properly install the receiver in the relay rack. i f the opt i ona I interface cable kit is not available.

2-1

22 lbs

22 lbs

38 lbs

38 lbs

T.O. 31R2,2GAJJ2

Mating p-u"g to J2

MS3108R-18-8S (Preferred)

MS3lo8A-18-8S (Alternate)

MS3108B-18-8s (Alternate)

MS31o6A-18-8S (Alternate)

MS31O6B-18-8S (Alternate)

MS3107A-18-8S (Alternate, Quick Disconnect)

MS3107B-18-8s (Alternate, Quick Disconnect)

FRONT

MOUNTING

AC power plug to Jl, Hubbell, AC Twist Lock Receptacle, No. 7484

Antenna Input Plug. Type N J13 (Not supplied in Interface Cable Kit.)

NV

Figure 2-1. Typical View Relay Rack Mounting Bracket (Left-Side)

2-2

NO. -t32

SCREW

EXISTN

CAD NET

HOLES3

LEFT HANO

RECEIVER

SLICE SECTION

SHOWN

e9

T.O. 311R2-2GRR-1 12

JI AC INPU+

.Jlu I1 r uUI fur A7J2 SECONDARY

AND COVER RECEIVER OUTPUT

J13 ANTENNAZAND SHORTING COVER

J 13 ANTENNA'

I - UCeT-_.'--

-- ,8Z50 it.020 ----------. ___ ___~ i l /. o~~~~~~~~~~~~e~~~~~~ c , 3 a~ ~ ~ ~ ~ ~~~~~

0.

I"

Figure 2-2. Outline Dimensional Drawing

2-3

3c r 4

SECTION III

INSTALLATION PROCEDURES

2-12. INSTALLATION

2-13. The VHF receiver and the UHF receiver are provided with a 3-section slide attached to each side of the chassis. The stationary member of each slide is provided with four 3/16-inch holes at one end and three 3/16-inch by 5/16-inch slots at the other end. These holes and slots are used for attaching the slides with machine screws to the corresponding brackets in the rack. See figure 2-1 for a typical view of the relay rack mounting bracket (left-side). Figure 2-2 is an outline dimensional drawing of the receivers.

2-14. MOUNTING BRACKETS. Figure 2-4 shows an outline drawing of a type A bracket required for CY-597 cabinet mounting. Four of these brackets are required for fixed installation.

2-15. Figure 2-4 also shows an out-line drawing of a type B bracket re-quired for MT-686 rack mounting. Four of these brackets are required for fixed installation.

2-16. Similar brackets may be fabri-cated for installation in other equip-ment enclosures by modifying the type A or type B brackets as appropriate.

2-17. INPUT POWER CONNECTIONS. The receivers are shipped from the factory with their input power connections strapped for 120 vac. To utilize an input voltage of 105. 210. or 240 volts it is necessary to change the strapping arrangement on the power supply. Remove the top cover by loosening six captive 6-32 flat head.

Phillips head retaining screws. Re-move power supply terminal strip top cover by loosening two 4-40 pan head, Phillips head screws.

CAUTION

Observe strapping arrange-ment on underside of cover and verify that input power transformers are correctly strapped for the specific installation voltage. Fig-ure 2-3 illustrates st:rap-ping arrangement. The ac line must always be con-nected to pins 1 and 5.

This a factory connection.

DO NOT CHANGE. Refer to Table 3-1 for the proper AC line fuse applicable to the voltage chosen.

Print voltage rating on space provided on receiver top covers, and replace power supply terminal strip cover and receiver top cover.

Figure 2-3. Strapping Arrangement

2-4 Change 8

I

I-AC LINE-1

J |~~ 4 | 5 |2| |1205V

FSM | I T 6 I 5 5 2 | A C

r N |5|4|5 AC 0JS 76 4321 '

1 .. STn2'1 , -40V

Li~§J~~z~z~m~mj AC

T.O. :31R2-2GRR-112

2-18. After the receiver slides have been firmly attached to the rack rails, connect the provided cables to their corresponding connectors at the rear of the chassis. Make sure the type N shorting connector is in place on A7J2; carefully slide the receiver into the rack observing that all cables have clearance and are not pinched or damaged.

The two slots at each end of the panel allow the entry of hold-down screws into the rack. This completes installation of the receivers.

NOTE

The following paragraph is applicable only to early configuration receivers containing AGC/Squelch Module, P/N 8004239G1. The new configuration AGC/Squelch Module, P/N 8008586G1 does not require the use of an exter-nal pad or attenuation network as defined in the following paragraph.

2-19. The audio compressor stage is factory aligned to operate at +20 dbm output. Connection to audio lines requiring a different output level must be accomplished by means of external pads.

The following is a diagram of a symmetrical 600 ohm "0" pad together with the formula for calcu-lating desired attenuation in db.

Change 15 2-4A/(24B Blank) l

- --- 6- - 6-3/8

I I.* rb..4- I - 1< f 7 _ i I- -i~~~~~ II " _ __I

I -r- -- --4--- c-n -n

L -- -i

±:Z)k:1j- kiztz_ v

- I

Type A Bracket

318 _ t 1/8 R

Typical Slot

NOTE; Half of Bracket to be bent 3/16 R as shown, other half to be opp. hand.

/-/8R

GENERAL NOTES

1. Break all sharp edges.

2. Matd: IO gage aluminum or

12 gage carbon sheet.

3. Finish: For steel only - primer coat zinc chromate 8010-297-0

3/16 R

_ , | l Y~-I/8 R

Type B Bracket

Figure 24. Mounting Brackets

._<A,$i~~~~---k

- l

2-20. TUNEUP AND TEST.

RI R2

R2 = 600 ( 4K

2K4l

RI = 600 ( K -I )

K = log I a) a = desired attenuation in db

Typical Values (use closest standard value nailable)

RI R2

Attenuation (db) K Ohms Ohms

I 3.16 5.6 10.0 17.7 31.6 56.0

0o

2-21. After completing the installation procedure of paragraph 2-12 and assuming the receiver has been properly tuned to the required operating frequency, perform the sating, operating and stopping procedure of paragraph 3-6 referring to the control and Indicator functions of table 3-1. It i necessary to perform a complete tuning procedure for each chang of channel or received frequency.

2-22. Both the VHF receiver and the UHF receiver have been completely aligned at the factory and should require no further alignment. If performance is not satisfactory after completing the Starting procedure of paragraph 3-6 recheck the tuning procedure of paragraph 3-8. If performance is still not satisfactory refer to the fault isolation and alignment procedures of Chapter 5 to locate and correct the' trouble, 2-23. When connecting two receivers for operation from one antenna perform the operating procedure in paragraph 3-15, and refer to figures 3-5 and 3-6 for proper cable length versus frequency

SECTION IV

PREPARATION FOR RESHIPMENT

2-24. GENERAL.

2-25. The preferred method of packing for reshipment is to use the original shipping containers, if available. If the original packing material is not available, repack the receivers in separate cartons using an over-wrap and suitable cushion-ing to protect the units.

NOTE

Slide drawer extensions and Cable Assembly ITT P/N 8006147G1 must be shipped with the radio set.

2-6

RI

CHAPTER 3

OPERATION

3-1. INTRODUCTION. This chapter contains operation information and instructions for the VHF receiver and the UHF receiver. All operation information is identical for both receivers. The chapter is divided into three sections. Section I illustrates and describes the functions of all con-trols, indicators, and interlocks. Section II provides operating instructions. Starting operating, tuning and stopping procedures are provided. Section IIF contains Emergency Operation procedures.

SECTION I

CONTROLS AND INDICATORS

3-2. GENERAL.

3-3. This section contains illustrations and tables to identify and describe the functions of all controls and indicators.

3-4. Controls and indicators are listed and defined in table 3-1 and illustrated in figure 3-1.

3-5. No interlocks are used in the receivers.

Table 3-1. Controls and Indicators

REF

CONTROL OR INDICATOR DES FUNCTION

POWER

ON-OFF

Toggle Switch

Indicator Lamp

AC FUSE (LEFT)

AC FUSE (RIGHT)

F02A250V3A BAT

I W RNIG I

Prior to any fuse replacement discon-nect input power connections.

AUDIO

SQUELCH ADJ

Screwdriver Adjust

ON-OFF

Toggle Switch

S2 When placed in ON position provides primary input power to receiver.

DS1 Illuminates when POWER ON-OFF switch is in the ON position.

F1 Single 1-Ampere fuse in 105-120 VAC Line.

Single .5-Ampere fuse in 210-240 VAC Line.

Indicating fuse holder glows when fuse is blown.

F2 Single 1-Ampere fuse in 105-120 VAC L Single .5-Ampere fuse in 210-240 VAC Indicating fuse holder glows when fuse is blown.

F3 Single 3-ampere fuse in positive of battery input. Indicating fuse holder glows when fuse is blown.

RI Sets squelch threshold level.

S1 When ON-OFF switch is in ON position squelch is operative. With switch in OFF.^ position squelch is disabled.

Change 14 3-1

CONTROL OR INDICATOR

MAIN ADJ

Screwdriver Adjust

PHONE ADJ

Knob Adjust

OUTPUT

RECEIVER INPUT

ANTENNA

The following controls are behind the front panel access door.

Tunable Filter Module

IN

Screwdriver Adjust

Table 3-1. Controls and Indicators (Cont.)

REF

DES FONCTION

R2

R3

J14 ill

J12

Cl

Adjusts level of audio output at rear panel connector.

Adjusts level of audio at front panel OUTPUT jack.

Provides audio output for headphone monitoring. (Mating plug to J14 is PJOS5B).

Provides front panel disconnect of antenna from receiver input. Provides for signal generator input when tuning receiver.

Tunes input cavity for peak output.

OUT

Screwdriver Adjust

Oscillator Module

OSc

C2 Tunes output cavity for peak output.

Screwdriver Adjust

Screwdriver Adjust

C3

C13

Tunes crystal oscillator for peak output.

Tunes buffer for peak output.

VHF UHF

Mixer/Muliplier Module

ANT

Screwdriver Adjust Cl C30 Tunes rf amplifier for peak output.

RF

C9 C35 Tunes mixer for peak output.

BUF

Scre%%driver Adjust

Table 3-1. Controls and Indicators (Cont.)

REF

CONTROL OR INDICATOR DES FUNCTION

VHF UHF

LEVEL ADJ

Screwdriver Adjust

*AMPL

Screwdriver Adjust

BUFFER

Screwdriver Adjust

QUAD (UHF)

DBLR (VHF)

Screwdriver Adjust Rear Panel Connectors

AC Input Signal IF Output Antenna Input Secondary Receiver Output

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