RACAL AN-PRC-139 maintenance instructions

TO 31R2-2PRC139-1

OPERATION AND MAINTENANCE INSTRUCTIONS

WITH ILLUSTRATED PARTS BREAKDOWN

ORGANIZATIONAL LEVEL

RADIO SET AN/PRC-139(C)

(HAND-HELD RADIO)

INCLUDING RECEIVER-TRANSMITTER SET,

RADIO RT-1695/TRC199,

RECEIVER-TRANSMITTER SET, RADIO RT-1696/U(C),

PROGRAMMER UNIT, FREQUENCY, RADIO MX-11531/U,

(FREQUENCY FILL DEVICE),

BATTERY CHARGERS AND BATTERY RECONDITIONER

RACAL COMMUNICATIONS, INC.

5 RESEARCH PLACE

ROCKVILLE, MD 20850

CONTRACT NO: F19628-91-D-0012

DISTRIBUTION STATEMENT B - Distribution authorized to U.S. Government agencies only for administrative or
operational use 15 June, 1993. Other requests for this document shall be referred to Sacramento ALC/TILBE, 3200
Peacekeeper Way, Suite 1, McClellan AFB, CA 95652-1026.

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.

HANDLING AND DESTRUCTION NOTICE - Handle in compliance 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

15 JUNE 1993

CHANGE 2 - 15 MARCH 1995

LIST OF EFFECTIVE PAGES

TO 31R2-2PRC139-1

INSERT LATEST CHANGE PAGES, DESTROY SUPERSEDED PAGES.

NOTE: The portion of the text affected by the changes is indicated by a vertical line in the outer

DATES OF ISSUE FOR ORIGINAL AND CHANGED PAGES ARE:

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 150 CONSISTING OF THE FOLLOWING:

Page * Change
No. No.

Title page 2
A 2
B 1
i 0
ii - iii 1
iv - v 0
vi - vii 1
viii - ix 0
x blank 0
xi 1
1-0 0
1-1 - 1-2 1
1-3 0
1-4 - 1-6 1
1-7 - 1-8 0
1-9 1
1-10 0
2-1 - 2-2 0
2-3 1
2-4 - 2-5 0
2-6 blank 0
3-1 - 3-3 0
3-4 blank 0
4-1 - 4-10 0
4-11 - 4-16 1
4-17 blank 1
5-1 1
5-2 0
5-3 - 5-7 1
5-8 blank 0
6-1 - 6-12 0
7-1 - 7-15 0

margin of the page. Changes to illustrations are indicated by a vertical line adjacent to
the illustration identification number.

ORIGINAL...........0 ......... 15 JUNE 1993

CHANGE ..............1 ......... 10 AUGUST 1994

CHANGE .............2 ......... 15 MARCH 1995

Page * Change
No. No.

8-1 0
8-2 blank 0
FP-1 0
FP-2 blank 0
FP-3 0

Page * Change
No. No.

Title page (App C) 0
C1-1 - C1-4 0
GLOSSARY 1 - 2 0
INDEX 1 - 5 0

INDEX 6 blank 0
FP-4 blank 0
FP-5 0
FP-6 blank 0
FP-7 0
FP-8 blank 0
FP-9 0
FP-10 blank 0
FP-11 0
FP-12 blank 0
Title page (App A) 0
A1-1 - A1-14 0
A2-1 - A2-3 0
A2-4 blank 0
A3-1 - A3-4 0
A4-1 - 0
Title page (App B) 0
B1-1 - B1-7 1
B1-8 blank 0
B2-1 - B2-2 0
B3-1 - B3-2 0
B3-3 2
B3-4 - B3-6 0
B3-7 - B3-9 2
B3-10 - B3-11 0
B3-12 2
B3-13 0
B3-14 blank 0

7-16 blank 0

Change 2

* Zero in this column indicates an original page.

USAF

A

RECORD OF CHANGES

TO 31R2-2PRC139-1

CHANGE

NO.

1 10 August 1994 Updated/Included more information in certain

2 15 March 1995 Updated Appendix B - Battery Chargers

DATE TITLE OR BRIEF DESCRIPTION ENTERED BY

sections.

Change 2B

TO 31R2-2PRC139-1

TABLE OF CONTENTS

Chapter Page

LIST OF ILLUSTRATIONS.......................................................................................................................... v

LIST OF TABLES......................................................................................................................................... vi

SAFETY SUMMARY.................................................................................................................................. vii

FOREWORD................................................................................................................................................. xi

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

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

1-1.1 Equipment Function and Purpose........................................................................................... 1-1

1-1.2 Equipment Description........................................................................................................... 1-1

1-2 LEADING PARTICULARS.................................................................................................. 1-7

1-3 CAPABILITIES AND LIMITATIONS................................................................................. 1-7

1-4 EQUIPMENT SUPPLIED. .................................................................................................... 1-8

1-5 OTHER EQUIPMENT. ......................................................................................................... 1-9

1-6 SPECIAL TOOLS AND TEST EQUIPMENT.................................................................... 1-10

1-7 RELATED TECHNICAL MANUALS................................................................................ 1-10

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

2-1 INTRODUCTION.................................................................................................................. 2-1

Section I. INSTALLATION LOGISTICS.................................................................................................. 2-1

2-2 SITE PREPARATION........................................................................................................... 2-1

2-3 UNPACKING AND INSPECTION....................................................................................... 2-1

2-4 HOUSING.............................................................................................................................. 2-3

2-5 RECEIVING DATA. .............................................................................................................2-3

2-6 MATERIAL HANDLING. .................................................................................................... 2-3

2-7 BUILDINGS AND OTHER SUPPORTING STRUCTURES............................................... 2-3

Section II. INSTALLATION PROCEDURES........................................................................................... 2-4

2-8 TOOLS AND EQUIPMENT REQUIRED FOR FIELD INSTALLATION.......................... 2-4

2-9 INSTALLATION SEQUENCE. ............................................................................................ 2-4

CHAPTER 3 . PREPARATION FOR USE AND RESHIPMENT..................................................................... 3-1

3-1 INTRODUCTION.................................................................................................................. 3-1

Section I. PREPARATION FOR USE .......................................................................................................3-1

3-2 INSPECTION. ....................................................................................................................... 3-1

3-3 POST-INSTALLATION CHECKOUT. ................................................................................ 3-1

3-3.1 Alignment and Adjustment..................................................................................................... 3-1

3-3.2 Post-Installation Checkout Procedures................................................................................... 3-1

Section II. PREPARATION FOR RESHIPMENT..................................................................................... 3-1

3-4 PREPARING UNIT FOR RESHIPMENT............................................................................. 3-1

3-5 PACKING. ............................................................................................................................. 3-1

3-6 HANDLING AND STORAGE.............................................................................................. 3-1

3-6.1 Protective Measure for Electrical Connectors........................................................................ 3-2

3-6.2 Preparation for Shipment and Storage.................................................................................... 3-2

3-6.3 Handling................................................................................................................................. 3-2

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

Section I. CONTROLS AND INDICATORS..............................................................................................4-1

4-1 INTRODUCTION.................................................................................................................. 4-1

4-2 CONTROLS AND INDICATORS. ....................................................................................... 4-1

4-2.1 Top Panel Controls and Indicators. ........................................................................................ 4-1

4-2.2 Audible Warning Tones and Alarms. ..................................................................................... 4-4

4-2.3 Side Panel Battery Latch and Switches. .................................................................................4-5

4-2.4 Connectors.............................................................................................................................. 4-7

Section II. OPERATING INSTRUCTIONS .............................................................................................. 4-8

4-3 INITIAL POWER-UP PROCEDURE. .................................................................................. 4-8

Change 1ii

TO 31R2-2PRC139-1

TABLE OF CONTENTS

4-4 HAND-HELD RADIO PROGRAMMING. ...........................................................................4-8

4-4.1 Programming Requirements Matrix........................................................................................4-8

4-4.2 Programmable Features.........................................................................................................4-10

4-4.3 Loading Programming Information.......................................................................................4-11

4-5 LOADING COMSEC KEYS................................................................................................4-11

4-5.1 Loading Key From KOI-18 Into Hand-Held Radio. .............................................................4-12

4-5.2 Loading Key From KYK-13 Into Receiver-Transmitter.......................................................4-13

4-5.3 Loading Key From AN/CYZ-10 Into Hand-Held Radio.......................................................4-13

4-6 TRANSMITTING MESSAGE. ............................................................................................4-13

4-7 RECEIVING MESSAGE. ....................................................................................................4-14

4-8 SELECT SCAN MODE........................................................................................................4-14

4-9 SELECTING PRE-PROGRAMMED CHANNELS.............................................................4-15

4-10 SELECTING KEYS. ............................................................................................................4-15

4-11 CLONE HAND-HELD RADIO PROGRAMMING INFORMATION................................4-15

4-12 KEY ZEROIZE.....................................................................................................................4-16

4-13 EQUIPMENT SUTDOWN. .................................................................................................4-16

4-14 ELECTROMAGNETIC PULSE PROTECTION.................................................................4-16

4-14.1 EMP Susceptibility. ..............................................................................................................4-16

4-14.2 EMP Protective Measures.....................................................................................................4-16

4-15 NUCLEAR, BIOLOGICAL, AND CHEMICAL (NBC) CONTAMINATION...................4-16

CHAPTER 5 . THEORY OF OPERATION........................................................................................................ 5-1

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

5-2 FUNCTIONAL SYSTEM(S) OPERATION..........................................................................5-1

5-2.1 Transceiver Module. ...............................................................................................................5-2

5-2.2 Hand-Held Radio Chassis Assembly.......................................................................................5-2

5-2.3 Rechargeable NiCad Battery...................................................................................................5-2

5-2.4 Non-Rechargeable Lithium Battery. .......................................................................................5-2

5-2.5 Palm Handset. .........................................................................................................................5-3

5-2.6 Hand-Held Radio Accessories. ...............................................................................................5-3

5-3 TACTICAL BAND (30-88 MHz) TRANSCEIVER MODULE. ...........................................5-3

5-4 HIGH BAND (136-174 MHz) TRANSCEIVER MODULE..................................................5-5

5-5 ULTRA HIGH FREQUENCY (UHF) (403-470 MHz) TRANSCEIVER MODULE............5-6

5-6 CONTROL CIRCUIT CARD ASSEMBLY (CCA)...............................................................5-7

5-7 CRYPTO CIRCUIT CARD ASSEMBLY (CCA)..................................................................5-7

CHAPTER 6 . MAINTENANCE .......................................................................................................................... 6-1

6-1 GENERAL..............................................................................................................................6-1

6-2 OPERATIONAL CHECKOUT..............................................................................................6-1

6-2.1 Power-up Verification.............................................................................................................6-1

6-2.2 Clear Mode Reception Test. ...................................................................................................6-2

6-2.3 Clear Mode Transmission Test. ..............................................................................................6-2

6-2.4 Whisper Mode Check. ............................................................................................................6-2

6-2.5 Channels 2 through 14 Functional Check. ..............................................................................6-3

6-2.6 Encrypted Reception Test.......................................................................................................6-3

6-2.7 Encrypted Transmission Test..................................................................................................6-3

6-2.8 Key Retention Check. .............................................................................................................6-3

6-2.9 Key Zeroize Check..................................................................................................................6-4

6-2.10 Battery Check..........................................................................................................................6-4

6-2.11 Scan Mode Check. ..................................................................................................................6-4

6-3 SERVICING. ..........................................................................................................................6-4

6-3.1 Servicing Intervals. .................................................................................................................6-4

6-3.2 Inspection................................................................................................................................6-5

6-3.3 Preventive Maintenance..........................................................................................................6-5

6-4 TROUBLESHOOTING..........................................................................................................6-6

6-5 REMOVAL/REPLACEMENT PROCEDURES. .................................................................6-11

6-5.1 Removal/Replacement Procedures - Operator. .....................................................................6-11

6-5.2 Removal/Replacement Procedures - Repair Specialist. ........................................................6-12

iii

TO 31R2-2PRC139-1

TABLE OF CONTENTS

CHAPTER 7 ILLUSTRATED PARTS BREAKDOWN...................................................................................... 7-1

Section I. INTRODUCTION...................................................................................................................... 7-1

7-1 GENERAL ............................................................................................................................. 7-1

7-2 MAINTENANCE PARTS LIST............................................................................................ 7-1

7-3 NUMERICAL INDEX........................................................................................................... 7-2

7-4 REFERENCE DESIGNATION INDEX................................................................................ 7-3

7-5 ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES. .....................................7-3

7-6 CAGE CODE SUMMARY.................................................................................................... 7-4

Section II. MAINTENANCE PARTS LIST............................................................................................... 7-9

Section III. NUMERICAL INDEX .......................................................................................................... 7-14

Section IV. REFERENCE DESIGNATION INDEX ............................................................................... 7-15

Section V. COMMON BULK ITEMS LIST ............................................................................................ 7-15

CHAPTER 8 . CIRCUIT DIAGRAMS................................................................................................................. 8-1

8-1 SCOPE. ..................................................................................................................................8-1

GLOSSARY

ALPHABETICAL INDEX

Change 1iv

TO 31R2-2PRC139-1

LIST OF ILLUSTRATIONS

Figure Page

Figure 1-1. Radio Set AN/PRC-139(C).....................................................................................................................1-0

Figure 1-2. Radio Receiver-Transmitter Set RT-1696/U(C) or RT-1695/TRC-199..................................................1-2

Figure 1-3. Palm Handset ..........................................................................................................................................1-3

Figure 1-4. Handset H-250/U ....................................................................................................................................1-3

Figure 1-5. Headset, Ear Microphone........................................................................................................................1-4

Figure 1-6. Battery Analyzer/Reconditioner..............................................................................................................1-5

Figure 1-7. Multiple and Single Battery Chargers.....................................................................................................1-6

Figure 2-1. Packaging Diagram for the Radio (Typical)............................................................................................2-2

Figure 2-2. Receiver-Transmitter Battery and Antenna Installation ..........................................................................2-5

Figure 4-1. Top Panel Controls and Indicators..........................................................................................................4-1

Figure 4-2. Side Panel Battery Latch and Switches...................................................................................................4-5

Figure 4-3. Connectors ..............................................................................................................................................4-6

Figure 5-1. Hand-Held Radio, Simplified Block Diagram ........................................................................................5-1

Figure 7-1. Radio Set AN/PRC-139 (C)....................................................................................................................7-8

Figure 7-2. Radio Receiver-Transmitter Set RT-1696/U(C) ...................................................................................7-10

Figure 7-3. Programmer Unit, Frequency, Radio MX-11531/U..............................................................................7-12

FO-1 Tactical Band (30-88 MHz), Functional Block Diagram .......................................................................... FP-1

FO-2 High Band (136-174 MHz), Functional Block Diagram...........................................................................FP-3

FO-3 Ultra High Band (403-470 MHz), Functional Block Diagram.................................................................. FP-5

FO-4 Control CCA, Interconnection Block Diagram .........................................................................................FP-7

FO-5 Crypto CCA, Interconnection Block Diagram...........................................................................................FP-9

FO-6 Interconnection Diagram, Radio Set AN/PRC-139 (C)...........................................................................FP-11

Figure A1-1. Display and Keys...............................................................................................................................A1-2

Figure A1-2. Available Menus................................................................................................................................A1-5

Figure A2-1. Frequency Fill Device, Simplified Block Diagram ...........................................................................A2-2

Figure A2-2. Microprogrammer CCA, Simplified Block Diagram ........................................................................A2-6

Figure B3-1. Charger Assembly, Single .................................................................................................................B3-6

Figure B3-2. Charger Assembly, Multiple.............................................................................................................. B3-8

Figure B3-3. Battery Reconditioner......................................................................................................................B3-10

v

TO 31R2-2PRC139-1

LIST OF TABLES

Table Page

Table 1-1. Receiver-Transmitter Configuration Vs Frequency Band......................................................................... 1-2

Table 1-2. Leading Particulars ................................................................................................................................... 1-7

Table 1-3. Capabilities and Limitations ..................................................................................................................... 1-7

Table 1-4. Equipment Supplied.................................................................................................................................. 1-9

Table 1-5. Equipment Required But Not Supplied .................................................................................................... 1-9

Table 1-6. Optional Equipment.................................................................................................................................. 1-9

Table 1-7. Related Technical Manuals..................................................................................................................... 1-10

Table 2-1. Items Required to Complete Installation................................................................................................... 2-3

Table 4-1. Description of Top Panel Controls and Indicators.................................................................................... 4-2

Table 4-2. Description of Audible Warning Tones and Alarms................................................................................. 4-4

Table 4-3. Description of Side Panel Battery Latch and Switches............................................................................. 4-5

Table 4-4. Connectors................................................................................................................................................ 4-7

Table 4-5. Frequency Fill Device Programming Requirements Matrix ..................................................................... 4-9

Table 4-6. Programmable Features .......................................................................................................................... 4-10

Table 6-1. Recommended Service Intervals............................................................................................................... 6-5

Table 6-2. Organizational Maintenance Guide - Operator ......................................................................................... 6-7

Table 6-3. Organizational Maintenance Guide - Repair Specialist ............................................................................ 6-9

Table 6-4. Cross-Reference to Removal/Replacement Procedures.......................................................................... 6-11

Table 7-1. Radio Set AN/PRC-139 (C)...................................................................................................................... 7-9

Table 7-2. Radio Receiver-Transmitter Set RT-1696/U(C) ..................................................................................... 7-11

Table 7-3. Programmer Unit, Frequency, Radio MX-11531/U................................................................................ 7-13

Table A1-1. Description of Controls and Indicators .............................................................................................. A1-1

Table A3-1. Recommended Service Intervals........................................................................................................ A3-2

Table A3-2. Organizational Maintenance Guide - Operator .................................................................................. A3-3

Table B3-1. Charger Assembly, Single.................................................................................................................. B3-7

Table B3-2. Charger Assembly, Multiple .............................................................................................................. B3-9

Table B3-3. Battery Reconditioner ...................................................................................................................... B3-11

Change 1vi

TO 31R2-2PRC139-1

SAFETY SUMMARY

The following are general safety precautions that are not related to any specific procedure, and do not appear elsewhere
in this manual. These Safety Summaries are recommended precautions that all personnel must understand and apply
during any given phase of operation and maintenance. Each chapter has other specific warnings and cautions.

WARNING

KEEP AWAY FROM LIVE CIRCUITS

Personnel must at all times observe all safety regulations. Do not replace components or make
adjustments inside equipment with power turned on. Under certain conditions, dangerous
potentials may exist when the power switch is in the off position due to charges retained by
capacitors. To avoid injury, always remove power and discharge and ground a circuit before
touching it.

WARNING

Do not operate the AN/PRC-139(C) or charge batteries within 10 feet of fuel vent. This could
result in an explosion.

Change 1

vii

TO 31R2-2PRC139-1

WARNING

LITHIUM BATTERIES

Lithium oxide batteries may be used in this equipment. They are potentially hazardous if misused or tampered with
before, during or after discharge. The following precautions must be strictly observed to prevent possible injury to
personnel or equipment damage.

Do not heat, incinerate, crush, puncture, disassemble, or otherwise mutilate the batteries.

short-circuit, recharge, or bypass internal fuse.

Do not

Do not store batteries in equipment during long periods of non-use (in excess of 30 days).

Turn off the equipment immediately if you detect battery compartment becoming unduly hot, hear battery cells

venting (hissing sounds), or smell irritating sulfur dioxide gas.

RESUSCITATION

Personnel working with or near high voltages should be familiar with modern methods of resuscitation. Such information
may be obtained from the Director of Base Medical Services.

Page

4-8 WARNING - Do not change battery within 10 feet of open fuel/fuel vents or operate the radio within 10 feet of

aircraft fuel vent outlets, open port refueling receptacles, or fuel spills.

2-1 CAUTION - Exercise care when removing from packing material in order to prevent damage to the unit.

3-2 CAUTION - Never apply pressure sensitive tape directly to connectors. This could damage connector pins.

3-2 CAUTION - Package all ESD sensitive assemblies in ESD bags before shipping or storing.

viii

TO 31R2-2PRC139-1

Page

3-2 CAUTION - Rough handling may cause damage to electronic assemblies.

3-2 CAUTION - Electronic assemblies containing solid-state devices are susceptible to damage from static electrical

discharges. Place items in ESD bags. Wear protective clothing and grounded wrist straps.

3-2 CAUTION - Forcing any misaligned electronic assembly into position may result in bent or broken pins.

3-3 CAUTION - When replacing an electronic assembly, be careful that the tool employed does not inadvertently

press against leads, pins, or other parts that are easily bent.

3-3 CAUTION - When handling an assembly that has been removed from its chassis, be careful not to press against

the leads and pins. When removing an assembly, be sure to pull it straight out from the equipment. Do not cock,
twist, pry, or carelessly jerk an electronic assembly to remove it from the mounting or connector.

3-3 CAUTION - The hand-held radio contains components that are susceptible to damage by static electrical charges.

Disassembly of the hand-held radio should only be done at a properly grounded work station.

4-12 CAUTION - Take care not to pull the multiple punched hole section of the tape through at this time.

6-10 CAUTION - Use care in removing and replacing modules and CCAs to prevent damage to pins and sockets.

6-10 CAUTION - The modules and CCAs in the receiver-transmitter contain parts that are sensitive to damage by

electrostatic discharge (ESD). Use ESD precautionary procedures (wear grounding wrist straps) when touching,
removing, and installing the module.

6-10 CAUTION - Before performing removal/replacement procedures, make sure the hand-held radio is powered

down and the battery is removed from the hand-held radio. Failure to do so could result in equipment damage.

6-11 CAUTION - Turn off power before removing the battery by setting the volume switch to the OFF position.

Failure to do so can result in damage to the receiver-transmitter.

6-12 CAUTION - The receiver-transmitter contains components that are susceptible to damage by static electrical

charges. Disassembly of the receiver-transmitter should only be done at a properly grounded work station.

6-12 CAUTION - Before performing removal/replacement procedures, make sure the hand-held radio is powered

down and the battery is removed. Failure to do so could result in equipment damage.

A3-4 CAUTION - Use care in removing and replacing modules to prevent damage to pins and sockets.

A3-4 CAUTION - The CCA in the frequency fill device contain parts that are sensitive to damage by electrostatic

discharge (ESD). Use ESD precautionary procedures (wear grounding wrist straps) when touching, removing,
and installing the module.

Change 1 ix\(x blank)

TO 31R2-2PRC139-1

FOREWORD

This manual meets the technical content requirements of specification MIL-M-38798B, paragraph 3.3 (1 December 1975)
and MIL-M-38807 (1 June 1982) and format requirements of specification MIL-M-38784B (16 April 1983) for the
receiver-transmitter.

a. Chapter 1 - General Information. This chapter provides general information for the receiver-transmitter including

equipment description and purpose, leading particulars, capabilities and limitations, equipment supplied,
equipment required but not supplied, optional equipment, special tools and test equipment, and related technical
manuals.

b. Chapter 2 - Installation. This chapter provides complete installation instructions for the receiver-transmitter

including installation logistics and installation procedure.

c. Chapter 3 - Preparation for Use and Reshipment. This chapter contains information which will permit operation

and maintenance personnel to prepare the equipment for use, including reference to post-installation checkout
procedures, preparing the unit for reshipment, packing, handling, and storage procedures.

d. Chapter 4 - Operation. This chapter provides complete operating instructions for the receiver-transmitter.

e. Chapter 5 - Theory of Operation. This chapter provides complete theory of operation for the receiver-transmitter.

f. Chapter 6 - Maintenance. This chapter provides all instructions required for on-equipment and off-equipment

maintenance of the receiver-transmitter. Includes preventive maintenance, troubleshooting procedures, and
repair procedures.

g. Chapter 7 - Illustrated Parts Breakdown (IPB). Provides complete illustrated parts breakdown for the receiver-

transmitter. The IPB is prepared in accordance with MIL-M-38807A.

h. Chapter 8 - Circuit Diagrams. Contains interconnection diagrams and functional block diagrams.

i. Glossary - Provides a definition of the special terms and abbreviations used in the technical order.

j. Alphabetical Index - Provides cross-references to applicable paragraphs, figures or tables.

k. Appendix A - Provides operation and maintenance instructions for the Programmer Unit, Frequency, Radio MX-

11531/U (frequency fill device).

l. Appendix B - Provides operation and maintenance instructions for the single station and multiple station battery

chargers.

m. Appendix C - Provides specific instruction on Communications Security (COMSEC) considerations for handling

and operating the radio.

Change 1

xi

TO 31R2-2PRC139-1

Legend

1. Antenna, Whip Helical, 403-470 MHz 6. Rechargeable Battery

2. Antenna, Whip Helical, 136-174 MHz 7. Receiver-Transmitter Set, Radio RT-1696/U(C)

3. Antenna, Whip Helical, 30-88 MHz 8. Lanyard

4. Carrying Bag, Camouflage 9. Antenna, 1 Meter Whip, 30-88 MHz

5. Handset, Palm

Figure 1-1. Radio Set AN/PRC-139(C)

1-0

TO 31R2-2PRC139-1

CHAPTER 1. GENERAL INFORMATION

1-1 DESCRIPTION AND PURPOSE.

1-1.1 Equipment Function and Purpose.

Radio Set AN/PRC-139(C) (hereinafter referred to as the handheld radio) provides two-way (transmit and receive)
communications in the 30-88, 136-174, or 403-470 Megahertz (MHz) frequency bands. Communication can be in either
secure or non-secure modes. This technical order (TO) describes the operation and maintenance of the frequency
modulated (FM) hand-held radio; Programmer Unit, Frequency, Radio MX-11531/U (hereinafter referred to as the
frequency fill device); the single and multiple station battery chargers; . For information on Radio Set AN/GRC-238 (base
station), Radio Set AN/TRC-199 (tactical repeater), or Adapter Group, Radio OF-228/U (vehicle adapter), reference the
applicable TO listed in paragraph 1-7.

The handheld radio is interoperable with the AN/PRC-77, AN/PRC-128, and very high frequency (VHF) FM single
channel mode of SINCGARS-V, VINSON (KY-57) compatible 16 kilobits/second (kbps) and FED-STD-1023 compatible
12 kbps receiver-transmitters. It is also interoperable with commercial 25 kHz analog (clear) FM equipment in all
frequency bands and 12.5 kHz analog (clear) FM equipment in the 136-174 and 403-470 MHz bands.

1-1.2 Equipment Description.

(See Figure 1-1.) Radio Set AN/PRC-139(C) includes a Radio Receiver-Transmitter Set RT-1696/U(C), two rechargeable
batteries, four interchangeable antennas, audio accessories, camouflage carrying bag, duty carrying bag, and lanyard.
These items are described in detail in paragraphs 1-1.2.1 through 1-1.2.6. Additional equipment available for use with
the hand-held radio is described in paragraphs 1-1.2.7 through 1-1.2.9.

1-1.2.1 Radio Receiver-Transmitter Sets RT-1696/U(C) and RT-1695/TRC-199.

(See Figure 1-2.) The Radio Receiver-Transmitter Set RT-1696/U(C) (hereinafter referred to as the receiver-transmitter)
uses modular construction for ease of maintenance. It includes three interchangeable transceiver modules and a hand-held
radio chassis. The transceiver module is enclosed within the rear cover assembly. Use of the interchangeable transceiver
modules provides the capability of operating at all frequencies within the 30-88 (tactical), 136-174 (high), or 403-470
(ultra-high frequency (UHF)) MHz frequency bands. The operating band of the receiver-transmitter is determined by the
transceiver module installed. When the transceiver modules are changed, the receiver-transmitter must be fitted with the
proper antenna. The proper configurations are listed in Table 1-1.

The receiver-transmitter operates either as a stand-alone unit or as part of a Radio Set AN/GRC-238 (base station) or
Adapter Group, Radio OF-228/U (vehicle adapter). The receiver-transmitter is used with a base station or vehicle adapter,
as applicable, to provide increased transmit power, capability of operating from either alternating current (AC) or direct
current (DC) power source, and use in a variety of vehicles.

A non-CCI receiver-transmitter, designated the RT-1695/TRC-199, is used in the tactical repeater. The tactical repeater
is used to provide additional broadcast range. Both receiver-transmitters are identical except the RT-1696/U(C) is fitted
with an INDICTOR COMSEC encryption/decryption integrated circuit.

tactical repeater.

battery connector plate on the base. The notch on the RT-1695/TRC-199 mates with a corresponding post at the back
of the sleeves in the tactical repeater. This prevents installation of the controlled cryptographic item (CCI) RT-1696/U(C)
in the tactical repeater.

1-1.2.2 Antenna Assembly.

The antenna assembly for the receiver-transmitter provides transmit and receive capability. The antenna assembly
provides transmit and receive frequency coverage in three bands of operation. As shown in Table 1-1, four antennas are
provided to cover the three bands of operation.

The RT-1695/TRC-199 and the RT-1696/U(C) receiver-transmitters have different notches on the

The RT-1696/U(C) shall not be used in the

The 1 meter antenna for the 30-88 MHz band provides greater gain than the helical whip antenna but is longer. The 30-88
MHz helical whip antenna is specifically designed for an operating range of 3 km or less; when operating at the lower end
of the frequency band, the effective range may be even further reduced.

Change 1 1-1

TO 31R2-2PRC139-1

Table 1-1. Receiver-Transmitter Configuration Vs Frequency Band

Receiver-Transmitter

Frequency Band

30-88 MHz SS-4100820-501 CAF25422, Antenna, Whip Helical

136-174 MHz

403-470 MHz

SS-4100821-501

SS-4100822-501

Transceiver Module

Antenna

SS-2100334-501, Antenna, 1 Meter

SS-1600293-1, Antenna, Whip Helical

CAF26165, Antenna, Whip Helical

Legend for Figure 1-2

1, 2, 3. Transceiver Module 4. Hand-Held Radio Chassis

Figure 1-1Figure 1-2. Radio Receiver-Transmitter Set RT-1696/U(C) or RT-1695/TRC-199

Change 11-2

TO 31R2-2PRC139-1

1-1.2.3 Audio Accessories.

The operator has the option of several handsets/headsets. Because the receiver-transmitter does not have an internal
speaker or microphone, the palm handset, or one of the optional audio accessories, must be used with the receiver­transmitter. The ear microphone is the only audio accessory that disables the alarm during transmission. Cryptographic
alarm is audible with palm handset and H-250/U during transmission. See Table 4-2 for additional information on audible
tones and alarms.

1-1.2.3.1 Palm Handset.

(See Figure 1-3.) A palm handset is the standard handset for the receiver-transmitter. It consists of a loudspeaker,
microphone, and push-to-talk (PTT) switch mounted in a compact enclosure.

Figure 1-3. Palm Handset

1-1.2.3.2 Handset H-250/U

(See Figure 1-4.) The H-250/U Handset is the recommended Government inventory handset. It is a lightweight and
rugged speaker/microphone.

Figure 1-4. Handset H-250/U

1-3

TO 31R2-2PRC139-1

1-1.2.3.3 Headset, Ear Microphone.

(See Figure 1-5.) The ear microphone is an optional audio accessory that allows the operator to discreetly monitor/send
receiver-transmitter transmissions with a small microphone/speaker that fits over the operator's ear (similar to a hearing
aid). The microphone/speaker has separate earpiece coverings that are available in different sizes to accommodate

different users. The small size of the ear microphone allows it to be worn with all types of battlefield helmets. The ear

microphone has both a belt-mounted PTT switch and a ring-mounted PTT switch. Either one must be pressed to begin
transmission. The ear microphone is the only audio accessory that disables the alarm audio and warning tones during
transmission.

NOTE

COMMUNICATIONS SECURITY

When using the ear microphone accessory, the operator should be aware that alarm audio and
warning tones will not be heard during transmission. Cryptographic alarm will be heard after
release of the PTT switch. Clear mode operation is indicated by a flashing amber LED on the
receiver-transmitter and audible beeps (in receive only).

Figure 1-5. Headset, Ear Microphone

1-1.2.4 Camouflage Carrying Bag.

The receiver-transmitter is equipped with a camouflage carrying bag for use in the field. It provides for storage of the
receiver-transmitter, a spare battery, handset, and a spare antenna. The carrying bag allows access to the receiver­transmitter controls and easy removal of the receiver-transmitter. It has a removable strap for shoulder carrying, separate
securely closable pockets for storage of spare battery (under the receiver-transmitter), a spare antenna, and a handset.

1-1.2.5 Duty Carrying Bag.

A duty carrying bag is available as an accessory. This bag provides a means to carry the receiver-transmitter. It is not
used to carry any additional items such as a spare battery or handset.

1-1.2.6 Lanyard.

The lanyard is a spiral, kevlar cord that can be attached to the operator's belt and the receiver-transmitter to prevent loss
or damage of the receiver-transmitter through dropping.

Change 11-4

TO 31R2-2PRC139-1

1-1.2.7 Programmer Unit, Frequency, Radio MX-11531/U (Frequency Fill Device).

The frequency fill device provides a means of viewing and changing the hand-held radio programmable parameters, such
as output power, channel frequencies, and squelch levels. A complete description, as well as operation and maintenance
procedures, is contained in Appendix A of this TO.

1-1.2.8 Battery Reconditioner/Analyzer.

(see Figure 1-6). A Nickel Cadmium (NiCad) battery reconditioner is available as an accessory to the hand-held radio.

The reconditioner can be used to "prime" (initially charge), "auto" (deep discharge and recharge), or fast charge up to
four NiCad batteries at once. Appendix B contains a full description of battery reconditioner operation and maintenance,
as well as information on the use and care of NiCd batteries.

1-1.2.9 Batteries and Battery Chargers.

(See Figure 1-7). The receiver-transmitter is battery powered. It is furnished with two rechargeable Nickel Cadmium

(NiCad) batteries that will provide up to 12 hours of operation each. A non-rechargeable lithium battery, which provides

up to 24 hours of operation, is available as optional equipment (refer to paragraphs 5-2.3 and 5-2.4 for additional

information). Multiple and single station battery chargers (one or the other) are available as accessories for charging the
NiCad batteries. The multiple station battery charger has the capability to charge up to six batteries simultaneously.
Appendix B contains a full description of battery charger operation and maintenance.

Both chargers monitor battery temperature. If the battery temperature is between 0° Celsius (C) (32° Fahrenheit (F)) and
50°C (122°F), the charger will charge the NiCd battery in a fast charge mode. A discharged battery can be fully charged
in fast charge mode in approximately three hours. If the battery temperature is below 0°C, the battery will be charged
in trickle mode until it reaches charging temperature, at which point it will be placed on fast charge. If the battery is above
50°C, charging will not occur until the battery temperature decreases below 50°C. Other than the slightly different LEDs,
the only difference between the multiple station battery charger and the single station battery charger is the number of
batteries that can be charged at one time.

Figure 1-6. Battery Analyzer/Reconditioner

Change 1 1-5

TO 31R2-2PRC139-1

1-6

Figure 1-7. Multiple and Single Battery Chargers

1-2 LEADING PARTICULARS.

Leading particulars for the receiver-transmitter are given in Table 1-2.

Table 1-2. Leading Particulars

Characteristic Parameter

Equipment dimensions and weight:

TO 31R2-2PRC139-1

Length
Width
Height
Volume
Weight

Environmental requirements:

Temperature:

Operating
Storage

Immersion Proof

Electrical power requirements 10 Volts (V) direct current (DC) Rechargeable NiCad or Non-

9.1 inches (in.) (23.11 centimeters (cm))

3.0 in. (7.62 cm)

1.8 in. (4.57 cm)

49.14 cubic in. (804.77 cubic cm)

3.3 lbs. (1.5 kilograms (kg))

-30°C (-22°F) to +49°C (120°F)

-51°C (-60°F) to +68°C (155°F)
Immersion proof to a depth of two (2) meters in fresh water.

Rechargeable Lithium Battery

1-3 CAPABILITIES AND LIMITATIONS.

Capabilities and limitations of the receiver-transmitter are given in Table 1-3.

Table 1-3. Capabilities and Limitations

Characteristic Parameter

Frequency Range:

30-88 MHz
136-174 MHz
403-470 MHz

Transmitter Output 0.5 and 2 watts programmable

Security TEMPEST compliant INDICTOR chip

25.0 kilohertz (kHz) bandwidth

12.5 kHz and 25.0 kHz bandwidth

12.5 kHz and 25.0 kHz bandwidth

1-7

TO 31R2-2PRC139-1

Characteristic Parameter

Channels (receive and transmit frequencies) 14 programmable channels

Adjacent Channel Selectivity 50 dB over 30-88 MHz, 25 kHz Bandwidth

52 dB over 136-174 MHz, 12.5 kHz Bandwidth
60 dB over 136-174 MHz, 25 kHz Bandwidth
40 dB over 403-470 MHz, 12.5 kHz Bandwidth
48 dB over 403-470 MHz, 25 kHz Bandwidth

Sensitivity -116 dBm or 0.35mV for 12 decibels (dB) ratio of signal +

noise +distortion/noise + distortion (SINAD)

Spurious Response and Image Rejection 65 dB over all three bands

Intermodulation Spurious Response Attenuation 60 dB over 30-88 MHz

60 dB over 136-174 MHz
60 dB over 403-470 MHz
25 kHz bandwidth

Channelization 25 kHz bandwidth channel spacing on all frequency bands

12.5 kHz bandwidth channel spacing on 136-174 MHz (clear
mode only)

12.5 kHz channel spacing on 403-470 MHz bands (clear mode
only)

12.5 kHz tuning steps

1-4 EQUIPMENT SUPPLIED.

Equipment supplied with Radio Set AN/PRC-139(C) is listed in Table 1-4.

Change 11-8

TO 31R2-2PRC139-1

Table 1-4. Equipment Supplied

Official Nomenclature or Common Name Part Number Quantity

Receiver-Transmitter Set, Radio RT-1696/U(C), including:

30-88 MHz Transceiver module
136-174 MHz Transceiver module
403-470 MHz Transceiver module

Antenna, Whip Helical, 30-88 MHz CAF25422 1

Antenna, 1 Meter Whip, 30-88 MHz SS-2100334-501 1

Antenna, Whip Helical, 136-174 MHz SS-1600293-1 1

Antenna, Whip Helical, 403-470 MHz CAF26165 1

Lanyard SS-1600240-1 1

Handset, Palm SS-1600289-1 1

Carrying Bag, Camouflage SS-1600245-1 1

NiCad Battery SS-1600350-1 2

SS-4100807-502
SS-4100820-501
SS-4100821-501
SS-4100822-501

1
1
1
1

1-5 OTHER EQUIPMENT.

Table 1-5 lists accessories that are used with the hand-held radio but not supplied. Table 1-6 lists optional equipment that
may be used with the hand-held radio, but that are not required for normal operation. This equipment must be ordered
separately from the Radio Set AN/PRC-139(C).

Table 1-5. Equipment Required But Not Supplied

Description Part Number

Battery Charger, Single Station, or SS-4100846-501

Battery Charger, Multiple Station SS-4100885-501

Programmer Unit, Frequency, Radio NX-11531/U

COMSEC Fill Cable SS-3500280-501

Frequency Fill Device Cable SS-4100797-501

Table 1-6. Optional Equipment

Description Part Number

Cloning Cable SS-3500272-501

Duty bag SS-5005AN (K8916) *

Battery, Non-Rechargeable, Lithium SS-1600351-1

Handset H-250/U

Headset, Ear Microphone ERS-601R-RACAL (05H60) *

Battery Reconditioner R2000

NOTE

Part not listed in IPB; CAGE code not provided elsewhere in TO.

•

Change 1 1-9

TO 31R2-2PRC139-1

1-6 SPECIAL TOOLS AND TEST EQUIPMENT.

There are no special tools or test equipment required for organizational level maintenance of the Radio Set
AN/PRC139(C).

1-7 RELATED TECHNICAL MANUALS.

Table 1-7 lists related technical manuals.

Table 1-7. Related Technical Manuals

Publication Number Publication Title

31R2-2TRC199-1 Operation and Maintenance Instructions with Illustrated Parts

Breakdown (Organizational Level) for Radio Set AN/TRC-199

31R2-2GRC238-1 Operation and Maintenance Instructions with Illustrated Parts

Breakdown (Organizational Level) for Radio Set AN/GRC-238

31R2-4-1085-1 Operation and Maintenance Instructions with Illustrated Parts

Breakdown (Organizational Level) for Adapter Group, Radio
OF-228/U

31R2-2PRC139-06 Work Unit Code Manual

KAM-330 Operating Instructions for KOI-18 and KYK-13 COMSEC Fill

Devices

ON477340 AN/CYZ-10 Data Transfer Device Users' Manual

1-10

TO 31R2-2PRC139-1

CHAPTER 2. INSTALLATION

2-1 INTRODUCTION.

This section is divided into two sections. Section I, Installation Logistics, provides information for site preparation,
unloading, unpacking and inspections, housing, receiving data, material handling, cabling, and buildings and other
structures. Section II, Installation Procedures, lists tools and equipment required for field installation and describes the
installation sequence.

Section I. INSTALLATION LOGISTICS

NOTE

CONTROLLED CRYPTOGRAPHIC ITEM

The receiver-transmitter part of the hand-held radio is a controlled cryptographic item (CCI).
Consult your COMSEC manager for security procedures applicable to the control, use, and
storage of this hand-held radio.

2-2 SITE PREPARATION.

Not Applicable.

2-3 UNPACKING AND INSPECTION.

CAUTION

Exercise care when removing from packing material in order to prevent damage to the unit.

To unpack the hand-held radio, remove the unit and any equipment from the carton and store the packing and carton for
reuse/shipment. Packing instructions are given in Chapter 3. Inspect contents for completeness, integrity, and damage.
Contents shall be in accordance with the packing slip and the list of supplied equipment in Table 1-4.

Refer to Figure 2-1 as a guide in the performance of the following unpacking and inspection procedures:

a. Open top of the fiberboard box (7, Figure 2-1) and remove the operating instructions (1) and

polystyrene top (2) from container.

b. Remove barrier bag (5) from the box.

c. Remove packing slip (8) from the plastic envelope on the fiberboard box and check to ensure that all

items listed on the packing slip were received. Each component of the hand-held radio is placed in an
individual cutout in the package foam insert to allow ready verification of system completeness.

d. Store all packing materials (except desiccant) in the fiberboard box and store fiberboard box for re-use.

Discard the original desiccant. New desiccant material should always be used for re-packing.

e. Inspect top and bottom, both sides, and front and rear panels of equipment for dents, scratches or any

visually identifiable structural damage.

2-1

TO 31R2-2PRC139-1

2-2

Legend for Figure 2-1:

1. Operating instructions 5. Barrier bag

2. Polystyrene top 6. Polystyrene bottom

3. Receiver-transmitter 7. Fiberboard box

4. Desiccant bag 8. Packing slip

Figure 2-1. Packaging Diagram for the Radio (Typical)

f. Inspect controls and indicators on top panel for missing, broken or cracked knobs or levers. Note any

discrepancies on DD 1348-1.

2-4 HOUSING.

If necessary to store the hand-held radio, proceed as follows:

NOTE

COMMUNICATIONS SECURITY

Ensure that the receiver-transmitter is zeroized (operating mode switch (5, Figure 4-1) turned to
Z position) before placing the receiver-transmitter in storage. This will ensure that the keys
installed in the receiver-transmitter are not compromised.

a. Clean the hand-held radio before placing in storage (see paragraph 6-3.3.2).

b. Remove batteries from the receiver-transmitter.

NOTE

The temperature of the storage area must be within the range -51°C (-60°F) to +68°C (+155°F).

2-5 RECEIVING DATA.

TO 31R2-2PRC139-1

Table 2-1 identifies the contents and particulars of the shipping container.

Table 2-1. Items Required to Complete Installation

Dimensions (In.)

Qty Item

1 Radio Set AN/PRC-139(C) 23.5 13.5 23.5 22

WHD

2-6 MATERIAL HANDLING.

No material handling equipment is required in the installation of the hand-held radio.

2-7 BUILDINGS AND OTHER SUPPORTING STRUCTURES.

Not applicable.

Weight (lb.)

Change 1 2-3

TO 31R2-2PRC139-1

Section II. INSTALLATION PROCEDURES

2-8 TOOLS AND EQUIPMENT REQUIRED FOR FIELD INSTALLATION.

No tools or equipment are required for field installation of the hand-held radio.

2-9 INSTALLATION SEQUENCE.

Install the hand-held radio as follows:

NOTE

Prior to installing the battery on the receiver-transmitter, ensure that the power/volume switch (3,
Figure 4-1) is in the OFF position for optimum service life. New NiCad batteries should be
prepared for initial use in accordance with Appendix B.

a. Connect the fully charged battery to the hand-held radio. (See Figure 2-2.)

b. Connect an audio accessory, such as the supplied palm handset, to the audio accessory connector (2,

Figure 4-3) on top of receiver-transmitter. Due to the tightness of the O-ring seal in the audio
connector, it is recommended that the user first apply a non-conducting silicon lubricant, such as Dow­Corning 738 to the O-ring before connecting it to the receiver-transmitter.

NOTE

The operating band of the hand-held radio is determined by the transceiver module installed.
When the transceiver module is first installed or changed, the receiver-transmitter must be fitted
with the proper antenna as identified below:

Transceiver Module Antenna

30-88 MHz (SS-4100820-501) 30-88 MHz (CAF25422 or SS-2100334-501)
136-174 MHz (SS-4100821-501) 136-174 MHz (SS-1600293-1)
403-470 MHz (SS-4100822-501) 403-470 MHz (CAF26165)

c. Connect the proper antenna to the receiver-transmitter by aligning the antenna connector (3, Figure 4-3)

on top of receiver-transmitter. Turn antenna clockwise to thread it into position.

2-4

TO 31R2-2PRC139-1

Figure 2-2. Receiver-Transmitter Battery and Antenna Installation

2-5/(2-6 blank)