Racal Instruments AN/TRC-199 Manual

TO 31R2-2TRC199-1
OPERATION AND MAINTENANCE INSTRUCTIONS
WITH ILLUSTRATED PARTS BREAKDOWN
ORGANIZATIONAL LEVEL
RADIO SET
AN/TRC-199
(TACTICAL REPEATER)
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 1 - 10 AUGUST 1994

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TABLE OF CONTENTS
Chapter Page
LIST OF ILLUSTRATIONS .........................................................................................................................iv
LIST OF TABLES .........................................................................................................................................iv
SAFETY SUMMARY ....................................................................................................................................v
FOREWORD .................................................................................................................................................ix
CHAPTER 1.0 GENERAL INFORMATION....................................................................................................... 1-3
1-1 DESCRIPTION AND PURPOSE. ....................................................................................................1-3
1-1.1 Equipment Function and Purpose. ...................................................................................1-3
1-1.2 Equipment Description. ...................................................................................................1-3
1-2 LEADING PARTICULARS. ............................................................................................................1-5
1-3 CAPABILITIES AND LIMITATIONS. ...........................................................................................1-6
1-4 EQUIPMENT SUPPLIED. ...............................................................................................................1-7
1-4.1 EQUIPMENT REQUIRED BUT NOT SUPPLIED. ......................................................1-8
1-5 SPECIAL TOOLS AND TEST EQUIPMENT. ................................................................................1-8
1-6 RELATED TECHNICAL MANUALS. ............................................................................................1-8
CHAPTER 2.0 INSTALLATION .......................................................................................................................... 2-1
2-1 INTRODUCTION. ............................................................................................................................2-1
Section I. INSTALLATION LOGISTICS ..................................................................................................2-1
2-2 SITE PREPARATION. .....................................................................................................................2-1
2-3 UNPACKING AND INSPECTIONS................................................................................................2-1
2-4 HOUSING. ........................................................................................................................................2-3
2-5 RECEIVING DATA..........................................................................................................................2-3
2-6 MATERIAL HANDLING.................................................................................................................2-3
2-7 CABLES............................................................................................................................................2-4
2-8 BUILDING AND OTHER SUPPORTING STRUCTURES. ...........................................................2-4
Section II. INSTALLATION PROCEDURES............................................................................................2-5
2-9 SPECIAL TOOLS AND EQUIPMENT REQUIRED FOR FIELD INSTALLATION. ...................2-5
2-10 INSTALLATION SEQUENCE.........................................................................................................2-5
2-10.1 Antenna/Mast Installation. ...............................................................................................2-5
2-10.2 Lithium Battery Installation. ............................................................................................2-9
2-10.3 Ground Rod Installation...................................................................................................2-9
2-10.4 External Power Supply. ...................................................................................................2-9
2-10.5 Diplexer Installation. .......................................................................................................2-9
2-10.6 Receiver-Transmitter Transceiver Module Installation....................................................2-9
CHAPTER 3.0 PREPARATION FOR USE AND RESHIPMENT .................................................................. 3-10
3-1 INTRODUCTION. ..........................................................................................................................3-10
Section I. PREPARATION FOR USE ......................................................................................................3-10
3-2 INSPECTION..................................................................................................................................3-10
3-3 POST-INSTALLATION CHECKOUT...........................................................................................3-10
3-3.1 Preliminary.....................................................................................................................3-10
3-3.2 Alignment and Adjustment. .............................................................................................3-2
3-3.3 Post-Installation Checkout Procedures. ...........................................................................3-2
Section II. PREPARATION FOR RESHIPMENT .....................................................................................3-2
3-4 PREPARING UNIT FOR RESHIPMENT........................................................................................3-2
3-5 PACKING. ........................................................................................................................................3-2
3-6 HANDLING AND STORAGE. ........................................................................................................3-2
3-6.1 Protective Measures for Electrical Connectors................................................................3-3
3-6.2 Preparation for Shipment and Storage. ............................................................................3-3
3-6.3 Handling. .........................................................................................................................3-3

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CHAPTER 4.0 OPERATION ................................................................................................................................. 4-1
4-1 INTRODUCTION. ........................................................................................................................... 4-1
4-2 CONTROLS AND INDICATORS. .................................................................................................. 4-1
4-2.1 Indicators, Controls and Switches. .................................................................................. 4-1
4-2.2 Power Supply Switches and Connectors. ........................................................................ 4-1
4-2.3 Connectors....................................................................................................................... 4-1
4-2.4 Diplexer Controls. ........................................................................................................... 4-1
Section II. OPERATING INSTRUCTIONS .............................................................................................. 4-7
4-3 INITIAL POWER-UP AND DIPLEXER TUNING PROCEDURES.............................................. 4-7
4-4 RECEIVING AND RETRANSMITTING MESSAGE. ................................................................... 4-8
4-5 COVERT OPERATIONS................................................................................................................. 4-8
4-6 RECEIVER-TRANSMITTERS........................................................................................................ 4-8
4-7 EQUIPMENT SHUTDOWN............................................................................................................ 4-8
Section III. EMERGENCY OPERATION ................................................................................................. 4-8
4-8 EMERGENCY POWER................................................................................................................... 4-8
4-9 ELECTROMAGNETIC PULSE PROTECTION............................................................................. 4-9
4-9.1 EMP Susceptibility.......................................................................................................... 4-9
4-9.2 EMP Protective Measures............................................................................................... 4-9
4-10 NUCLEAR, BIOLOGICAL, AND CHEMICAL(NBC) CONTAMINATION ................................ 4-9
CHAPTER 5.0 THEORY OF OPERATION ........................................................................................................ 5-1
Section I. FUNCTIONAL SYSTEM(S) OPERATION.............................................................................. 5-1
5-1 GENERAL. ....................................................................................................................................... 5-1
5-2 FUNCTIONAL SYSTEM(S) OPERATION. ................................................................................... 5-1
5-2.1 +15V DC-DC Converter Circuit Card Assembly (CCA) (A1). ....................................... 5-1
5-2.2 Repeater Control Circuit Card Assembly (CCA) (A3).................................................... 5-1
5-2.3 Parent Board Circuit Card Assembly (CCA) (A4). ......................................................... 5-1
5-2.4 Control Panel (A5). ......................................................................................................... 5-1
5-2.5 RF Power Amplifier Assembly (A6). .............................................................................. 5-1
5-2.6 +28V DC-DC Converter Circuit Card Assembly (CCA) (A7). ....................................... 5-3
5-2.7 Receiver-Transmitter....................................................................................................... 5-3
5-2.8 Antenna System............................................................................................................... 5-3
5-2.9 Diplexer........................................................................................................................... 5-3
5-2.10 AC/DC Power Supply (A2)............................................................................................. 5-3
Section II. FUNCTIONAL OPERATION OF ELECTRONIC CIRCUITS ............................................... 5-4
5-3 REPEATER CONTROL CIRCUIT CARD ASSEMBLY (CCA) (A3)............................................ 5-4
5-4 15 WATT POWER AMPLIFIER ASSEMBLY (A6)....................................................................... 5-4
Section III. FUNCTIONAL OPERATION OF MECHANICAL ASSEMBLIES ...................................... 5-4
CHAPTER 6.0 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 Display Off Control......................................................................................................... 6-1
6-2.3 Receive Tune Mode Verification. ................................................................................... 6-2
6-2.4 Transmit Tune Mode Verification................................................................................... 6-2
6-2.5 Fault LED........................................................................................................................ 6-3
6-3 SERVICING. .................................................................................................................................... 6-3
6-3.1 Servicing Intervals........................................................................................................... 6-3
6-3.2 Inspection. ....................................................................................................................... 6-3
6-3.3 Preventive Maintenance. ................................................................................................. 6-3
6-4 TROUBLESHOOTING.................................................................................................................... 6-4
6-5 REMOVAL/REPLACEMENT PROCEDURES. ........................................................................... 6-10
6-5.1 Removal/Replacement Procedures - Operator............................................................... 6-10
6-5.2 Removal/Replacement Procedures - Repair Specialist.................................................. 6-12

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iii
CHAPTER 7.0 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 LISTS ...........................................................................................7-10
Section III. NUMERICAL INDEX ...........................................................................................................7-21
Section IV. REFERENCE DESIGNATION INDEX................................................................................7-23
Section V. COMMON BULK ITEMS LIST.............................................................................................7-24
CHAPTER 8.0.......................................................................................................................................................... 8-1
8-1 SCOPE...............................................................................................................................................8-1
GLOSSARY
ALPHABETICAL INDEX

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LIST OF ILLUSTRATIONS
Figure 1-1. Radio Set AN/TRC-199......................................................................................................................... 1-0
Figure 1-2. Receiver-Transmitter RT-1695/TRC-199.............................................................................................. 1-4
Figure 1-3. Diplexer Front Panel (30-88 MHz)........................................................................................................ 1-4
Figure 2-1. Packaging Diagram for the Tactical Repeater ....................................................................................... 2-2
Figure 2-2. Antenna Mast/Antenna Installation (Sheet 1 of 6) ................................................................................ 2-5
Figure 2-3. Antenna Mast/Antenna Installation (Sheet 2 of 6) ................................................................................ 2-6
Figure 2-4. Antenna Mast/Antenna Installation (Sheet 3 of 6) ................................................................................ 2-6
Figure 2-5. Antenna Mast/Antenna Installation (Sheet 4 of 6) ................................................................................ 2-7
Figure 2-6. Antenna Mast/Antenna Installation (Sheet 5 of 6) ................................................................................ 2-7
Figure 2-7. Antenna Mast/Antenna Installation (Sheet 6 of 6) ................................................................................ 2-8
Figure 4-1. Location of Tactical Repeater Indicators, Controls and Switches ......................................................... 4-1
Figure 4-2. Location of Power Supply Switches (Power Supply Top View) ........................................................... 4-3
Figure 4-3. Location of Power Supply Connectors (Power Supply Side View) ...................................................... 4-4
Figure 4-4. Location of Tactical Repeater Unit Connectors..................................................................................... 4-5
Figure 4-5. Location of Tactical Repeater Diplexer Controls .................................................................................. 4-6
Figure 5-1. Tactical Repeater System, Functional Block Diagram .......................................................................... 5-2
Figure 5-2. Repeater Control CCA (A3), Functional Block Diagram ...................................................................... 5-5
Figure 5-3. 15 Watt Power Amplifier Assembly (A6), Functional Block Diagram ................................................. 5-6
Figure 7-1. Radio Set AN/TRC-199 (Sheet 1 of 2)................................................................................................... 7-8
Figure 7-2. Tactical Repeater Assembly (SS-4100806-501)................................................................................. 7-13
Figure 7-3. Power Amp Assembly, 15W (SS-4100853-501)................................................................................... 7-19
FO-1 Radio Set AN/TRC-199, Interconnection Diagram ............................................................................. FP-1
LIST OF TABLES
Table 1-1. Tactical Repeater Configurations (by Frequency Band)........................................................................ 1-3
Table 1-2. Leading Particulars ................................................................................................................................1-5
Table 1-3. Capabilities and Limitations .................................................................................................................. 1-6
Table 1-4. Equipment Supplied............................................................................................................................... 1-7
Table 1-5. Equipment Required But Not Supplied ................................................................................................. 1-8
Table 1-6. Related Technical Manuals.................................................................................................................... 1-8
Table 2-1. Tactical Repeater Packaging.................................................................................................................. 2-3
Table 2-2. Tactical Repeater Interconnecting Cables.............................................................................................. 2-4
Table 2-3. External Power Supply Switch Settings................................................................................................. 2-9
Table 4-1. Description of Indicators, Controls and Switches.................................................................................. 4-2
Table 4-2. Description of Power Supply Switches.................................................................................................. 4-3
Table 4-3. Description of Power Supply Connectors.............................................................................................. 4-4
Table 4-4. Description of Repeater Unit Connectors .............................................................................................. 4-5
Table 4-5. Description of Diplexer Controls........................................................................................................... 4-6
Table 5-1. Antenna System Frequency Band Vs Gain ............................................................................................ 5-3
Table 6-1. Initial Switch and Control Settings for Power-Up Verification ............................................................. 6-1
Table 6-2. Initial Switch and Control Settings for Receive Tune Mode Verification ............................................. 6-2
Table 6-3. Initial Switch and Control Settings for Transmit Tune Mode Verification............................................ 6-2
Table 6-4. Recommended Service Intervals............................................................................................................ 6-3
Table 6-5. Organizational Maintenance Guide - Operator...................................................................................... 6-5
Table 6-6. Organizational Maintenance Guide - Repair Specialist ......................................................................... 6-9
Table 6-7. Cross-Reference to Removal/Replacement Procedures ....................................................................... 6-10
Table 7-1. Radio Set AN/TRC-199....................................................................................................................... 7-10
Table 7-2. Tactical Repeater Assembly (SS-4100806-501).................................................................................. 7-15
Table 7-3. Power AMP Assembly, 15W (SS-4100853-501) ................................................................................ 7-20

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v
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.
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
voltages 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.
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.
Lithium oxide batteries or cells may be used in the receiver-transmitter 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.
Do not short circuit, recharge, or bypass internal fuse.
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.
WARNING
WARNING
LITHIUM BATTERIES

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Change 1vi
VOLTAGES WITHIN THIS EQUIPMENT ARE HIGH ENOUGH TO ENDANGER LIFE.
Covers are not to be removed except by persons qualified and authorized to do so and these
persons should always take extreme care once the covers have been removed.
Page
2-1 WARNING - Installation of the tactical repeater requires a minimum of two people.
2-1 WARNING - Removing the tactical repeater assembly from the shipping carton requires a minimum of two
persons.
2-5 WARNING - Ensure proper use of safety tools (work gloves and hard hat) during assembly and disassembly of
antenna.
2-6 WARNING - Before using the hammer, ensure a wedge is placed in the top of the hammer so that the hammer
head does not come loose, thereby endangering personnel.
3-3 WARNING - Before performing removal/replacement procedures, make sure power is removed from unit.
Failure to do so could result in personal injury or equipment damage.
6-10 WARNING - Before performing removal/replacement procedures, make sure power is removed from the unit
by disconnecting from power source. Failure to do so could result in personal injury and equipment damage.
6-11 WARNING - This equipment is capable of generating RF power sufficient to cause RF burns. During transmit,
care should be taken to eliminate the possibility of touching exposed RF output points such as the center
conductors of coaxial cables or antenna feedpoints.
6-12 WARNING - Before performing removal/replacement procedures, make sure power is removed from the unit.
Failure to do so could result in personal injury or equipment damage.
2-1 CAUTION - Exercise care when removing units from packing material in order to prevent damage to the unit.
3-3 CAUTION - Never apply pressure sensitive tape directly to connectors. This could damage connector pins.
3-3 CAUTION - Package all electrostatic discharge (ESD) sensitive assemblies in ESD bags before shipping or
storing.
3-3 CAUTION - Rough handling may cause unnecessary damage to electronic assemblies.
3-3 CAUTION - Electronic assemblies containing solid-state devices are susceptible to damage from static electrical
discharges. Wear protective clothing and grounded wrist straps.
3-3 CAUTION - Forcing any tilted or cocked electronic assembly into position may result in bent or broken pins.
3-4 CAUTION - When repairing an electronic assembly, be careful that the tool employed does not inadvertently
press against leads, pins, or other parts that are easily bent.
WARNING

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Page
3-4 CAUTION - Because of the miniaturization of parts for electronic assembly construction, the leads, connectors,
and pins have been stiffened to make them more rugged. As a result, such parts are brittle and will break easily
if bent too often or pulled on too hard. 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.
3-4 CAUTION - The tactical repeater contains components that are susceptible to damage by static electrical
charges. Disassembly of the tactical repeater should only be done at a properly grounded work station.
6-12 CAUTION - The tactical repeater contains components that are susceptible to damage by static electrical
charges. Disassembly of the tactical repeater should only be done at a properly grounded work station.

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ix
FOREWORD
This manual meets the technical content requirements of specification MIL-M-38798B, paragraph 3.3 (1 December 1975)
and MIL-M-38807A (1 June 1982) and format requirements of specification MIL-M-38784B (16 April 1983) for the
tactical repeater.
a. Chapter 1 - General Information. This chapter provides general information for the tactical repeater
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 tactical repeater.
e. Chapter 5 - Theory of Operation. This chapter provides complete theory of operation for the tactical
repeater.
f. Chapter 6 - Maintenance. This chapter provides all instructions required for on-equipment and off-
equipment maintenance of the tactical repeater. Includes preventive maintenance, troubleshooting
procedures, and repair procedures.
g. Chapter 7 - Illustrated Parts Breakdown (IPB). Provides complete illustrated parts breakdown for the
tactical repeater. The IPB is prepared in accordance with MIL-M-38807A.
h. Chapter 8 - Circuit Diagrams. Contains interconnection diagram.
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.

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1-0
Legend for Figure 1-1:
1. Receiver-Transmitter RT-1695/TRC-199 Unit (A4, A5)
2. Tactical Repeater (TR) Assembly (A1)
3. Weldment, Repeater Frame
4. Power Supply (A2) (includes Power Supply Enclosure and Battery Enclosure)
5. Cable Assembly, TR PS Power (W1)
6. Diplexer Assembly, 30-88 MHz (A3)
7. Diplexer Assembly, 136-174 MHz (A3)
8. Diplexer Assembly, 403-470 MHz (A3)
9. Not Used
10. Antenna, 30-88 MHz
11. Antenna, 136-174 MHz
12. Antenna, 403-470 MHz
13. Antenna, Mast, TR
14. Case, Transceiver Module
15. Strap Assembly, Ground (W5)
16. Strap Assembly, Ground (W6)
17. Strap Assembly, Ground (W7)
18. Rod Assembly, Ground
19. Cable, Coaxial, Antenna (W10)
20. Cable Assembly, TR, 120 VAC, Power (W9)
21. Cable Assembly, TR, 240 VAC, Power (W9)
22. Cable Assembly, TR, 10-32 VDC, Power (W9)
23. Case, Transit, Diplexer
24. Case, Transit, Diplexer
25. Cover, Frame
26. Cable Assembly, Coaxial, RF (W2)
27. Cable Assembly, Coaxial, RF (W3)
28. Cable Assembly, Coaxial, RF (W4)
Figure 1-1. Radio Set AN/TRC-199
(Sheet 1 of 3)

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1-1
Figure 1-1. Radio Set AN/TRC-199
(Sheet 2 of 3)

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Figure 1-1. Radio Set AN/TRC-199
(Sheet 3 of 3)

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CHAPTER 1.0 GENERAL INFORMATION
1-1 DESCRIPTION AND PURPOSE.
1-1.1 Equipment Function and Purpose.
Radio Set AN/TRC-199 (hereinafter referred to as the tactical repeater) is a communications unit capable of operating
in the 30-88, 136-174, or 403-470 Megahertz (MHz) frequency bands. It is used to extend the communications range of
fixed, mobile, or portable receiver-transmitters. The tactical repeater is COMSEC transparent and provides repeater
capability for all modes without the need for COMSEC encryption/decryption.
1-1.2 Equipment Description.
(See Figure 1-1.) The tactical repeater includes a tactical repeater assembly, two non-CCI Receiver-Transmitter Sets,
Radio RT-1695/TRC-199 (hereinafter referred to as the receiver-transmitters), three antenna systems, an antenna mast,
three diplexers, a tubular (weldment) frame, a power supply enclosure, and a battery enclosure.
1-1.2.1 Tactical Repeater Assembly.
(See Figure 7-2.) The tactical repeater assembly includes two circuit card assemblies (CCAs) which are accessible
through a removable cover on the underside of the unit. These are the +15 volt (V) DC-DC converter CCA (A1) and
repeater control CCA (A3). These CCAs plug into the parent board (A4) which interfaces with control panel assembly
(A5), power amplifier assembly (A6), +28V DC-DC converter CCA (A7), the external power supply, and the plug-in
receiver-transmitters. The receiver-transmitters plug into sleeves (A8, A9) located on the left and right sides of the front
panel of the tactical repeater assembly. The power amplifier (A6) mounts on a heatsink on top of the tactical repeater unit.
1-1.2.2 Receiver-Transmitters.
(See Figure 1-2.) The receiver-transmitters provide transmit/receive communication in the 30-88, 136-174, or 403-470
MHz frequency bands. The operating band of the receiver-transmitters is determined by the transceiver module installed.
When the transceiver modules are changed, the tactical repeater must be fitted with the proper antenna and diplexer. The
proper configurations are listed in Table 1-1.
Table 1-1. Tactical Repeater Configurations (by Frequency Band)
Frequency Band Receiver-Transmitter Antenna Diplexer
30-88 MHz SS-4100820-501 4242-MK2-RAC SS-1600322-501
136-174 MHz SS-4100821-501 4265-RAC SS-1600322-502
403-470 MHz SS-4100822-501 4266-RAC SS-1600322-503
NOTE
The CCI Receiver-Transmitter RT-1696/U(C) shall not be used in the tactical repeater.
1-1.2.3 Antenna Assembly.
The antenna system for the tactical repeater provides full-duplex transmit and receive capability over one of three bands
of operation. The selected antenna is mast mounted. Three antennas are provided to cover the three bands of operation.
Refer to Table 1-1. A mast is provided to elevate the selected antenna up to 10 feet (in 5 foot increments) to increase
transmission range and quality of transmitted and recorded signals.

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1-4
Figure 1-1Figure 1-2. Receiver-Transmitter RT-1695/TRC-199
1-1.2.4 Diplexer.
(See Figure 1-3.) The tactical repeater diplexer provides a method of using a receiver and a transmitter on a common
antenna. The diplexer, when properly tuned, provides a transmitter-to-receiver isolation of 70 decibels (dB) at any
frequency spacing of 4 MHz or 3% of the operating frequency, whichever is greater. The diplexer has an insertion loss
of less than 2.25 dB between the transmit port and the antenna and less than 3.0 dB between the receive port and the
antenna. The diplexer is capable of handling 60 watts of radio frequency (RF) power in the transmit path and provides
protection at the receive port to limit receive signals to a maximum level of +33 power in decibels (referenced to 1
milliwatt) (dBm). There are three separate diplexers, one for each frequency band. The frequency band of the diplexer
must correspond to that of the receiver-transmitter and antenna.
Legend for Figure 1-3 (136-174 MHz and 403-470 MHz diplexers have the same controls, but their appearance is slightly
different):
1Tuning Meter 2. SENS Control 3. RCV Control 4. XMT Control 5. TUNE Switch
Figure 1-3. Diplexer Front Panel (30-88 MHz)

TO 31R2-2TRC199-1
1-5
1-1.2.5 Power Supply Assembly.
The power supply assembly provides power for the operation of the tactical repeater. The power supply will operate from
any direct current (DC) voltage between 10 and 32 volts and from 120/240 or 220 volts alternating current (VAC). The
operation of the power supply is controlled by AC/OFF/DC and internal/external (INT/EXT) DC switches on the power
supply. The power supply assembly consists of the power supply enclosure and the battery enclosure.
1-1.2.5.1 Power Supply Enclosure.
The power supply enclosure provides regulated DC power to the tactical repeater assembly.
1-1.2.5.2 Battery Enclosure.
The battery enclosure is a weather-resistant container that can hold either four Lithium batteries (Type BA-5590/U) or
four NiCad batteries (Type BB-590/U). The battery connectors are mounted in the bottom of the battery enclosure box.
(For battery installation see paragraph 2-10.2.)
1-2 LEADING PARTICULARS.
Leading particulars for the tactical repeater are given in Table 1-2.
Table 1-2. Leading Particulars
Characteristic Parameter
Equipment dimensions and weight:
Length
Width
Height
Volume
Weight
Environmental requirements:
Temperature:
Operating
Storage
Humidity
Electrical power requirements
28.00 inches (in.) (71.1 centimeters (cm))
18.50 in. (47.0 cm)
18.50 in. (47.0 cm)
9,583 cubic in. (157,037 cubic cm)
130.0 pounds (lbs) (58.97 kilograms (kg))
-40°Celsius (C) (-40°Fahrenheit (F)) to +49°C (120°F)
-51°C (-60°F) to +68°C (155°F)
0 to 95 percent relative humidity
10V to 32V DC Battery Power
120/240 "10% (1 phase, 3 wire) at 50/60 Hertz (Hz)
220 VAC "10% (1 phase, 3 wire) at 50 Hz

TO 31R2-2TRC199-1
Change 1
1-6
1-3 CAPABILITIES AND LIMITATIONS.
Capabilities and limitations of the tactical repeater are given in Table 1-3.
Table 1-3. Capabilities and Limitations
Characteristic Parameter
Frequency Range (RCV and XMT) 30-88 MHz
136-174 MHz
403-470 MHz
Transmitter Output 2 and 10 watts selectable
Security Tactical repeater is COMSEC transparent
Interoperability AN/PRC-77 Manpack Radio
Radio Set AN/PRC-128
SINCGARS-V (single channel)
FED-STD-1023 compatible, 12 kbps
VINSON (KY-57) compatible, 16 kbps
Analog 25 MHz frequency modulated (FM) radios
Receiving/Transmitting 25 kilohertz (kHz) Bandwidth on all frequency bands.
12.5 kHz intermediate frequency (IF) Bandwidth on 136-174
MHz and 12.5 kHz channel spacing on 403-470 MHz bands
12.5 kHz tuning steps
Channels (receive and transmit) 14 channels each programmable with frequency bandwidth,
output power, and squelch tones (continuous-tone controlled
squelch system (CTCSS)) as variables
Adjacent Channel Selectivity 50 dB over 30-88 MHz, 25.0 kHz bandwidth
52 dB over 136-174 MHz, 12.5 kHz bandwidth
60 dB over 136-174 MHz, 25.0 kHz bandwidth
40 dB over 403-470 MHz, 12.5 kHz bandwidth
48 dB over 403-470 MHz, 25.0 kHz bandwidth
Sensitivity -113 dBm or 0.50
µ
V for 12 dB signal + noise + distortion/noise
+ distortion (SINAD)
Spurious Response and Image Rejection 65 dB over all bands
Intermodulation Spurious Response 60 dB over 30-88 MHz
60 dB over 136-174 MHz
60 dB over 403-470 MHz