*FM 24-19

Field Manual No 24-19

Headquarters Department of the Army Washington, DC, 24 May 1991

FM 24-19

Radio Operator's Handbook

Table of Contents

---

Preface

Chapter 1 - Radio and Radio Teletypewriter Sets

Section I - Radio Set AN/GRC-106

Installation Procedures

Prestart Procedures

Starting Procedures

Tuning Procedures

Stopping Procedures

Section II - Radio Teletypewriter Set AN/VSC-2

Installation Procedures

Prestart Procedures

Starting Procedures

Tuning Procedures

Stopping Procedures

Simplified Installation Procedures Using TSEC/KW-7

Simplified Installation Procedures Using TSEC/KG-84A

Section III - Radio Teletypewriter Set AN/VSC-3

Operating Instructions

Prestart Operating Procedures

Starting Procedures

Radio Set AN/GRC-106(*) Starting and Tuning Procedures

Intercommunications Set AN/VIC-1(V) Starting Procedures

Intercommunications Set AN/VIC-1(V) Local Operation

Stopping Procedures

Radio Teletypewriter Set AN/VSC-3(*) Cabling Diagrams

Section IV - Radio Teletypewriter Set AN/GRC-122/142

Installation Procedures

Major Power Switches

Prestart Procedures

Starting Procedures

Tuning Procedures

Operating Communications Terminal AN/UGC-74 (in the ICT State)

Stopping Procedures

Troubleshooting

(Plain and C Models) Power Distribution Panel

(A, B, and E Models) Power Distribution Panel

OWR or DX Inverters

Shelter

Operation

Section V - Radio Set AN/GRC-26D

Installation Procedures

Prestart Procedures

Starting and Preset Procedures

Tuning Procedures

Stopping Procedures

Section VI - Radio Teletypewriter Set AN/GRC-46

Installation Procedures

Preoperational Procedures

Prestart Procedures

Starting Procedures

FSK Reception

Page Printer and Reperforator-Transmitter Operation

FSK Transmission

Stopping Procedures

Section VII - Radio Set AN/FRC-93

Description

Installation Procedures

Preliminary Checks

Receiver Tuning

Transmitter Tuning

VOX Adjustment

Amplifier Tuning

Power Indications

Section VIII - Radio Set AN/VRC-64

Operating Procedures

Section IX - Radio Set AN/VRC-12 Series

Installation Procedures

Operating Procedures

Section X - NRI System AN/VRC-12

Installation Procedures

Prestart Procedures

Starting and Tuning Procedures

Stopping Procedures

Section XI - Radio Set Control Group AN/GRA-6

Installation Procedures (with Radio Set AN/GRC-106)

Operating Procedures

Section XII - Radio Set Control Group AN/GRA-39

Installation Procedures

Operating Procedures

Installation Procedures (using the AN/GRA-39, Receiver/Transmitter RT-524, and Switchboard SB-22/PT)

Presets and Adjustments

Section XIII - Radio Set AN/PRC-77/25

Operating Procedures

Section XIV - Radio Set AN/PRC-104A

Installation and Operating Procedures

Preoperational Checks

Presets

Energizing Procedures

Tuning Procedures

Test Procedures

Operating Procedures

Modes of Operation

Stopping Procedures

Disassemble and Transport Procedures

Operator Daily and Weekly PMCS

Section XV - Radio Set AN/GRC-213

Description

Installation Procedures

Operating Procedures

Preoperational Checks

Presets

Engergizing Procedures

Tuning Procedures

Stopping Procedures

Modes of Operation

Operator Daily and Weekly PMCS

Operator Troubleshooting

Equipment Performance Check (EPC)

Section XVI - Radio Set AN/GRC-193A

Description

Installation Procedures

Operating Procedures

Preoperational Checks

Presets

Energizing Procedures

Tuning Procedures

Stopping Procedures

Modes of Operation

Preventive Maintenance Checks and Services (PMCS)

Operator Troubleshooting

Section XVII - Single-Channel Ground and Airborne
Radio System (SINCGARS) and AN/TSC-124 (SCOTT)

SINCGARS

AN/TSC-124 (SCOTT)

Regency Net System

Chapter 2 - Generator Sets

Section I - Generator Set 10 kW (PU-619)

Installation Procedures

Prestart Procedures

Starting Procedures

Stopping Procedures

Section II - Generator Set 5 kW (PU-620)

Prestart Procedures

Starting Procedures

Stopping Procedures

Section III - Generator Set 3 kW (MEP-026A)

Installation Procedures

Prestart Procedures

Electrical Starting Procedures

Manual Starting Procedures

Stopping Procedures

Chapter 3 - Antennas

Section I - Antenna Selection

Section II - Whip Antenna

Section III - Antenna RC-292

Section IV - Antenna Group OE-254/GRC

Description

Installation

Section V - Doublet Antenna

Determining Doublet Antenna Length

Determining Doublet Antenna Height

Orientation

Installation Using AB-155A/U

Section VI - NVIS Antenna AS-2259/GR

Description

Installation

Section VII - Field Expedients for Antennas

Section VIII - Grounding Systems

Chapter 4 - Communications Security Equipment

Section I - TSEC/KY-8

Programming Instructions

Operating Instructions (with Remote Control Unit)

Operating Instructions (without Remote Control Unit)

Section II - TSEC/KY-38

Programming Instructions

Operating Instructions

Local Remedy for Minor Problems

Section III - HYL-3/TSEC

Prestart Operating Procedures (All Modes)

Retransmission Procedures

Section IV - TSEC/KY-57

Installation in Manpack Operations

Loading Procedures

Operating in the SECURE Mode

Section V - TSEC/KY-65

Installation in Manpack Operations

Installation in Vehicle Operations (AN/GRC-193A)

Installation in Vehicle Operations (AN/GRC-213)

Loading Procedures

Operations

Section VI - TSEC/KG-84A

Description

Chapter 5 - Operating Procedures

Section I - Radiotelephone Procedures

Phonetic Alphabet

Numerical Pronunciation

Prowords Listed Alphabetically

Opening a Net (Nonsecure Voice)

Opening a Net (Secure Voice)

Radio Checks

Passing Message Traffic

Station Entering Net

Station Leaving Net

Closing a Net (Nonsecure Voice)

Closing a Net (Secure Voice)

Radiotelephone Message Format

Section II - Radio Teletypewriter Procedures

Prosigns

Precedence Prosigns (Interservice Use)

Frequently Used Operating Signals

Machine Functions

Establishing Radio Teletypewriter Communications (Continuous Tuning Sets)

Garbled Transmission Received From E6T

Establishing Radio Teletypewriter Communications (Digital Tuning Sets)

Opening a Net

Opening a Directed Net

Sequence of Answering

Station Entering Opened Net

Closing a Net

Teletypewriter Message Format

Teletypewriter Repetition Procedures

Teletypewriter Interrogation Procedures

Section III - Radiotelegraph Procedures

Code Characters

Prosigns

Operating Signals

Opening a CW Net Using Authentication (For Digital Tuning Radio Sets such as the AN/GRC-106 and AN/PRC-70/74)

Tuning Station on a Net (For Continuous Tuning Radio Sets such as the AN/GRC-19, AN/GRC-46, and AN/GRC-26D)

Making a Free Net a Directed Net

Making a Directed Net a Free Net

Closing a CW Net Using Authentication

Closing a CW Net Using Authentication (When closing for a certain period of time)

Radiotelegraph Message Format

Radiotelegraph Message Repetition Procedures (Identification of Parts or Portions of Messages)

Repetition After Receipt

Verfication

Acknowledgements

Section IV - NRI Calls

Section V - Operator Number Sheet and Circuit Log

Operator Number Sheet

Circuit Log

Section VI - Electronic Warfare

Jamming

Implementing ECCM Procedures

MIJI Reporting

Section VII - Using the SOI

Encode and Decode Messages Using KTC-600 Tactical Operations Code

Encrypt/Decrypt Numbers and Grid Zones

Authentication Using KTC-1400D

Section VIII - World Time Zone Conversion Chart

Section IX - United States Message Text Format

Glossary

References

Authorization Letter

---

DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.

*This publication supersedes TC 24-19, 24 June 1985.