Chapter 1. INTRODUCTION

TM 11-5815-238-20

CHAPTER 1

INTRODUCTION

Section I. GENERAL INFORMATION

1-1. SCOPE

TYPE OF MANUAL: Organizational Maintenance

EQUIPMENT NAME AND MODEL NUMBER:

High Level Equipment

Teletypewriter Set

ANIGGC-3

Teletypewriter Reperforator-Transmitter

TT-76/GGC

Teletypewriter Set

ANIGGC-3A

Teletypewriter Reperforator-Transmitter

TT-76AIGGC

TT-76B/GGC

Low Level Equipment

TT-76CIGGC

Teletypewriter Set

ANIGGC-53

Teletypewriter Reperforator-Transmitter

TT-699/GGC

Teletypewriter Set

AN/GGC-53A

Teletypewriter Reperforator-Transmitter

TT-699AIGGC

TT-699BIGGC

TT-699CIGGC

The ANIGGC-3(*) and TT-76(*)/GGC are high-level equipment which operate with a line current of 20 or 60mA

(milliamperes). The ANIGGC-53(*) and TT-699(*)IGGC are low-level equipment which operate with a line current of

approximately 100 mallow-level equipment is high-level equipment which has been modified for low-level signaling

operation.

PURPOSE OF EQUIPMENT: Teletypewriter Sets AN/GGC-3(*) and AN/GGC-53(*) are lightweight, transportable

units which can be used in either fixed or mobile teletypewriter stations. They provide facilities for manual

transmission direct from keyboard and for tape transmission from transmitter-distributor. Received messages are

printed and perforated on paper tape for later transmission.

Teletypewriter Reperforator-Transmitters TT-76(*)IGGC are used to send and receive over direct current (dc)

wirelines carrier, or radio systems when used with Telegraph Terminal TH-5/TG, or similar line terminating devices.

Teletypewriter Reperforator-Transmitters TT-699(*)IGGC are used to send and receive over dc (6-volt polar) signal

circuits only.

NOTE

For details on purpose of equipment, refer to Operator's Manual TM 11-5815-238-10.

1-1