Table 4-11. MODULE TEST SET CONTROLS AND INDICATORS (Cont'd)

TM 11-5895-1141-34

Controls/indicators or

Function

Connectors

JACK UNIT connector J10

This connector provides the power

input and control signals to the jack

unit under test.

EXT SIGNAL INPUT

Connection of external test signal

binding posts E7, E8

source.

Sets frequency of the internal oscil-

switch S1

lator to one of three fixed frequen-

cies: 300, 1000 or 3000 Hz.

OSCILLATOR LEVEL control

Continuous adjustment of oscillator

R15

output level between 0 and 1 volt.

INPUT SELECT switch S11

Routes the internally or externally

generated test signal to one of the

inputs of the module configuration.

Has six positions:

MICROPHONE (microphone amplifier

input)

TELCO (input to jack unit)

TEL 1 (input to recorder mixer

amplifier)

TEL 2 (second input to recorder mixer

amplifier)

MONITOR (input to recorder monitor

syllabic indicator)

RCVR AUDIO (input to selector module)

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