Chapter 2. OPERATING INSTRUCTIONS

TM 11-6625-2946-14/TM 08168A-14/1

CHAPTER

OPERATING INSTRUCTIONS

S e c t i o n I. SERVICE UPON RECEIPT OF MATERIEL

2-1.

Unpacking

the instructions of TM 38-750. The equipment should be

placed in service, even though a minor assembly or part

that does not affect proper functioning is missing.

2-2. Checking Unpacked Equipment

c. Check to see if the equipment has been modified.

(Equipment which has been modified will have the

a. Inspect the test set for damage incurred during ship-

MWO number on the front panel, near the nomen-

ment. If the equipment has been damaged, report the

clature plate.) Check also to see whether all currently ap-

damage on SF 364 (Para 1-3 b).

plicable MWO'S have been applied. (Current MWO'S

b. Check the equipment against the components listed

applicable to the equipment are listed in DA Pam

in Appendix C and the packing slip to see if the shipment

310-7.) Marines should refer to SL1 -2.

is complete. Report all discrepancies in accordance with

Section

ii.

CONTROLS

AND

indicators

2-4. Operator Controls

2-3. General

All operating controls, indicators, and input and output

Haphazard operation, or improper control settings

connectors, as listed and functionally described in table

could damage equipment. It is, therefore, essential that

2-1, are located on the test set front panel (fig. 2-l).

all operating controls and indicators be fully understood

before placing the test set in use.

Table 2-1. Operating Controls, Indicators, and Connectors

Control, indicator,

or connector

Selects 14 vdc battery (BAT) or 24 vdc external (EXT) power source. Removes input power in center (OFF)

POWER switch

position.

Spring-loaded circuit breaker. Resets in up position.

RESET switch

FUNCTION switch

selects test mode:

FSM rf field strength measurement

RCV receiver sensitivity measurement

XMT transmitter rf output power measurement

BAT battery condition test

FREQUENCY CODE switches

Selects desired rf output frequency of test set signal generator, corresponding to frequency of radio set being

tested .

Initiates measurement of receiver quieting over a preset 14 dB noise level to provide indication of receiver gain

SENS READ pushbutton

switch

on the meter.

Meter

Provides a go (green)/no-go (red) reading to indicate status of battery or radio set under test in BAT, XMT,

or RCV test modes. Provides measurement of rf signal detected by FSM ANTENNA in FSM mode.

FSM ANTENNA

Antenna for reception of radiated rf output of transmitter for measurement of its field strength.

BATTERY connectors

Polarized, pressure-lock type connectors for input from battery under test, secure battery to test set front

panel.

Polarized, pressure-lock type connectors to provide input power to radio set under test, secure radio set to test

RADIO connectors

set front panel.

For test set 24 vdc input voltage from external power source.

24 VDC EXT connector

Input connector for receiver audio from radio set AUDIO connector.

AUDIO connector

ANTENNA connector

Input connector for radio set transmitter rf output.

2-1