FCTN CONTROL POSITIONS AND USES

TM 11-5820-890-10-8

FCTN (FUNCTION)

This is the primary control with

which the operator determines

what function the radio is to

perform. The FCTN switch has

nine positions, as described

below.

Figure 5-2. FCTN (Function) Switch

FCTN CONTROL POSITIONS AND USES

PURPOSE

POSITION

OFF

All power IS shut off; all stored data, (COMSEC, FH. sync time, and manpack

battery life indicator) are deleted after 5 seconds; radio is completely

inoperative; position is used when radio is not is use and for storage.

Z-FH

Clears all FH data after 5 seconds: operator pauses in this postion for 5

seconds when setting FCTN switch to OFF.

(Zero-FHdata)

STBY

Makes radio Inoperative but all stored data is retained; sync time is lost after 24

hours; setting FCTN to SQ ON returns radio to fully operational status. In STBY,

(Stand By)

power IS drawn from main source. (RT-1523B/C/D/E standby time has been

Increased to 200 hours.)

TST

This position causes RT to perform self-test of RT, data, and ECCM circuits;

test results are shown in RT display. Running RT self-test IS a routine step in

(Test)

start up procedure.

The load position is required for loading SC frequencies, FH data, and

COMSEC keys; required also to receive an ERF.

(Load)

SQ ON

This is the normal operating position of the radio for FH mode. For SC mode,

this position reduces noise.

(Squelch On)

SQ OFF

This position IS not used for the FH mode. In the SC mode, SQ OFF helps to

bring in distant stations, to work through jamming, and to be compatible with

(Squelch Off)

radios lacking squelch capability.

REM

The REM position disables front panel controls and is required for use of the

Control-Monitor and Remote Control Unit (RCU).

(Remote)

RXMT

Use of the RXMT position enables the RT to automatically retransmit traffic from

one radio through another. Both RTs are set to RXMT position and connected

(Retransmit)

by an RXMT cable.

5-6