Loading and Clearing Offset Frequencies

TM 11-5820-890-10-8

5.7b.

Loading and Clearing Offset Frequencies

DEFINITION

The SINCGARS radio allows single channel frequencies to be offset by

plus or minus 5 or 10 KHz. When operating in the single channel mode,

this capability can be employed to help work through jamming or other

LOADING PROCEDURE

Use the following procedure to load an offset frequency.

Load regular SC frequency (Primary Operator Task 1).

Set FCTN to SQ ON and CHAN to one to be offset

Press FREQ, then OFST, then CHG until desired offset is shown in

RT display.

Use the following procedure to clear an offset frequency

CLEARING PROCEDURE

Set FCTN to SQ ON and CHAN to one to be cleared.

Press FREQ, then OFST then CHG until RT display shows "00."

5.7c.

Scrolling COMSEC Keys

DEFINITION

The SINCGARS radio allows you to move COMSEC keys about in

channels 1 through 5, in both SC and FH modes of communication.

This movement is called scrolling.

USE OF LOADSETS

With normal use of loadsets which align channels and COMSEC keys

according to unit needs, there is limited requirement to scroll TEKs.

EXAMPLE OF NEED

When you change net ID to contact a station in a division other than

your own, you will normally need to use that division's TEK.

EXAMPLE OF USE

You anticipated this need and loaded the additional TEK in your

channel 5, the least used net of the loadset. To contact the other

division, you change the net ID in channel 2, and scroll TEK 5 to

CHAN 2.

Use the following procedure to scroll TEK from one channel to another

SCROLL PROCEDURE

(1-5 only; KEK cannot be moved out of channel 6.)

Set CHAN to the channel to be used.

Press CMSC (RT display shows current TEK).

Press CHG until desired TEK appears.

If COMSEC alarm is heard, press PTT twice to clear it.

Changing CHAN switch to another channel automatically returns

TEKs to their original position.

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