MODE SWITCH POSITIONS AND USES

TM 11-5820-890-10-8

MODE SWITCH

The MODE switch contains three

positions for selecting SC or FH

mode of operation.

It also

provides an FH-M position that

controls net sync time and is for

use by NCS personnel only.

Figure 5-3. MODE Switch

MODE SWITCH POSITIONS AND USES

POSITION

PURPOSE

Selection of the SC position places the radio in the single channel mode of

(Single Channel)

operation.

Selection of the FH position places the radio in the frequency hopping mode of

(Frequency Hopping)

operation.

FH-M*

The FH-M position, used by NCS operators only, causes the NCS radio to

(Frequency Hopping-

electronically keep all net radios within the plus or minus 4 second window

required for frequency hopping communications.

Master)

CHAN (CHANNEL)

This control allows the operator to

select from among eight SC and

six FH channels. These preset

channels are tuned electronically

for ease of operation. Net change

is accomplished by merely moving

the switch from one channel to

another.

Figure 5-4. CHANNEL Switch

CHANNEL SWITCH POSITIONS AND USES

POSITION

PURPOSE

Channel switch positions 1 through 6 are used for SC and/or FH nets. These

channels are routinely loaded with COMSEC keys, FH data, and sync time as

required for unit communications.

CUE

With the correct SC frequency loaded in this position, an operator with a

non-FH radio is able to contact a frequency hopping net. This position may

be used for another SC net if desired.

MAN

The Manual position is required for sending and receiving the Cold Start net

opening ERF. This position also may be used for another SC net.

(Manual)

5-7