Icom iF25 S Scrambler function, Setting the squelch level, Man Down Emergency Call, Upper

3 CONVENTIONAL OPERATION

■Scrambler function

The optional voice scrambler units UT-109 (#01) and UT-110 (#01) provide high performance private communication between stations with the same scrambler codes.

➥Push and hold [Scrambler] to turn the scrambler function ON.

➥Push [Scrambler] to turn the scrambler function OFF.

■Setting the squelch level

The squelch circuit mutes the received audio signal depending on the signal strength.

CONVENTIONAL OPERATION 3

■Man Down Emergency Call

The man down emergency call function transmits an emergency

call automatically, after the transceiver laying down in a horizontal 3 position for a pre-set time period. (The optional UT-113 MAN DOWN UNIT is required.)

After the emergency call, the transceiver performs transmission and reception alternately with the following conditions:

-Transmits the microphone signals.

-Receives the signal and emits audio.

When the emergency cancel code is received, the function is can- celled.

qWhile pushing [PTT] and [Lower],

rotate [VOL] to turn the power ON to enter the squelch level adjust- ment mode.

wPush [Upper] to increase the

squelch level (tight squelch) or [Lower] to decrease the squelch level (loose squelch).

eRotate [VOL] to turn the power OFF to fix the squelch level.

[VOL]

[Upper]

[PTT] [Lower]

IMPORTANT!: Set an emergency channel individually, to provide certain emergency call operation is recommended.

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