Manual Icom IC-F521 F621 EX(BIIS) (page 8 of 36) (English)

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1 PANEL DESCRIPTION

New2001

[MONI (Audi)]

MONITOR KEY

Activates one of (or two of) the following functions on

each channel independently:

• Push and hold to un-mute the channel (audio is emitted;

‘Audible’ condition).

• Push to toggle the mute and un-mute conditions (toggles

‘Audible’ and ‘Inaudible’)

• Push to mute the channel (sets to ‘Inaudible’ only).

•

Push to un-mute the channel (sets to ‘Audible’ only).

• Push after the communication is ﬁnished to send a ‘reset

code’.

NOTE: The un-mute condition (‘Audible’ condition)

may automatically return to the mute condition (‘In-

audible‘ condition) after a speciﬁed period.

[TONE] C. TONE CHANNEL ENTER KEY

Push this key then input a continuous tone memory

channel number using [CH UP]/[CH DN] keys to

change the tone frequency.

[PA] PUBLIC ADDRESS KEY

When an optional OPC-617

ACC CABLE

is installed, the

audio output via the cable can be controlled from the

transceiver separately from the [VOLUME] control.

• This audio output can be used as a ‘public address’ func-

tion when an external audio amplifier and speaker are

connected additionally.

• Push this key, then speak into the microphone while

pushing the PTT switch.

• The [CH UP]/[CH DN] keys allow you to set the audio

output level from minimum to maximum.

[W/N] WIDE/NARROW KEY

Push [W/N] to toggle the IF passband width between

wide or narrow.

[RX SP] EXTERNAL SPEAKER KEY

When external connections are made for the ‘public ad-

dress’ function, the external speaker drive function is also

available simultaneously. The received audio can be

heard via the external speaker when this key is pushed.

• This function is useful when you are out of the vehicle.

• The audio output level is linked to the transceiver’s vol-

ume control.

[CALL], [CALL A (Code 30)], [CALL B (Code 29)]

CALL KEYS

Transmit a 5-tone/BIIS code.

• Call transmission is necessary before you call another

station depending on your signalling system.

• The [CALL A] and/or [CALL B] keys may be available

when your system employs selective ‘Individual/Group’

calls. Ask your Dealer which call is assigned to each key.

[LOCK] LOCK KEY

Electronically locks all programmable keys except the

following:

• [CALL] (incl. [CALL A] and [CALL B]), [MONI] and

[EMER] keys.

[DTMF Autodial]

DTMF AUTODIAL KEY

Push to select the DTMF channel.

Push [DTMF Autodial] for 1 sec., push [CH UP]/[CH

DN] to select the DTMF channel, then push [DTMF Au-

todial] to transmit the selected DTMF code.

IC-F521 Series_BIIS-2.qxd 05.10.26 11:30 AM Page 5 (1,1)

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Icom IC-F521 F621 EX(BIIS) Manual

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