ICOM 288800 Manuale Utente

51

7

DV MODE OPERATION (Optional UT-121 is required for IC-91A)

■ Break-in communication

The break-in function allows you to break into a conversation,
where the two original stations are communicating with call
sign squelch enabled (p. 00).

q While receiving an another station’s communication, push

and hold [CALL/RX

➝CS] for 1 sec. to set the communi-

cating station’s call sign.

• When a call sign has not been received correctly, error beeps

sound and no call sign is set. Receive the call sign included in a
communicating signal again, or set the call sign manually in this
case.

w Push and hold [9/T.SCAN/BK] for 1 sec. to turn the break-

in function ON.

• “BK” appears.

e When both stations are in standby, push [PTT] to transmit

a break-in call.

• Programmed call sign station receives the break-in call as well

as your call sign.

r Wait for the reply call from the station who receives the

break-in call.

t After receiving the reply call, communicate normally.
y To cancel the break-in, push and hold [9/T.SCAN/BK] for

1 sec. to turn OFF.

BK

BK

DV

DV

B

LOW

LOW
ATT

ATT

PSKIP

PSKIP

50

Appears

While operating with the call sign squelch (p. 00), the
squelch never opens (no audio sounds) even if a call is re-
ceived, unless your own call sign (“MY”) is specified.
However, when the call including the “BK ON” signal 

(break-

in call)

is received, the squelch will open and audio sounds

even if the call is specified for another station.

Station A

Station B

Station C

Station A

Station B

Station C

Station A and B are 
communicating us-
ing the call sign 
squelch.

Station A and B are 
communicating us-
ing the call sign 
squelch.

Station B never hears that 
Station C is calling Station A.

Station B also hears that Sta-
tion C is calling Station A.