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51
7
DV MODE OPERATION (Optional UT-121 is required for IC-91A)
7
■
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.
q
While receiving an another station’s communication, push
and hold
[RX
➝
CS](CALL)
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 of a commu-
nicating signal again, or set the call sign manually.
w
Push and hold
[BK](9)
for 1 sec. to turn the break-in func-
tion ON.
• “BK” appears.
e
When both stations are in standby, push
[PTT]
to transmit
a break-in call.
• The 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
[BK](9)
for 1 sec. to
turn OFF.
BK
BK
DV
DV
B
LOW
LOW
ATT
ATT
430 712
50
Appears
• How to use the break-in?
While operating with the call sign squelch
(p. 110)
, 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 C calling to Station A with “BK OFF”
Station A
Station B
Station C
• Station C calling to Station A with “BK ON”
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.
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