Icom IC-F9521T - Page 49

APCO P25 Mode Operation
Receiving (Reviving the transceiver)
A Radio Uninhibit signal revives the inhibited
transceiver.
1When an inhibited transceiver receives a radio
uninhibit signal, the Busy/Transmit indicator does
not light because the Radio Inhibit is still activated.
2
An acknowledgement is automatically transmitted
4Push [CH Up] or [CH Down], or rotate
[CH Up/Down] to select the desired ID (or name).
• Push and hold [Digital Button] for 1 sec to
cancel and return to normal operation.
• The ID can be edited with the 10-keypad*.
(Depending on the pre-set value.)
*10-key models only.
5
Ph
[PTT]
t t it th t it ig l
2
An acknowledgement is automatically transmitted
,
and the transceiver is revived and returns to
normal operation.
• The Transmit indicator lights red.
5
P
us
h
[PTT]
t
o
t
ransm
it th
e
remo
t
e
mon
it
or
s
ig
na
l
to the target station.
• The Transmit indicator lights red.
• “PLEASE WAIT” is displayed.
6Release [PTT].
• “ACK RECEIVED” is displayed after receiving an
acknowledgement from the target station, and
then the transceiver returns to normal operation
 NOTE: If the transceiver is not revived even, after a
 Radio Uninhibit signal is received, cloning is
 required to revive it.
■
Remote Monitor function
then the transceiver returns to normal operation
.
• Busy indicator lights green.
• “NO ACKNOWLDG” is displayed when an
acknowledgement is not received and the
transceiver returns to normal operation.
Receiving
➥ When a remote monitor signal is received, the
transceiver automaticall
y
transmits an
■
Remote Monitor function
Transmitting
A Remote Monitor function allows you to send a
signal that requires the target station to transmit
audio from the microphone.
[Digital Button] key assignment is necessary to
transmit the remote monitor signal.
y
acknowledgement and audio*.
*The audio is transmitted for a pre-set time
period.
•The Busy indicator lights green while
receiving, and lights red while transmitting an
acknowledgement or the audio.
 NOTE: When the optional SM-25 desktop

1Push [Digital Button] to enter the digital call type
selection mode.
2Push [CH Up] or [CH Down], or rotate [CH
Up/Down] to select “RDO MONITOR.”

microphone, HM
-
152T or HM
-
148T hand
 microphones are connected, the audio will not
 be transmitted.
■ Radio Check function
Transmitting
A Radio Check function allows an operator to know
3Push [Digital Button] again to enter the
Individual ID selection mode.
• A pre-programmed ID name is displayed.
• When the ID name is not programmed,
the ID code is displayed.
if the target station is within communication range.
The target station transceiver automatically
responds after receiving a radio check signal.
[Digital Button] key assignment is necessary to
transmit the radio check signal.
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