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INTERCOM OPERATION
■ Intercom operation
The optional intercom function allows you to talk to the deck
from the cabin. The optional HM-134*
REMOTE
-
CONTROL MI
-
CROPHONE
is required for intercom operation.
*DO NOT connect another remote-control microphone.
Connect an optional HM-134 as described on p. 39.
•Transmitting is impossible during intercom operation.
•The received signal is muted during intercom operation.
q Push and holding [DIMMER] for 1 sec. to enter intercom
mode.
•The HM-134 power is automatically turned ON, even if the power
is OFF.
w Push and hold [DIMMER] again to call up.
•The transceiver and microphone emit call beeps.
e Push and hold the PTT switch and speak at a normal voice
level into the microphone.
•“TALK” or “LSTN” appears on the caller or listener function dis-
play, respectively.
•To adjust the IC-M503’s speaker output level, rotate [VOL].
•To adjust the HM-134’s speaker output level, push [Y]/[Z] after
pushing [VOL].
r After releasing the PTT switch you can hear the response
through the speaker.
t To return to normal operation, push [DIMMER] momentar-
ily.
•Other switches also turn the function OFF, however, the corre-
sponding function is then activated e.g. pushing [16] selects
Channel 16.
•While in the intercom mode, the transceiver functions
(transmit and receive) are interrupted. If the transceiver is
in transmit condition, the intercom function is not avail-
able.
Intercom
INT
INT
TALK
IC-M503 (caller) HM-134 (listener)
Intercom
INT
INT
IC-M503 HM-134
01 IC-M503-(1).qxd 01.12.17 5:00 PM Page 17 (1,1)