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7
INTERCOM OPERATION
■ Intercom operation
The optional intercom function allows you to talk to the deck
from the cabin. The optional HM-127
REMOTE-CONTROL MI-
CROPHONE is required for intercom operation.
Connect an optional HM-127 as described on p. 35.
•Transmitting is impossible during intercom operation.
•The received signal is muted during intercom operation.
q Push [LO/DX•IC•SCR] for 1 sec. to enter intercom mode.
•The HM-127 power is automatically turned ON, even if the power
is OFF.
w Push and hold [LO/DX•IC•SCR] 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-M502’s speaker output level, rotate [VOL].
•To adjust the HM-127’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 [LO/DX•IC•SCR] mo-
mentarily.
•Other switches also turn the function OFF, however, the corre-
sponding function is then activated e.g. pushing [16•9] 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.
•When a DSC call is received, “DSC received” appears
and the last received DSC message is displayed after the
intercom use is finished.
•When a WX alert is received, “WX ALT” flashes and a
beep sounds. The WX alert sounds after the intercom use
is finished.
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