29
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.
Intercom
INT
INT
TALK
IC-M502 (caller)
HM-127 (listener)
Intercom
INT
INT
IC-M502
HM-127
