30
OTHER FUNCTIONS
7

■Intercom operation

The optional Intercom function allows you to talk to the deck
from the cabin. The optional HM-157
COMMANDMIC II
™is
required for Intercom operation.
Connect an optional HM-157 as described on pgs. 35, 52.
•Transmitting is impossible during Intercom operation.
•The received signal is muted during Intercom operation.
qPush [LO/DX•IC]for 1 sec. to enter Intercom mode.
•The HM-157 power is automatically turned ON, even if the power
is OFF.
wPush [LO/DX•IC]for 1 sec. again to call up the HM-157
side.
•The transceiver and the HM-157 emit call beeps.
ePush and hold [PTT] and speak at a normal voice level
into the microphone.
•“”or “”appears on the caller or listener function dis-
play, respectively.
•To adjust the IC-M422’s speaker output level, rotate [VOL].
•To adjust the HM-157’s speaker output level, push [Y]or [Z]
after pushing [VOL• PA/RX ]on the HM-157.
rAfter releasing [PTT] you can hear the response through
the speaker.
tTo return to the normal operation, push [LO/DX•IC]mo-
mentarily.
•[16•9]and [DISTRESS] keys are also available.
•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” appears and the
DSC message is displayed at the channel comment indi-
cator after the Intercom use is finished.
•When a WX alert is received, “WX ALT” blinks and a
beep sounds. The WX alert sounds after the Intercom
use is finished.
HM-157 (listener)IC-M422 (caller)
DIM
HM-157IC-M422