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30
OTHER FUNCTIONS
New2001
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.
q
Push
[LO/DX•
IC
]
for 1 sec. to enter Intercom mode.
• The HM-157 power is automatically turned ON, even if the power
is OFF.
w
Push
[LO/DX•
IC
]
for 1 sec. again to call up the HM-157
side.
• The transceiver and the HM-157 emit call beeps.
e
Push 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.
r
After releasing
[PTT]
you can hear the response through
the speaker.
t
To 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-157
IC-M422
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