50
OTHER FUNCTIONS
7
■ Intercom operation
The optional Intercom function allows you to talk to the deck
from the cabin. The optional command microphone is
required for Intercom operation.
Connect an optional command microphone as described on
p. 63.
• Transmitting is impossible during Intercom operation.
• The received signal is muted during Intercom operation.
q Push and hold [LO/DX•IC•SCRM] for 1 sec. to enter Inter-
com mode.
• The optional command microphone power is automatically
turned ON, even if the power is OFF.
w Push and hold [LO/DX•IC•SCRM] for 1 sec. again to call
up the optional command microphone side.
• The transceiver and the optional command microphone emit call
beeps.
e Push and hold [PTT] and speak at a normal voice level
into the microphone.
•“
TTAALLKK
” or “
LLIISSTTEENN
”* appears on the caller or listener function
display.
* “ ” or “ ” appears on the HM-157.
• To adjust the IC-M504’s speaker output level, rotate [VOL].
• To adjust the HM-162’s speaker output level, rotate [SELEC-
TOR] after pushing [VOL] on the HM-162.
• 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•SCRM]
momentarily.
• [16•9] and [DISTRESS] keys are also available.
