Icom IC-M422 7 OTHER FUNCTIONS, ■Intercom operation

7 OTHER FUNCTIONS

■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.

IC-M422 HM-157

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• DIM PA/RX ] on the HM-157.

IC-M422 (caller) HM-157 (listener)

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.

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