AUDIO SYSTEM - CONTROLS AND INDICATORS
1 COM1 pushbuttons (MIC and AUD)
• pressed .............. selects / deselects VHF 1 communications
radio
• MIC illuminated .. VHF 1 communications radio selected for
transmission.
When MIC pushbutton is pressed to
select, any other previously selected MIC
pushbutton extinguishes and the
associated AUD pushbutton, if not
illuminated, illuminates.
• AUD illuminated . VHF 1 communications radio selected for
monitoring of received audio.
2 COM2 pushbuttons (MIC and AUD)
• pressed .............. selects / deselects VHF 2 communications
radio
• MIC illuminated .. VHF 2 communications radio selected for
transmission.
When MIC pushbutton is pressed to
select, any other previously selected MIC
pushbutton extinguishes and the
associated AUD pushbutton, if not
illuminated, illuminates.
• AUD illuminated . VHF 2 communications radio selected for
monitoring of received audio.
3 COM3 pushbuttons (MIC and AUD) – Note: Inoperative if COM 3
radio is not installed.
• pressed .............. selects / deselects COM 3
communications radio
• MIC illuminated .. COM 3 communications radio selected for
transmission.
When MIC pushbutton is pressed to
select, any other previously selected MIC
pushbutton extinguishes and the
associated AUD pushbutton, if not
illuminated, illuminates.
• AUD illuminated . COM 3 communications radio selected for
monitoring of received audio.
4 HF pushbuttons (MIC and AUD)
• pressed .............. selects / deselects HF communications
radio
• MIC illuminated .. HF communications radio selected for
transmission.
When MIC pushbutton is pressed to
select, any other previously selected MIC
pushbutton extinguishes and the
associated AUD pushbutton, if not
illuminated, illuminates.
• AUD illuminated . HF communications radio selected for
monitoring of received audio.
NOTE
Inoperative if HF radio is not installed.
5 FONE p/b
• pressed ......... selects / deselects a full duplex
communication device such as a SATCOM
and does not have an audio selection button
that is independent of the microphone
• illuminated ..... full duplex communication device such as a
SATCOM selected for communication
When FONE pushbutton is pressed to select,
any other previously selected MIC
pushbutton extinguishes
NOTE
Inoperative if Telephone is not installed.