Northern Airborne Technology DA80 - Manual (Page 26)

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10
3.3.1.2
PILOT ISO
The PILOT ISO position isolates the pilot from all intercom and music functions. The
aircraft radio connects to the pilot’s mic and headset directly. The copilot and
passengers will not be able to hear the aircraft radio audio, but will retain intercom and
music functions.
CAUTION
In PILOT ISO, the copilot position cannot transmit mic audio
but can still key the radio.
3.3.2
ICS VOLUME Control
The ICS VOLUME control is a rotary switch that is used to control the intercom volume
for all headsets. With ICS VOLUME set fully ccw, intercom volume will be at a
minimum. As the operator rotates the control cw, intercom volume will increase.
CAUTION
The DA80 has no front panel radio volume control. Take
care when adjusting aircraft radios as low radio volume may
affect the DA80 mute functions.
3.3.3
VOX SQUELCH Control
The DA80 VOX SQUELCH control is a rotary control that is used to set the level of audio
required to activate the microphones.
3.3.3.1 DA80-001
The DA80-001 VOX SQUELCH control is marked LIVE in its fully ccw position, and
AUTO in its fully cw position.
When the VOX SQUELCH control is set fully ccw (LIVE), the microphones will be active
at all times (Hot Mic). Ground operations, where little background noise is present,
commonly use this setting.
As the operator rotates the control in a cw direction the amount of audio required to
activate the microphone(s) increases. Noisy conditions, where ‘pilot fatigue’ may result,
commonly use this setting.
In the fully cw position, the AutoVOX™ mode is activated. The ambient noise at the
microphone will 'automatically' set the VOX threshold.
Page 3-2 Oct 13, 2004
ENG-FORM: 806-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.