Northern Airborne Technology DA80 - Manual (Page 27)

SM57 Rev. 4.10 DA80 DigiVOX™ Digital Intercom Manual
3.3.3.2 DA80-010
The DA80-010 VOX SQUELCH control is marked AUTO in its fully ccw position, and
PTT in its fully cw position.
When the VOX SQUELCH control is set fully cw (PTT), the microphones will be muted
except when the intercom PTT line is activated (grounded).
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 ccw position, the AutoVOX™ mode is activated. The ambient noise at the
microphone will 'automatically' set the VOX threshold.
3.3.4 TX/ICS Indicator
The TX/ICS indicator is a dual-color LED, which will illuminate green during radio
transmit operations and amber during ICS operations.
3.4 Mute Functions
3.4.1 ICS Mute Functions
Normal Mode Pilot ISO
PLT Tx Key Mute No Mute
COP Tx Key Mute No Mute
3.4.1.1
DigiVOX™ Mode
In DigiVOX™ mode, intercom audio will mute at all positions whenever the pilot or
copilot ‘Keys’ the radio.
3.4.1.2
PILOT ISO
In PILOT ISO mode, copilot and passenger intercom audio will not mute when the pilot
or copilot ‘Keys’ the radio. The pilot has no connection to any intercom or music
functions and therefore no muting is required.
Oct 13, 2004 Page 3-3
ENG-FORM: 806-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.