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.
