Northern Airborne Technology ACP53-001 - Manual (Page 26)

ACP53-001 DACS Audio Control Panel
SM75 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 1 Page 3-5
ENG-FORM: 806-0113.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.4.7 VOX Threshold
MIN
PTT PRESET
VOX
MIN
PTT PRESET
VOX
PRESET
When the VOX pot is set fully ccw into the detent, the intercom audio will be in the PRESET VOX
position. The preset threshold is selected at installation.
MIN (Hot Mic Operation)
When the VOX pot is set fully ccw to the MIN position, the intercom audio will be easily activated. (Take
care not to rotate the control into the detent position to the PRESET position.)
PTT (Keyed ICS Operation)
Keyed ICS is activated when switched by an ICS PTT switch.
VOX (Voice Activated)
Set the VOX control fully ccw and then slowly rotate cw just to the point where no intercom audio can be
heard. This setting will vary with ambient noise conditions, and the quality and number of microphones
connected in the system.
3.4.8 Transmit Selector Switch
ICS PTT ICS PTT
3.4.9 TX/ICS PTT Switch
TX
ICS
TX
ICS
The VOX control is a rotary control used to select the VOX threshold of the unit.
When the control is rotated full cw, the threshold is at maximum, and when rotated fully
ccw to the detent, the threshold is at minimum. When rotated ccw into the detent, the
ACP53 is in the PRESET position.
The Transmit (TX) Selector is a nine position rotary switch used to select the
transceiver for transmission. For additional information see section 3.4.14.
When the TX Selector switch is turned fully ccw, it will be aligned with the ICS
position. Each of the other positions will align with one of the selectable
transceivers.
The TX/ICS PTT switch is a momentary centre-off toggle switch, labelled ICS and TX.
When the ICS/TX switch is held in the ICS position, the ACP53 will key the ICS for all
users assigned to the ACP.
When the ICS/TX switch held is in the TX position, the ACP53 will key the transceiver
selected by the TX selector switch, and will route the audio from the microphones of all
users assigned to the ACP to the transceiver.