Northern Airborne Technology ACP51-100 - Manual (Page 23)

ACP51-100 DACS Audio Control Panel
SM81 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 1 Page 3-2
3.3.1.2 Continuous Built-In Test (CBIT)
The ACP51 requires serial communication with the communications management system (for example
the Northern Airborne Technology Ltd AMU50). If serial communications is lost for more than 0.5 seconds,
all the ACP51 indicators will extinguish and remain off until communication is re-established.
3.3.2 Faceplate Illumination
TX
ICS
ICS RX
ICS
MIN
PTT PRESET
VOX
NORM
A
ISO
CALL
TX
ICS
ICS RX
ICS
MIN
PTT PRESET
VOX
NORM
A
ISO
CALL
TX
ICS
ICS RX
ICS
MIN
PTT PRESET
VOX
NORM
A
ISO
ISO
CALL
P P P
T T T
ISO ISO
ACP51-100 faceplate with blank legends.
The illumination of the ACP51 faceplate is linked to the aircraft dimming buss.
When backlighting is off, there is no faceplate illumination other than Transmit Access indicators (see
section 3.3.3). When backlighting is on, all knobs and legends illuminate to a level proportional to the
aircraft dimming buss level.
ENG-FORM: 806-0113.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Transmit Access Indicator
The ACP51 has eight Transceiver Receive audio volume controls with interchangeable
illuminated legends to allow selection of suitable identification.
Each control is an illuminated rotary knob that is used to control the volume for a specific
transceiver. Rotating the knob clockwise (cw) increases the volume, and counterclockwise
(ccw) decreases the volume. The master RX Volume control can be used to effect a global
adjustment to all Transceiver volume levels (see 3.3.9).
3.3.3 Transceiver Radio Controls
Control
Legend
Each control has a push-on/push-off action to allow individual selection of the required transceivers. In
the on position, the control knob is extended, the volume for the associated transceiver can be adjusted
by rotating the knob, and if backlighting is on, the illumination of the triangular arrow will be at maximum.
In the off position, the knob is retracted (pressed in), the volume is selected to the minimum value (off),
and if backlighting is on, the arrow illumination is minimized or off.