Northern Airborne Technology AMS50 - Manual (Page 52)

AMS50-000 Stereo Audio Panel with Marker Manual SM50 Rev. 4.00
The table below shows how the illumination of the LED varies in each ICS mode.
VOX LED (Green)
All Mode Crew Mode Pilot ISO
PAX ICS On Off On
Pilot ICS On On Off
Co-pilot ICS On On On
3.2.5.3 Manual
Fail-safe
Manual fail-safe operation is available in the event of a partial failure (for example headset
amp failure or any suspected abnormal operation). To ‘reset’ the unit, turn the ICS volume
control to the OFF(EMG) position (turned ccw until it clicks), and then back ON. If left in the
OFF(EMG) position, it will route the Pilot directly to the COM1 radio and the unswitched
direct audio inputs, and turn the system off for the Co-pilot and Passengers.
CAUTION
If the emergency voltage of the aircraft falls below 11 Vdc,
the unit must be run in the Manual Fail-safe mode to ensure
correct operation.
3.2.6 Marker Beacon
The AMS50 contains a built-in Marker Beacon receiver with a three light display. The
white light marked ‘A’ will illuminate when the signal from the ‘Airways’ (or ‘Inner’)
beacon is received; the blue light marked ‘O’ will illuminate at the ‘Outer’ beacon; and
the amber light marked ‘M’ will illuminate at the ‘Middle’ beacon.
3.2.6.1
Sensitivity Button (SENS)
The switch below the ‘A’ light is used to select between ‘HI’ and ‘LO’ for the ‘en route’
and ‘approach’ sensitivity of the Marker Beacon receiver. Either the HI or LO LED
above the switch will illuminate green to indicate the current selection.
3.2.7 Automatic Fail-safe
Automatic fail-safe operation is a standard feature in the event of a power failure. The
Pilot is routed directly to COM1 and the unswitched direct audio inputs. The system is
off for the Co-pilot and Passengers.
Page 3-6 Nov 12, 2003
ENG-FORM: 806-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.