Northern Airborne Technology AMS43, Инструкция по установке и эксплуатации

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SM59 Rev. 4.00 AMS43 Single Channel Audio Controller Manual
Nov 10, 2003 Page 2-3
ENG-FORM: 805-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
The S/T LEVEL trimpot adjusts the internal gain of the sidetone (S/T) of the selected
transceiver (from the front panel) in the user’s headphones.
The
VOX LEVEL trimpot sets the sensitivity level for the front panel VOX control (the
level of audio required to activate microphones).
The
POWER ON LED will illuminate to indicate that the unit is connected to the power
supply.
2.3.4.2
Right Side Panel Adjustments
A variety of different signals can be selected to trigger the internal Alert signals. The
trimpots on the right side panel are used to adjust the characteristics of the audible
signals that the user will hear.
Audio Alert 1 is a single tone signal and Audio Alerts 2 and 3 are two-tone signals. The
pitch of the signals can be adjusted using the relevant
TONE trimpot, and the cycling
rate of the two-tone signals can be adjusted using the RATE trimpots. The duration of
Audio Alert 3 can be adjusted from one to three seconds using the TIME trimpot.
The
DIR AUD LEVEL trimpot is used to adjust the audio level of the devices connected
to the DIR AUD 1 input.
2.3.5 Post-Installation Checks
If any preset requires adjustment, be sure this is carried out before the aircraft leaves,
and that the unit and its mating connector are secured before departure.
2.3.5.1 Voltage/Resistance
Checks
Do not attach the AMS43 until the following conditions are met.
Check the following:
a) P101
pins <16> and <17> for +28 Vdc relative to ground.
b) P101 pin <34> for continuity to ground (below 0.5
Ω
).
c) P102 pin <19> for +28 Vdc lights bus voltage.
d) Check all Mic, phone, music and key lines for shorts to ground or adjacent pins.