Northern Airborne Technology AA36-100 - Manual (Page 15)

SM58 Rev. 4.00 AA36-100 Digital ICS Tie Line Adapter Manual
2.3.4 Installation
Options
The AA36-100 can be set to support the following installation configurations:
• NAT or SuperNAT bi-directional ICS tie to ‘universal’ bi-directional (e.g. dB systems,
Gemelli, Andrea, etc.)
• NAT to SuperNAT bi-directional tie lines
• NAT or SuperNAT bi-directional to ‘universal’ unidirectional (e.g. mic and phones)
The PHONES source for the ‘universal’ unidirectional tie line may contain intercom and/or
radio audio. Verify that this information will be acceptable for connection to the new
audio/intercom system (i.e. NAT product) before proceeding with the planned installation.
The AA36-100 is designed for use with 4 different proprietary bi-directional tie lines.
Each tie line has unique voltage and impedance levels. Driving these proprietary tie
lines with incorrect power levels may damage the AA36-100 or the proprietary audio
intercom system.
CAUTION
Be sure the correct tie line level and impedance is selected
before applying power to the unit.
2.3.5 Adjustments
The unit ships from the factory with all internal adjustments set to the normal test levels.
Once installed in the aircraft, it may be desirable to change these settings to suit the
installed proprietary tie line.
Cover Plate Screws
The internal adjustments are located along the right side of the unit and can be identified
from Options drawing AA36\100\404-0. To access the adjustment holes it is necessary
to remove the Cover Plate by unfastening the three panhead screws shown above.
2.3.5.1 PHONES INPUT switch
This ten-position rotary switch is used to set the input level for the unidirectional tie line
to suit the expected output from the audio panel. The rated inputs are 0.5, 1, 2, 2.5, 4,
4.5, 5.5, 6, 8 and 8.5 Vrms.
Nov 14, 2003 Page 2-3
ENG-FORM: 805-0104.DOT
PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.