Northern Airborne Technology AMU50-001 - Manual (Page 14)

AMU50-001 Audio Management Unit
SM76 Installation and Operation Manual
Section 2 Rev: 1.04
Issue 1 Page 2-2
ENG-FORM: 805-0120.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4.2 Cautions
CAUTION:
Do not bundle any lines from this unit with transmitter coax feed lines. Do not
bundle any logic, audio, or DC power lines from this unit with 400 Hz synchro
wiring or AC power lines. Do not position this unit next to any device with a
strong alternating magnetic field such as an inverter, motor or blower, or
significant audio interference will result.
CAUTION:
In all installations, use shielded cable exactly as shown, and ground only as
indicated. Significant problems may result from not following these guidelines.
Failure to follow the installation and wiring instructions provided in this manual
for power and ground connections, including the rating of the circuit breaker,
may lead to damage in the power input circuitry of the unit.
CAUTION:
Installation Limitations
1. Mounting
The AMU50 must be mounted to an aluminium surface at least 376mm x
333mm x 1.27mm thick (14.8" x 13.1" x 0.050" thick) or equivalent for proper
heat dissipation. Failure to do this may mean that the unit will not meet its
minimum performance standard requirements at the operating high
temperature defined in the environmental qualification form.
2. Approved Configurations
The DACS has only been tested to demonstrate compliance with the
requirements of TSO-C139 and ETSO C50c with the configuration settings
listed below. Settings other than those listed are not approved.
DevCs Explorer
Panel Item Data Edit Panel Parameter Selection
AMU50 ICS Tie Line Analog
MIC Impedance 150 Ohm Users (User 1 to
User 7)
Mic/Headphone:
Phone Impedance 150 Ohm
MIC Impedance
150 Ohm Emergency Mode User 1 and 2:
Phone Impedance 150 Ohm
These settings are selected through the DevCs (NAT P/N: 79-04-001 Revision
1.5.0.0 or later).