Northern Airborne Technology AMU50-001 - Manual (Page 10)

AMU50-001 Audio Management Unit
SM76 Installation and Operation Manual
Section 1 Rev: 1.03
Issue 1 Page 1-7
ENG-FORM: 800-0116.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Discrete Outputs
All the following outputs have these specifications unless stated otherwise.
Logic: Active LO, switched ground
Output Active: ≤2 Ω
Current: 1 A maximum
Transmit Push-To-Talk Outputs
Quantity: Eight
Crew Isolation Output (CREW ISO OUT)
Quantity: One
Aural Alert Active Output (ALERT ACTIVE)
Quantity: One
DF Blanking Output (DF BLANKING OUTPUT)
Quantity: One
Emergency Mode Active Output (EMERG/BACKUP OUT)
Quantity: One
BI-DIRECTIONAL PORTS
USB Port
Quantity: One USB 2.0 (for programming)
ICS Tieline
The ICS tie line can be configured (using DevCs) for analog or digital operation.
Analog:
Quantity: One
Output Impedance: 2000 Ω +/-10%
Rated Level: 230 mVrms into 1000 ohms +/-15%
Circuitry Type: Balanced
Digital:
Quantity: One
Specification: RS422
Serial Data Protocol: SP/DIF
1.4.1.1 Audio Performance
The AMU50 meets the requirements of FAA TSO-C139, EASA ETSO-C50c and RTCA/DO-214 Class Ib.
Audio Frequency Response:
<3dB from 300 - 6000Hz
Volume Controls:
40dB of adjustment (individual receive audio and intercom audio)
30dB of adjustment (master receive audio)