Northern Airborne Technology AMS43 - Manual (Page 6)

AMS43 Single Channel Audio Controller
SM59 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-2
ENG-FORM: 800-0113.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Input Power 27.5 Vdc Nominal 0.50 A Max.
Lighting 27.5 Vdc @ 160 mA
Alert Power 27.5 Vdc Nominal 150 mA Max.
Input Signals:
Quantity 13 receive channels
7 mic channels
1 ICS tie channel
2 direct channels
Audio level 2.5 Vrms for receiver inputs
0.25 Vrms for mic inputs
0.34 Vrms for ICS tie input
2.5 Vrms for direct audio inputs
Impedance 1 k
Ω ±10% for receive inputs
1 k
Ω ±10% for mic inputs
1.8 k
Ω ±10% for ICS tie input
1.3 k
Ω ±10% for Direct Audio1 input
100
Ω ±10% for Direct Audio 2 input
Circuitry Type All are single ended inputs.
Coupling <-50 dB
Key lines Pilot & copilot transmit PTT
Rear hand mic transmit PTT
Pilot & copilot ICS PTT
3 Alerts - active low
Output Signals:
Quantity 6 Headset outputs
6 Transmitter mic outputs
5 Transmitter keyline outputs
Rated level:
Headset 7.7 Vrms or 100 mW (20 dBm) into 600
Ω
Direct Audio1 10 mW (10 dBm) into 600
Ω
Direct Audio 2 0.1 mW (-10 dBm) 0.25 Vrms into 600
Ω
Alert 90 mVrms
±10% into 600 Ω
Impedance 65
Ω Max
Circuitry Type Single-ended, except for phones, which are balanced.
Freq. Response:
Sidetone <3 dB from 650 Hz to 1750 Hz
Receive inputs <3 dB from 500 Hz to 2200 Hz