Northern Airborne Technology AA9x - Manual (Page 6)

AA9x Series Single Channel Audio Controller
SM56 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
Nominal 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
1 or 2 direct channels
Audio level 2.5 Vrms for receiver inputs
0.25 Vrms for mic inputs
2.5 Vrms for direct audio inputs
Impedance 1 k
Ω ±10% for receive inputs
1 k
Ω ±10% for mic inputs
1.6 k
Ω ±10% for ICS tie input
1.3 k
Ω ±10% for Direct Audio1 input
100
Ω ±10% for Direct Audio 2 input
Circuit Type All are single ended inputs
Coupling <-40 dB
Keylines Pilot & copilot transmit PTT
Rear hand mic transmit PTT
Pilot & copilot ICS PTT
3 Alerts - active low
Output Signals
Quantity 6 Headphone outputs
Up to 7 Transmitter mic outputs (incl. PA)
Up to 7 Transmitter keyline outputs (incl. PA)
Headphone 7.7 Vrms or 100 mW (20 dBm) into 600
Ω nominal
Direct Audio 1 10 mW (10 dBm) into 600
Ω nominal
Direct Audio 2 0.1mW (-10 dBm) 0.25 Vrms into 600
Ω nominal
Alert 90 mVrms
±10% into 600 Ω nominal
Circuitry Type Headphones are balanced
Mic and ICS Tie are single ended
Distortion <10% THD @ nominal power output
Audio Noise Level >50 dB down from rated output (no signal)
Coupling <-40dB
Output Regulation <10% distortion @ 3 dB max. of rated output power at 400% and
75% of rated load