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SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual
Bidirectional Signals
ICS TIE Channel:
Quantity 1
Rated level 340 mVrms nominal (170 to 680 mVrms)
Impedance 2 kOhm ±10 %
Circuitry type unbalanced
Output Signals
Phones:
Quantity 4 (Pilot, Copilot, 2 Passengers)
Rated level >5.5 Vrms (>100 mW, RX, ICS and music)
>0.7 Vrms (TX sidetone, adjustable)
1.5 Vrms nominal (Pilot ISO mode)
>0.2 Vrms (Automatic failsafe mode)
Impedance 300 Ohm ±10 %
Circuitry type transformer, unbalanced
Mics:
Quantity 4 (COM1, COM2, COM3 and PA)
Rated level 250 mVrms ±10 %
Impedance 150 Ohm nominal
Circuitry type direct throughline via relay
Keylines:
Quantity 4 (COM1, COM2, COM3 and PA)
Rated level <1 A
Circuitry type grounded relay contact
Audio Performance
As per RTCA DO-170 Product Classification 1a except where noted.
* Manufacturers Specification ** Exceeds DO-170 requirement
Rated Output Power (each stereo channel) 100 mW min. into 300 Ω
Audio freq. Response:
Receive ≤3dB down from 350 - 6000 Hz
Intercom ≤3dB down from 350 - 3000 Hz
ICS Tie ≤3dB down from 350 - 3000 Hz
Music ≤3dB down from 300 - 15000 Hz
(Music Bass control at mid setting)
Distortion ≤10%, ≤3 % typical (350 to 6000 Hz)
Input - Input crosstalk -37 dB max*
Input - Output crosstalk -55 dB max
Input - Mic crosstalk <200 µVrms*
Oct 13, 2005 Page 1-3
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.