Northern Airborne Technology AA83-001 rev.4.00 - Manual (Page 11)

SM09-2A Rev. 4.00 AA83-001 InterMUSIC™ Stereo Intercom System Manual
Output Signals
Phones
Quantity 4 (Pilot, Co-pilot, 2 Passengers)
Rated level >5.5 Vrms (>100 mW, RX and ICS and music)
Impedance 300 Ohm ±10 %
Circuitry type transformer, unbalanced
Radio TX Mic
Quantity 1
Rated level 250 mVrms ±10 %
Impedance 150 Ohm nominal
Circuitry type direct throughline via relay
Radio TX Keyline
Quantity 1
Rated
level <1 A
Circuitry type grounded relay contact
Audio Performance
Per RTCA DO-170 except where noted. Product Classification: 1a
Rated Output Power 100 mW min. into 300 Ω (each stereo channel)
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 -50 dB max*
Input - Output crosstalk -55 dB max.
Input - Mic crosstalk <1.0 mVrms*
Audio noise -50 dB max
Output Regulation ≤3 dB variance (350 to 6000 Hz)
Audio Communication Loud & Clear
ICS Volume control ≥35 dB*, 40 dB nominal
Music Volume control ≥35 dB*, 40 dB nominal
Amplifiers with Compression N/A
Stability and Short Circuit Protection
No spurious or sustained oscillations.
Receive Input impedance 1.2 k Ω ±20%
Mic Input impedance 150 Ω ±10%
Music Input impedance 12.5 k Ω ±10 %
Tie Line 2 k Ω ±10 %
Note: * Denotes manufacturer's specification
Feb 8, 2006 Page 1-3
ENG-FORM: 800-0108.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.