Northern Airborne Technology AA83-001 rev.4.00 - Manual (Page 10)

AA83-001 InterMUSIC™ Stereo Intercom System Manual SM09-2A Rev. 4.00
1.4
Specifications
1.4.1 Electrical Specifications
Input Power Linear regulator with over voltage protection
Operating Voltages:
Nominal 27.5 or 13.8 Vdc @ 550 mA max (one input for both)
Maximum 30.3 Vdc
Minimum 11.0 Vdc
Internal supply 11 Vdc
Input Signals
Microphone
Quantity 4 (Pilot, Co-pilot, 2 Passengers).
Rated level 250 mVrms nominal (125 to 500 mVrms)
Impedance 150 Ohm ±10 %
Circuitry type unbalanced
TX Keyline
Quantity 2 (Pilot, Co-pilot).
Rated level ground activates keyline, <20 mA source current
ICS Keyline
Quantity 4 (Pilot, Co-pilot, 2 Passengers).
Rated level ground activates keyline, <1 mA source current
Receive Audio
Quantity 1
Rated level 2.5 Vrms nominal (1.3 to 5.0 Vrms)
Impedance 1.2 kOhm ±20 %
Circuitry type unbalanced
Music Inputs
Quantity 2 (left channel, right channel)
Rated level 1.4 Vrms nominal (850 mVrms to 2.4 Vrms)
Impedance 12.5 kOhm ±10 %
Circuitry type unbalanced
Bidirectional Signals
ICS TIE Channel
Quantity 1
Rated level 340 mVrms nominal (170 to 680 mVrms)
Impedance 2 kOhm ±10 %
Circuitry type unbalanced
Page 1-2 Feb 8, 2006
ENG-FORM: 800-0108.DOT
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