Northern Airborne Technology AA20-431 - Manual (Page 7)

AA20-431 Cabin PA System Manual SM22 Rev. 4.10
1.4 Specifications
1.4.1 Electrical Specifications
Input Power: 22 to 30 Vdc, 280 mA idle (2 A max.)
Lamp Power: +28 Vdc, 80 mA
Inputs:
Music: Two tape inputs, left & right channel mixed
internally
Tape audio levels: 1.0 Vrms @ 1 kHz (Input impedance 8.6 k Ω)
CD audio levels: 400 mVrms @ 1 kHz (Input impedance 10 k Ω)
(Note: remove internal jumpers for CD input)
Microphones:
High impedance 150 Ω amplified dynamic. ALC
starts at 70 mVrms. Impedance is 125 Ω ±10%.
PA Key: Active low. Current source 15 mA max. (chime
will activate only once)
Seat Belt & Active low. Current source 15 mA max.
No Smoking Key: Trigger Voltage 2 Vdc max. (chime will activate
twice, once on keying and again on un-keying)
Message Key: Active high. Current sink 15 mA max. Trigger
voltage 28 Vdc max. (chime will activate twice,
once on keying and again on un-keying)
+3 dB Key: Active open. Current source 1 mA max.
(headset & speaker audio levels will decrease
by 3 dB when grounded)
Outputs:
Headset: Eight outputs – 80 mW max each into 600 Ω @ 10%
THD
Short circuit protected.
Audio Bandwidth: Mic channel – <3 dB, 350 Hz to 3 kHz
Music channel – <3 dB, 150 Hz to 9 kHz
Signal to noise ratio – 65 dB
Sidetone: Adjustable 0 – 100 mW into 600 Ω @ 10% THD.
Audio bandwidth: <3 dB, 350 Hz to 3 kHz
Signal to noise ratio – 65 dB
Page 1-2 Apr 21, 2004
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.