Northern Airborne Technology PIA01-001 - Manual (Page 5)

PIA01-001 Passenger Intercom Amplifier
SM78 Installation and Operation Manual
Section 1 Rev: 1.00
Issue 1 Page 1-2
ENG-FORM: 800-0116.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Input Signals
Input Power
Normal Operating Conditions:
Nominal: +28.0 Vdc
Maximum: +30.3 Vdc
Minimum: +22.0 Vdc
Emergency: +18.0 Vdc
Abnormal Operating Conditions:
Maximum: +32.2 Vdc
Minimum: +20.5 Vdc
Input Current: 2.0 A maximum @ 28.0 Vdc
Microphones (PAX1 MIC through PAX6 MIC)
Three microphone impedances are available. All microphone inputs are configured to the same
impedance setting via the digital ICS Tieline (digital mode) or jumper settings (analog mode).
Quantity: 6
Gain Adjustable from -9 dB to +6 dB of nominal input level, +/- 1dB
with 15 steps of adjustment (digital mode only).
Microphone (Type One) dynamic
Rated Level:
250 µVrms nominal to produce rated headphone output
Impedance: 5 Ω ±30%
Circuitry Type: differential
Microphone (Type Two) dynamic
Rated Level: 850 µVrms nominal to produce rated headphone output
Impedance: 75 Ω ±30%
Circuitry Type: differential
Microphone (Type Three) amplified dynamic/electret
Rated Level: 250 mVrms nominal to produce rated headphone output
Impedance: 150 Ω ±10%
Circuitry Type: single ended
Mic Bias: 24 mA (TSO configuration)
Stereo Music (MUSIC R and MUSIC L)
Quantity: 1
Lo Level Input: 400 mVrms +/-10%
Hi Level Input: 2.5 Vrms +/-10%
Input Impedance: 1 k Ω ±10%
Circuitry Type: differential