Northern Airborne Technology 3110 - Manual (Page 17)

SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
Load Impedance: ≥8 Ω
Output Impedance: ≤4 Ω
Volume range: 39 ±5 dB
Rated power: 8 W into 8 Ω (8 ±1 Vrms)
Distortion: <2% nominal.
Cabin Call Tone Level: 3.8 ±1.2 Vpp
Keyline: (COM PTT, PA PTT, VHF BKUP PTT)
Level: Open ( ≥100 kΩ) (Inactive)
GND (<30 Ω) (Active)
Sink Current: <20 mA
Discrete Output: (EMER MODE OUT, AUX MUTE ANNUNC,
PA STEREO MUTE)
Level: 18.5 to 36 V (HI)
<3.5 V (LO)
Sink Current: <100 mA
Cockpit Voice Recorder: (CVR)
Type: Differential, AC coupled, transformerless, short
circuit protected
Impedance: <600 Ω
Load Impedance: 5000 Ω
Level: 40 mVrms to 3.0 Vrms
Output power: 1.8 mW into 5000 Ω (3.0 ±0.2 Vrms)
Distortion: <2% nominal.
EMER Mode: -20 ±3 dB relative to input
EMER Microphone: (VHF BKUP TX)
Type: Single ended, transformerless, passive bypass
through relay contacts.
Load Impedance: 150 Ω
Aug 25, 2005 Page 1-5
ENG-FORM: 800-0108.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.