Northern Airborne Technology AMU50-001 User Manual
Page 9
AMU50-001 Audio Management Unit
SM76 Installation and Operation Manual
Section 1 Rev: 1.03
Issue 1
Page 1-6
ENG-FORM: 800-0116.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Headphone (Type One)
Load Impedance: 8
Ω ±10%
Output Impedance: ≤2.25
Ω
Headphone (Type Two)
Load Impedance: 150
Ω ±10%
Output Impedance: ≤20
Ω
Headphone (Type Three)
Load Impedance: 600
Ω ±10%
Output Impedance: ≤60
Ω
Transceiver Microphone Outputs
Quantity: Eight
Output Impedance:
≤60
Ω
Circuitry Type:
Balanced and AC coupled
Rated Output:
250 mVrms into 50
Ω ±10%
Output Range:
11 mVrms to 1.1 Vrms, ≥160 steps, logarithmic
Composite Audio Output
Quantity: One
Output Impedance:
≤150 Ω
Rated Output:
2.5 Vrms or 500 mVrms into 600 ohms
±10%
Circuitry Type:
Balanced
Cockpit Voice Recorder Outputs (User 1 CVR and User 2 CVR)
User 1 CVR is User 1 summed MIC and headphone audio, and User 2 CVR is User 2 summed
MIC and headphone audio.
Quantity: Two
Load Impedance:
5 k
Ω ±10%
Output Impedance:
≤600
Ω across rated frequency range
Rated Output:
500 mVrms into rated load in normal mode
±10%
500 mVrms into rated load in emergency mode +50%/-30%
Output Level:
Configurable through DevCs application, providing 40
±2 dB of control
Output Range:
Normal Mode:
9 mVrms to 900 mVrms, ≥64 steps
Emergency Mode: 10 mVrms to 900 mVrms, 65 steps
Circuitry Type:
Balanced