Northern Airborne Technology AMU50-001 - Manual (Page 7)

AMU50-001 Audio Management Unit
SM76 Installation and Operation Manual
Section 1 Rev: 1.03
Issue 1 Page 1-4
ENG-FORM: 800-0116.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Microphone (Type One) dynamic
Input Impedance 5 Ω ±30%
Rated Input 250 µVrms nominal to produce rated headphones output
Circuitry Type Differential
Microphone (Type Two) dynamic
Input Impedance 75 Ω ±30%
Rated Input 850 µVrms nominal to produce rated headphones output
Circuitry Type Differential
Microphone (Type Three) amplified dynamic/electret
Input Impedance 150 Ω ±10%
Rated Input 250 mVrms nominal to produce rated headphones output
Circuitry Type Single ended
Direct Audio Inputs (DIR 1 RX thru DIR 6 RX)
Quantity: Six
Input Impedance:
1000 Ω ±10%
Rated Input: 1 to 19.95 Vrms maximum to produce rated headphones output
Circuitry Type: Differential
Receive Audio Inputs
Quantity: Sixteen (8 transceivers and 8 receivers)
Input Impedance: 1000 Ω ±10%
Rated Input: 1 to 19.95 Vrms maximum to produce rated headphones output
Circuitry Type: Differential
Music Inputs (MUSIC RIGHT/LEFT RX)
Quantity: Two (one left, one right, summed to produce mono)
Input Impedance: 1000 Ω ±10%
Circuitry Type: Differential
Input Range 1: 400 mVrms nominal
Input Range 2: 2.5 Vrms nominal
Discrete Inputs
All discrete inputs have the following specifications unless stated otherwise.
Logic Active LO, switched ground, no external pull up required
Input Active ≤ +3 Vdc
Maximum Current ≤10 mA
Input Protection Diode protected to +45 Vdc maximum
Transmit Push-To-Talk (USER 1 TX KEY thru USER 7 TX KEY)
Quantity: Seven
ICS Push-To-Talk Inputs (USER 1 ICS KEY thru USER 7 ICS KEY)
Quantity: Seven