SM57 Rev. 4.10
DA80 Series DigiVOX™ Digital Intercom Manual
DA80-001 only
Transmit PTT<10 mA input current, active low
(3 Vdc max.)
DA80-010 only
Transmit Key <15 mA input current, active low
(3 Vdc max)
ICS Key <15 mA input current, active low (3 Vdc
max)
Impedance:
1
k
Ω
±
10% for receive and music inputs
150
Ω
±
10% for mic inputs
Circuitry Type:
All inputs are single ended
Coupling:
<-60dB input-to-input crosstalk
Output Signals
Quantity:
4 Phone outputs
1 Transmitter mic output
1 Transmitter keyline output
Rated
Level:
Phones output:
100mW (7.7 Vrms) into 600
Ω
TX mic output:
250 mV rms nominal into 150
Ω
Circuitry Type:
All outputs are single ended
Freq.
Resp.:
Phones
output:
Receive input
<3 dB from 350 Hz to 6000 Hz
Music input
<3 dB from 350 Hz to 6000 Hz
Intercom input <3 dB from 350 Hz to 6000 Hz
TX mic output
<3 dB from 350 Hz to 6000 Hz
Distortion:
<1% THD @ rated power output
Audio Noise Level:
Without Signal: >70 dB down from rated output
Coupling:
<-60 dB input-to-output crosstalk
Output regulation:
<1% THD / 3dB max. of rated output power
At 400% and 75% of rated load
Oct 13, 2004
Page 1-3
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
