Northern Airborne Technology DA80 User Manual

Page 6

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:

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.