Northern Airborne Technology DA80 - Manual (Page 5)

DA80 Series DigiVOX™ Digital Intercom Manual SM57 Rev. 4.10
A bi-color LED will show green for Transmit condition and amber for VOX operation.
High roll-off finite impulse response filters are used to shape the audio delivered to the
phones and radio microphone.
The following audio messages are embedded to provide information of system
operation.
DA80-001 DA80-010
• System Ready • System Ready
• Emergency Mode • Pilot Isolate
• Normal Mode • Normal Mode
• AutoVOX™ • AutoVOX™ Mode
• Stuck Mic. • Stuck Mic
1.4 Specifications
1.4.1 Electrical Specifications
Power Supply
Description:
Multiple switches and linear regulators with
reverse and over voltage protection. Short
circuit protected by internal fuse.
Normal operating conditions:
Nom. Operating Voltage: 27.5 Vdc / 13.8 Vdc
Max. Operating Voltage: 30.3 Vdc
Min. Operating Voltage: 11.0 Vdc
Input current 0.3 A max @ 27.5 Vdc
Input current 0.6 A max @ 13.8 Vdc
Input Signals
Quantity: 4 Microphone channels
1 Receive channel
2 Music channels (Left, Right)
2 Transmit key lines
1 Intercom key line (DA80-010 only)
Rated Level: 250 mVrms for microphone inputs
2.5 Vrms for receive input
500 mVrms for music inputs
Page 1-2 Oct 13, 2004
ENG-FORM: 800-0107.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.