The
analogue backup unit, ABU, has been designed for purpose of monitoring and
automatically backing up analogue audio circuits via ISDN. The system is
comprised of a ABU slave unit installed at the audio source and a ABU master
unit installed at the transmitter site. The ABU master will continuously
monitor both the left and right audio channels and implement a backup scheme
determined by the type of fault detected. In the event of a total failure at
the signal source the ABU master can automatically switch to a locally
generated program source.
Key Features
One
Integral ISDN Terminal Adapter (64Kbps / 56Kbps) 12 International ISDN Standards - User
Selectable from Front Panel Real-time Applications - 2.8ms Coding Delay 15.5KHz Mono or 7.5KHz Mono Audio Over
ISDN (128Kbps - 2B Channels) > 82dB Signal-to-Noise Ratio Remote Configuration via Management
Ports Keypad &
Crystal Clear VFD Display 85-260V AC Auto-ranging Power Supply
Sub
Band ADPCM 2.8ms at 15.6KHz 16KHz to 32KHz 5Hz to 15.6KHz
@Fs=32KHz Mono (auto monoised) >80dB >10K +12dBu Max XLR
Balanced <100R +12dBu Max XLR Balanced >10K +12dBu
Max XLR Balanced
Type Connector Contact Closure: Aux Feed In
Use Contact
Closure: Left Channel Good Contact Closure: Left Channel Good Contact Closure: Main Feed in
Use Contact
Closure: ISDN Feed in Use Contact Closure: System in Auto Override Signal: Force to
ISDN Override
Signal: Force to Main Override Signal: Force to Aux
COM, NC, NO 25 Way D-Type
Female
ABU Slave Telemetry Port
Type Connector Contact Closure: ISDN Feed In Use Contact Closure: Audio
Good
COM, NC, NO 25 Way D-Type
Female
CD Start Port *
Type Connector Contact Closure: Start Aux CD
COM, NC, NO 9 Way D-Type Female
Power Requirements
Voltage Power Connection
85-260
VAC 60/50Hz Auto Ranging 20W IEC Mains Plug
