DUAL G703 Detector
B044
Introduction
2004 dB Broadcast Ltd
2
Version 1.0
Main features
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Two independent detectors per module
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75R transformer coupled input and output (120R Bal. if req)
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Active loop through output/Input level detector with adjustable threshold
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Four alarm indications per channel
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All alarms are available on open collectors
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Any one of the four alarms is selectable to the summary alarm (Relay)
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Four alarms:
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Signal level indication
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Alarm insertion signal present (AIS) & TS16 AIS
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Loss of Framing or Multi Framing
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CRC 4 quality threshold alarm
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Threshold adjustable ± 6dB, alarm will turn on with loss of signal
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Alarm will turn on when three consecutive incorrect frame alignment signals have been
received
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CRC4 errors are counted internally and update a 10 bit counter every second, with the
alarm being set if the count exceeds a pre- determined level
