AVD-3120
VA-700
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Page 14 of 23
Revision 10
VIDEO SYNC FAILURE DETECTOR SUB-MODULE
(NOTE: Obsolete – No Longer Available. Information for existing modules only)
GENERAL DESCRIPTION
The AVD-3120 video detector is designed to be used to indicate the presence of a video signal by detecting the
vertical sync component of a composite video signal. The detection circuitry used ensures that noise alone will not
trigger the detector.
The AVD-3120 video sync failure detector sub-module may be fitted to the VA-700 Eurocard video distribution
amplifier for indicating loss of incoming video signals to the VDA. An LED is fitted to the sub-module, which extends
through the front panel of the VA-700 and a relay closure alarm output is available on the VA-700 rear connection
assembly at the three pin remote connector.
The AVD-3120 has an internal threshold adjustment, which is factory set to cover the majority of applications, but
is accessible to the user for special applications.
Note that all references to the VA-700 are also applicable to the VA-700T except where noted to the contrary.
Standard features:
•
Front panel LED failure indication.
•
Changeover relay alarm contacts.
•
Adjustable threshold.
Equipment provided:
Standard:
AVD-3120 Delay or filter amplifier sub-module.
3 pin IDC connector for remote alarm.