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NTSC signal detection

Discussion in 'Electronic Design' started by The Marauder, Sep 15, 2003.

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  1. The Marauder

    The Marauder Guest

    All, we have a camera that we are using for law enforcement applications
    that we would like to replace with a wireless camera. Here is our problem.
    The camera is activated by motion detectors, and out recording device auto
    records when it receives a signal. However, this new wireless camera we just
    purchased causes a problem in this setup. When the camera is not turned on,
    the receiver just transmits static to the recorder, which interprets this as
    a signal, so we end up with hours and hours of static recoreded, not too
    entertaining to watch. Is there some device already to market that we could
    install inbetween the wireless receiver and the recording device that would
    shut off the connection if only static is being recieved? If not, anyone
    have any idea on how tio design one?
  2. Jim Thompson

    Jim Thompson Guest

    How about an LM1881 sync separator plus a comparator?

    ...Jim Thompson
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