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NTSC signal detection

T

The Marauder

Jan 1, 1970
0
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?
 
J

Jim Thompson

Jan 1, 1970
0
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?

How about an LM1881 sync separator plus a comparator?

...Jim Thompson
 
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