Re: CCTV signal detector

Rune Allnor wrote:
Hi folks.

Is there such a thing as a CCTV Signal Detector available somewhere?
The thing I have in mind would be placed in various spots in a CCTV
system in order to detect if a valid TV signal comes through to each
of the sensors. Basically, this device would detect and help locate
breaches in the transmission lines in the CCTV system.

Are such gadgets available?

It must be clear to you that a monitor will do what you want, so I guess you want something automatic. The CCTV signal has strong horizontal- and vertical-frequency components. The vertical is close to the line frequency and weaker, so the horizontal component is easier to detect. Although signal quality is not addressed, a detector at the horizontal frequency should provide a reasonable indication of the presence of signal.
What kind of indication do you want? The detector itself could be an op-amp package and a few R's and C's.

Jerry
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Engineering is the art of making what you want from things you can get.
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