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Is it possible to test the impedance of a BNC cable?


I have just purchased a used 25 foot RGBS cable and I'm not sure if it is a 'true' 75 OHM video cable.


The only identification on the cable is - 4 CBS 13 - does this mean anything?


Also, the BNC connectors appear to be 50 OHM as the dielectric extends out to the end of the cage.

Is it possible to get this on a 75 OHM connector?


Thanks in advance

Brian
 

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yes use a TDR (Time Domain Reflection I think)

it will show the impedance down a cable and the connections


it is a very useful tool if you work with video or and hi speed circuits.
 
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