I would do a frequency sweep with an MFJ-259 or similar to cover the
frequencies of interest. A noise bridge and a receiver would be another
approach.

A few specifics would aid in pointing you in the right direction.

"Don Baker" wrote in message
...
I would like to be able to determine if antenna is present at the end of a
piece of coax. In some case antennas of type ?? would have a DC
resistance
across the coax and that makes it easy. But..., how would you easily
determine if a coax shows an infinite DC resistance (NO RETURN PATH) no
current flow - like simple did-poke.

Trying to spare the group all the details of what I am doing but I will
gladly answer any questions. Thank you in advance for your help.

Don