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The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


longclough
 Post subject: RF Cable measuring
Posted: Fri Jan 06, 2006 9:52 am 
 
Lieutenant

Joined: Fri Jan 06, 2006 9:44 am
Posts: 3
At work I have been taked with investigating the use of a system that indicates that the RF cable connected to our antenna is transmitting.

Someone mentioned a method similar to clampmeter. It purpose is to run a light that indicates it is operation. I am by no means an expert in this area, so any help would be appreciated.

Thanks in advance


 
   
 
tomw
 Post subject: Re: RF Cable measuring
Posted: Fri Jan 06, 2006 2:37 pm 
 
Lieutenant

Joined: Fri Dec 16, 2005 1:12 pm
Posts: 3
Location: San Antonio, TX
longclough wrote:
At work I have been taked with investigating the use of a system that indicates that the RF cable connected to our antenna is transmitting.

Someone mentioned a method similar to clampmeter. It purpose is to run a light that indicates it is operation. I am by no means an expert in this area, so any help would be appreciated.

Thanks in advance


Something like this may be possible depending on how good the cable shield attenuation is. If it's a solid shield coaxial cable the attenuation may be so high that it would not be possible to detect transmitter power through the shield. Then again, the transmitting antenna and other leakage may provide enough signal. Key issues are: the transmitter power level, frequency, and moduation type.

Tomw


 
   
 
longclough
 Post subject:
Posted: Sat Jan 07, 2006 2:22 pm 
 
Lieutenant

Joined: Fri Jan 06, 2006 9:44 am
Posts: 3
Thanks for that, would need to look into that a little bit more, need to work out what to do with the signal once I get it out in order to utilise it






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