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Copyright: 1996 - 2024

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

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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

Posted  11/12/2012

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