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Below are all of the forum threads, including all the responses to the original posts. mark_gidney Post subject: directional detector? Unread postPosted: Thu Jan 27, 2005 6:11 pm Hi There, I bought two directional detectors at a swap shop, but I can't seem to get them to work. Their frequency ranges are from 400MHz to 1GHz and when I put 500MHz into them at 30dBm I can't measure anything out of the detector port. The in-line port has N-connectors and the detector port has RCA connectors like you get on your stereo. I'd really like to use these, but I can't measure anything out of the RCA connector port. I used a dc voltmeter and I used a scope on 5mV/div. I hope this isn't a stupid question? Do I somehow have to bias the RCA port? Thanks a lot. Sincerely, Mark Gidney, Nova Scotia, Canada Top Rod Post subject: Unread postPosted: Sat Jan 29, 2005 3:53 am Directional detectors use diodes. I hope 30dBm wasn't too much. :smt025 Top billclub Post subject: Unread postPosted: Wed Apr 20, 2005 9:51 am Offline Lieutenant Joined: Sat Apr 02, 2005 2:16 pm Posts: 2 Location: NJ Sometimes detectors lack an internal DC termination which is required. Try adding a 3 dB coax pad between the detector and voltmeter, (or otherwise provide a dc termination). good luck. Bill Top Profile Guest Post subject: Unread postPosted: Wed Apr 20, 2005 11:58 am I agree with Rod, 30dBm may have blown the diodes or the diodes were already blown when you bought the detector. Posted 11/12/2012 | ||||||
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