Skipp,
Please explain your first statement. if I can't see it on the spectrum analyzer, then what is it? No circulator/isolator in line during test. VSWR is indetectable between the TX and the cans. If I lower the power enough, the desense goes away. just as I'd expect. It's a matter of scale, after all. By the way. the symptoms are both the same with 2 separate repeaters (I amended my first post to say that), so unless they both have the same problems, the issue is not the with TX. Mike From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Tuesday, October 07, 2008 12:27 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Desense has me pulling my hair out! (Was DB4060 Duplexer Cables > Not sure what you're asking, but if you're asking about > spurs, she's a clean as a whistle. VSWR is fine as well. ... as determined by what? Just because you can't see it with your service monitor doesn't mean a problem isn't there. Something different to try Take a different radio/transmitter... maybe a lower power level to start this test... place it on the repeater tx frequency into the duplexer tx path. Be sure to terminate or disable the original repeater transmitter. Monitor the receiver, key the alternate transmitter into the duplexer tx port. Got Milk? Got desense? I never did see if you stated to have a circulator/isolator in line? **** Another trick is to try both reducing tx power to near nothing while observing the desense and to also try inserting a high power 10 dB attenuator in the tx path to see what happens at full and reduced power. Moving along... we'll wait to see what you report back. cheers, s.
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