Here's one simple test. Have someone with an HT get into a noisy location, then disable your repeater transmitter while listening on the local speaker. If all of a sudden the HT becomes full quieting, you've got a desense problem.
Chuck WB2EDV ----- Original Message ----- From: "w9mwq" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, July 26, 2004 8:01 PM Subject: [Repeater-Builder] Receiver Sensitivity Testing Through Duplexer > I need a little advise here. I want to test my repeater's > sensitivity through the duplexer's while the transmitter is keyed > up, into my Cushman Service Monitor. What is the best method of > doing this? Do I need an isolator of some sort, or will the service > monitor handle both the incoming power and the outgoing signal > generator? It's a Cushman 6030 by the way. The repeater is working > excellent for the most part. The problem that I am having is on > weak signals, the audio is being chopped out, almost like the PL > deck is shutting down. On the bench, the receiver is at about .25 > microvolts sensitivity at 12 DB Sinad. Audio out of the transmitter > is about 4KHz wide, and clean at 100 watts. Any suggestions. > Handhelds are able to get in from about 4 miles away, mobiles have > no troubles at 30 miles away. The antenna is only up at 60' right > now, fed with 120' of 7/8" Andrews hardline. But it seems the > handhelds are the one's having the problems, and their signal is not > really that bad. Help please. > > Mathew > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
