Hi you beat me to it, I would suggest a duplexer problem as -55dB isn't a lot you should have ideally better than 80dB. It also could be the fact that you are running too much tx pwr, have you tried dropping it down.
73 Steve, M1SWB(UK) ----- Original Message ----- From: "Tim" <tahr...@swtexas.net> To: <Repeater-Builder@yahoogroups.com> Sent: Sunday, July 25, 2010 9:24 PM Subject: [Repeater-Builder] Re: Repeater receiver testing > Hi Nj902, > > Well, I'm not trying to be exacting in the measurement, I'm just trying to > track down a desense issue in the system. I figured I'd look at how > the receiver does with the adjacent (transmitter) signal injected directly > into the rx input port. > > The spectrum analyzer hooked up to the RX port on the duplexer shows > -55dBm, which should be down sufficiently enough not to be heard by the > receiver. > > I'm running the duplexer into a dummy load, and all interconnecting > cables are > double shielded. > > However, the desense is so severe that I am beginning to think there may > be something wrong in the RX. Hence, the question. > > Just trying to find that silver bullet. Got any spares? > > Thanks, > > Tim > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
