thanks very muchfor the information i do have a spectrum analyzer hp8558b and a wavetec 3000 servicemonitor thanks ian ----- Original Message ----- From: "Eric Lemmon" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, November 28, 2003 1:25 PM Subject: Re: [Repeater-Builder] Tuning cavity filters
> Ian, > > Of the two methods you propose, the first is better by a long shot. It > is never a good idea to transmit into an untuned duplexer, for any > purpose. > > If you don't have access to proper duplexer tuning equipment, such as a > network analyzer or a spectrum analyzer with tracking generator, the > "receiver s-meter" method is crude but will get you close. The down > side is that this method lacks the great sensitivity and precision > attainable with a network analyzer- the instrument of choice with > duplexer manufacturers. > > Perhaps the best advice I can offer is to contact the manufacturer of > your duplexer, and ask for a copy of the field tuning instructions. > There is no "single standard procedure" for tuning duplexers, so it > helps to know what method is recommended by the firm that built it. > > 73, Eric Lemmon WB6FLY > > Ian Wells wrote: > ...When tuning cavity filters, which is the best way of alignment- > having a signal generator hooked up to the tin with a radio with signal > strength meter on the other side, or transmitting on the radio with an > swr meter in line with tin into a dummy load?... > > > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
