Joel, it will be almost the same, but instead of seeing the “waves” of the peak/pass and dip/notch., you will only see the vertical “spike” of the generated signal. Just like if you hooked the generator directly to the S/A. you will only be able to adjust for max pass of the desired freq (tallest spike)and min pass (shortest spike)of the reject/notch freq.
Hook the s/a to the antenna port, a dummy to one side of the duplexer while generating into the side you are adjusting. Then switch sides. I used to have to do exactly this till I got a tracking gen s/a. --then I re-visited some of my work and it couldn’t be improved. Made me wonder why I spent the extra money on the new service monitor. hi 73 Don W5DK From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Joel Sent: Thursday, June 26, 2008 1:14 PM To: [email protected] Subject: Re: [Repeater-Builder] Help! Duplexer setup = with two service monitors and a spectrum analyzer Got you Don, thanks for responding. But I'm looking for something more specific as to, how one may hook up, the aforementioned equipment to do what the spectrum analyzer/with the TG does to obtain a set of duplexer tuned to a specific frequency. v44kai.....Joel. ----- Original Message ----- From: de W5DK <mailto:[EMAIL PROTECTED]> To: [email protected] Sent: Thursday, June 26, 2008 11:40 AM Subject: RE: [Repeater-Builder] Help! Duplexer setup = with two service monitors and a spectrum analyzer No, you will only see the peak and skirts of the generated signal, you need to terminate all the duplexer ports with 3db 50 ohm pads and tune for pass first, lock those down them tune the reject path Bottom of first link is a sketch. 73 Don W5DK http://www.repeater-builder.com/wacom/wp6xx-vhf-tuning-instructions.pdf http://www.repeater-builder.com/antenna/ant-sys-index.html#duplexers From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Joel Sent: Thursday, June 26, 2008 10:54 AM To: [email protected] Subject: [Repeater-Builder] Help! Duplexer setup = with two service monitors and a spectrum analyzer Can someone in the group give me a sketch diagram of the setup, for tuning a duplexer with the following equipment I have?. I have two (2) service monitors (Marconi 2955/A), and a spectrum analyzer (Avcom PSA-65A, no built-in tracking generator) Q...Will I be able to see the response graph of the duplexer, as when I use a spectrum analyzer with a built-in tracking generator? All comments will be appreciated, and set aside for the radio club here archive. v44kai.....Joel. _____ No virus found in this incoming message. Checked by AVG. Version: 8.0.101 / Virus Database: 270.4.1/1519 - Release Date: 6/25/2008 4:13 PM
