How To Tune A Duplexer Without A Spectrum Analyzer. Also check with the manufacturer for specific tuning instruction

Also check with the manufacturer for specific tuning instructions. Yes you can tune a Typical Duplexer configuration using Pass-Reject cavity filters This application note focuses o. TUNING THE REJECT FREQUENCY I'm looking to see if there is any other way to tune a duplexer without a Spectrum Analyzer w/tracking generator? If so any help would be appreciated (equipment needed, how After cleaning this duplexer up and making a new cable harness for it, I wanted to tune it for repeater use on the 2 meter band. Set the radio to the TX frequency and connect to the duplexers antenna connector. I tried tuning one, then took ot to a local guy that I owned a commercial repeater business for many years and have personally tuned every kind of duplexer out there including 6 cavity flat pack mobile duplexers for GMRS, I tune Most ham repeaters had some procedures to do this without multi thousand dollar service monitors. He has decades of experience in commercial VHF/UHF radio communications. This will save you time Don't change the pass frequency tuning after tuning the reject. I recall some local hams making cavities from large diameter copper tubing Learn more Tuning the PD526 UHF Duplexer I have a friend, I'll call him Tuje (pronounced Tooge). The transmitter side is tuned to notch out the receiver frequency. Mike the engineer also gives suggestions on preventing damage to the unit I've tuned a lot of duplexers over the years. A TX/RX Systems Vari-Notch duplexer is used in this video. Notch Duplexer. The receiver side tuned to notch out the transmitt Loosen the 7/16" locking nut on the center tuning shaft, and tune the shaft of the cavity for maximum response as indicated on the analyzer. I always find that tuning duplexers just by looking at a tracking generator (or a VNA if you will) gets you in the ball park but is never quite close enough, no matter how sharp your This desktop unit consisting of transmitter, receiver and duplexer covered the portion of the spectrum in which the allocation of 2 meter is found, it should be possible to tune In this how to video, a Sinclair Technologies engineer demonstrates step by step how to properly tune a duplexer filter. I would tune them as well as possible using the VNWA sweep. Of course that is if you don't have a signal analyzer with generator to the equipment port of one of the duplexer channels and the spectrum analyzer input to the equipment port of the remaining channel as shown in figure 7. For entertainment purposes onlyThanks for watching Tune a Duplexer with a Spectrum Analyzer + Tracking Generator or VNA This video shows how to tune a notch-type duplexer using a spectrum analyzer with a tracking generator, as well as With the advent of modern communications service monitors, which include a spectrum analyzer/tracking generator, it is now possible to do swept measurements of duplexers with If you are unsure of the design of the duplexer, refer to the manufacturers information first before making ANY adjustments. The final step for tuning the notch was to replace Again, a spectrum analyzer with a tracking signal generator makes things easier, but you can definitely also do it with the basic setup. tuning a pass-reject Duplexer filter using the R8000 analyzer. 2GHz repeater duplexer using a NanoVNA V2plus4. Since we install duplexers in our repeaters and sell duplexers as part of our system packages, I often get asked about them. After tuning them my receive is awful and my 10+ years ago I was using my DG8SAQ VNWA to tune duplexors. Since I had taken tuning a pass-reject Duplexer filter using the R8000 analyzer. How I tune a mobile radio duplexer. Band Reject Duplexer. Tuning a set of Duplexers for our Ham Radio Repeater using the Rigol DSA815-TG spectrum analyzer. How do they work? What are they used for? And how are duplexers tuned? To answer these questions, Yesterday I was trying to tune up the duplexers one can at a time as listed in this Sinclair Youtube Video. Set a wattmeter to the RX port and a 50 ohm load to the TX port that can tolerate the power The Pass / Reject Duplexer can be tuned by using a return loss bridge to tune the Rx and Tx sections for maximum return loss at their pass Tuning a duplexer for a single pair gives the best performance with minimal insertion loss and better isolation from other frequencies/channels. Without a doubt a spectrum analyzer is the way to go however there is more than one way to skin a cat as they. The settings and measurement results illustrated are similar for other individual Duplexer filter ele ents or configurations that When I asked an amateur radio buddy how he tuned his repeater duplexer, he responded, "By signal strength. Also be sure you have "compensated" the "0" db I'd like to make a general suggestion to anyone on this group and the NANOVNA group: Dig just a "bit" and learn the differences between a Spectrum Analyzer and a Vector Network Analyzer. The settings and measurement Does anybody here know the step-by-step method of tuning a duplexer with a spectrum analyzer (without a tracking generator) and handheld radio(s)? Don't have tracking In this how to video, a Sinclair Technologies engineer demonstrates step by step how to properly tune a duplexer filter. Amature radio operators I bought one of these cheap, Chinese spectrum analyzers and I was pretty successful in tuning the flat pack duplexers. If the duplexer has not been tuned before for your frequency, you may want to tune each cavity first by disconnecting them, getting it close, and then tune them together. Date 1 - 19 of 19Tuning a Duplexer for SWR With the filter notch trace showing on the spectrum analyzer display, turn the duplexer's three High cavity tuning screws to move the three notch traces to the repeater Low frequency. Any method of being able to see the signal as you tune will help This video shows how to tune a 1. .

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