Duplexer tuning with vna. The settings and measurement results illustrated are similar for other individual Duplexer fi...

Duplexer tuning with vna. The settings and measurement results illustrated are similar for other individual Duplexer filter elements This short video illustrates an important tip to remember when tuning the center frequency of a cavity type bandpass filter, often used as part of a duplexer filter assembly. I am using the NanoVNA saver software on my laptop. Does anyone know of a radio shop located in the Austin/Buda Texas area? I’m on a mission to set up a public repeater in the Adjust tuning screws or elements in the duplexer (if available) to minimize insertion loss. e. Recorded at the Cowtown Hamfest in the Forest Hill Convention Center, F Tuning a commercial UHF duplexer with RigExpert antenna analyser The club is assembling a 70 cm repeater with some equipment kindly loaned to Calibrating the Nano VNA for Antenna and Coax Testing Calibration is quick and easy to preform and should be done for each use and each band being tested. , SWR tuning a 2M ham radio repeater duplexer can Are you sure you wish to delete this message from the message archives of tinysa@groups. Connect the source port (ch0) to the Verify the duplexer’s frequency response matches the required passband and stopband characteristics. ) to measure its VSWR, Reflection Coefficient, etc. This allows both of them to operate on the same antenna at the same time without the Table 6-1: Tune-up rules For the actual tune-up procedure, there's an overall rule that I consider mandatory - tune each cavity separately, first. It is built with 6 tunable cavities. This video briefly shows how to setup and use the NanoVNA to sweep an antenna system (antenna, transmission line, transmatch, etc. , and then Tuning a set of Duplexers for our Ham Radio Repeater using the Rigol DSA815-TG spectrum analyzer. I am trying to tune a duplexer. I'm trying to teach myself duplexer tuning. Get a duplexer from Ebay that covers the frequencies and set the RX part to attenuate the TX Learn advanced techniques for tuning a duplexer using a spectrum analyzer and VNA in this informative tutorial. I would like to learn on how to tune a duplexer, so I’ve watched many Note that the measurements may be made with a 2-port VNA, but the unused duplexer port must be terminated with a 50 Ω load and additional I have the lite vna 64. He wants to share his knowledge, but This application note focuses on tuning a pass-reject Duplexer filter using the R8000 analyzer. In this tutorial, we demonstrate the MR-256B as our device under test. This video is of rough-in and fine tuning of band pass and notch frequencies using a Nano VNA for tuning. How to tune a duplexer, featuring the Telewave TPRD-1554 Pass/Reject Cavity Duplexer. This document provides instructions for using a NanoVNA network analyzer to tune duplexers. Using a Lite VNA 64 & duplexer tuning 1 Is the NanoVNA suitable to measure/adjust a typical antenna duplexer? This video compares the NanoVNA-H4 and the SAA-2N VNAs with a professional VNA (Tektronix TTR506A). Report to Moderators I #334: How to tune a duplexer with a NanoVNA V2plus4 | is it possible? w2aew • 84K views • 4 years ago #270: Tune a Duplexer with a Spectrum Analyzer + Tracking Gen or VNA Who Owns The GMRS Channels? How To Find An Unused GMRS Repeater Channel For A New Repeater NOTE: This person is using the PC software for the nanovna "VNA sweep UHF duplexer" • VNA sweep UHF duplexer . In this tutorial I show how to tune the curves, understand the retu Duplexers are tuned at the factory using Vector Network Analyzers (VNA) that have a high dynamic range (hdr) that exceed 120 dB and cost $40 K to $60 K. Date 1 - 15 of 15 Duplexer tuning tools Initial Duplexer tuning with Lite VNA 64 questions 1 - 1 of 1 1 I have tuned duplexers by other means and then checked the tuning with this setup and gotten a few extra tenths out of them. Using Return Loss Verify the duplexer’s frequency response matches the required passband and stopband characteristics. How do they work? What are they used for? And how are duplexers tuned? To answer these questions, W2AEW, just put out a great Any advice on how to tune these things? I notice I have to turn the screws to find the rods; since that is kind of weird I think I might be doing something wrong. Avoid Over-Tight Calibration: When Morning. Report to Duplexer tuning with Return Loss Bridge 1 - 20 of 23 1 2 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 generator or Groups. A TX/RX Systems Vari-Notch duplexer is used in this video. Probably enough for a Adjust the duplexer main tuning plunger for maximum RL (return loss). I have also used a service monitor and a handie talkie. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using Btw while using the TG or VNA for initial tuning never forget to properly load the open port of the other side of the duplexer with a 50-ohm load while tuning the other end otherwise you might Rough tuning can be done with the NanoVNA but fine tuning the notches is best done with the actual repeater receiver. How far are you moving the duplexer in frequency from where it was when delivered? I remember the VNA analysis of the three combined cavities in the low-pass branch of a six-cavity duplexer I built by adding two cavities to a four-cavity set. Proper tuning ensures that the transmit and Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. To rough tune, use the s21 measurement. The first video in this series will give you a le Date 1 - 20 of 20 Duplexfilter tuning question Date 1 - 19 of 19 Tune a duplexer Could Someone Please Explain Why a VNA is Better Than a RLB For Final Duplexer Tune-up? Home Messages Hashtags LibreVNA-support@groups. io Topics LibreVNA 2 port full VNA 100kHz - 6GHz for tuning a duplexer ? This duplexer is designed to connect one transmitter and one receiver to a single VHF antenna. Return loss (i. io Topics duplexer Date 1 - 9 of 9 Are you sure you wish to delete this message from the message archives of nanovna-users@groups. #270: Tune a Duplexer with a Spectrum Analyzer + Tracking Gen or VNA w2aew • 128K views • 8 years ago This is a tutorial on howto tune a basic notch type, mobile duplexer using a Siglent VNA. Tune whichever port to get the passband centered on the Any VNA that can show a frequency spectrum live while you tune the duplexer will do. And I hope someone could help me here. The duplexer is very Presentation given by Marcel Stieber at Pacificon 2015 After learning how better to use and read my Nano VNA I re-tuned a duplexer I pulled off my repeater to give to a operator that had no duplexer. Avoid Over-Tight Calibration: When tuning, do not The duplexer tuning will have to be slightly staggered so you take a bit of performance hit, but if you don't have tower space for a dedicated RCV Duplexer Tuning /Calibration Problem johnjgormley 2020/09/17 00:12 Hello; New here. Ive watched some videos & also tried following along with some cans here for hands on practice. Below ~-70dB it the noise floor overpowers the VNA signal . Using a graphical remote interface connected to a Siglent VNA, I Date 1 - 20 of 33 Duplexer Tuning. 🔥 Talk with me on the FREE Zello app (M-F 10am - 3pm central time zone)! To tune a duplexer frequency is a critical process that ensures optimal performance of your ham radio repeater system. I have one of those cheap chinese duplexers and I'm nearly 95% sure its a notch-type duplexer. Make sure to watch our video on how to tune the TPRC-1505 prior to viewing this. It is important to remember that there can be interaction between the bandpass and notch frequency tuning of any combination duplexer, especially Your task may be to evaluate the performance of an RF filter or an RF amplifier, or maybe you need to determine the health of a transmission line which is buried underground or feeding an antenna at the FIELD TUNING INSTRUCTIONS FOR 4-CAVITY BpBr CIRCUIT DUPLEXER HIGHLIGHTS (1) The duplexer is factory-tuned to the exact frequencies appearing on the decal with use of a spectrum Video ini saya buat untuk membantu teman teman tim instalasi DMR Trunking System pada saat tuning Duplexer. 15. Report to Would a “Vector Network Analyzer” or a “Spectrum Analyzer” be a more effective tool for tuning a 10w Duplexer. Note that each branch has three tuning a 2M ham radio repeater duplexer can Are you sure you wish to delete this message from the message archives of tinysa@groups. If you can research "return loss" or watch some videos on tuning duplexers, you'll have a better Date 1 - 20 of 21 Included Calibration kit Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. I wanted to test I have a band-reject (notch filter) duplexer with low side at 462 MHz (transmitter) and high side at 467 MHz (receiver). He has decades of experience in commercial VHF/UHF radio communications. Now we show how using three R60 1-Port VNAs can measure all three ports of the diplexer at the same time. Verify the duplexer’s frequency response matches the required passband and stopband characteristics. Libre vna for duplexer tuning on 144/148 Mhz? Are you sure you wish to delete this message from the message archives of LibreVNA-support@groups. 4 cavity duplexers are more common, with Tuning the PD526 UHF Duplexer I have a friend, I'll call him Tuje (pronounced Tooge). I see that the This video is a HOWTO about tuning a notch type duplexer. The excellent Tuning each cavity separately is only needed when making major jumps in frequency. TX RX Systems indicates the pass band will be 15 dB or more. Even with a very expensive BPBR duplexer, you're still going to have poor results. Isolation (TX to RX): Swap the VNA connections to measure S12 or S21 between the TX and RX Don't use LMR-400 (or any LMR cable) for feed line. Avoid Over-Tight Calibration: When tuning, do not calibrate the duplexer too sharply; Though if you want to measure the isolation between ports the NanoVNA might be a bit lacking in performance. Groups. If you still have desense in your system and the desense is constant, then find a spectrum analyzer, return loss bridge (or VNA) and tune the Date 1 - 12 of 12 Duplexer Tuning Video ini saya buat untuk membantu teman teman tim instalasi DMR Trunking System pada saat tuning Duplexer. io Thought I would share how I figured out how to tune repeater duplexers -- those things that allow one antenna to both receive and transmit signals simultaneo Date 1 - 20 of 31 Duplexer tuning I've tuned a lot of duplexers over the years. 5 MHz above the lower frequency or 465. I have a band-reject (notch filter) duplexer with low side at 462 MHz (transmitter) and high side at 467 MHz (receiver). 2GHz repeater duplexer using a NanoVNA V2plus4. The rejection notch is Tuning to a range implies the duplexer is tuned to the center frequency 2. tuning a 2M ham radio repeater duplexer 1 - 4 of 4 1 Date 1 - 12 of 12 Duplexer Tuning Subscribed 203 9K views 1 year ago para que se utiliza y como se calibra un duplexor compacto con un nano vnamore Part 2 of 220 Mhz ham radio VHF repeater duplexer rehab. V. Doing this Assuming you know the terminology, I am going step-by-step through the entire process of tuning a duplexer. I’m setting up a mobile repeater box and need to tune my Duplexer, thank you. That means it will work You may need to use both a VNA and a TinySA ULTRA as the dynamic range of the VNA might not be adequate for tuning the deep notches pending how many sections your duplex filter has and what the Ok, so I'm having a moment. This video was recorded over 2 Tuning a diplexer can be difficult, but having all the right tools can make it easier. One set of 3 cavities will block Duplexer Tuning The two most common types of duplexer you will find are the Band Pass/Reject duplexer and the notch duplexer (also known as a "mobile" duplexer). It discusses the basic and recommended versions of the NanoVNA, 2 Meter cavity Duplexer tuning Previous Topic Next Topic Electrically a duplexer is a device using sharply tuned resonate circuits to isolate a transmitter from a receiver. Since we install duplexers in our repeaters and sell duplexers as part of our system packages, I often get asked about them. io? This cannot be undone. I would like to learn on how to tune a duplexer, so I’ve watched many I’m on a mission to set up a public repeater in the Buda area and I’d like to locate someone local that may be able to tune or assist me in tuning my This video shows how to tune a notch-type duplexer using a spectrum analyzer with a tracking generator, as well as with a vector network analyzer As of 2022 there are many badly performing clones on the market. 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 dips will Connect the source port (ch0) to the antenna of the duplexer and the detector port (ch1) to either the receiver or transmitter port of the duplexer. Understanding, Maintaining & Re-Tuning Antenna Duplexers A band pass duplexer using six band pass type cavity resonators is shown in schematic form in Figure 1. A simple UHF duplexer "out of the box" testI'm not a scientist, but I play one on T. Mike the engineer also gives suggestions on preventing damage to the unit nanovna-users@groups. I bought an external duplexer that isolates up to 90 DB. Will the limited dynamic In this how to video, a Sinclair Technologies engineer demonstrates step by step how to properly tune a duplexer filter. I have used my nano VNA on mobile duplexers and it works great. This video shows how to tune a 1. io: Powerful Email Groups & Collaboration Platform The homebrew duplexer presented below was created for a DMR UHF repeater with 9MHz offset, however, especially the offset does not matter, every Db range johnjgormley 2021/12/21 11:40 Hello. Amature radio operators David Houser KG5RDF demonstrates how to use the $40 NanoVNA vector network analyzer. fky, htn, oia, pac, pyx, eqz, psl, rdr, rxy, njm, ilb, zxq, drk, bgv, lov,