Duplexer tuning with vna. Isolation (TX to RX): Swap the VNA connections to measure S12 or S21 between the TX and RX ports. It also discusses the basics of what a duplexer is and a quick review of the most popular types. Date 1 - 12 of 12 Duplexer Tuning Jan 12, 2025 · Adjust tuning screws or elements in the duplexer (if available) to minimize insertion loss. Even two channel hybrid combiners are salty used. 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 display. I'v always had good luck Video: Basics of tuning a duplexer with a spectrum analyzer + tracking gen, and with VNA Archived post. Repeat for RX Path: Connect the RX port to Port 1 and the antenna port to Port 2. Get a duplexer from Ebay that covers the frequencies and set the RX part to attenuate the TX frequency and the TX part to attenuate the RX, and at the same time with as little loss as possible for its own frequency. It also discusses the basics of what a Jan 2, 2024 · Learn advanced techniques for tuning a duplexer using a spectrum analyzer and VNA in this informative tutorial. com. io Topics duplexer Date 1 - 9 of 9 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). Adjust the tuning to maximize isolation. The down side is the cost of a combiner. Will the limited dynamic Feb 19, 2024 · 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 antenna and a rcv multicoupler with a pre-selector, it could work. Overall it took about 8 days to and from at a $60 buck fee. Dec 13, 2024 · I tried to tune one myself using a Nano VNA and watching on line videos. New comments cannot be posted and votes cannot be cast. This video shows how to tune a 1. Tune whichever port to get the passband centered on the desired frequency. Nov 15, 2023 · I have a band-reject (notch filter) duplexer with low side at 462 MHz (transmitter) and high side at 467 MHz (receiver). Groups. A TX/RX Systems Vari-Notch duplexer is used in this video. nanovna-users@groups. This is a tutorial on howto tune a basic notch type, mobile duplexer using a Siglent VNA. It didn't go very well . Ended up sending the Duplexer to BuyTwoWayRadios. There are people that advertise on Ebay offering Duplexer service as well, fees are about the same. I live in Calif i think i sent to a Florida address. Jun 27, 2025 · Proper tuning of an RF duplexer is essential to ensure high-quality performance in any system where shared antennas and simultaneous transmit/receive operation are required. . For proper results and tuning, a vector network Analyser is preferred commonly called a VNA because it includes VSWR readings at the same time. 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. A method of tuning that produces pretty good results. I have received several Emails asking for help (or how do I) tuning a duplexer, so I will make my best attempt telling you the methods I and my partners in crime use to tune a duplexer. io Jul 21, 2020 · Equipment needed to tune a duplexer properly Generally the minimum you should have to tune a duplexer is a spectrum analyser with a tracking generator. In this tutorial I show how to tune the curves, understand the retu Aug 17, 2022 · Any VNA that can show a frequency spectrum live while you tune the duplexer will do. 2GHz repeater duplexer using a NanoVNA V2plus4. 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 (VNA). I would like to learn on how to tune a duplexer, so I’ve watched many tutorials on the use of a VNA. lbe cgn fwb ihi yki olb fpd zvz rvn oiu ljp eti byj anh ajl