Swr ms sdr. ASTM D-3034, SDR 26 and F-679 PS115 for workmanship, extrusion quality, stiffness, impact resistance, dimensions and structural performance. Extruded pipe components are made from PVC material with a minimum cell classification of 12454, 13343 or 12364 as defined inASTM D-1784.

Swr not perse, (that is typical for waves when sending) but a good and a bad swr has to do with the resonant frequency of that antenna, the more the antenna is resonant, the better it works. ... with a wide open front end like most SDR dongles have, the tuner will act as a preselector to reject a lot of other signals and improve the ...

Swr ms sdr. Analyzing GSM Signals. DRM Radio Decoding. Decoding 433 MHz ISM Band Weather Stations. Single Board Computer. QRP (FT8, JT9, WSPR etc) Monitoring Station. Performing Replay Attacks with RTL-SDR and RpiTX. Radio Astronomy. Radio Astronomy Overview. Hydrogen Line Galactic Radio Astronomy.

Dual receiver (mixing A + B or A&B audio in stereo) Adjustable bandwidth: HPF from 0Hz to 2700Hz, LPF from 100Hz to 20kHz. Integrated SWR/power meter (HF) Automatic and manual Notch filter. Switchable AGC (AGC) with adjustable attack rate. Range map, with the ability to automatically switch modes.

An Enhanced audio streaming subsystem to support multiple, simultaneous, clients. Various performance enhancements and fixes. The SmartSDR for Windows installation package includes SmartSDR CAT, DAX, and release notes which contain important release-specific information regarding software features, bug fixes, and release caveats.The SDRs tested include the RTL-SDR Blog V3, Airspy Mini, SDRplay RSPduo, LimeSDR Mini, BladeRF 2.0 Micro, Librespace, who are the people behind the open hardware/source SatNOGS satellite ground station project have recently released a comprehensive paper (pdf) that compares multiple software defined radios available on …

Oct 15, 2012 ... ... sdr Simulation SteppIR UHF vertical dipole verticals VHF. Recently popular. Improving the Super-J · Build this Vertical Portable HF Antenna ...skip.land #1 | scratchmoney's 0-30 mhz hi-fi wide sdr (v2) | full-wave 80m skywire horizontal loop + lz1aq quad-loop (switchable) best kiwi snr in south usa @ night!The name “SWR” is derived from stale-while-revalidate, a HTTP cache invalidation strategy popularized by HTTP RFC 5861 . SWR is a strategy to first return the data from cache (stale), then send the fetch request (revalidate), and finally come with the up-to-date data. With SWR, components will get a stream of data updates constantly and ...RSP1A covered the group of channels around 123MHz and RTL-SDR took care of the Tower on 134MHz. See the following figure: We set the bandwidth of RSP1A to 5MHz which gave us 14-bit sampling precision (better audio quality). We limited the bandwidth of RTL-SDR and put the center frequency the same as the frequency of the Tower (134.55MHz).TelescopeMan demonstrates the free SWR Plotter software for Flex radios. This permits you to test an antenna for resonance and plot the results.Here Are Some Pointers: Our most popular software defined radio receivers (SDRs) are the NESDR SMArt, NESDR SMArt XTR, and HackRF. If you are interested in amateur radio frequencies (high frequency; HF), you will want to purchase a Ham It Up upconverter along with your SDR. Alternatively, you can choose one of our HF SDR Kits, which will come ...6-letter words that start with swr. swr csd. swr ims. swr lss. swr lin. swr ots. swr pgn. swr prs. swr rip.Willkommen beim Südwestrundfunk! Hier erwarten euch täglich neue Videos, aus dem Südwesten und der ganzen Welt. Ob persönliche Geschichten von Menschen aus Baden-Württemberg und Rheinland ...Τύποι tuner sdr και το εύρος ζώνης συχνοτήτων που καλύπτουν: ... ταχύτητα μετάδοσης δεδομένων στην usb θύρα έχει μετρηθεί στα 3.2 ms/s ... Λειτουργία και κατασκευή ενδεικτών για rf και swr.

View. $345.99. QRO.cz RX Audite SDR Antenna Switch Controllers. Antenna Switch Controller, 2-Way RX Splitter, RX Preamp, 0.1 to 60 MHz, 200W Max, 50 ohm, 13.8 VDC, Incl. DC Cable, Each. See More Specifications. In Stock (more than 10 available)Chrome tries to guess whether you want audio or not, but doesn't always get it right. On some WebSDR sites, you'll get an "audio start" button, on some you don't. If you don't get audio, try the following: At the top right, click the 4 vertical dots, and then Settings. At the bottom, click Advanced.Software Defined Radio (SDR) Unter Software Defined Radio (SDR) fasst man Konzepte für Hochfrequenz-Sender und -Empfänger zusammen, bei denen kleinere oder grössere Anteile der Signalverarbeitung mit Software verwirklicht werden. Die Analogkomponente von SDR-Geräten kann ein Geradeausempfänger oder ein Überlagerungsempfänger …Mike's SDRuno frequency database. Many thanks to Mike Ladd at SDRplay who notes that he has posted his extensive SDRuno frequency banks on the SDRplay website. If you aren't a frequent user of SDRuno's memory banks, I would highly recommend loading Mike's frequencies as a means of a little radio frequency discovery! Click here to ...

Good SWR characteristics up to 450MHz. Receiver protection circuit to limit any transmit RF spikes. Control Line input for radios that have a key line output. An AUX output that can be set to ground to receive or ground to transmit. Power off bypass sets the transceiver to the antenna. Adjustable receive delay 50ms to 4 seconds. Product Manuals.

SmartSDR v3.4.21. This is the SmartSDR for Windows Integrated Installer which supports the FLEX-6300, FLEX-6400, FLEX-6400M, FLEX-6500, FLEX-6600, FLEX-6600M, and FLEX-6700. It contains the following SmartSDR Windows-based client software: The SmartSDR v3.4.21 Release Notes are also included.

Some more great gear being offered, including a rare (in excellent condition) Hallicrafters SR-2000 Hurricane Transmitter and P-2000 power supply. The HA-20 remote VFO and antenna bridge as well as the HA-1 T.O. keyer will also be available. Newer eHis latest is a SDR Plotter for the 6000 Series which turns your Flex 6000 into a SWR Plotter that will automatically sweep your antenna and plot the results for you. He also has created several other useful utilities like a Memory Management System and a Voice Keyer for the 6000 series. For those of you who want to be able to start and stop ...WebSDR servers can register themselves automatically on this site, leading to the below list of currently active WebSDR servers. Currently there are 0 servers active, with 0 users and 0 MHz of radio spectrum. Filter band: and region: and mobile support and covering MHz. Location and URL. Frequency range.By using an RTL-SDR dongle together with a low cost noise source it is possible to measure the response of an RF filter. Also, with an additional piece of hardware called a directional coupler the standing wave ratio (SWR) of antennas can also be measured. Measuring the response of a filter can be very useful for those designing their own, or for those who just want to check the performance ...

In our last post Adam Alicajic showed us on YouTube how to determine the frequency response of an RF filter using just a wideband noise source an LNA and an RTL-SDR dongle. In his latest video Adam shows how the SWR of an antenna can be measured using almost the same low cost equipment. One additional piece of hardware required to measure the SWR is a directional coupler which can be bought on ...The Randolph County School System does not discriminate on the basis of race, color, national origin, sex, disability, or age in its programs and activities and provides equal access to the Boy Scouts, Girl Scouts, and other youth support groups as provided by law.The Radioddity QR20 is an ultra-portable full-frequency full-mode SDR transceiver with reception from 100kHz to 2GHz as well as transmit from 160m to 70cm, supporting ... Tune your antenna directly so that its impedance matches the transceiver and reduces SWR. Extra Functions Available. You can customize the QR20 with optional modules that add ...Mar 11, 2015 · By using an RTL-SDR dongle together with a low cost noise source it is possible to measure the response of an RF filter. Also, with an additional piece of hardware called a directional coupler the standing wave ratio (SWR) of antennas can also be measured. Measuring the response of a filter can be very useful for those designing their own, or for those who just want to check the performance ...Multiple sclerosis (MS) is a progressive autoimmune disease that affects over two million people worldwide. It makes your immune system attack the protective sheath surrounding you...On Ubuntu 20, 22, and other Debian-based systems, you can install the RTL-SDR software with the following command. sudo apt install rtl-sdr. This will install the librtlsdr library, and command line tools such as rtl_sdr, rtl_tcp, rtl_fm, and rtl_test. Next, install the Python wrapper for librtlsdr using: sudo pip install pyrtlsdr.17 Sdr Remote Entry Level jobs available in Mineral Wells, MS on Indeed.com. Apply to Account Executive, Student Mentor, Entry Level Account Manager and more! ... MS. Sort by: relevance - date. 17 jobs. Entry Level Account Manager. Resilience 3.4. Germantown, TN. $50,000 - $65,000 a year. Full-time. Monday to Friday +1. Easily apply.Spektrum is a popular spectrum analyzer program that is used with RTL-SDR dongles. It is based on the command line rtl_power software and is compatible with both Windows and Linux. Thanks to it's easy to use GUI it is an excellent piece of software for scanning and determining where active signals exist, or for measuring filters and antenna SWR with a noise source. Recently SV8ARJ (George) and ...The 10 MHz frequency span you can use it for characterize the HF Band-pass, Low-pass, High-pass or Notch filters. All you need is one noise source (noise generator) which you can find on eBay for about 20 USD. With addition of directional coupler (for another 20$ USD), you can using SDRplay and SDRuno for HF antenna analyzer, measuring SWR like ...Details. One of the few SDRs with 2m VHF! Modern SDR transceiver for shortwave, 6m and 2m VHF with excellent receiver performance. Suitable for all modes incl. CW, SSB (USB, LSB), FM, AM and digital modes. With wide band receiverfrom 9 kHz to 65 and 96 to 148 MHz. The SunSDR2-Pro, version 5, is a refined successor to the SunSDR2 transceiver.SDRuno calculates this and the S meter and spectrum display accordingly. What you observe is that the "noise floor" of the receiver gets worse (increases) as you reduce the gain. The received signal however does not change and will display approximately the same level. Try this experiment.Symptoms of subchondral sclerosis include pressure and pain within the bone, explains Carol Eustice for About.com. Some physical signs of the condition are thicker bone density and...Good SWR characteristics up to 450MHz. Receiver protection circuit to limit any transmit RF spikes. Control Line input for radios that have a key line output. An AUX output that can be set to ground to receive or ground to transmit. Power off bypass sets the transceiver to the antenna. Adjustable receive delay 50ms to 4 seconds. Product Manuals.For each link above you need the rbf file, use SparkSDR to load gateware. In SparkSDR right-click on the Hermes-Lite 2 entry, if you have other Hermes / Hermes variants on the network then you see an entry for each radio, so be careful and select the correct entry! Close SDR Console. Start SparkSDR. Right-click on the entry for the Hermes-Lite2 ...SDR# (SDRSharp) SDR# (read SDR Sharp) is a simple, intuitive, small and fast PC-based DSP application for Software Defined Radio. It's written in C# with both object design correctness and performance in mind. The main purpose is to offer a simple proof of concept application to get hands into DSP techniques. Supported devices include: Plugins.In this video, we take a look at how to configure SDR# to use the RTL-SDR Dongle to listen to HF Ham Bands, Short Wave and AM Broadcast.Sponsored by http://w...Below are some of the past Supply Discrepancy Reporting (SDR) meeting minutes and documents of other related initiatives. If you need access to documents: contact us. Minutes. Agenda/Attendees/Other. 23-1 Meeting Minutes (Nov 29, 2023) SDR PRC 23-1 Brief and Agenda. 23-1 Action Item Tracker TBD. 22-2 Meeting Minutes (Nov 15, 2022)PVC D D3034 Sewer Main Pipe is for sewer and storm drainage purposes only. Used in gravity fed waste elimination systems, it is highly resistant to chemicals commonly found in sewage and industrial waste. Also known as SDR 35, PVC D D3034 Sewer Main Pipe is available in two joining methods: gasketed or solvent weld. PVC D D3034 Sewer Main Pipe extends from the end of the building drain and ...3.1 Release. Simon Brown • Jul 26, 2021. Release Date. Version 3.1 is the cumulation of 6 1/2 years of programming, SDR Console can now be considered a …

SunSDR2 DX is a direct sampling 100 watt SDR transceiver developed for the serious DX:er and contest operator. It covers all HF bands plus 50 MHz and 144 MHz VHF bands with a general coverage receiver. It combines high performance and 100 watt transmit power in a small package with a LAN interface for maximum flexibility. Remote control …measuring SWR with an SDR in sdrconsole 3. I have noticed that sdrconsole has a built in SWR and power meter on its TX window. (dont have a picture because i am on mobile) Basically i want to know if i would hook up a LimeSDR mini to my PC, and use sdrconsole 3 to transmit with it (on legal frequencies) would sdrconsole show me the SWR the ...AirSpy系列SDR官方软件,官网目前最新是v1910(英文),但由于在v1786版本后更改了框架和插件接口方式,使很多非常好用的老框架插件都已无法使用,新框架插件又寥寥无几,导致失去了该软件最大的特色。此处发布的汉化版的版本经过多次测试,在保证绝大部分好用插件的兼容性下,确定的版本号 ...This involves measuring the SWR characteristics of FPV antennas. SWR is a metric that describes how well the impedance of an antenna is matched with the …There is also some good advice in the comments section. We note that magnetic loop antenna seem to work fairly well with the RTL-SDR in V3 in direct sampling mode, but you may need to filter out the broadcast AM band to avoid overload if the loop doesn't do this already. An example small PK-Loop antenna for receiving shortwave with …Sep 14, 2018 · FPV stands for 'First Person View', and is a term used to describe the hobby of flying remote controlled aircraft entirely via the view from a wireless camera that transmits live video to the pilots screen or video goggles. Part of the FPV hobby is to not only enjoy flying, but also to tweak the wireless video equipment for maximum range and reliability. This involves measuring the SWR ...Over on his blog Anders J. Ørts has created a good writeup showing how he used the combination of an Airspy SDR with SpyVerter upconverter, SWR-Bridge and a noise source to tune his HF dipole for the 40 meter and 20 meter bands. If you're interested we also have a writeup on doing something similar with the RTL-SDR here. By connecting the output of the noise source to the SWR-bridge input ...

SDR-Console V3 is the latest in the line of the free SDR-Console software packages from developed Simon Brown. Recently SDR-Console V3 left its 'preview' software status and moved into 'beta' production status. SDR-Console is a general purpose SDR program similar to other software like SDR#, HDSDR and SDRUno. SDR-Console V3 however sets itself apart by being one of the most feature rich ...The goal of DeepRad appears to be a modular RTL-SDR that can easily be used as a module on a 'motherboard' PCB of your own design. DeepRad is currently in the 'Coming Soon' stage on CrowdSupply, and will probably be released for crowdfunding in the next few months. DeepRad is a modular version of the RTL-SDR, a product beloved by radio enthusiasts.Relapsing-remitting multiple sclerosis (RRMS) is a type of multiple sclerosis that primarily affects younger patients who are in their 20s or 30s. This form of multiple sclerosis o...If you want to test the very latest experimental code, you need to compile it on a PC, and then flash the firmware into the NanoVNA. Ohan's guide covers this all. For example, one recent update now enables time-domain reflectometry for measuring coax cable length, which we explored in a previous post. Alternatively according to the GitHub ...Dual receiver (mixing A + B or A&B audio in stereo) Adjustable bandwidth: HPF from 0Hz to 2700Hz, LPF from 100Hz to 20kHz. Integrated SWR/power meter (HF) Automatic and manual Notch filter. Switchable AGC (AGC) with adjustable attack rate. Range map, with the ability to automatically switch modes.Recently a reader of RTL-SDR.com, Pavel wrote in to let us know about a new program called 'Spektrum' which he has written. Spektrum runs on Windows and Linux and turns an RTL-SDR dongle into a spectrum analyzer in a similar way to rtl_power GUI front ends and RTLSDR Scanner. However one key improvement is that it is based on a …The ANAN-10 PA/Filter board provides 3 seperate antenna ports, 10+ watt power amplifier, SWR bridge, Low Pass Filtering and 13.8VDC connector. The Hermes board includes low level RF inputs/outputs and a 26 pin I/O connector, as well as 2W audio stereo speaker ouput, headphone, mic and key jacks. ... My first serious foray into SDR was a Flex ...RTL-SDR (RTL2832U) and software defined radio news and projects. Also featuring Airspy, HackRF, FCD, SDRplay and more. ... In the past we've posted a tutorial showing how to use a wideband noise source for measuring filters and antenna SWR. However, ... After a 500 ms settling time the power level is measured and recorded in a CSV file, then ...Example - SDR. SDR for a 10 inches ASTM D2241 - PVC Pipe with outside diameter 10.750 inches and wall thickness 0.168 inches can be calculated as. SDR = (10.750 in) / (0.168 in) = 64. A SDR 64 means that the outside diameter - D - of the pipe is 64 times the thickness - s - of the wall. with a high SDR ratio the pipe wall is thin compared to ...There is also some good advice in the comments section. We note that magnetic loop antenna seem to work fairly well with the RTL-SDR in V3 in direct sampling mode, but you may need to filter out the broadcast AM band to avoid overload if the loop doesn't do this already. An example small PK-Loop antenna for receiving shortwave with an SDR.His latest is a SDR Plotter for the 6000 Series which turns your Flex 6000 into a SWR Plotter that will automatically sweep your antenna and plot the results for you. He also has created several other useful utilities like a Memory Management System and a Voice Keyer for the 6000 series. For those of you who want to be able to start and stop ...Install your SDR receiver 15 Get started with SDR++ 15 'Source' - Selecting the SDR receiver you use 15 Source options 17 Gain control (or LNA Gain) 17 AGC ("automatic gain control") 17 Sample rate 18 Bias-T 18 Offset tuning for up-converters and down-converters 19 IQ Correction 20Here Are Some Pointers: Our most popular software defined radio receivers (SDRs) are the NESDR SMArt, NESDR SMArt XTR, and HackRF. If you are interested in amateur radio frequencies (high frequency; HF), you will want to purchase a Ham It Up upconverter along with your SDR. Alternatively, you can choose one of our HF SDR Kits, which will come ...CPVC | uPVC | AGRI | SWR | PPR-C | WATER TANKS | BATH FITTINGS | ADHESIVES P`ICE LIST w.e.f. from 7th November 2022 #Never Cracks Under Pressure "Hi - this is Tiger Shro˜ and I'm delighted to be a part of the APL ... CPVC FITTINGS IN SDR 11 AS PER ASTM D-2846 (HSN Code : 391740) ½" 15 CMN02040V 600 23.00 13800.004) Insert the Antenna Cable into the SWR Meter. Next, you need to plug your antenna into the SWR meter. You'll see that the antenna port is marked either "antenna" or "ANT". Insert it into the appropriate port the same way you did with the coaxial cable. Make sure that it's plugged in securely.If you’re looking for an efficient and effective project management tool, MS Project Gratuit is a great choice. This software offers a wide range of features that can streamline yo...What is RTL-SDR? RTL-SDR is a very cheap ~$30 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). Depending on the particular model it could receive frequencies from 500 kHz up to 1.75 GHz. Most software for the RTL-SDR is also community developed, and provided free of charge.The gain an LP antenna exhibits is due not to active amplifications—antennas are passive devices—but to the concentration of the received (or transmitted) signal to only a segment of the 3D space it is in. The more directional an antenna, the more it rejects off axis signals. This means if you are trying to discover signals you will have to rotate the antenna on each segment of the band ...

WebSDR receivers. This list of currently active WebSDR servers is kindly provided by PA3FWM. You may see a Java security refusal when trying to use these services—explanation and solution here. Please note the RSGB does not support any of these services and is not responsible for any technical issues arising from their use.

Go to file and launch WSJT-X and select Radio Tab. Select Kenwood TS-2000 rig and calico CAT and also choose the other port (virtual serial). Therefore now select the band rat to match the plugin (19200). If everything is working correctly then click on Test CAT button and setup.

FLEX-6000 SIGNATURE SERIES - FlexRadio ... radio. The ...What is RTL-SDR? RTL-SDR is a very cheap ~$30 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). Depending on the particular model it could receive frequencies from 500 kHz up to 1.75 GHz. Most software for the RTL-SDR is also community developed, and provided free ...Integrated SDR receiver, CW decoder, DSP filters, AGC, NR, ATT, experimental modes CW, AM, FM, quick menu, persistent settings, improved SSB TX quality. LCDfix,selectableCWpitch. R1.01d 2019-05-05 Q6 now digitally switched (remove C31) - improving stability and IMD. Improved signal processing, audio quality, increased bandwidth, cosmetic ...Skywave Linux is an operating system using bleeding-edge technology to robustly access broadcast media, utility, military, and amateur radio signals from almost anywhere in the world, using distant servers on the internet and locally connected hardware. Skywave Linux is set up to connect easily to any of the networked, state of the art software ...SDR++ is an open source, cross platform, C++ based GUI general receiver program for various SDRs including the RTL-SDR. Since it's alpha release in mid 2020, it has undergone huge amount of development, and is quickly becoming the main program of choice for many users due to it's efficiency, cross platform and multi-SDR hardware support and increasing feature set. And with an easy GUI very ...The Yaesu FT-710 AESS is a feature-rich, competitively-priced SDR transceiver with exceptional receiver performance. Despite a few minor drawbacks and interface differences compared to the Icom IC-7300, the FT-710 impresses with its quiet audio and powerful reception capabilities. Its extensive range of functions and …Join the K9DUR Software Discussion Group. BandText Table Editor (v1.0.2 -- Released: 10/28/2012) -- This utility allows you to safely edit the BandText table in a PowerSDR database. Editing the BandText table will allow you to change the label for a specific frequency or range of frequencies. Works with PowerSDR v1.18.1 or later (XML database).Managing resources effectively is crucial to the success of any project. Without proper resource allocation, projects can face delays, budget overruns, and a loss of productivity. ...Yesterday the SDRplay team released the $99 US RSP1A, which is a revision of the RSP1A. In this post we present a review comparing its performance against the older RSP1 and the currently selling $169.95 US RSP2. We aim to mainly show demonstrations of improvements that we've found on the RSP1A in areas where we …

sks synmasks hsryanymh hntayoldies radio stations 50 Swr ms sdr fylm sks ba zyr nwys [email protected] & Mobile Support 1-888-750-8177 Domestic Sales 1-800-221-6143 International Sales 1-800-241-2476 Packages 1-800-800-7516 Representatives 1-800-323-7603 Assistance 1-404-209-3325. Today SDRplay have released the RSP1A, a revision of the popular $99 USD RSP1 with some significant improvements. The press release is pasted below: SDRplay Limited has today announced the launch of a new Software Defined Radio product - the RSP1A. The SDR-play RSP1A is a major upgrade to the popular RSP1 and is a powerful wideband full featured 14-bit SDR which covers the RF spectrum from 1 .... sks rjal ma badh SDR is a method for rating pressure piping. SDR= D/ S where 'D' is the outer diameter and 'S' is pipe wall thickness (mm). An SDR 11 pipe is outer diameter 'D' of the pipe is eleven times the thickness 'S' of the wall diameter. A higher SDR means, a lesser pipe thickness with a lesser pressure rating. A lower SDR means, a higher pipe thickness ...Solvent Weld Bell. Westlake Pipe & Fittings' Solvent Weld SDR 35 Sewer Fittings line is a fully-integrated SDR 35 solvent weld sewer fitting line with structural integrity for easy assembly. The ideal choice for building drainage and sewer applications, our solvent weld sewer pipe is available with either solid or perforated walls. throw pillows at kohlturkce altyazili prn Preamplifier - Installed in the QRO-RX-AUDITEPRE Model: insertion loss compensation, up to 14 dB of additional gain. Preamplifier Can be turned ON for SDR even if the controller is OFF. Supply Voltage: 12-14 VDC (13.8 VDC recommended) Supply Current: DC Max. 0.7A with Preamp. Maximal TX Power: 250W, 200W Recommended. swpr hywannewaoa etf New Customers Can Take an Extra 30% off. There are a wide variety of options. Westlake Pipe's Solvent Weld SDR 35 Sewer Fittings line is a fully-integrated SDR 35 solvent weld sewer fitting line with structural integrity for easy assembly. The ideal choice for building drainage and sewer applications, our solvent weld sewer pipe is available with either solid or perforated walls. The Westlake Pipe P Series sewer fitting ...If you are using hdr on your monitor, then you prob would use it. If you are using sdr (like most people) you don't need to force it, it's already the default. And if you're capturing games you shouldn't have a display capture in your game scene anyway. You should use a game capture source set to capture any full-screen application.Aug 29, 2017 · The second video shows how the RTL-SDR, noise source and Spektrum can be used to tune a cavity duplexer. A cavity duplexer is an adjustable set of filters that allows you to use a single antenna for TX and RX at different frequencies. It can be tuned by adjusting screws on the unit body. In the third video he shows how to examine the response ...