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Software Defined Radio (SDR) for analog and digital modulation modes, can demodulate AM envelope, AM synchronous, AM stereo, LSB, USB, FM, FM Broadcast, DRM30, DRM+

In this article WB8NUT review the most popular amateur radio related digital mode software for windows and MacOSX

SDR++ is a cross-platform, open-source SDR software designed for minimal bloat and ease of use, supporting Windows, Linux, macOS, and BSD operating systems. It incorporates multi-VFO capabilities and offers extensive hardware compatibility through both _SoapySDR_ and dedicated modules. The software features SIMD accelerated DSP for efficient signal processing and provides full waterfall updates when possible, which enhances signal browsing. Its modular design facilitates the development of custom plugins, allowing users to extend its functionality. The application's focus on a bloat-free architecture and user-friendly interface aims to simplify the experience of working with Software Defined Radios. The full waterfall update mechanism is particularly beneficial for visualizing and identifying signals across a wide frequency spectrum, improving operational efficiency for radio amateurs. The modular plugin system enables community contributions and specialized enhancements, making _SDR++_ adaptable for various amateur radio applications, from general listening to specific digital mode decoding.

Operating a modern amateur radio station, particularly for advanced digital modes or microwave experiments, often requires precise test and measurement equipment. This resource from NI (National Instruments), now part of Emerson, showcases a wide array of hardware and software solutions designed for demanding test objectives. Their portfolio includes modular instruments and configurable software interfaces, such as _LabVIEW_ and _TestStand_, which integrate AI assistance via _NI Nigel™ AI_ for code completion and sequence building. For those involved in RF and microwave work, the offerings extend to vector signal transceivers, RF signal generators, software-defined radios, and spectrum analyzers. These tools are crucial for characterizing antenna performance, optimizing transceiver circuits, or developing custom radio systems. The company emphasizes its 50 years of innovation, with 40 years dedicated to _LabVIEW_, highlighting a long-standing commitment to engineering solutions. The site also details products for data acquisition, electronic test, and wireless design, covering components like CompactDAQ modules for precise sensor measurements and various communication bus interfaces. Their events and perspectives sections offer insights into topics such as 5G technology and strategies for breaking out of testing silos, providing a broader context for their measurement solutions.

The home page of WSJT-X Improved, an enhanced version of WSJT-X, the popular tool for hams interested in digital modes such as FT8 and JT65. The software provides enhancements and improvements to the original WSJT-X program, making it easier and more efficient for ham operators to communicate digitally. Whether you are a beginner or an experienced operator, this download can help enhance your digital communications capabilities. Free downlaod and full description of improved features.

Xggcomms specialise in producing cost effective, high quality CAT and Audio interfaces for Icom and Yaesu Amateur Radio Equipment. Our interfaces are fully compatible with a large range of CAT and Digital Mode control software.

Interface board was for connecting Yaesu FT-817ND transceiver to Android phone or tablet. The board was developed for experimenting with RTTY, SSTV and other digital modes using DroidRTTY, DroidSSTV and other software on an Android phone.

Narrow Band Emergency Messaging Software (NBEMS) is an Open Source software suite that allows amateur radio operators to reliably send and receive data using nearly any computer (Windows, Mac, and Linux) and any analog radio without requiring a dedicated digital infrastructure or specialized modem hardware

Documents S21RC's construction of an impedance transformer harness for a VHF/UHF cross yagi, utilizing 20m of _RG179_ cable. Details the creation of a DIY RF sampler with a -50dB sampling output, primarily for measuring HF radio PA section output with a Spectrum Analyzer, also applicable for _Pure Signal_ transmission. Chronicles the deployment of a 200m long beverage antenna for the _S21DX IOTA_ operation in 2022, positioned 2m above ground. Discusses the construction of a 3-element short beam for 10m to replace a previous 2-element antenna, with assistance from S21DW. Provides guidance on operating cheap _PA-70_ and _PA-100_ type Chinese SSPAs using IRF530 MOSFETs, emphasizing the necessity of a final LPF. Outlines the design and construction of a fully isolated interface for radio-to-computer connections, supporting various digital modes with isolated ground, audio transformers for IN/OUT, optical isolation for CAT/CIV, and isolated PTT/COS lines. Includes a log of software updates, such as the _HMI/TFT for NX8048K070_ and _2.1.14 Lite_ release with bug fixes for PEP hold and gradual watt decay.

Presents various amateur radio topics through blog posts, detailing operational experiences and technical insights from the perspective of SV2YC. The content frequently discusses antenna projects, such as a **portable 20m/40m dipole** designed for rapid deployment, and explores the performance characteristics of different wire configurations in varied field conditions. Observations on propagation and band activity across the HF spectrum are also regularly documented, providing practical context for fellow operators. Specific entries often include detailed accounts of **DX contacts** and participation in minor contests, outlining station setup, power levels, and antenna choices. The blog also covers modifications to commercial transceivers and homebrew accessory construction, offering practical advice on improving station efficiency and functionality. Further posts delve into software applications for logging and digital modes, sharing configurations and operational tips for maximizing their utility in daily amateur radio activities.

The Covey Hill Amateur Radio Club operates a 146.685 MHz analog repeater with an 88.5 Hz PL tone, alongside several digital repeaters. The resource details specific frequencies and modes for D-STAR (145.590 MHz, 1266.300 MHz voice, 1297.675 MHz data on 23 cm), DMR-Marc (448.525 MHz), DMR-Brandmeister (441.750 MHz), Yaesu Fusion (449.725 MHz), and P-25 Digital (147.315 MHz). It also lists Echolink node 595040 (VE2REX-R) as an access point for the club's network. A recent update, dated June 19, 2024, announces the VE2REX analog repeater and Echolink are fully functional again, after resolving issues including a conflicting 100.0 Hz tone, software repairs for Allstar and Echolink, a suspected defective USB port on the Mini PC, and a faulty exciter in the Motorola Quantar repeater. Guy, VE2VMT, was instrumental in troubleshooting these problems. The club, established in 1994, provides a calendar, news, links, and membership information, with Linda Cullen, VE2NJK, serving as president and VA2DBJ as webmaster.

xCAT is an helper application for the FlexRadio 6000 series running on macOS computers to control via CAT protocol tranceivers, while xDAX purpose is to provide a way for Digital Mode Software like Fldigi, WSJT-X to access the digital audio data (DAX) of the FlexRadioTM

A table that summarize all known amateur radio emission modes, with reference to software and platform available for digital modes

Learn all about FT8 and FT4 digital modes in ham radio. Discover how to configure software to use these powerful modes for making contacts even in poor conditions. Find out how to hunt for awards and view instant statistics of your transmissions. Explore the benefits of using digital modes such as FT8 and FT4 for enhancing your ham radio experience.

The PCB can produce a High Frequency RF signal in the range of 1MHz to 12.5MHz using an AD9833 Direct Digital Sequence (DDS) frequency synthesizer. The signal can be modulated with different Weak Signal modes such as WSPR, JT9 and JT65 using our Arduino 5V/16MHz Pro Micro software.

The T41-EP SDT is an open-source software defined transceiver designed by Albert F Peter (AC8GY) and Dr. Jack Purdum (W8TEE) with contributions from others. This detailed guide covers the design, theory, and assembly of the transceiver, making it suitable for both beginners and experts in SDR. Learn about Digital Signal Processing and how it is implemented in the T41-EP, as well as the modularity of its internal design. Kits are available for easy assembly, and a supportive community on SoftwareControlledHamRadio Groups.io provides additional resources for users. Note that software support for additional bands is in progress, offering potential future upgrades.

WSJTX-Controller-v2, or Otto, functions as an assistant for the WSJT-X amateur radio program, specifically designed to enhance operational efficiency for weak signal digital modes. The software automates several key tasks, including call management, prioritizing DX stations based on user-defined criteria, and optimizing frequency selection within the WSJT-X interface. It requires a modified version of WSJT-X to function correctly, integrating directly with its core processes to provide augmented control. Otto supports various digital modes, facilitating auto-logging of contacts and generating specific alerts for desired stations or conditions. It is engineered to streamline the workflow for operators engaged in DXing and general weak signal communication, offering features like automatic CQ responses and intelligent band monitoring. The utility is not compatible with certain other amateur radio software and is explicitly noted as unsuitable for contest operations or the WSJT-X Hound mode, indicating its specialized focus on non-contest DX and casual operating. The project's GitHub repository provides the source code and documentation, allowing users to review its implementation and contribute to its development. The software's design emphasizes automation to reduce operator intervention during routine digital mode operations.

Learn how to troubleshoot and configure ICOM 7300 Rig Control under Linux for seamless communication between your radio and computer. Author Colin from Canada shares his insights and experiences with setting up rig control software for digital signal decoding.

Pi-Star is a software image built initially for the Raspberry Pi. The design concept is simple, provide the complex services and configuration for Digital Voice on Amateur radio in a way that makes it easily accessible to anyone just starting out, but make it configurable enough to be interesting for those of us who cannot help but tinker.

Ground Station offers real-time satellite tracking and radio communication capabilities, primarily for amateur radio operators engaged in satellite operations. It utilizes **TLE data** from sources like CelesTrak and SatNOGS for precise orbital prediction and integrates with various SDR devices, including RTL-SDR, SoapySDR, and UHD/USRP radios, to receive live signals. The software provides automated antenna rotator control and **Hamlib-compatible** rig control with Doppler correction, crucial for maintaining signal lock on fast-moving LEO satellites. It supports IQ recording in SigMF format and decodes several digital modes such as SSTV, FSK, GFSK, GMSK, and BPSK with AX25 USP Geoscan framing. Dedicated interfaces are available for satellite tracking, SDR waterfall displays with live transcription and packet decoding, and telemetry packet viewing. Users can manage TLE data synchronization and SDR hardware, along with browsing decoded outputs through an integrated file browser. An observations dashboard and DSP topology view further enhance the operational experience, providing comprehensive tools for monitoring and analyzing satellite passes.

Learn about the LinHT handheld SDR radio, an open-source, Linux-based project that is shaking up the ham radio and SDR communities. This guide is perfect for hams new to digital voice and interested in exploring experimental radio platforms. Discover what sets LinHT apart from traditional handheld radios, how it leverages SDR technology and Linux operating system, and why it's generating buzz in the ham radio landscape. Dive into the world of software-defined handheld radios with this beginner-friendly overview.

FreeDV uses an audio codec as a software based modem to decode and encode the voice and text data from your computer. The data is encoded and then is transmitted over the HF radio using AF signals that can then in turn be decoded by the receiving station.

DecoAlert 1.0 Beta is a companion application designed to enhance the digital mode operating experience, specifically for FT8, FT4, and FT2. It operates by monitoring UDP data streams from primary decoding software like _Decodium_ and _WSJT-X_ on port 2237. The software provides real-time, priority-based audio alerts using WAV sounds for various conditions, including All Time New Ones (ATNO), new DXCC entities per band/mode, user-defined watchlist callsigns, new Maidenhead grid squares, and LoTW-active stations. It also highlights previously worked stations (B4) and integrates live DX spots from Telnet clusters, offering a comprehensive suite of tools for serious digital mode operators. The application features a built-in SQLite database for tracking worked stations and integrates with LoTW user lists to identify confirmed contacts. A DX Cluster client supports multiple Telnet servers, providing a broad view of propagation. PSKReporter statistics are available by band and mode, offering insights into signal paths. The QSO log viewer includes search and filter capabilities, while an _OpenStreetMap_ (OSM) interface visualizes spot locations, aiding in situational awareness. DecoAlert requires Windows 10/11 (64-bit) and compatible digital mode software configured to send UDP data.

This page, authored by VU2ESE, delves into the sBitx, a Software-Defined Radio (SDR) designed for homebrewers. The content covers the hybrid SDR circuit, software, user interface, hacking/modifying the sBitx, performance, and more. It explores the various components of the sBitx, including the exciter, filters, amplifiers, digital circuit, and modems. The page aims to provide information and guidance for hams interested in building their own SDR. Readers will learn about the capabilities, features, and adaptability of the sBitx, making it a valuable resource for DIY radio enthusiasts.

The PicoFox is a versatile fox transmitter for 2-meter ham radio operators, built around the RP2040 microcontroller. With open-source hardware and software, it can be customized to suit your needs, from APRS to other digital modes. This fully assembled transmitter comes with a rechargeable battery and antenna, ready for use. The design allows for easy addition of features like sensors or interactivity. Modulation is handled in software for smooth FM output, with ample CPU, flash, and GPIO available. Configure your PicoFox by connecting it to a computer via USB and adjusting settings in a text file. Explore the possibilities of this innovative transmitter for your amateur radio projects.

Robust PACKET, developed by Spezielle Communications Systeme GmbH & Co. KG (SCS), is an OFDM variant of the amateur PACKET mode specifically engineered for HF operation. This mode utilizes a 500 Hz bandwidth with 60 Hz carrier spacing, employing OFDM with 8 DBPSK or DQPSK carriers. It supports 200 bps using BPSK and 600 bps with DQPSK, with each subcarrier operating at a constant rate of 50 Bd. Robust PACKET leverages the AX-25 frame protocol for data transmission, similar to standard PACKET. Compared to traditional PACKET, Robust PACKET demonstrates enhanced resilience against multipath propagation and fading effects, critical for reliable HF communications. It also exhibits a more efficient spectral footprint, with sidebands extending only to 500 Hz, whereas 300 Bd FSK PACKET can produce sidebands up to 730 Hz. Operational frequencies for Robust PACKET include 3.61 MHz, 7.0473 MHz, 10.1473 MHz, and 14.1033 MHz, with specific regional frequencies also documented. Decoding software options for Robust PACKET include Wavecom W-Code and Wavecom W-Spectra. The mode is primarily supported by SCS's 'Tracker / DSP TNC' hardware.

The RTL-SDR tuner dongle is a popular tool for amateur radio enthusiasts, transforming a $10 device into a wide-band software-defined radio. This guide outlines using the RTL-SDR as a full-band pan-adapter for conventional receivers, focusing on hardware setup and software integration with HDSDR. Future sections will address RTL-SDR performance compared to native receivers, enhancing digital mode operations with virtual serial ports and audio cables.

This presentation offers a beginner's guide to digital communication modes in Ham Radio, specifically PSK31 and RTTY. It covers the basics like what data modes are and the equipment needed (radio, computer, interface). It explains the technical details like PSK vs. RTTY, AFSK vs. FSK, and data transmission processes. The presentation also provides instructions on software setup, live testing procedures, and where to find data transmissions on different bands. Finally, it covers communication styles and etiquette for data QSOs.

Digital modes troubleshooting can be complex, even with devices like Digirig, which are designed for ease of use. This guide provides solutions for common setup issues in ham radio digital modes, applicable to Digirig and similar interfaces. Key troubleshooting tips include isolating problems, restoring previous configurations, ensuring correct USB and audio connections, and configuring software and hardware settings properly. Community forums offer additional support for specific issues.

Setting up the Yaesu FT-817 and Signalink for data mode communication. Hardware and software required for data mode communication, connect and configure FT-817 and Signalink

The QubeDX is a modular CubeSat-style QRP transceiver designed for digital mode operation with remote Wi-Fi control via VNC. This project integrates a QRPLabs QDX 5W transceiver, an ATU-100 antenna tuner, and a Raspberry Pi 5 in a custom 14x14x14cm 3D-printed enclosure inspired by CubeSat design. Prioritizing affordability and functionality, the system operates on a single 13.8V power supply and includes auto-tuning and software like WSJT-X. With a total cost of under €250, it offers a decorative and portable ham radio solution.

M17 is a community of open source developers and radio enthusiasts. We are building understandable systems in support of the hackers and experimenters' history of ham radio. M17 is developing open source hardware, software, and offers a complete digital radio protocol for data and voice, made by and for amateur radio operators. M17 voice mode uses the free and open Codec 2 voice encoder.

A versatile digital VFO design utilizing the Silicon Labs Si5351a oscillator chip and Nokia 5110/3310 graphics LCD display, operating from 1-160MHz with dual VFO capability. This microcontroller-based system, powered by an ATmega328 processor, features rotary encoder tuning, selectable step sizes, RIT control, and comprehensive band memory functions. Drawing less than 40mA at 3.3V, it significantly improves upon previous DDS designs' power consumption while offering advanced features like S-meter display, VFO lock, and programmable BFO/CIO offsets. The design achieves flexible functionality through simple hardware implementation and efficient software architecture, making it particularly suitable for QRP and portable amateur radio applications.

The N7YG Digital Engine, functions as a streamlined digital modem, supporting **PSK**, **RTTY**, and **MFSK** modes. It eliminates many ancillary logging and awards features found in other software, focusing instead on providing a dedicated digital interface. The software is specifically engineered to complement the N3FJP logging suite, offering a simple digital modem with a floating waterfall display that can coexist on the same screen as the logger. The application includes support for PSK Reporter, EXTFSK, TinyFSK, and K1EL Winkey FSK, enhancing its utility for various digital operations. Key features comprise a separate waterfall window, a main GUI with operational controls, receive and transmit display areas, and 10 Macro Buttons across 10 user-definable macro banks, totaling 100 macros for general and contesting use. Configuration options include sound card selection, digital gain (0-32767), AFC Level (0-100), AFC Width (in Hz), and COM Port TX keying for VOX/SignaLink or direct port control. Input and Output Mixer buttons provide direct access to OS audio mixer controls for precise level adjustments. The software is digitally signed with a security certificate, aiming to prevent conflicts with antivirus programs.

The Icom IC-9700 transceiver, a popular choice for VHF/UHF/1.2 GHz operations, gains enhanced remote control capabilities through Pycom Radio Controller. This software provides direct _CI-V based control_, enabling operators to manage frequency, mode, memories, and tones from a connected computer. It integrates a built-in rigctl server and supports popular satellite tools like Gpredict and SatPC32, facilitating full duplex Doppler control for satellite passes. Key features include real-time meters, a waterfall display, and remote RC-28 integration. Designed for practical amateur radio use, the application streamlines voice and digital satellite operations. It allows for full duplex remote Doppler control, crucial for maintaining accurate frequencies during satellite contacts. The software also incorporates callsign lookup and logging functions, alongside enhanced memory management. Documentation pages offer configuration guidance and operating examples, ensuring users can effectively set up and utilize the software for their satellite communication needs, potentially improving success rates for contacts and contests.

Callsearch is a Windows-compatible software application, version 7.3.6.1, designed for looking up **US** and **Canadian** amateur radio **call signs**, as well as US GMRS call signs. It replaces the previous FCC Lookup program, offering similar functionality with some scaling down, notably replacing Ten-Ten lookup with GMRS call sign search. Key features include searching active and non-active US records, wild card searches for US call signs, and specific US county and city searches using a November 2020 zipcode database. The software provides geographic coordinates, sunrise/sunset times, and license class display. Users can configure themes, save search output in CSV format, and perform batch file processing to CSV. Version 7.2 and later support multiple county selections and an option to include counties within districts. It includes a digitally signed certificate and supports manual and automatic updates of the Master FCC Database. The program runs on Windows 32 and 64-bit platforms, and on Mac and Linux using the WINE emulator with WINEPFX set for Windows 8 or later.

The ZL1WTT resource details an experimental software-based Digital Amateur Television (DATV) system, demonstrating the multiplexing of up to six standard-definition (SD) and one high-definition (HD) channel utilizing _h264 compression_. The author encountered peak data rates reaching 32 Mbit/s, necessitating a shift to Freeview and Sky settings (22.5M Sym/s 3/4FEC) to manage bandwidth. The setup employs four networked computers, with a laptop functioning as the multiplexer to re-code PIDs for various inputs, including looped MPEG2 playlists, MPEG2 encoder card input from a VCR, satellite feeds, and an off-air UHF receiver. The system highlights the inherent flexibility of the DVB transport stream, supporting diverse formats such as MPG2, h264, AC3, and AAC. A significant advantage of this software-defined approach is the absence of video quality degradation from stored MPEG2 files to the displayed output, coupled with the ease of reconfiguring settings for MPEG2 encoder cards (e.g., size, bit-rate, frame rate, video input, coding format) and satellite receiver cards (e.g., frequency, LNB volts, symbol rate, FEC). The author also discusses the development of a new graphical user interface (GUI) using _Gambas_ for Linux, aiming to simplify configuration for this DATV project. Specific hardware components mentioned include Hauppauge WinTV PVR-150 and Nova-S plus cards, with a focus on optimizing analog video input via Y/C (S-video) to minimize frequency roll-off. The resource also provides insights into data rates for HD (1080i) content, recommending 8 to 12 Mb/s for optimal performance. Software utilized includes _Ubuntu Studio 10.04_, WinFF, VLC, and TMPGEnc Editor, underscoring the project's reliance on open-source tools and a foundational understanding of LAN networks and DVB transport streams.

Cloudlog Helper addresses the need for streamlined, automated logging of amateur radio contacts, particularly for operators utilizing digital modes like FT8 or those with limited system resources. This utility syncs real-time rig data and QSO information to various logging platforms, including _Cloudlog_ and Wavelog, supporting mainstream transceivers. It integrates seamlessly with popular digital mode software such as JTDX and WSJT-X, ensuring that contact details are captured and uploaded without manual intervention. Operators can compile the software themselves and configure essential settings, including their Maidenhead locator, Cloudlog server address, API key, and station ID. The application's design prioritizes efficiency and portability, making it a practical solution for hams who prefer automated logging processes. While an unofficial community project, Cloudlog Helper provides a robust framework for automating the often-tedious task of logging, supporting multiple logging services beyond its primary integration. It offers a direct method for hams to maintain accurate and up-to-date logbooks with minimal effort, potentially improving their DXCC or other award tracking by ensuring no QSO is missed.

SDR Television v1.0 operates as a DVB-S2 / AAC / H264 / H265 program, specifically engineered for QO-100 satellite Digital Amateur Television (DATV) operations. It provides a full-duplex solution on modern x86 computers running Windows 10 or 11 (64-bit, 8+ cores, AVX2 support recommended), leveraging DLLs from _SDR Console_ for control of devices like _Pluto_ and _LibreSDR.TV_. The software requires installation of the SDR Radio kit for wideband mode support. Initial development focused on a proof-of-concept for QO-100, with future enhancements planned to include H266 / AV1 / Opus codecs and an improved cross-band user interface. The current stable release functions reliably for QO-100 DATV. Users must install the SDR Radio kit, followed by the SDR Television kit, into the same directory. Support inquiries are handled via the SDR-Radio.com mailing list, ensuring direct assistance for operational questions.

Receiving Digital Amateur Television (DATV) signals requires specialized software to interface with hardware tuners and decode the video stream. The _MiniTioune_ software, developed by F6DZP, serves this purpose, providing a Windows-based application for DVB-S and DVB-S2 reception and analysis. It is designed to work in conjunction with _MiniTiouner_ hardware, enabling hams to monitor DATV transmissions, including those from the QO-100 geostationary satellite. The resource outlines the initial setup process, including connecting the MiniTiouner hardware via a high-quality USB2 mini cable and running diagnostic test software. It details how to configure essential parameters such as symbol rate (SR), FEC rate, and DVB mode for various signal sources, from domestic satellite dishes to local DATV transmitters. Troubleshooting steps for common issues like "no video displayed" are also provided, often pointing to corrupted software filters or incorrect _Auto PID_ settings. Advanced features like the Web monitor for remote signal reporting and integration with _VLC_ media player for more tolerant decoding of non-DVB compliant signals are covered. The document also references a comprehensive user guide by W6HHC for the _MiniTiouner-Express_ system, which utilizes the same software, offering further in-depth assistance for operators.

Version 0.7 of Open Tuner, released on April 27, 2023, marked a significant milestone by introducing proof-of-concept dual tuner functionality for the BATC Minitiouner. This C# client, inspired by Heather Lomond's _Longmynd_ project, aims to leverage both tuners and demodulators within the NIM module, a capability crucial for advanced Digital Amateur Television (DATV) operations on QO-100 and terrestrial links. My own experience with DATV often involves juggling multiple receive paths, so a unified client like this simplifies the workflow considerably. Further enhancing its utility, version 0.9 (February 11, 2024) integrated support for the Raspberry Pico, utilizing Colin (G4EML)'s _PicoTuner_ firmware. This offers a more accessible and cost-effective alternative to the traditional FTDI module, streamlining dual tuner setups with a single USB cable. The project's evolution reflects a practical approach to overcoming hardware availability challenges. The software is developed using Visual Studio 2019/2022 and .NET Framework 4.7.2, requiring specific Nuget packages like VLC/Websocket and an ffmpeg folder for full operation. It's an active, community-driven effort, with the source code openly available on GitHub for contributions and bug reporting, embodying the collaborative spirit of amateur radio development.