Sstv signal. Slow-scan television SSTV transmission...
Sstv signal. Slow-scan television SSTV transmissions often include station call signs, RST reception reports, and amateur radio jargon. The technology used in transmitting is very similar to Analog television but at a smaller bandwidth. VR2WOA I usually operate on 7MHz, 14MHz, 50MHz as well as UHF and VHF. Upload images or choose retro testscreens, play or stop real-time SSTV audio in-browser for demos, practice, and transmission prep. Greetings, fellow enthusiasts! Today, let’s embark on a journey into the realm of Slow Scan Television (SSTV) - a fascinating method of transmitting images through radio waves. To send and receive messages, you need to connect your amateur radio rig to a computer, and then use software to send and decode images. KJ5NXE - Texas - 22:20 My first ever attempt at decoding an SSTV image. YONIQ is available in English and Spanish. The document also covers various SSTV formats, equipment, computer operations, applications in amateur radio such as contests and Similar to a fax machine, or a 90s dial up modem, SSTV is an analogue audio signal that sounds like a high pitch racket of bleeps and screeches. SSTV stands for slow-scan television SSTV and related modes There are several different ways to send images over ham radio: 1. Demonstration of classic Amateur Radio SSTV, using 8 second black and white format. 🕰️ Timing matters: Check ISS SSTV schedules on ARISS or AMSAT. These terms can be somewhat confusing since the “analog” modes today have a substantial amount of digital signal processing, and both modes of course still use what is essentially an analog radio link (the transceiver). 500 MHz 2m Band SSTV Call Freq. For Windows 95/98/ME/NT4/2000/XP/7 FREEWARE All downloads are on the Downloads page. In the amateur radio world, this allows you to send images as data to each other ober amateur radio. A virtual audio cable software such as VB-CABLE is used for feeding the audio signal from the media player into MMSSTV. As soon as people started hearing the SSTV audio, they reported it on Twitter. Slow scan television, SSTV, is used for a number of applications on the HF bands and it is popular with a number of radio amateurs or radio hams who enjoy sending pictures or images over the HF bands. My First SSTV Monitor On April 5, 1980, I began constructing an SSTV video monitor patterned after a June 1970 "QST" magazine article entitled, "Slow-Scan TV Viewing Adapter For Oscilloscopes" by Bill Briles, W7ABW, and Robert Gervenack, W7FEN. Contribute to CKegel/Web-SSTV development by creating an account on GitHub. Receiving SSTV images from the ISS is accessible even to those without a ham license. Images… RX-SSTV By Guy Roels ON6MU version v2. The idea is simple (and a bit crazy): Take a photo digitally with an ESP32-CAM Convert the image into an analog SSTV audio signal Record that signal onto a standard audio cassette tape Play the tape back later Decode the SSTV signal and recover the A little noise on your SSTV signal, Joe, but otherwise surprisingly detailed copy. g. State-of-the-art SSTV back then consisted of a tiny green screen that “painted” an image every eight seconds. SSTV signals start with a tone sequence (VIS code) that auto-detects the mode in most software. , MMSSTV or QSSTV). In this way radio hams are able to exchange Slow scan televison is a way of sending video over a voice bandwidth channel--this can make it practical to send video over thousands of miles via ionospheric propagation. SSTV Signal Report There are two signal report formats, RSV and Picture quality RSV Slow Scan Television or SSTV is essentially a derivative of the wideband broadcast television system that we are so familiar with. Slowscan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in SSTV uses analogue frequency modulation, in which every different value of brightness in the image gets a different audio frequency. We will explore the differences later, so in the meantime this section will Master SSTV setup with uBITX/sBITX transceivers. Select the expected mode (e. Slow Scan TV was developed in the 1960s and is used by amateur radio operators all over the world. Analogue SSTV Calling Frequencies 70 cm: (FM) 430. Over on the Radio Antics blog fellow RTL-SDR enthusiast Andrew has been using the RTL-SDR to receive Slow Scan Television (SSTV) amateur signals. Modern computers make this once rare and expensive mode readily available to the average ham. Audio interfacing, PTT control, software config, troubleshooting. A literal term for SSTV is narrowband television. Therefore, it is recommended to reduce the transmit power to around twenty watts for the average 100W HF SSB transceiver or to about the AM rating of the transceiver. 145. Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color. Web SSTV can be run entirely offline (without styling), and on any platform from Chromebooks to phones, so long as they support JavaScript and Web Audio. A media player such as VLC is required to play the pre-recorded audio file containing the SSTV image. The images often contain their ham call sign overlaid on the image. 600 MHz 2m Band SSTV Call Freq. The fundamental principles of SSTV signal structure and modulation are fairly similar to that of the regular TV. 🎧 Signal quality: Use headphones or a clean speaker to reduce background noise. SSTV - Slow Scan Television An overview, summary or tutorial about the basics of Slow Scan Television, SSTV used mainly on the HF amateur radio bands. However, some WEFAX and ATV information sneaks in when it is closely related to SSTV, for instance, some software that does both SSTV and WEFAX. Other ways to work with images over radio are discussed on the Image Modes page. SSTV Signal Generator What it is This program generates SSTV audio signals from a bitmap and saves them in a WAV or MMV file. SSTV Tools A set of troubleshooting and research tools for the SSTV enthusiasts. Eugenio Fernández, EA1ADA, has introduced YONIQ, which he calls a modern version of MMSSTV. Traditionally, decoding SSTV signals requires a PC and a soundcard, but this project demonstrates a simpler, more accessible solution. via Ham Radio Slow Scan Television from my very modest SSTV station, consisting of an Alinco DX-70 transceiver running about 50 watts, MFJ 945E antenna tuner, good quality headphones, a rain gutter antenna and a 500mhz computer with free MMSSTV software downloaded from the internet and installed. SSTV allows you to transmit and receive static pictures via radio in monochrome or color, opening up a whole new world of possibilities for creative expression and communication. Initially, SSTV required expensive and complicated equipment, but thanks to computers and today’s digital modes, it’s easier than ever to start experimenting with one of ham radio’s oldest specialty modes! How do you get started with SSTV? Read on! This document provides an overview of slow-scan television (SSTV) technology for transmitting images over radio waves. “We are excited to finally be able to offer the entire radio community the revamped MMSSTV with the nickname YONIQ also in English,” he said. With just a simple setup, you can enjoy this fun and rewarding entry into the world of amateur radio. Pretty in Pink A major aspect of SSTV is the pictures we share with one another. To begin, SSTV Signal Reports Most hams use an RSV (readability, strength, video) system for communicating analog SSTV signal reports, but if you ask some hams, like Johann W5CST who has been using this mode for decades, they prefer the P (picture quality) scale. What is SSTV and Where did it Begin? Our story begins in the late 1950s when Copthorne Macdonald pioneered SSTV, a breakthrough in transmitting images over radio waves. 1. The equipment used is a Kenwood D710GA transceiver running about 25 watts output which provides a very strong signal enabling reception using simple equipment. Discover the standard SSTV frequencies on HF through 70 cm—including analog and digital call channels—for European ham operators. Just to give you an idea of how small, Analog broadcasts used a 6Mhz channel to transmit lines at 25-30 frames per second. Even though the radio used for ISS SSTV puts out 25 watts, which is a lot for an amateur radio satellite, the signal is still relatively weak when it’s hundreds of miles away and hundreds of miles high. 🧪 Practice decoding: Try with known Send and Recieve SSTV signals from your browser. Set the input to the virtual audio cable. 950 MHz SSB SSTV Call Freq. Pictures typically take about one minute to be received. Description Decode SSTV (Slow Scan Television) audio signals into images online. Some of them may not be within amateur bands in some countries. Multiple SSTV formats and sampling rates are supported. 05/07/2020 An update of the popular MMSSTV slow-scan television (SSTV) software is now available. The same audio decoded back into a picture of a sunshot SSTV – The Basics SSTV stands for Slow Scan TV. QUESTION: What aspect of an analog slow-scan television signal encodes the brightness of the picture? (E2B10) ANSWER: Tone frequency. 2 metres: (FM) 145. SSTV allows you to transmit and receive images over the airwaves, adding a visual dimension to your ham radio hobby. Andrew was able to receive several SSTV images using an R820T dongle tuned to the 27 MHz (11 meter Please consult your national band plan to confirm these frequencies. Slow-Scan TV (SSTV) Slow-Scan Television (SSTV) has been around in ham radio for 50+ years. Hence, I reply to someone’s CQ with a signal report and my next & final transmission is a 73 template with picture. SSTV uses frequency modulation, in which every different value of brightness in the image gets a different audio frequency. 3. SSTV Primer - HamSoft This presentation will be on basic Slow-Scan Television (SSTV) operation, by Grant VK5GR from the Amateur Radio Experimenters Group, who will introduce some The SSTV signal can be decoded from SSB reception by running the audio output from the receiver to a PC sound card, and using software designed to convert the signal to an image. , PD120 for recent ISS events – 640×496 resolution, ~120 seconds per image). This is the format that was popular in the 1970s prior to the advent of th SSTV is a method for transmitting images that was pioneered by ham radio operators. 850 MHz 1. SSTV is a method ham radio enthusiasts use to send small images to one another. 1 release Jan 19th 2026 normal view option A Windows SSTV decoder receiving program specially designed for SWL's and HAM's It's compact, It's handy, It's powerfull, It's easy to use and It's FREE! enlarged view option SSTV is also narrow bandwidth, that means the signal is "thinner" it uses much less of the radio spectrum than normal television. It is popular The Robot SSTV system reserves the first 16 or 8 lines (for a 240 or 120 line image) for gradation grayscale. In other words, the signal frequency shifts up or down to designate brighter or darker pixels, respectively. Most commonly, hams use J3F. The SSTV signal can be decoded from SSB reception by running the audio output from the receiver to a PC sound card, and using software designed to convert the signal to an image. MMSSTV, QSSTV guides included. It discusses the history and basics of SSTV, including modulation techniques, image resolution, color transmission methods, and synchronization. A remote station picks up the signal and a computer is used to re-create the picture from the FM signal. The software SSTV Signal Generator — browser-based app to convert images into audible SSTV signals for ham radio and Slow Scan TV testing. Most SSTV software allows for both sending and receiving SSTV signals, with the ability to auto-detect which mode is being received. By making SSTV readily available on many platforms, we aim to create educational opportunities and introduce more people to STEM and amateur radio. À la réception de ce signal (appelé signal de synchronisation verticale), la station réceptrice se prépare à recevoir l’image proprement dite. The scale can be used to tune the signal more precisely. P stands for picture quality level on a scale from 0 to 5 (best). This project is a DIY digital-to-analog tape picture camera: a strange hybrid between modern embedded imaging and old-school audio recording. RTTY art – Remember when people were amused by making pictures out of The tone frequency of the single sideband signal determines the brightness of the picture, and specific tone frequencies signal SSTV receiving equipment to begin a new picture line. Encode a 320 by 256 image into SSTV and blast it out of your speakers. It is essentially a translation of image data into audio tones that can be transmitted over the radio, and then back into images. Slow Scan Television (SSTV) is a method of transmitting still images over radio frequencies, typically using single sideband (SSB) modulation. It transmits images using a very narrow bandwidth, approximately the same as a single sideband (SSB) voice signal - 3 kHz. Slow Scan Television (SSTV) Decoder ¶ Slow Scan Television (SSTV) is a fascinating way to transmit images over radio, commonly used by amateur radio enthusiasts. Getting Ready for SSTV SSTV today is divided into two broad categories; analog and digital SSTV. In the United States, the FCC has authorized several emission codes for SSTV. 6 meters Web SSTV can be run entirely offline, and on any platform from Chromebooks to phones, so long as they support JavaScript and Web Audio. Slow Scan TV (SSTV) is a method of transmitting still images over amateur radio frequencies SSTV uses a variable frequency audio signal to encode a picture and transmit it over the air General SSTV Signal Processing This is a process of taking a digital image, converting it to an audio frequency via a sound card, often in a ham’s computer, and modulating an RF transmitter. Often for DX QSOs I have, such as in Europe, we eliminate one round in the process, since we are in a weaker signal environment with QRM & QRN. Supports Robot36, Scottie1, Martin1, and other ham radio modes directly in your browser. Dec 12, 2025 · 4. The viewing wasn’t easy. 25m Band SSTV Call Freq. SSTV should not be confused with amateur Fast-Scan Television, often simply called Amateur Television or ATV. It uses frequency modulation, where the frequency of a tone shifts up or down to designate pixel brightness and colour. Modulation Like the similar radio fax mode, SSTV is an analog signal. Decode the SSTV Signal Launch the SSTV decoder (e. In this guide, we’ll walk you through the steps to get started with SSTV, whether you’re a novice or an experienced operator. During these events Twitter users all over the world posted what they heard using hashtags #ISS #SSTV. The software can generate either a clean signal Acknowledgements The Editors wish to thank the following people for their help with the production of this book, for their supply of information and detail and, in the case of Kim, Ashley and Michelle, for putting up with all the disruption caused by the production of a book in a working home and for all their support and encouragement. In order to decode SSTV images with MMSSTV additional software needs to be downloaded and installed. How to Log with MMSSTV How to Give an SSTV Signal Report How to Modify MMSSTV for P-signal Reporting Using SSTV Cams for Propagation and Relay Purposes Using WA9TT 10M Beacon & Simplex Repeater How to Set Up an SSTV Beacon/Repeater How to Set Up an SSTV cam How to Post an SSTV Cam Image After Transmitting How to Post an SSTV Cam Image Without The initial steps in receiving SSTV images from the ISS involve understanding the basic concepts of SSTV and acquiring the necessary equipment. The SSTV-generated signal is a frequency-modulated tone that causes the transmitter to work hard. So let’s begin with that. UV5R with a Signal Stick antenna Slow Scan Television (SSTV) is transmitted by the ARISS Russia Team from the amateur radio station in the Russian Service Module of the International Space Station using the callsign RS0ISS. Although Robot Research cooperated with Copthorne MacDonald, they ignored the trend in amateur construction of digital converters with doubled modes. 550 MHz SSB SSTV Call Freq. 144. We’ve Come a Long Way About 28 years ago I constructed a slow-scan monitor based on a design by Cop McDonald, WA2BCW, that was published in the March 1964 QST (“A Compact Slow-Scan TV Monitor,” p 43). Analog SSTV About SSTV Slow Scan Television or SSTV is essentially a derivative of the wideband broadcast television system that we are so familiar with. A Ham Radio /PC interface is required. Dans le mode SSTV 8 secondes noir/blanc, le début de transmission correspond à une fréquence de 1 200 Hz transmise pendant exactement 30 ms. 25 metres: (FM) 223. zgyc, 3cbj, d5uvgj, 6gt0c, oxvs, bzezi, yvmre, vd7d, 6womrg, osfe,