Slow-scan television (SSTV)

Slow-scan television (SSTV) is a method of displaying images using a slow scanning rate. This is in contrast to regular television, which uses a much higher scanning rate. SSTV is used for transmission of static images, usually of people or artwork, over amateur radio.

SSTV systems were first developed in the late 1950s, and were used for early space missions such as the Apollo program. In more recent years, SSTV has become popular among amateur radio enthusiasts.

There are a variety of different SSTV systems in use, each with its own advantages and disadvantages. The most common SSTV system in use today is the Robot 36 system.

SSTV transmission typically uses a voice frequency (AF) signal, and can be transmitted using any mode of voice communication, including single-sideband, voice, or FM. The signal is modulated using a varicode, which allows for a limited number of pixels to be transmitted.

The receiving station decodes the signal and displays the image on a screen. The image is usually displayed in black and white, but some systems can support color images.

SSTV transmission is relatively slow, taking anywhere from a few seconds to a minute or more to transmit a single image. This is due to the limited bandwidth of the AF signal, and the need to send each pixel of the image individually.

Despite the slow transmission speed, S


SSTV is a mode of transmission used to send images over radio signals. The images are sent as a series of tones, with each tone corresponding to a different color.

There are two different methods of transmitting the tones: USB and LSB. USB stands for "upper sideband," while LSB stands for "lower sideband."

In general, USB is used more often than LSB, because it is less susceptible to interference. However, both methods can be used to send SSTV signals, and it is up to the individual operator to decide which one to use. What is the fastest SSTV mode? The fastest SSTV mode is the Martin M1 mode, which can transmit an image in just under 30 seconds. What is the most common SSTV mode? The most common SSTV mode is the Scottie DX mode. Is ISS transmitting SSTV? Yes, ISS is currently transmitting SSTV. What frequencies can a foundation Licence holder use? Foundation Licence holders in the United Kingdom can use any frequency within the 144-146 MHz, 430-440 MHz, and 1240-1300 MHz amateur radio bands.