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.

A tech­ni­cal term for SSTV is nar­row­band tele­vi­sion. Ana­log broad­cast tele­vi­sion requires at least 6 MHz wide chan­nels, because it trans­mits 25 or 30 pic­ture frames per sec­ond (in the NTSC, PAL or SECAM col­or sys­tems), but SSTV usu­al­ly only takes up to a max­i­mum of 3 kHz of band­width. It is a much slow­er method of still pic­ture trans­mis­sion, usu­al­ly tak­ing from about eight sec­onds to a cou­ple of min­utes, depend­ing on the mode used, to trans­mit one image frame.

Since SSTV sys­tems oper­ate on voice fre­quen­cies, ama­teurs use it on short­wave (also known as HF by ama­teur radio oper­a­tors), VHF and UHF radio


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