DominoEX is a family of offset incremental multi-frequency shift keyed modes with low symbol rate. A single carrier of constant amplitude is stepped between 18 tone frequencies in a constant phase manner. As a result, no unwanted sidebands are generated, and no special amplifier linearity requirements are necessary. The tones change according to an offset algorithm which ensures that no sequential tones are the same or adjacent in frequency, considerably enhancing the inter-symbol interference resistance to multi-path and Doppler effects.

{play}http://www.pa4rm.com/attachments/067_DominoEx-4.mp3{/play} DominoEx-4 test sample
{play}http://www.pa4rm.com/attachments/067_DominoEx-8.mp3{/play} DominoEx-8 test sample
{play}http://www.pa4rm.com/attachments/067_DominoEx-16.mp3{/play} DominoEx-16 test sample