Written by N1UZ   

Other Modes

MixW Software

You can work most of these modes in a program called MixW.
MixW is a multi mode multi functional software for every day logging and Contests. It has many useful features that make your QSO logging process almost a 100% automatic procedure.
MixW for digital modes may be used without TNC. The only requirements are a computer running Windows 9x, ME, NT4, 2000, XP, Vista and Windows 7 operating system with compatible soundcard. One of the RigExpert USB interfaces is recommended.
There are many other programs that you can use to run these digital modes, Digipan and Ham Radio Deluxe to name a couple. There are many other programs that can be used. For a complete list go to Eham.net.


PSK31 or "Phase Shift Keying, 31 Baud" is a digital radio modulation mode, used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.
PSK31 was developed and named by English amateur radio operator Peter Martinez (G3PLX) and introduced to the wider amateur radio community in December 1998.
PSK31 was enthusiastically received, and its usage grew like wildfire worldwide lending a new popularity and tone to the on-air conduct of digital communications. Due to the efficiency of the mode, it became (and remains) especially popular with operators whose circumstances do not permit the erection of large antenna systems and/or the use of high power.

Listen to PSK31

To learn more about PSK31 go to N1NKM web page


PSK63 or Phase Shift Keying, 63 Baud, is a digital radio modulation mode and communications protocol for sending data over a radio link. PSK63 can be used by amateur radio operators to conduct real-time text-based chat between locations. PSK 63 is much faster than PSK 31.

To learn more about PSK63 go to QSL.NET web page.


Slow-scan television  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. Broadcast television requires 6 MHz wide channels in North America, because it transmits 25 or 30 picture frames per second, 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.

Listen to SSTV

To learn more about SSTV go to Ham Universe web page.


Hellschreiber or Feldhellschreiber is a facsimile-based teleprinter invented by Rudolf Hell. Compared to contemporary teleprinters that were based on typewriter systems, the Hellschreiber was much simpler and more robust, with only two moving parts. It has the added advantage of being capable of providing intelligible communication even over very poor quality radio or cable links, where voice or other teledata would be unintelligible.

The device was first developed in the late 1920s, and saw use starting in the 1930s. During WW2 it was sometimes used by the German military in conjunction with the Enigma encryption system. In the post-war era, it became increasingly common among newswire services, and was used in this role well into the 1980s. In moderns times Hellschreiber is used as a communication mode by amateur radio operators using computers and sound cards; the resulting mode is referred to as Hellschreiber, Feld-Hell, or simply Hell. Hellischreiber is a very popular mode, you can even join the Hell's Club.

Listen to Hellschreiber

To learn more about Hell go to WM2U web page.


THROB is yet another new DSP sound card mode that attempts to use Fast Fourier Transform technology (as used by waterfall displays). THROB is actually based on tone pairs with several characters represented by single tones. It is defined as a "2 of 8 +1 tone" system, or more simply put, it is based on the decode of tone pairs from a palette of 9 tones. The THROB program is an attempt to push DSP into the area where other methods fail because of sensitivity or propagation difficulties and at the same time work at a reasonable speed. The text speed is slower than other modes but the author (G3PPT) has been improving his MFSK (Multiple Frequency Shift Keying) program.

Listen to THROB

To learn more about THROB go to WM2U web page

That is a small sample of some of the Digital modes available. There is not enough room on this web site nor do we have the time that it would take to write an article about every mode that is available. For that reason we have compiled the following web links that will explain all the Ham Radio Modes.  AC6V Operating modes, WM2U Digital Library


Last Updated on Wednesday, 23 February 2011 18:05

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