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Visit our PSK Contest Calendar for more PSK contests and links to contest results.

Phase Shift Keying  (PSK)

PSK was developed by English amateur radio operator Peter Martinez (G3PLX), and introduced
to the wider amateur radio community in December 1998. Martinez initially called his creation
"varicode", because it uses variable length encodings (Huffman codes) to represent characters.

PSK was enthusiastically received, and has since quickly spread into worldwide use. Due to the efficiency
 of the mode, it has become especially popular with operators who's circumstances do not permit the
 erection of large antenna systems and/or the use of high power.  PSK is not suitable for transporting
computer data like pictures or programs, but intended as a mean of human communication
 between two or more operators in a very simple and thus very robust way.

PSK31 can be compared to CW (Morse Code radio communication), but it is more efficient than CW.
It uses a bandwidth of just 31 Hz with a speed of about 288 LPM or 48 WPM (words per minute).
According to the small bandwidth, the system gain against a CW filter with 500 Hz is 12 dB.
That means a CW transmitter has to output 16 times more power than a PSK31 transmitter to gain
the same signal to noise ratio on the receiving side.

For more information on PSK,  Click Here.





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