2/13/2023 0 Comments Jt65 frequency![]() ![]() When the operator enters a message for transmission, the software produces an audio tone that sounds, to the human ear, like a continuous whistle with a slight warble. ![]() Problems playing this file? See media help.Ī PSK31 operator typically uses a single-sideband (SSB) transceiver connected to the sound card of a computer running PSK31 software. ![]() Due to the efficiency of the mode, it became, and still remains, especially popular with operators whose circumstances do not permit the mount of large antenna systems, the use of high power, or both. PSK31 was enthusiastically received, and its usage spread like wildfire worldwide, lending a new popularity and tone to the on-air conduct of digital communications. ![]() Instead of the traditional frequency-shift keying, the information is transmitted by patterns of polarity-reversals (sometimes called 180-degree phase shifts). The 31 baud BPSK modulation system used in PSK31 was introduced by Pawel Jalocha (SP9VRC) in his SLOWBPSK program written for Motorola's EVM radio. PSK31 was developed and named by English amateur radio operator Peter Martinez ( call sign G3PLX) and introduced to the wider amateur radio community in December 1998.
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