PSK31 PSK63 & PSK125
This mode is designed for “real time” keyboard operation and at a 31 baud rate is only fast
enough to keep up with the typical amateur typist.
PSK31 enjoys great popularity on the HF bands today and is presently the standard for live keyboard communications.
Since it’s introduction the baud rate has been increased to add a further two sub-modes of PSK63 and
PSK125, having baud rates of 63 and 125 respectively.
PSK31 was one of the first digital sound card modes to be developed and introduced.