BPSK31 and QPSK31

Description :
Baud rate : 31.25
Speed : 37 wpm in capital letters and 51 wpm in small letters (average)
Modulation : DBPSK
Receive mode: indifferent (LSB or USB) for BPSK31 only, for QPSK31 USB is mandatory
Character set : ASCII characters + ANSI extended characters + an error reset character (“ Varicode ” characters)
Shape of pulse : raised cosine
Bandwidth : about 80 Hz,
Demodulation : coherent,
Synchronization: automatic using the signal
Correction code: no
Convolution code: no for BPSK31, yes for QPSK31 (Rate=1/2, Constraint length=5, use of Viterbi decoder with soft decison)
Interleaving : no
Automatic Frequency Correction: about +/- 10 Hz depending on signal-to-noise ratio,
Drift tolerance : 1 Hz/sec (depending on level)
Pmean/Ppeak : 0.79 for BPSK31 and 0.35 for QPSK31
Lowest S/N : -11.5 dB
Waterfall range : 200 to 4300 Hz for Multipsk

Note : the BPSK31 mode is very much used, QPSK31 is not used that much.