Description:

Fldigi is a software modem for Amateur Radio use. It is a sound card based
program that is used for both transmitting and receiving data in any of the
following modes:

BPSK and QPSK 31, 63, 125, 250 (both), and 63F and 500 (BPSK only)
PSKR 125, 250, and 500
CW speeds from 5 to 200 wpm
DominoEX 4, 5, 8, 11, 16 and 22; also with FEC
Hellschreiber Feld Hell, Slow Hell, Hell x5/x9, FSKHell(-105) and Hell 80
MFSK 4, 8, 11, 16, 22, 31, 32 and 64; most with image support
MT63 500, 1000 and 2000
OLIVIA various tones and bandwidths
RTTY various baud rates, shifts, nbr. of data bits, etc.
THOR 4, 5, 8, 11, 16 and 22
Throb and ThrobX 1, 2, and 4
WWV receive only - calibrate your sound card to WWV
Frequency Analysis receive only - measure the frequency of a carrier

Fldigi can also control a transceiver using Hamlib or RigCAT I/O, perform online
or cdrom QRZ queries, log QSOs with the built-in logbook or Xlog, and send
reception reports to the PSK Automatic Propagation Reporter.