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 FSQ Hellschreiber Feld Hell, Slow Hell, Hell x5/x9, FSKHell(-105) and Hell 80 IFKP 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. The latest version can always be found at: http://www.w1hkj.com/ Visit this page for extensive documentation and an archive of XML files for transceivers supported by RigCAT. The wiki page contains FAQs and HOWTOs, as well as links to all Fldigi resources: https://fedorahosted.org/fldigi/ The GIT repository can be found at: https://sourceforge.net/p/fldigi/fldigi/ci/master/tree/ For support, news and updates, join one or more of the following mailing lists and Yahoo groups. Stable releases are announced to all lists and groups; test (alpha) releases are announced to fldigi-alpha and fldigi-announce. * linuxham group General discussion on fldigi, related software and other ham radio topics https://groups.io/g/linuxham * win-fldigi group For Windows users of fldigi https://groups.io/g/winfldigi * NBEMSham group Special focus on NBEMS operation https://groups.io/g/nbems * fldigi-alpha list Discussion of fldigi testing and related subjects https://sourceforge.net/p/fldigi/mailman/fldigi-alpha/ * fldigi-devel list Fldigi development topics https://sourceforge.net/p/fldigi/mailman/fldigi-devel/