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, and 250 CW speeds from 5 to 200 wpm DEX 4, 5, 8, 11, 16 and 22 DominoEX 4, 5, 8, 11, 16 and 22 Hellschreiber Feld Hell, Slow Hell, Hell x5/x9, FSKHell(-105) and Hell 80 MFSK 8 and 16; images can be sent and received in MFSK-16 mode 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, and log QSOs with fl_logbook or xlog. The latest version can always be found at: http://www.w1hkj.com/Fldigi.html Visit this page for extensive documentation and an archive of XML files for transceivers supported by RigCAT. Join the linuxham Yahoo group for support, news and updates on W1HKJ software: http://groups.yahoo.com/group/linuxham/join