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: CW speeds from 5 to 200 wpm DominoEX 4, 5, 8, 11, 16 and 22 Hellschreiber Feld-Hell, FSK-Hell and FSK-Hell 105 MFSK 8 and 16; images can be sent and received in MFSK-16 mode BPSK and QPSK 31, 63, 125, and 250 Throb and ThrobX 1, 2, and 4 OLIVIA various tones and bandwidths RTTY various baud rates, shifts, nbr. of data bits, etc. 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-2.x.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