FLDIGI Digital Modes Software

FLDIGI handles a wide range of Amateur Radio digital modes and runs on Windows W2K, XP, Vista and Linux.

It is a computer program intended for Amateur Radio Digital Modes operation using a PC and operates in conjunction with a conventional HF SSB transceiver connected to the input and output sockets of the PC sound card. A serial port connection is used for rig control.

FLDIGI is multi-mode, which means that it is able to operate many popular digital modes without switching programs, so you only have one program to learn. It includes all the popular modes, such as DominoEX, MFSK16, PSK31, and RTTY.

Beginners' Guide to FLDIGI
http://www.w1hkj.com/beginners.html

FLDIGI Download page
http://www.w1hkj.com/Fldigi.html