Dual tone multi-frequency ( DTMF) encoding and decoding.Ability to be used as a KISS modem via TCP/IP port 7342.Connection to external programs via TCP/IP port 7322.Support for transmitting and receiving in all languages by using UTF-8 character encoding (some modes).NBEMS: The narrowband emergency messaging system.Multiple sound systems are supported by Fldigi, allowing the program to abstract the sound card hardware across differing hardware and operating systems. The Fldigi software is written in highly portable C/ C++ and can be used on many CPU architectures, including: Because of this, the software can run on many different operating systems such as:Īdditionally, Fldigi is designed to compile and run on any POSIX compliant operating system that uses an X11 compatible window system / graphical user interface. Portability Operating systems įldigi is based on the lightweight portable graphics library FLTK and the C/ C++ language. Transfer of files, emails, and FEMA ICS forms are possible using inexpensive radio hardware.

Using this software, it is possible for amateur radio operators to communicate worldwide while using only a few watts of RF power.įldigi software is also used for amateur radio emergency communications when other communication systems fail due to natural disaster or power outage.

Increasingly, the software is also being used for data on VHF and UHF frequencies using faster modes such as 8-PSK. Such communications are normally done on the shortwave amateur radio bands in modes such as PSK31, MFSK, RTTY, Olivia, and CW (Morse code). This interconnection creates a 'sound card defined radio' whose available bandwidth is limited by the sound card's sample rate and the external radio's bandwidth. The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively. English, Italian, Spanish, French, German, Polish, Dutchįldigi (short for Fast light digital) is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.

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