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Fldigi

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Fldigi
Developer(s)Dave Freese (W1HKJ), et al.
Initial release2007
Repository
Written inFltk (GUI), C, C++
Operating systemWindows, OSX, Linux, Android, FreeBSD[1]
Available inEnglish, Italian, Spanish, French, German, Polish, Dutch
TypeAmateur radio and DSP
LicenseGPL version 3.0
WebsiteSourceforge Page

Fldigi, the Fast Light Digital modem application,[2] is an open source program which allows an ordinary computer's sound card to be used as a simple two-way data modem. The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB transceiver or an FM two way radio to the computer's headphone and microphone connections, respectively.

Such communications are normally done on the shortwave amateur radio bands in modes such as PSK31, RTTY, Olivia, and CW (morse code). Increasingly the software is also being used on VHF and UHF frequencies.

Using this software, it is possible for amateur radio operators to communicate worldwide while using only a few watts of RF power. Additionally the software is used for two-way emergency communications when other systems fail.

Digital Modes Supported

Mode Name Speeds Supported Custom Modes
Morse Code / CW 5 - 50 words-per-minute Yes
BPSK 31, 63, 63F, 125, 250, 500, 1000 No
FSQ 2, 3, 4.5, 6 No
IFKP 0.5, 1.0, 2.0 No
Contestia 4/125, 4/250, 8/250, 4/500, 8/500, 16/500, 8/1000, 16/1000, 32/1000, 64/1000 Yes
DominoEX 4, 5, 8, 11, 16, 22, 44, 88 No
Hellschreiber Feld Hell, Slow Hell, Feld Hell X5, Feld Hell X9, FSK Hell, FSK Hell-105, Hell 80 No
MFSK 4, 8, 11, 16, 22, 31, 32, 64, 64L, 128, 128L No
MT63 500S, 1000S, 2000S, 500L, 1000L, 2000L No
Navtex Navtex No
Olivia 4/250, 8/250, 4/500, 8/500, 16/500, 8/1000, 16/1000, 32/1000, 64/2000 Yes
QPSK 31, 63, 125, 250, 500 No
8PSK 125, 250, 500, 1000, 125FL, 250FL, 125F, 250F, 500F, 1000F, 1200F No
PSKR 125R, 250R, 500R, 1000R No
RTTY 45.45/170, 50/170, 75/170, 75/850 Yes
THOR 4, 5, 8, 11, 16, 22, 25x4, 50x1, 50x2 100 No
SITORB SitorB No
Throb / ThrobX 1, 2, 4   /   X1, X2, X4 No
WEFAX IOC576, IOC288[3] No

Hardware

It is based on the portable graphic library FLTK, and can therefore run on several hardware platforms such as :

Notable users

Following successful tests by the Voice of America's VOA Radiogram, international and government shortwave broadcasters began testing and experimenting with digital data over shortwave broadcast channels. [5]

The software is also utilized by amateur radio organizations for both routine and disaster/emergency relief services.

See also

References

  1. ^ "Beginners' Guide to Fldigi". w1hkj.com.
  2. ^ "Documentation/FAQ – fldigi". fedorahosted.org.
  3. ^ How Do I Decode a Weather Facsimile (WEFAX) Off of my Shortwave?
  4. ^ FreeBSD port
  5. ^ http://www.radioworld.com/article/international-broadcasters-reconsider-shortwave/271847
  6. ^ http://swling.com/blog/2013/06/radio-australia-transmitting-digital-radiograms-this-weekend-june-8-9/
  7. ^ http://swling.com/blog/2012/05/decoding-wbcqs-digital-message/
  8. ^ http://swling.com/blog/tag/fldigi/
  9. ^ http://www.kb6nu.com/w1hkj-honored-for-fldigi/
  10. ^ http://www.w9tca.com/w9tca/NBEMS
  11. ^ http://groupspaces.com/BCARES/pages/fldigi-and-nbems
  12. ^ http://www.arrl.org/nbems
  13. ^ http://www.obriensweb.com/fldigiemcomm.html


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