Fldigi
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| Developer(s) | Dave Freese (W1HKJ), et al. |
|---|---|
| Initial release | 2007 |
| Repository | |
| Written in | Fltk (GUI), C, C++ |
| Operating system | Windows, OSX, Linux, Android, FreeBSD[1] |
| Available in | English, Italian, Spanish, French, German, Polish, Dutch |
| Type | Amateur radio and DSP |
| License | GPL version 3.0 |
| Website | Sourceforge 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]
- VOA Radiogram
- Radio Havana Cuba
- Radio Moscow
- Radio Berlin International
- Radio Australia [6]
- Radio Miami International
- WBCQ (SW) [7]
- Mighty KBC [8]
The software is also utilized by amateur radio organizations for both routine and disaster/emergency relief services.
See also
- Amateur Radio
- Shortwave Radio
- VOA Radiogram
- WSPR
- American Radio Relay League
- Sights and sounds of digital modes
External links
References
- ^ "Beginners' Guide to Fldigi". w1hkj.com.
- ^ "Documentation/FAQ – fldigi". fedorahosted.org.
- ^ How Do I Decode a Weather Facsimile (WEFAX) Off of my Shortwave?
- ^ FreeBSD port
- ^ International Broadcasters Reconsider Shortwave
- ^ Radio Australia transmitting digital radiograms this weekend, June 8 – 9
- ^ http://swling.com/blog/2012/05/decoding-wbcqs-digital-message/
- ^ http://swling.com/blog/tag/fldigi/
- ^ W1HKJ honored for fldigi
- ^ http://www.w9tca.com/w9tca/NBEMS
- ^ http://groupspaces.com/BCARES/pages/fldigi-and-nbems
- ^ http://www.arrl.org/nbems
- ^ http://www.obriensweb.com/fldigiemcomm.html
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