Run frequency measurement tests and calibrate a sound card to a signal. Use serial port connections to control the radio, select between different digital modes, work with CW, PSK, MFSK, RTTY, FM, AMS, LSB, Hell, DominoEX, Olivia, and Throb types, and log data.
Fldigi 4.2.4 was available as a free download on our software library. Fldigi works fine with 32-bit versions of Windows XP/XP Professional/Vista/7/8/10/11. The following versions: 4.1, 4.0 and 3.2 were the most frequently downloaded ones by the program users. The program's installer is commonly called fldigi.exe. Our built-in antivirus checked this download and rated it as virus free. The software is included in System Utilities. The actual developer of the free software is David Freese.
From the developer:
Fldigi is a modem program for most of the digital modes used by radio amateurs today: CW, PSK, MFSK, RTTY, Hell, DominoEX, Olivia, and Throb are all supported. It can help calibrate a sound card to a time signal and do frequency measurement tests.
You may want to check out more software, such as Fldigi-DXLabs Gateway, FldigiDXCluster or flrig, which might be similar to Fldigi.
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