HDSDR is a freeware Software Defined Radio (SDR) program for Microsoft Windows 2000/XP/Vista/7/8/8.1/10.

Typical applications are Radio listening, Ham Radio, SWL, Radio Astronomy, NDB-hunting and Spectrum analysis.

HDSDR (former WinradHD) is an advanced version of Winrad, written by Alberto di Bene (I2PHD).

Main features:

separate large spectrum and waterfall display for input and output signals

RF & AF spectrum and waterfall is optically zoomed to fit window width independently of FFT resolution bandwidth (RBW)

flexible and efficient usage of the screen area from 640x480 (Netbooks) up to 8k

extreme low-speed waterfall - helpful for pattern noise detection or short wave condition monitoring

AM, ECSS, FM, SSB and CW demodulation

basic transmit (TX) functionality in modes SSB, AM, FM & CW

I/Q modulated signal pair for the TX input signal (Microphone) is produced on the TX output

squelch, noise reduction, noise blanker, adjustable band pass filter, anti-alias filter

automatic notch filter and up to 10 manual adjustable notch filters

record and playback RF, IF and AF WAV files with recording scheduler

Frequency Manager for Eibi, Ham Bands, Radio Bands, User frequency lists

DDE client for Ham Radio Deluxe, Orbitron, WXtrack, SatPC32, Wisp and PstRotator (Howto)

Omni-Rig support (CAT) to control additional hardware

support for various hardware through Alberto's (I2PHD) ExtIO DLL interface

ExtIO frequency options for IF-Adapter, Upconverter, Downconverter, Undersampling and calibration

All HDSDR program options can be stored and loaded per "profile", to ease use of different receivers

autocorrelation and cepstrum display for demodulated audio

some command line options with profile management



*** Many thanks to all helpers and beta tester! Good work! ***

HDSDR v2.80 installer with OmniRig V2 support. (March 19, 2020)

HDSDR v2.80 installer with OmniRig V1 support. (March 19, 2020)