Whisper ( WSPR ) and other weak signal softwares

You may watch the WSPR results in real time at WSPRnet.

WSPR (“whisper”)  or Weak Signal Propagation Reporter software.

Dowloads for Windows at          WSPR 2.0      WSPR 2.12 and FMT

This software program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands and forwarding the results to  WSPRnet.

WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions.  Normal transmissions carry a station’s callsign, Maidenhead grid locator, and transmitter power in dBm.  The program can decode signals with S/N as low as -28 dB in a 2500 Hz bandwidth.  Stations with internet access can automatically upload their reception reports to a central database called WSPRnet, which includes a mapping facility.  To see a live version of the map pictured at top right, click here.

WSPR 2.0 User’s Guide

Other Weak Signal software information

WSJT
WSJT-X
MAP65
WSPR
SimJT

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