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WSPR OPERATIONAL FREQUENCIES
Operational WSPR frequencies.

Note that all channels use the upper sideband.

Band (Mtr) Dial Frequency (MHz) Lower Band Pass Frequency (MHz) Upper Band Pass Frequency (MHz) Band Width (Hz)
33400m 0.0072 0.0087 0.0089 200
2200m 0.1360 0.1374 0.1376 200
600m 0.4742 0.4756 0.4758 200
160m 1.8366 1.8380 1.8382 200
80m 3.5926 3.5940 3.5942 200
60m 5.2872 5.2886 5.2888 200
40m 7.0386 7.0400 7.0402 200
30m 10.1387 10.1401 10.1403 200
20m 14.0956 14.0970 14.0972 200
17m 18.1046 18.1060 18.1062 200
15m 21.0946 21.0960 21.0962 200
12m 24.9246 24.9260 24.9262 200
10m 28.1246 28.1260 28.1262 200
6m 50.2930 50.2944 50.2946 200
4m 70.0910 70.0924 70.0926 200
2m 144.4885 144.4899 144.4901 200

Channel bandwidth used is 6 Hz and the transmission time is 110.6 sec. The length of a single tone is 0,6827 s and maximum allowed drift is about 1 Hz.

More information and databases are at WSPRnet.org

References:

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.
http://physics.princeton.edu/pulsar/K1JT/wspr.html

 

Also see related pages:

Computer to Radio Soundcard Interface Computer Sound-card Interface.

 

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Page last revised 01 March 2017  
 

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