Frequency Differences for WSPR

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KB3SI
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Joined: 2018/06/19 - 02:34
Frequency Differences for WSPR

When using WSJT on FT8 the frequency shown (3.573 on 80 meters)is what I set the transceiver for and it works fine. However when using WSJT on WSPR I tune the radio to the frequency (USB) as shown in the display (3.56860 on 80 meters) and see no activity. When I tune up to 3.59360 (data USB) on the radio I find the activity on the waterfall. When I look at the frequency shown on the database on WSPRnet the reported frequency is 3.570xxx for the reporting stations.

I am confused as to why I am seeing these different frequencies. I am using an FT-991.