Hi Bill and Joe - I was just playing around with WSPR-2 mode while becoming familiar with a new radio. The radio isn’t yet connected to an external reference, so I decided to use WSJT-X’s frequency-offset correction capability to correct a 4 Hz offset on 30m WSPR-2. In the Frequencies tab of the preferences, I entered the 0.4ppm slope into the B box, leaving A=0. This didn’t make any difference in the waterfall display, nor did it change the reported frequencies in the printed decodes. The frequency correction was applied only after I activated the Tune button, at which time it looks like it sent an offset frequency to the radio. When I disabled Tune, I could see the jump in the waterfall indicating that the frequency correction was being applied to the displayed signals. Is it supposed to be necessary to transmit in order to get the frequency correction to “take"?
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