On 28/09/2023 12:51, Rob Giuliano via groups.io wrote:
?? I downloaded the latest WSJT-X
If WSJT-X is used to RX FST4W it can show the spectral width of received signals.
To get it to do this an empty file just named "plotspec" is placed in the working directory. In Windows usually the "bin" folder. See picture.
A good local transmission should show 0.005. This is Hz, we are talking fine measurements.
This figure gives clues about the number of ionospheric hops. One hop maybe 0.050, more hops larger figures.
There are not too many FST4W TX stations, receive yourself may be the only way to get a quickish idea of how good your system is. I am lucky to have a GPS disciplined QDX (G3ZIL) 20Km away, usually ground wave.
73 Alan G4ZFQ
