James Moritz wrote:

[...]
Most of the problem with frequencies seems to be due to the 3 1/2 Hz
bandwidth that Argo has when used in 60s dot mode, which is a bit
restrictive.
[...]

Argo, in the sake of maximum resolution, uses rigidly one screen pixel for
each FFT bin. That's why with QRSS60 the span shown is only 3.5 Hz.
I could resample spatially the waterfall to have more Hz displayed, but
I am not sure it is a good idea, resolution-wise...

73  Alberto  I2PHD