Jerry...
This has really nothing to do with my question. Like you, I usually
run the sliders to display 5 or 6 kHz. Unfortunately this does not
increase the RESOLUTION (sorry, not shouting, just bypassing the
reflector's lack of italics/bold face). I have no trouble seeing the
RTTY and working it, but the mark and space tones are quite far apart in
170-shift 45 Baud RTTY compared to the tones in, say, Throb, which are
only a few Hz apart. Most of the MFSK modes (I mentioned Olivia before)
use a much denser distribution of tones within their bandwidth: Olivia
16/500 (which is the one example I mentioned before) spaces the tones by
31.25 Hz, etc. It would be useful to be able to use the waterfall in
pSDR to distinguish these tones clearly. .
Jerry Flanders wrote:
John, change the amount of spectrum you display. Adjust the two
sliders just below the waterfall/panafall display so you are
displaying maybe +/- 10 KHz. I routinely only view my freq +/- 10 KHz
and have enough resolution to identify signals by their appearance
alone. I routinely click on RTTY sigs and am tuned to within 30-40 Hz
just by clicking, because I can distinctly see both the mark and space
tones (170 Hz apart) and the valley between then . I can also see the
broadening of the lines caused by the shift in PSK, etc. I think that
is what you want.
Jerry W4UK
At 01:34 PM 2/26/2010, John Ragle wrote:
What controls the maximum resolution on the abscissa of the
waterfall view? I understand about FFTs, sampling rates, etc. but
don't understand why the waterfall in pSDR is so muddy compared to,
say, FLDIGI or DigiPan, seeing that they are processing the same
audio stream with their FFTs. I have played at length with the
"Display" controls in Setup without being able to effect any
improvement in the pSDR display.
John Ragle -- W1ZI
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