Ken,
That is one reason I recommend using the OP1 filter (set the same as the
SSB FL1) for the RTTY FL1 setting. I make the RTTY FL2 thru FL4
settings narrow enough that there is no significant passband ripple (I
typically use 1.00, 0.70, and 0.40 centered at 1000 Hz).
In use, one would tune the desired signal with the VFO to the vicinity
of 1000 Hz in the waterfall display and then proceed as normal from
there (except that I 'lock the transmit frequency' in the PSK31
application so the QSO does not 'walk the band' due to the slight
difference between the transmit BFO and the BFO for the filter in use.
73,
Don W3FPR
Ken Kopp wrote:
Slightly related ... I note see four distinct "gain peaks" in the
waterfall
display of my PSK-31 program(s) when using wider filter settings.
I assume is is a product of the crystal filter's "ripple'.
73! Ken Kopp - K0PP
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