Hello Alan,
I have found the explanation for the numbers already ... it's not
the frequency offset, those are the distance to the station with
the call displayed in that line (realized this when I clicked on
the history button). Sorry for this question. Also interesting
somehow when looking at the SNR-figures.
Regarding the VAC: I am using the standard 48khz, only one
virtual cable from SparkSDR to the audio input of WSJT-X (don't
use the same cable for in- and output). The same virtual cable,
however, is not only used in the first but also in the second
virtual receiver. Therefore there is still the question what is
triggering the different behaviour of the HL II (it looks as if
the noisefloor has been reduced significantly) when switching the
2. virtual receiver from DigiL to FT8. Just for info: I have 2
virtual receivers running on this HL II, one in DigiU for
operating with WSJT-X (sometimes JTDX), the second one in DigiL so
that I can easily use RTTY (AFSK) together with WinWarbler (part
of DXLab). Might be this explanation is more precise than my first
mail. As switching the second one to FT8 helps to solve the
problem it is already a work around but it would be helpful to
understand this topic.
Another question: is there any way to get the IQ-data of the HL II from SparkSDR transferred to WSJT-X (or JTDX)? I know that it is possible to feed the IQ-data of each slice of a Flexradio 6400/6600 via DAX to a different device but I have never used it when having the chance to operate the Flex at DA0UP. But when I see the huge difference in SNR figures of FT8 and DigiU with WSJT-X then I believe it is worth to think how to avoid those losses.
73
Juergen, DL8LE
73
Juergen
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