Thank you, Justin! It indeed relates to aliasing. I have imported my spectra
from Sparky and in the beginning they looked OK. Then I have imported the
peaklist. And at some point, I guess, the values for max/min aliased
frequencies were taken by Analysis from the min/max ppm value present in the
imported peaklist. Since I had an aliased peak (84.744ppm) in the peaklist,
Analysis has chosen this value for the minimum aliased frequency, precisely
as it says in the manual. While the spectrum upfield ppm value is 102.749...
I guess this is a bug.
Cheers,
Vitaliy
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