To Reiterate that time: visualize sampling the upper spectrum such which the new sampling price is at 50 % of $f_ s1 $, right in the middle from the "high frequency" spectrum parts we depicted. Meaning then which the spectrum centered concerning this new sampling charge will have to then https://share.evernote.com/note/91c6354d-2887-12d0-6d41-1b26614dcfdf