After running an 1H-NMR experiment I observed the acetic acid-d4 solvent peaks at 11.54 and 21.16 ppm (off the expected values by ~9 ppm to lower fields).
Is it possible that the lock was made onto the wrong deuterium acetic acid-d4 signal?
Well, you just need to reference the spectrum - they cannot always be automatically referenced (an actually most of the time you need to enter a small correction manually)
On older systems with
Also you might want to check the
edit: actually, I've missed an important point - if the transmitter frequency is set outside the "spectral window" of your compound - let's say just outside one of the edges of the spectrum (say left) - then some peaks from near the right edge will fold over and will show up at the left of your measured spectrum. To check if you have this situation - double the spectral window and see if any peaks move. If they do - move transmitter frequency to the middle of your spectrum.