Dear colleagues,
Turning off the lock seems a trivial issue. Sadly I could not run a spectrum unlocked successfully on my AV 500, which is topspin 2.0 and comes along a BSMS keyboard.
The following is what I do:
First, I collect one routine 1H spectrum with the lock on using the 1H line shape sample, and it looks fine;
Second in the ACQUPARS menu set LOCNUC = off; on the BSMS keyboard turn off the LOCK ON, and stop the SWEEP. Both LOCKON and SWEEP lights are off. The lock line in the LOCKDISP goes down to the bottom but still scans back and forth.
Third I collect again a 1H spectrum unlocked. If NS=1 the spectrum looks fine; NS>1 then multiple peaks show up for the singlet of CHCl3. It seems to me that the lock is off but the sweep function still works. Disconnecting the lock cable doesn’t help.
Forth I open the BSMS Control Suite and try to turn off the LOCKON and SWEEP there, but it doesn’t help.
Finally I run a similar 1H spectrum unlocked on a Varian MR400 and it works easily and successfully.
I appreciate your help and look forward to your solutions or suggestions.
Guangyu
Received on Fri Jun 08 2018 - 01:17:29 MST