Well folks,
I've seemingly bricked out 2h gradient performance when attempting to upgrade
TS 2.1 to TS 3.6.5 (CentOS / AV III nano). In this case we are receiving a
topshim raw check - no signal at all
In a nutshell:
1. we are able to acquire a 1D 2H (zg2h)
2. we are able to topshim 1h
3. We are able to make a new shimmap
4. 1D 1H and 1D 13C both are OK
5. I can manually shim to lineshape spec
In this case, we installed and ran nmrrestore to bringing out tar file. Then
cf / ii / ii restart to clear any issues. Then checked prosol table and
edited with previous values accordingly.
At first we were not able to get a good shim response (shimming iterated many
times and set to poor values, complained of poor signal:noise, which in
retrospect may have been related a conversion from dB to dBm in prosol).
Still, we did not get a raw check no signal at all error.
We then though (perhaps unwisely) that there was an issue with the shimmap
and performed a 'topshim initial'.
--> at this point we were no longer able to get a 2H response in topshim.
1D 2H is OK, so is 1h gradient shimming.
--> seems like the routing is messed up
Routing is as follows:
1H --> SGU2 --> 60W amp
2H --> SGU1 --> 100W amp
5W amp is available, but unused.
I have no idea what to do; we reverted to the older computer running TS 2.1,
ran an nmrrestore and went through requisite cf's; all to no avail.
Any advice out there?
cheerios,
Darcy
_________________________________
Darcy C. Burns, Ph.D.
Manager, CSICOMP NMR Facility
NEW BOOK! Optimizing NMR Methods for Structure Elucidation (Burns and Reynolds)
PURCHASE at
https://pubs.rsc.org/en/content/ebook/978-1-78262-539-1
University of Toronto
80 St. George Street
Toronto, ON
M5S 3H6
ph: (416)-978-0448
fax: (416)-978-8775
https://sites.chem.utoronto.ca/csicomp/
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Received on Fri Sep 01 2023 - 17:58:05 MST