Hi André,
After installing the 2H-Tx, you've calibrated a 2H pulse using that amplifier?
In that case--you've run cf after installing the 2H-TX? Did you run expinstall
to update the topshim setup?
You might be able to find some useful information if you open up a new parameter set
and read in the topshim1d2h parameter set and look at the routing it uses. That
might give you a clue what's not set up properly. You could look in the topshim
log files in <topspinhome>/prog/curdir/<username>/topshim.log and see if there's
anything suspicious there. You could try acquiring a gradient profile using
the parameter set gradshim1d2h (process the result with fmc instead of ft) and see
if you see a broad hump.
Cheers,Mike
On Monday, July 14, 2025 at 01:46:28 PM MDT, Andre Dallmann via groups.io wrote:
Dear all,
I have been (with the support of Bruker) trying to install a 2htx-board
on an three-channel AVI with centos5 and Topspin 2.1.
The cable seems to be correct, however he was complaining that the 2htx
is routed to the 300W amplifier. I have corrected that via the bsms and
routet it to output 4.
Now there are no complaints, I can also do a 3DShim and 1DShim on a
sucrose sample. However, as soon as I want to start topshim on any
deuterated solvent, he aborts with the error "Raw check - no signal at all".
I can measure deuterium, the lock works, so I am pretty sure, it is not
the deuterium per se which does not give a signal.
Anyone any thoughts on this? Bruker seems to be at their wits end on
this either...
Thanks and best, André
--
Dr. André Dallmann
Leiter der NMR-Abteilung
Email: andre.dallmann_at_chemie.hu-berlin.de
Raum: 0'103
Telefon: 82952
Handy: 01797657855
ORCID-ID: https://orcid.org/0000-0002-0141-2635
Webseite: https://www.chemie.hu-berlin.de/en/forschung-en/nmr-spectroscopy/nmr-spectroscopy?set_language=en
Adresse:
Humboldt Universität zu Berlin
Institut für Chemie
AG NMR
Brook-Taylor-Str. 2
12489 Berlin
Deutschland
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Received on Mon Jul 14 2025 - 14:45:20 MST