Hi David,
Your MAS rate is beginning to sound like a communications error. Did you go
through cf after rebooting the computer?
Martha
On Mon, Feb 10, 2025 at 2:42 PM daveonofrei via groups.io wrote:
> Hello all,
>
> I'm running into an issue with spin detection on two of my Bruker MAS
> probes. One is a 4mm HX and the other is a 3.2mm HCP probe. We have 4 MAS
> probes total, and they all seem to spin just fine when measured by
> oscilloscope plugged into the back of MAS III unit. However, the two
> previously mentioned probes are not detected in the either the maspdisp in
> topspin or the web page interface. The two probes that are detected are a
> 1.9mm HCN and a 3.2 HCN probe. The HCN is particularly strange since it is
> the exact same style of probe as the HCP that cannot be detected.
>
> Tech specs:
> Topspin: 3.7.0
> Console: AVIII HD
> MAS firmware: 20240830_1845
>
> We've tried the dumb things (restart topspin, power cycle MAS controller,
> restart computer, restart console, etc).
>
> We've tried a looking at the actual fiber optic cables that run into the
> spin detection on the probes. One of them was a loose connection, so I
> removed the collar, pushed it in further and re-tightened the collar. Still
> no detection. All the firmware is (as far as I can tell up) up to date and
> there is no noticeable damage to the probes themselves.
>
> Has anyone experienced this? It sure looks like a software issue to me,
> since all probes actually do spin (and stably at that) but for some reason
> topspin can't detect them.
>
>
> Best,
> David O.
>
>
> -------
>
> David Onofrei, PhD
> NMR Facility Manager
> Chemistry Department
> San Diego State University
> work: chem-nmr_at_sdsu.edu
> personal: donofrei2_at_sdsu.edu
>
--
Martha Morton, PhD
Director of Research Instrumentation, University of Nebraska Lincoln
Safety Co-Chair, Department of Chemistry
Nebraska ACS, Chair 2021
ACS, MWRM Chair 2021
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Received on Mon Feb 10 2025 - 13:48:25 MST