Hello,
I had also troubles with the GAB board.
ha -> bsms -> gradients -> Gradient Amplifier Control
there on the control panel - are some buttons. There you can set the Gradient unit ON or OFF.
On the next page - you can do some diagnostic tests and Resets.
This helped me a lot. Or you can update the firmware for the GAB-Boad.
Via the BSMS Service Tools you can look, if the whole BSMS rack is OK or something is old.
Also you can easily access there the Firmware update routine for the GAB-Board, too.
gab2_fpga_00-013-02.bit is my actual firmware for the GAB/2 board.
The worst case is - the gradient is broken in the probe. There is a big round plug
outside of the probe.
This is the gradient plug. There you can easily measure the contacts through the
gradient. There should be a stable resistive value.
If it is broker - there are all contacts at 0 Ohm.
Yours sincerely,
Ulrich Haunz
Am Dienstag, Juli 02, 2024 21:02 CEST, schrieb "Bob Berno" <bberno_at_mcmaster=
.ca>:
> Hello Anne,
>
> I have seen this and similar errors a few times in the past. On a few
> occasions it was a problem with the gradient circuit in the probe, and
> once it was due to a failure in the GAB board.
>
> From your symptoms, I think you have a problem with the GAB board.
> Do you know if the gradients work in any other experiments?
> What happens when you try to run an experiment with uses pulsed field
> gradients (PFGs) for coherence selection (most 2D experiments will be
> setup to use PFGs by default)? Do you see the lock level go down and
> then recover as the experiment runs?
>
> Good luck,
> Bob.
>
> On 2024-07-02 2:06 p.m., Anne Carroll via groups.io wrote:
> >
> > Hello,
> > Please let me know if you have encountered this issue and how your
> > resolved it.
> >
> > In TopSpin 3.6.2, the issue manifests this error "TopshimRawCheck -
> > the Z gradient does not work" whenever we run gradient shimming.
> > Non-gradient shimming (topshim tune) runs fine. There is nothing wrong
> > with the probe.
> > When I reboot the Gradient Amplifier Board GAB/2 from the Service
> > Page, I hear a click and the Ready light on the board turns green. If
> > I Refresh the web service page while the light is green, the Board
> > State claims 'Operation.' Within a few seconds, I hear another click
> > and the Ready light goes out. Now the Refresh shows 'GAB_Error.'
> >
> > Thank you,
> > Anne Carroll
> >
> > --
> > Anne M. Carroll, Ph.D. (she/her) NMR/MS Instrumentation Specialist
> > Department of Chemistry and Biochemistry Miami University Oxford, Ohio
> > USA513-529-3163 Office 678-637-6739 Cell carrol50_at_miamioh.edu
> >
>
> --
> Dr. Bob Berno
> Manager, NMR Facility
> McMaster University, ABB-156
> 1280 Main St. West
> Hamilton, ON L8S 4M1
> T: 905-525-9140 x24158 or x24686
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--
=========================
Ulrich Haunz, Dipl.-Ing. (FH)
NMR-Spektroskopie
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