Thank you very much to all of you for your feedback and suggestions. It
seems the problem is with detector and we have placed the service request
for it to get that fixed.
Thanks
Prashansa
On Tue, Jun 13, 2017 at 6:11 AM, Simon Barrett <S.A.Barrett_at_leeds.ac.uk>
wrote:
> Hi Prashansa,
>
> Is the spike exactly in the middle of the acquisition? If
> it is, it’s probably a Quad spike caused by a DC offset of one channel with
> respect to the other used in quadrature signal detection. In GS mode if you
> display the FID signal and click on the two fids button it should show them
> side by side if there is a DC offset of one to the other then check the
> BASH manual on how to minimise Quad spikes for your instrument.
>
>
>
> Best regards, Simon.
>
>
>
> Simon A. Barrett.
>
> School of Chemistry,
>
> University of Leeds,
>
> Leeds.
>
> LS2 9JT.
>
> UK.
>
> Office room 1.20 - NMR lab G.05-07
>
> Phone: +44 (0)113 343 6435 <+44%20113%20343%206435>
>
>
>
> *From:* Prashansa Agrawal [mailto:pxa147_at_case.edu]
> *Sent:* 09 June 2017 15:55
> *To:* AMMRL <ammrl_at_ammrl.org>
> *Subject:* AMMRL: unusual signal in NMR spectra
>
>
>
> Dear Group,
>
>
>
> My users are observing a very noisy signal at 6 ppm in every spectra they
> are acquiring, and even with the empty tube that signal is still there
> (spectra attached). I checked the probe (thinking may be someone has
> spilled any sample or broke nmr tube inside but did not saw anything like
> this.
>
>
>
> Does anyone has any suggestions on it from what it could be.
>
>
>
> Thanks
>
> Prashansa
>
Received on Tue Jun 13 2017 - 03:39:23 MST