Hi Shawn,
you should normally have a "19F decouple" autocalibration under "F19 obs/dec"
which should give you pwx/pwxlvl/pwxlvl_cf for 19F. The WURST40 sequence is
then generated on-the-fly based on this calibration.
For the 1H decoupling shape (should also be a WURST40, not WALTZ) a correct
calibration of pp/pplvl and compression factor is required.
Cheers
Bert
> Am 28.07.2025 um 23:27 schrieb Shawn Wagner via groups.io:
>
> Thanks Bert,
>
> You are correct! I can use the 1H-19F sequences and disregard the chan2 label.
> I was able to acquire 19F with 1H decoupling after adjusting the 1H decoupling
> power slightly. I could also get a 1H spectrum with 19F decoupling if I used a
> WALTZ decoupling centered on the 19F nuclei frequency, but the WURST default
> sequence was ineffective.
>
> Any insights as to anything special that needs to be done to make the WURST
> decoupling work would be helpful. Is that something that has to be added to
> the probe file for the sequence powers to calculate correctly?
>
> Shawn
>
>
> From: main_at_ammrl.groups.io on behalf of Baas, Sander via groups.io
> Sent: Thursday, July 24, 2025 2:16 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] 19F and 1H single channel HOESY (Varian)
>
> Hi Shawn,
>
> Thanks for clarifying.
>
> I think Bert and I both mean you will get both the 1H and 19F pulses out
> of the amplifier high band channel. The VNMRS console has an internal
> splitter/combiner which can route PTS channels 1 and 2 towards a single
> amplifier high band channel. If the probe you use has a single coil/RF
> connector for 1H and 19F, which is tuned for both frequencies, your
> experiment should run fine. The VNMRS knows it doesn't have a second high
> band channel and will route all 1H and 19F pulses through Amp 1 Channel 1
> (high band), even when running 2D 1H/19F experiments.
>
> In this case, there is a difference in PTS channels and amplifier channels.
> PTS will use channel 1 and 2, the amplifier will only use channel 1 (high band).
>
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Received on Mon Jul 28 2025 - 17:31:27 MST