Re: Carbon-13 decoupler calibration

Keith Brown (brownk@skyway.usask.ca)
Sat, 22 Nov 1997 08:43:03 -0600 (CST)

> There is a parameter XL which controls a fixed 3 dB (or 5 dB depending
> on frequency) attenuator in the output of the BSV-10. Is it possible
> the settings in the 2 datasets are different ? XL=0 means attenuator
> is off, any other setting means on.

I have tried varying XL from 0 to 3 but it seems to make no difference
to the results that I get. I still see a 90 degree pulse at 18 usec
regardless of the setting of XL.

>
> The decp90lo problem sounds like you are not on-resonance for 13C.

This is correct. Initially I wasn't on resonance. I have corrected this
and will again try using decp90lo to calibrate the carbon-13 decoupler.

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- Dr. K. Brown brownk@chem4823.usask.ca -
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