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Default How long is too long a pulse?

How long is too long a pulse?

I recently calibrated the 90 for 11B on a Agilent 400MR. The 1H 90 was about 6.8us at 59dB... It turns out to be 22.6us for 11B at 59dB. Is this long enough that I should consider upping the pulse power?

More generally, how long is too long a pulse in general?



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