Re: [AMMRL] 400 MHz Avance I data acquisition issue

From: <daveonofrei_at_msn.com>
Date: Tue, 06 Jun 2023 17:36:43 -0700

Thanks for pointing me in that direction Mike. Pulling the gradient cable didn't
affect the signal (which is good because it means the gradient isn't firing
erratically) but then on a whim I pulled the 2H cable as well, and when I
plugged it back in a few moments later, the erratic signal stopped and got
my normal lock signal back. So far it hasn't come back and I can use the
instrument, but I'm not sure what this means about the root cause?

I still get two errors,
1. Occasionally "rcuerror: Scan speed overrides accumulation" which usually
results in partial acquisition and
2. "Topshim fieldmap: signal-to-noise is too low" when using CDCl3 which I
have understand is due to CDCl3 not being a great lock solvent.

Not sure if this gives any insight but it may be that there is more than one
point of failure. Possibly CCU and Lock transmit/receive pathway.


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Received on Tue Jun 06 2023 - 17:36:45 MST

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