Hi folks
We have an AMX-II 500 which we recently upgraded to a SGI O2
running XWINNMR 2.6
which is exhibiting a strange problem on long term data collection. I we
collected a C-13 overnight
and due a tr transfer at regular points throughout the aquisition we can
see the signal to noise grow to a max and then start decaying, depending
on when we see stop the aquisition we may or may not have any signal left.
Our other AMX -500 configured the same way running Xwin-2.6 does not show
t his behavior nor does our DRX-500 running Xwin 2.6 show this problem
;Bruker has sent us replacement 451 receiver unit ;HPPR pre amp, ;top hat
for HPPR; X- amplifier none of which have solved the problem. My next
guess is to replace digitizer, and buffer boards.
Has anyone seen a similar problem or have any good guesses of where
to go next
Thanks
George
George T Furst;Ph.D.
Department of Chemistry
University of Pennsylvania
Philadelphia,Pa 19104-6323
phone: 215-898-3407
fax: 215-8985129
email: furst@sas.upenn.edu
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