Bruker BioSpin Solid State NMR, User Manual

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CRAMPS 1D
User Manual Version 002 BRUKER BIOSPIN 277 (327)
Figure 22.3. Shape for DUMBO, sp1
Analog and Digital Sampling Modi 22.3
AV3 instruments allow different acquisition modi, one which resembles the previ-
ous mode of analogue filtering in so far as the down-conversion is done without si-
multaneous digital filtering, whereas the digital mode always down converts and
filters simultaneously. Remember that at a standard sampling rate of 20 MHz (the
fixed sampling rate of the DRU) down-conversion must be done to obtain data
sets of reasonable sizes. The pulse programs dumboa and wpmlga are written for
the pseudo analog mode without digital filtering,
dumbod
and
wpmlgd
are written
for the digitally filtered mode.