Bruker BioSpin Solid State NMR, User Manual

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CRAMPS 2D
User Manual Version 002 BRUKER BIOSPIN 299 (327)
Data Processing 24.7
The spectral width in both dimensions assumes the absence of shift scaling. In or-
der to account for the shift scaling effect of the sequence, one has to increase the
spectral width by the scaling factor. Before doing the 2D-fourier transformation,
type
s sw
to call the status parameters for both F2 and F1 and replace both val-
ues by <current value>/0.6. After
xfb
, the relative peak positions will be (approxi-
mately) correct, but the absolute peak positions must be corrected by calibrating a
known peak position to the correct value.
Examples 24.8
These spectra were both taken without the modification according to
"CRAMPS
2D" on page 291
, so the offset is placed to the down field side and the spectrum
width was chosen larger than necessary. The small plots show the full spectrum.
Table 24.6. Processing Parameters
Parameter Value Comment
mc2
STATES-TPPI Or whatever used.
wdw
QSINE Slight-moderate resolution enhancement is usually
required.
ssb
3 or 5
si 2k -4k
1 si 512 – 1k