CRAMPS 2D
User Manual Version 002 BRUKER BIOSPIN 293 (327)
Data Processing 24.3
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. The pulse program is written such that
the correctly scaled sweep widths are calculated and indicated upon ased. These
values are set as status parameters before transform as indicated above.
sw, swh along F1 Same as for F2. Needs to be corrected before transform pulse pro-
gram calculates approximate values to be set
before transform (ased).
td 512-1k. Depending on resolution.
1 td 128-256. Depending on resolution.
spnam1 wpmlg1, m5m or m5p as
in 1d.
DUMBO may be used with modified timing.
spnam2 lgs-2 or lgs-4 if used. Set l3=2 or 4, depending on desired sw1 DUMBER-
22 with modified timing.
Table 24.2. Phases, RF-levels, and Timings
Phases RF Power Levels Timing
φ
0
= 0, STATES-TPPI pl12 = set for around 100 kHz p1 around 2.5 µsec.
φ
1
= CYCLOPS, 1 2 3 0 pl12 p1
φ
5
= 2
φ
10
= 0 2 sp1,sp2: set for 100-130 kHz RF-
field or pl13 for both set in ppg
WPMLG: calculated via cnst20.
DUMBO: p10 set by xau dumbo.
φ
11
= 0 2 dto. dto.
φ
31
= CYCLOPS, 0 1 2 3 d8 = desired mixing time, 50-1000
µs.
Table 24.3. Processing Parameters
Parameter Value Comment
mc2 STATES-TPPI
wdw QSINE Slight-moderate resolution enhancement is usually required.
Table 24.1. Acquisition Parameters
To Next Page
Loading...