Basic Setup Procedures
User Manual Version 002 BRUKER BIOSPIN 83 (327)
Note: No line broadening is applied since the acquisition time is set appropriately.
Figure 4.26. Glycine Spectrum with Spinal64 Decoupling at 93 kHz RF field
Here, the line width of the line at 43 ppm is fitted to be about 50 Hz: Correspond-
ingly, the intensity is much higher. The sinocal routine calculates 80:1 S/N, using
250 to -50 ppm spectrum range, 50 to 40 signal range and 10 ppm noise range.
On this triple probe, more than 100:1 is expected. What else needs to be opti
-
mized? Two more parameters are essential:
1. The power level at HH contact
2. The decoupling pulse pcpd2.
Table 4.2. Processing Parameters for the Glycine S/N-Test
Parameter Value Comment
SI 2-4 k Twofold or fourfold zero filling.
WDW No No apodization used for S/N measurement In this case.
PH_mod Pk Phase correction if needed.
BC_mod Quad DC offset correction on FID.
FT_mod Fqc
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