Selecting A Method For Cross Polarization - JEOL JNM-ECA Series User Manual

3 SETTING OF INSTRUMENT CONDITIONS
7.
Perform data processing.
After data processing, the result is displayed by selecting Linearize.
8.
Set up the obs_amp_grad value of Carbon13.
In the spectra for which you carried out Linearize processing, the value of
obs_amp_grad with the strongest signal intensity is the optimum value of cross-po-
larization conditions.
9.
Perform array measurement of Carbon13 to set obs_amp_cp.
3.7.4

Selecting a Method for Cross Polarization

There are several methods for the cross polarization in the CPMAS measurement. You
can change the method by choosing combinations in irr_shape_cp and obs_shape_cp.
Constant CP
RAMP CP
APHH CP
(Adiabatic Passage Hartmann Hahn CP)
ad freq sweep CP
(ADiabatic FREQuency sweep CP)
FM CP
(Frequency Modulation CP)
NICP
(Nuclear Integrated CP)
sadis CP
(Simultaneous ADIabatic frequency
Sweep)
3-12
Refer to the user's manual "Data processing" for processing the data obtained
by the array measurement.
irr_shape_cp
constant_cp
constant_cp
RAMP_cp
constant_cp
APHH_cp
ad_freq_cp
constant_cp
fm_cp
fm_cp
nicp
sadis_cp
nicp
sadis_cp
obs_shape_cp
constant_cp
RAMP_cp
constant_cp
APHH_cp
constant_cp
constant_cp
fm_cp
constant_cp
fm_cp
constant_cp
sadis_cp
NMECAXS_V50-SLD-2