Setting Of Instrument Conditions - JEOL JNM-ECA Series User Manual

INSTRUMENT CONDITIONS
Chapter 3 explains the methods for setting the measurement conditions that are dependent on
the instrument.
Basic measurement conditions are preset to suitable values at delivery time. However, if a
long time passes and the state of the instrument changes, the preset values may shift and the
signal and noise ratio may decrease. If this happens, it is necessary to adjust the instrument
conditions.
3.1 PRECAUTION FOR OPERATION ................................................................... 3-1
3.2 ADJUSTMENT OF MAGIC ANGLE ............................................................... 3-3
3.3 SETTING OF IRRADIATION FREQUENCY.................................................. 3-4
3.4 SETTING PULSE WIDTH................................................................................ 3-5
3.5 ADJUSTMENT OF RESOLUTION .................................................................. 3-7
3.6 REFERENCE SETTING.................................................................................... 3-8
3.6.1 External Reference Setting ......................................................................... 3-8
3.6.2 Reference Setting by Using Z0 Shim ......................................................... 3-9
3.7 ADJUSTMENT OF CROSS-POLARIZATION CONDITIONS..................... 3-10
3.7.1 Adjustment of Cross-Polarization Condition under Low-speed
Spinning ................................................................................................... 3-10
3.7.2 Adjustment of CP Condition under High Speed Spinning ....................... 3-11
3.7.3 Adjustment of VACP Conditions............................................................. 3-11
3.7.4 Selecting a Method for Cross Polarization ............................................... 3-12
3.8 ADJUSTMENT OF DECOUPLING CONDITIONS ...................................... 3-13
3.8.1 Setting of CW (Continuous Wave) Decoupling Conditions .................... 3-13
3.8.2 Setting of TPPM Decoupling Conditions................................................. 3-13
3.8.3 Setting of XiX Decoupling Conditions .................................................... 3-14
3.8.4 Setting of SPINAL64 Decoupling Conditions ......................................... 3-14
3.8.5 Setting of CM Decoupling Conditions ..................................................... 3-15
3.8.6 Setting of SWf-TPPM Decoupling Conditions......................................... 3-15
NMECAXS_V50-SLD-2
3
SETTING OF