Differentiate; Remove Dc Bias - JEOL JSPM-5200 Instructions Manual

６ ANALYSIS OPERATION

6.12.4 Differentiate

The displayed graph data is differentiated.
Calculation
A differentiation method is selected in this frame. The available differentiations are as
follow:
Data Width
The number of data to be used for the Savitzky-Golay method is specified in this
input-box.

6.12.5 Remove DC Bias

All the Y values are averaged, and the result is subtracted from each Y value.
Select Remove DC Bias from the Process pull-down menu.
The operation is performed, and the processed result is displayed.
6-104
Operation
dI/dV 1st derivative by the Savitzky-Golay method
dlnI/dlnV Normalised result of the dI/dV
d2I/d2V 2nd derivative by the Savitzky-Golay method
d2lnI/d2lnV Normalised result of the d2lnI/d(lnV)2 is
normalized by V/I.
Y
10
5
X
—5
—10
Current (displayed)
graph
Description

Remove DC Bias

(Average is assumed
to be 2.5)
Y
10
5
X
—5
—10
Tip offset
TMPM5200-2