GBS Elektronik MCA 166 User Manual

Page 22

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does not use a certain voltage. If supply voltages which are not needed are turned off, the
battery lasts longer !

3.2.3.5 Setup Summary

This feature provides an overview on the setup parameters. It does not allow any editing
and is meant to give an overview on the current setup parameters.

3.2.4 Analysis
The analysis menu allows to perform basic MCA analysis functions like energy calibration,
the movement of a spectrum from one memory group to another, smoothing of a
spectrum, and subtraction of spectra.

3.2.4.1 E-Calibration

Allows to perform a two point energy calibration. The calibration coefficients can be set as
numeric values (channel energy pairs), as cursor position, or as peak centroid using the
graphic screen.

E-Calibration
Use the spacebar to turn the energy calibration "on" or "off".

Peak-Position
Use the space bar to switch between the use of the peak centroid, the cursor position to
determine the peak location, or manual input of coefficients.

Do calibration now
Switches to a graphic screen to do the energy calibration.

Input Channel 1
Enter lower channel number (in manual mode only) and corresponding energy

Input Channel 2
Enter upper channel number (in manual mode only) and corresponding energy

Input Coefficients (manual mode only)
Enter the slope in keV/channel and the offset in keV.

3.2.4.2 Smooth

Allows to smooth a spectrum. The smoothed spectrum overwrites the original spectrum.
Use the space bar to switch between a 3 or 5 point smoothing.

3.2.4.3 Strip

Allows to subtract or add two spectra which must be stored in two groups of the MMCA
memory. The resulting spectrum overwrites the spectrum in the first group. Sign of
stripping factor: A positive sign (default) leads to the subtraction of the spectrum stored in
the background group, a negative sign adds the spectrum.
You can input a stripping factor (default: 1). The spectrum stored in the background group
will be multiplied with this factor before it is subtracted (or added) to the spectrum stored

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