User manual

Windows Server Program
ComTec GmbH 5-14
In the "Sum of counts" dialog you can select which ADCs will contribute to the superdetector. It is
recommended to enable "Use Calibration" and to perform a careful calibration of all selected
ADC's:
Make a short acquisition using a pulser or a calibration source so you get a peak in each used
ADC. In each ADC zoom into the spectra, then by keeping the right mouse button pressed drag
from left to right over the peak to mark a fit region and click on the "Fit" toolbar icon to make a
Gaussian peak fit. Note the position value of the peak in the first ADC. For the first ADC you can
just enable "Use Calibration" in the calibration dialog and use the standard parameters p0=0,
p1=1. In the next ADC enter two calibration points: for the first point enter 0 for the Channel and 0
for the value and click "Add>>". For the second calibration point use the result of the fit: Click "Fit"
to enter the Channel value of the fitted peak position. For the "Value" enter the fit result of the
peak position in the first ADC. Click "Calibrate" and enable "Use Calibration", then click "OK".
Proceed this way until all used ADCs are calibrated. You will immediately get the effect: Instead
of a peak multiplet you will see a single sharp peak in the sum spectra.
The automatic generated spectra name is for example "OR_3_C". The 3 is here an hexadecimal
bit pattern indicating that ADC1 (bit 0) and ADC2 (bit 1) contribute to the OR sum. The C at the
end of the name means that "Use Calibration" is enabled.
Figure 5.18: Sum of counts spectra before and after calibration