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Apr-09
Avantes
www.avantes.com
Goto Preset Scale button
By clicking this button, the scale for X- and Y-axis will be set to a range that has been set before.
The same result can be achieved with the menu option View-Goto Preset Scale
Graphic Reset button
By clicking this button, the X- and Y-axis will be reset to their default values. The same result can be
achieved with the option View-Graphic Reset
Edit bar
-USB1 platform
-USB2 platform
multichannel
For USB1 when AvaSoft is acquiring data, the edit fields are gray and non-editable. By clicking the
red STOP button, data acquisition is stopped and the edit fields become white and editable. The edit
bar shows the following parameters:
Integration time[ms]
This option changes the CCD readout frequency and therefore the exposure- or integration time of
the CCD detector. The longer the integration time, the more light is exposed to the detector during
a single scan, so the higher the signal. If the integration time is set too long, too much light reaches
the detector. The result is that, over some wavelength range, the signal extends the maximum
counts or in extreme case shows as a straight line at any arbitrary height, even near zero. Entering a
shorter integration time can usually solve this. Try to adjust the integration time, such that the
maximum count over the wavelength range is around 90% of the full ADC scale (14750 counts for the
14bit ADC, 59000 counts for the 16bit ADC).. When at minimum integration the signal is still too
high, an attenuator (FOA-INLINE), a neutral density filter or fibers with a smaller diameter may be
used. When not enough light reaches the spectrometer, likewise a longer integration time should be
entered.
If measurements are done in a mode in which reference and dark data are required (all modes
except Scope mode), then new reference and dark spectra need to be saved after the integration
time has been changed.
Average
With this option, the number of scans to average can be set. A spectrum will be displayed after
every # scans. This spectrum is the average of the # scans.
