GBS Elektronik MCA 166 - Manual (Page 16)

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overlayed to a spectrum already stored in the memory. Use the spacebar to toggle the
options between "yes" and "no"
.
3.2.1.2 Save
Here you reach a submenu offering the choice to open a drive box or to set file save
options.
With "Save" you enter a drive and file box. Under Dir, you can type the drive letter, e.g.,
a:\ and press Enter. Using the Arrow and Enter keys, select the subdirectory into which
the file is to be saved. Type the filename under File. Move the cursor bar to OK and press
Enter to save the file.
With "Option" you reach an options setting menu for saving a file. Normally all options are
set to "yes" to save a file with all setup, ROI and calibration information. If, for e.g., only
the ROI option would be set to "yes", then only the ROI list would be saved. Use the
spacebar to toggle the options between "yes" and "no".
3.2.1.3 Exit
Leaves the MCA emulation program and exits to the DOS prompt. The MCA module,
however, may continue to collect a spectrum. So you can disconnect the computer and
leave the MCA measuring on its own. But, if you want to do this, leave the high voltage on
when exiting, and, after connecting the MCA again and starting the MCA program, do not
reset the MCA, otherwise the measurement will be deleted.
3.2.2 Acquire menu
The acquire menu provides a start function to begin data collection. The data gathering is
controlled from the graphic screen. It further provides acquire presets and MCA or MCS
mode selection including their setup. One of the three memory groups of the MCA can be
chosen as an active group for data collection. A clear function allows to clear all ROIs and
data.
3.2.2.1 Start
The first graphic screen is the ACQUIRE screen, which contains operative information like
count rate, presets for the measurement and which provides a quickly updated live
display of the spectrum. To start a measurement, press F4. During a measurement only
256 channels (the width of the spectral display) are transferred automatically every 2 sec.
from the Mini MCA to the (Palmtop-) PC.