ORTEC Easy-MCS, Hardware User Manual

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931054C / 1213 6. MENU COMMANDS
47
Fig. 33. Example Ramp Waveforms.
Fig. 34. Adjust Input Levels
During Data Acquisition.
these voltages. To change a voltage, click the slide button and drag the mouse up or down to the
setting you want. To make small adjustments, click the slide bar above or below the slide button.
To make super-fine adjustments, click once on the slide bar to activate it, then use the <
8
>/<
9
>
keys. The nominal voltage is displayed below the bar.
When the Begin-Mid-End Style is selected, the voltage at the middle channel in the pass must
be specified. A third slide bar is displayed to specify this voltage. A straight line will be drawn
between the specified voltages; however, since the voltage is generated by a digital-to-analog
convertor, the waveforms will have a discrete appearance (“stair steps”).
6.2.8. Adjust Live Input...
This command opens a small dialog (Fig. 34) that allows
you to adjust the discriminator or SCA levels while data
collection is in progress. This feature is useful in setting
up the thresholds since the data responds immediately as
the threshold is adjusted. In contrast, if you use the Input
Control... dialog to adjust the thresholds, you must close
that dialog before the adjustment takes effect.
6.2.9. SCA Sweep...
This command opens a dialog and sidebar that allow you to efficiently choose the optimum SCA
settings. An SCA window (with a width of 19.5 mV between the upper and lower levels) is
swept from 0 to +10 V in 512 steps. The Easy-MCS records the number of counts that arrive
during each setting. The resulting histogram displays the pulse-height spectrum presented at the
SCA input.