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3. MENU COMMANDS
4. Clear the MCB and acquire a well-isolated peak.
5. You will now use the gain stabilization section of the Stabilizer tab to configure the
resolution enhancer. (The gain stabilizer and resolution are somewhat similar in function,
and only one of these features can be used at a time.) Enter the Center channel and Width of
the peak acquired in Step 4; the maximum Width is 255 channels. If you wish, use the
Suggest button.
6. If you have already used the resolution enhancer, you can either use the previously
established settings (which will go into effect when you turn on the enhancer in Step 7), or
click on Initialize to clear all settings. Initialization does not change the current Center
channel and Width.
7. Return to the PRO tab and turn on the resolution enhancer.
8. Clear the MCB, re-start acquisition, and monitor the FWHM of the target peak until it no
longer changes. Typically, the more charge trapping exhibited by the detector, the longer the
data collection time.
9. When you are satisfied that the FWHM has reached the best possible value, clear the MCB
and collect another spectrum for confirmation.
10. At this point, the resolution enhancer is now “trained” for the current peak shape parameters
and can be turned off. (You can leave it on, if you wish, but you might notice some peak
broadening.)
11. If you change any parameters that affect peak position and/or shape, you must repeat this
“training” procedure.
ADC
This tab (Fig. 49) contains the Gate, ZDT Mode, Conversion Gain, Lower Level
Discriminator, and Upper Level Discriminator controls. In addition, the current real time, live
time, and count rate are monitored at the bottom of the dialog.
Gate
The Gate control allows you to select a logic gating function. With this function Off, no gating
is performed (that is, all detector signals are processed); with the function in Coincidence, a
gating input signal must be present at the proper time for the conversion of the event; in
Anticoincidence, the gating input signal must not be present for the conversion of the detector
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