Section 4. Advanced Features and PlexTools Professional
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3. Click the Preferences button to view or change the preferences. You
can change the scale, the start position, and the end position.
Figure 20: Changing preferences for graphing focus error and
tracking error
4. Click OK to exit the Preferences window and return to the Q-Check
FE/TE Test window.
5. To begin measurement, in the FE/TE Test window, click the Start
button. You see the traces representing focus error (FE) and tracking
error (TE).