Section 5. Advanced Features and PlexTools Professional
PX-716 Installation and Users Manual 73
8. To end the measurement, click the Stop button, or wait for the
measurement to stop by itself. You see a graph representing the drive
write response.
9. To see the results, select View Log. You see the Test Results
window that shows what color corresponds to what test. You can
clear all or selected tests, then run more tests for comparison.
What the Measurement Means
This test reports the writing response of the Plextor PX-716 drive. The
graph should display a smooth linear curve up to the limit of the disc
capacity. If the curve is not linear or smooth, repeat the test with another
piece of media or media from a different vendor. Most write transfer
failures are caused by poor quality media or media that is not rated for
the maximum speed of the drive.
Measuring Q-Check C1/C2/CU Errors
This function reports on the C1, C2, and CU errors on the current CD in
the Plextor PX-716 drive. This test is for use on a CD that contains
content—that is, a commercial pressed CD or a CD recorded on a CD-
R/RW drive. (It’s not for DVD discs.)
To measure C1/C2/CU error:
1. Place a pressed CD-ROM disc, or a recorded CD-R or CD-RW disc,
in the PX-716.
2. From the PlexTools menu bar, select Q-Check C1/C2 Test. You see
the Q-Check window with a graph for C1, C2, and CU errors.
