Philips DVDR824P DVD+RW - Page 9

Writing Quality Tests - 3T Jitter Tests

We used 80min 48X CD-R media by Taiyo Yuden and burned the same AudioCD project at 8x, 16x, and 24x. In the following page you can see the 3T Pit & Land Jitter graphs.

- 3T Pit results

Generally the drive did not introduce high 3T pit jitter with the specific media. The highest 3T pit jitter was reported from the discs recorded at 16x and 24x, in the outer area. In these areas, the jitter reached the 42 nsec and 46 nsec respectively, which is far above the Red Book limit at 35msec. The 8x and 16x recorded discs gave very good results.

The average 3T Jitter values for all recording speeds are illustrated in the following table.

- 3T Land results

The average 3T Land results are almost the same in comparison with the previous measurements of the 3T Pit Jitter. For speeds below 16x we took quality results but for 16x and 24x we had again increased 3T Land jitter values once again in the outer area of the disc. The highest values was 40nsec for 16x and 43 for 24x.

- Summary

The average 3T Pit and Land jitter values are below the 35nsec standard for 8x and 12x speeds. The other two speeds of 16x and 24x gave high jitter in the outer addresses so the error rate will be possibly higher there.