Optorite DD0203 dual DVD±RW recorder - Page 9

Writing Quality Tests

We used 80min 48X CD-R media by Taiyo Yuden and burned the same AudioCD project at 16X, 20X 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 in the specific media. The highest 3T pit jitter was reported from the discs recorded at 16x, in the beginning of the disc and in the outer tracks. In these areas, the jitter reached the 39nsec, which should be an acceptable level, although the Red Book limit is 35msec. The 24x and 20x 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 slightly increased over the in the previous measurements of the 3T Pit Jitter. In this case the 24x disc gave higher jitter especially in the outer part of the disc, where the writing speed was 24x (Z-CLV). The maximum jitter values reported were 42ns, and come from the measurements of the 16X recorded disc, again in the outer tracks of the disc.

- Conclusion

The average 3T Pit and Land jitter values are below the 35nsec standard for all the recording speeds. The 16x recorded discs gave some slightly increased values but it seems that they cannot influence the overall quality. The 24x recording speed introduced higher 3T Land jitter than 3T Pit jitter values. The overall performance is acceptable for all the supported writing speeds.