Philips DVDR824P DVD+RW - Page 10

Writing Quality Tests - 3T Jitter Tests

Here we used 80min CD-R media from various manufacturers and burned the same AudioCD project at 40x. The following graphs show the 3T Pit & Land Jitter results.

- 3T Pit results

The SKC disc starts off with a high jitter level but levels off to an acceptable level (i.e. below the 35nsec level). All the discs exhibited a jump to well above the critical 35nsecs. Best performance was achieved with the EMTEC, RITEK and MEMOREX discs.

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 those in the previous measurements of the 3T Pit Jitter, although they contain fewer graduations. Here too however, there is a sharp jump at the end of the disc where data density is at its highest.

In the following page, we next check the C1 and C2 error rates for the same discs, to come up with conclusive results.