52x CDRW Roundup - Page 11

Writing Quality Tests - Page 2

We made the same tests as in the previous page, but this time we burned a variety of CD-R media with Plextor Premium. Note that the recording speed for each disc is the maximum allowed by the drive.

- 3T Pit results

As we can see from the above graphs, the 3T Pit Jitter exceeds 35ns RED book limit in some areas for almost all media, except from Fuji 40X, Emtec 48X and Mitsubishi Chemicals 48x. The rest media introduced slightly higher 3T Pit Jitter but all the results are adequate. An exception to all these is the TDK 48x media, which gave high values from the 35min address, until the end of the disc.

- 3T Land results

The average 3T Land Jitter values are almost equal to the corresponding 3T Pit. Again the TDK media made the difference and produced high jitter values from the first minutes of the disc. This time those values reached the 60nsec which is definitely unacceptable.

Plextor Premium seems to give quality results with the most of the media. TDK 48x gave the worst results with increased Pit and Land jitter values.

- PlexTools Professional Jitter Tests

• TDK 48x

We used various CD-R media and to write the same amount of data at the highest allowed writing speeds. You can see all the jitter graphs in the following links:

• Fuji 40x
• FujiFilm 48x
• Imation 48x
• Mitsui 48x
• Memorex 52x
• Prodisc 40x
• Ritek 48x
• SKC 48x

According to the Plextools graphs, the Fuji 40x, Prodisc 40x and Ritek 48x media seems to give high jitter peaks in some areas of the disc.

- PlexTools Professional C1 and C2 Tests

- FujiFilm 48x

We measured the same media with the PlexTools C1/C2 testing procedure. All the results are illustrated in the following table.

None of the drive gave any CU errors. The highest C2 values were reported with SKC and Imation media.