52x CDRW Roundup - Page 13

Writing Quality Tests - Page 4

We tested the Optorite CW5201 with a variety of other media in order to check the writing quality performance. Note that the recording speed for each disc is the maximum allowed by the drive.

- 3T Pit results

The Mitsubishi Chemicals 48X media gave the highest 3T Pit jitter by the end of the disc. It seems that the specific media are not the best you can use for 52x writing with the Optorite drive. The rest of the disc gave a high overall performance, although jitter was slightly higher than 35nsec in some cases (FujiFilm 48x, Plextor 48x).

- 3T Land results

The 3T Land Jitter values are higher than the corresponding 3T Pit. Again the Mitsubishi Chemicals media gave the worst results. FujiFilm 48x showed high jitter from the first minutes of the disc, reaching the 47nsec. Despite the media type, the graphs climbed up to higher values towards the outer of the discs.

The 3T Pit jitter values are generally low, considering the high writing speeds we used for all the discs. On the other hand, 3T Land jitter is increased, especially with Mitsubishi Chemicals 48x and Plextor 48x media. FujiFilm 48x and Imation 52x gave higher results, as the writing speeds were increased to the maximum CAV values.

• Mitsubishi Chemicals 32X US-RW

Optorite CW5201 supports 32x rewriting with Mitsubishi Chemicals media. The disc information is available on the left picture.

After writing the disc at 32X, we measured the 3T Pit and Land jitter values.

As you can see in the below graph, the disc gave high 3T Land values, while the 3T Pit was lower. These values reached the 55nsec in specific areas of the disc, and this could be a problem even for the readability of the disc. Land jitter was decreasing as we tested the disc towards the outer area.

Despite the high jitter the US-RW disc was accurately read in all the drives we tested.