Mitsumi CR-485FTE - Page 8

Writing Quality Tests

We used various CD-R media and burned the same AudioCD project (with CD-Text) at the maximum allowed recording speeds. Below you can see the 3T Pit & Land Jitter graphs. Notice that the speeds included in the graphs are the nominal ones for each media and not the actual burning speeds. You can check the actual writing speeds in the CD-R Tests page.

- 3T Pit results

As you can see the 3T Pit jitter is low for the most part of the written media. However, the results are as expected since the actual writing speed for most of them was less than 48x. A pleasant exception is the case of Samsung 48x, Ciba Plasmon 48x and SKC 48x discs, which were burned at 54x. These discs gave very good results and low jitter.

On the other hand, the TDK 48x media showed very high jitter that reached 53msec. The burning speed was set to 54x but it was reduced to 48x by the drive itself.

Below you can see the average 3T Pit jitter values for all the media we used in this test:

- 3T Land results

The average 3T Land results are almost the same as in the previous measurements of the 3T Pit Jitter. Again the drive gave a very good performance with all the media except the TDK 48x.

- Summary

The Mitsumi CR-48XFTE gave very low jitter with the most of the CD-R media we burned, in the maximum allowed speed. However, since the writing speed was reduced during recording, the jitter was kept at lower levels than expected.

TDK 48x discs seems to not work very well with Mitsumi CR-48XFTE. They gave the lowest performance among the discs we tested with jitter values that reached 52msec.

Apart from the fact that Mitsumi CR-48XFTE recorded the most of the discs at a lower speed than the maximum, the behavior of the drive regarding the jitter introduced is very good.

- C1 / C2 Tests

Below you can see some C1 / C2 error graphs for the TDK 48x, Fuji 40x, Taiyo Yuden 48x and SKC 48x media.

• TDK 48x

• Fuji 40x

• Taiyo Yuden 48x

• SKC 48x

According to the measurements, none of the discs gave C2 errors, and the average C1 rate is generally low. In case of TDK 48x media, where it had introduced the highest jitter values, the C1/C2 test showed that the disc gave the highest average C1 error rate but not any uncorrectable error.

As long a the discs recorded at 54x are concerned, again the performance seems to be adequate judging from the graph of the SKC 48x media.