NU Combo DBW-521 - Page 9

Writing Quality Tests - 3T Jitter Tests

The NU drive supports 52X maximum writing speed. We used different manufacturer's media and wrote them all at the highest available speed. We then measured the Pit and Land values for those media and summarized the results in the ensuing graphs.

- 3T Pit results media (I)

All tested media, as the above two graphs show, returned high levels. Despite the fact that the Maxell media returned a very high average Pit Jitter, it was still readable by the reader.

- 3T Pit results media (II)

Again, all media returned high values, all well above the 35ns RedBook limit. According to the graphs, all media recorded high values from the beginning of the disc's surface up to the end.

- 3T Land results media (I)

As was expected from the previous Pit measurement, three out of four tested media returned increased values, with Maxell reporting the highest values.

- 3T Land results media (II)

Once again, slighlty increased values with BenQ media reaching an average Land Jitter of 56.85ns

The above table shows that all media returned Jitter values over the 35ns RedBook limit. Looking at the average Pit and Land values, we conclude that the average measurements for most media well and truly overshot the 35ns RedBook limit, but we have to mention that no read errors occurred during the measurements.