BenQ DW822A 8X Dual - Page 9

Writing Quality Tests - 3T Jitter Tests

The BenQ DW822A supports a maximum writing speed of 24x and uses P-CAV writing strategy for the writing tasks. We expect to see quality values, since the supported writing speed could be considered as a safe writing speed for all writers since most currently available CD and DVD writers, support much faster writing CD-R speeds up to 52x and 40x respectively.

- 3T Pit results

The above graph shows Pit Jitter values at very acceptable levels. All discs are within the 35ns RedBook limit except for the TY and Intenso discs which had increased jitter values at the start and the end of their surfaces, respectively. BenQ media gave back the lowest Pit values while SmartBuy had the most stable writing quality.

The above graph shows the average Pit values for each recorded disc. The lowest average value comes from Intenso, although as we noticed before, its quality measurement reported increased Pit Jitter (above 35ns) at the end of its surface. Moreover, as shown on the graph, all media reported average Pit Jitter lower than the 35ns RedBook limit.

- 3T Land results

Comparing, the Land and Pit Jitter graphs with the various media written with the BenQ at 24x appear identical. This means that the Land Jitter values are also at an acceptable level.

The average Land Jitter vales for all written media are lower than the 35ns RedBook limit. The highest average was reported with TY at 33.49ns, while the best quality results came form BenQ and Intenso.

The above table shows that only Smartbuy and BenQ media returned final values lower than the 35ns Red Book limit. Intenso media gave back the lowest Pit and Land average values but with increased measurements (above 35ns) at the end of the surface, near the 80min mark. As we mentioned at the beginning of the page the end user should consider that these measurements were reported for media written at only 24x and that the speed is considered as much more stable than the currently supported maximum available with most drives on the market.