NEC ND-6500A - Page 18

CDSpeed/PlexTools Scans - Page 7

In order to test the writing quality and readability of the burned media we used two readers with two software applications:

• The LiteON SOHD-167T with patched firmware being able to read DVD5 up to 16X CAV and DVD9 up to 10X CAV. For the transfer rate tests we used the latest Nero CDSpeed version.
• The Plextor PX-712A with the latest available firmware. For scanning the disc, we used the latest PlexTools version at 2X CLV reading speed, BURST mode, with middle accuracy.

In general, a "perfect" disc should have a smooth reading curve, very low PIE/POE and zero (0) POF error rates. Most times however, even though a disc has very low PIE/POE error rates, the reading curve may not be smooth containing dropoffs. Due to the fact that we oversped the reading capabilities of the LiteON SOHD-167T, such drops are expected, especially near the outer area of the disc.

The measurements below should be taken not as the absolute criteria of the burning quality, but as an indication level.

2.4X DVD+R Writing Speed

• 3A 4X DVD+R @ 2.4X

• 3A 8X DVD+R @ 2.4X

• Creation 4X DVD+R @ 2.4X

• Philips 8X DVD+R @ 2.4X

- Summary

When 8X and 4X writing speed was used, the burner reported very good quality scans. However, we were expecting to see better results as the writing speed is further reduced. Of course, this does not mean that results were not acceptable, but they were worse than all the 4X and 8X scans. It should be noted that except for Philips media, all other media cannot be clasified as "A" grade.