The AEC-1000 consists of a DVD Drive and the "ALChecker" error measurement application which can check the written data quality. The application is capable of 1X CLV measurement as well as 4X CLV with DVD-Video/ROM and finalized DVD+R/-R media.

There are three measurement modes:

- Fine Mode: checks a series of eight consecutive ECC blocks,

- Rough Mode: checks eight consecutive ECC blocks every 100h ECC blocks

- Quick Mode: checks three specified areas

The checking status is shown graphically in real time while you can save the error graph at the end of the test. The reported errors are the PI and the UncPO. The PI counts the number of rows corrected by the PI error correction in each group of eight consecutive ECC blocks. The UncPO counts the number of ECC blocks in which more than one bytes are uncorrectable in eight consecutive ECC blocks. For our quality scans, we set for 1X CLV and Fine Mode which is the slowest and produces the safest results.

- Plextor 16X DVD+R @ 18X

- Verbatim 16X DVD+R @ 18X

- RiDisc 16X DVD+R @ 16X

- BenQ 8X DVD+R @ 8X

- Verbatim 16X DVD-R @ 18X

- Maxell 16X DVD-R @ 16X

- Datasafe 16X DVD-R @ 16X

- Datawrite MACH4 8X DVD-R @ 8X

- Summary

The media we chose to measure are those which either failed in CDSpeed or produced extremely unsteady graphs, or had high error levels with Plextools. We also measured all 18X burned media. The errors that we had seen with Plextools are confirmed here in the case of Verbatim-R 18X, Maxell-R and BenQ+R. All other discs that had high error values with Plextools, reported good quality with the Almedio checker.