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 on 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.

- Philips 16X DVD-R @ 16X

- BenQ 16X DVD-R @ 16X

- Mitsubishi Chemicals 16X DVD-R @ 16X

- CMC 8X DVD-R @ 8X

- ProdiscF01 8X DVD-R @ 8X

- Datawrite 8X DVD-R @ 8X

- Taiyo Yuden 8X DVD-R @ 12X

- Summary

According to the Almedio AEC-1000 error checker, the drive has good writing quality. The media we chose to measure are those which either failed in CDSpeed, or produced unsteady graphs with the LiteOn reader. In Plextools, Taiyo Yuden media reported lower error rates... but the Almedio checker has a different opinion.