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. In the case of PI, it counts the number of rows corrected by the PI error correction in each group of eight consecutive ECC blocks. In the case of UncPO, it counts the number of ECC blocks in which more than one byte is uncorrectable in eight consecutive ECC blocks. For our quality scans, we set it for 1X CLV and Fine Mode which is the slowest and with the safest results. Also, we chose to measure all the media burned at the maximum available writing speed, namely 16X.

• CMC 16X DVD-R @ 16X

• Verbatim 16X DVD+R @ 16X

• Verbatim 16X DVD-R @ 16X

• Ridisc 16X DVD+R @ 16X

- Summary

We chose four 16X burned media, and ran Almedio's "ALchecker" to validate their performance. The scans are posted with quality priority, so the first three scans can be described as good quality, while the Ridisc scan, the last one can be described as bad, managing to complete the test while it reported a max PI value of 251 with the absolute limit at 280 PI. The plextools scans on this media differ from the "ALchecker" outcome.