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, Rough Mode and Quick Mode. The first checks a series of eight consecutive ECC blocks, the second checks eight consecutive ECC blocks every 100h ECC blocks and the last, the fastest, 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 for 1X CLV and Fine Mode which is the slowest and with the safest results. Also, we chose to measure media burned at the maximum available writing speed which is 16X and 8x for DVD+R and DVD-R respectively.

• TDK DVD+R 16X @ 16X

• Mitsubishi Chemicals DVD+R 16X @ 16X

• Taiyo Yuden DVD-R 8X @ 8X

• Mitsubishi Chemicals DVD-R 8X @ 8X