What do the tests referenced in CD standards really mean?
• CD jitter test equipment seems to be expensive. Correlation problems also seem to exist. Is jitter really important? Is there an inexpensive way to measure jitter? • Why do you insist that CD E22 and E32 errors must be zero? I cannot find this requirement in any of the standards. Only BLER and BURST are specified, and seem to be adequate quality indicators. • Standards only require CD-ROM and CD-R discs to have a BLER less than 220. Why bother with tighter limits or other tests such as E22 and E32? • My CD-ROM discs unpredictably fail in the field. Some show E22 and E32 errors that do not always reproduce when the disc is retested. What is wrong with the data on these discs? • What is CD unbalance? Why do I keep hearing about it? • Why do CD discs fail in some drives but are readable in others? • CD discs work great in our test drive. Why do they fail in some 40X and higher speed drives? • Fragile CD discs are causing user problems. They crack or even shatter in high speed drives. Wh
