How to Contact Media Sciences Return to the FAQ Index CD jitter test equipment seems to be expensive. Correlation problems also seem to exist. CD-ROM discs contain physical pits and lands. If these results are good, jitter is usually low and may not require measurement. CD-R discs only imitate pits.
Various dyes produce different simulation patterns.
Experience shows that all parametric measurements and error rates may be satisfactory for a CD-R disc yet jitter may be unacceptable. Jitter therefore is an important test for CD-R discs. Correlation can be difficult for many tests including jitter. Three problems can result in poor correlation. First, differences in players and especially in the laser beam and optics can give different results.