jphalter@ihuxb.UUCP (10/11/83)
Present CD test discs have an opaque wedge on them to allow testing of a
CD player's error correction circuitry. This wedge runs from 0 to 900 microns
in width. The best players on the market can track through this wedge without
mistracking (skipping or creating a drop-out).
Since I don't use microns for everyday calculations, I made a quick conversion
from microns to inches to determine just how good the error correction
circuit on a top-notch CD player is.
Since 2.54cm=1in and 1 meter = 1,000,000 microns and 100 cm = 1m
a CD player can correct over:
900microns x (1m/1,000,000 microns) x (100cm/1m) x (1 in /2.54 cm) =
1/28 of an inch
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So much for 1/8" strips of tape on the disc!!!