The QA-201 Jitter Analyzer is an easy to use PC-based time interval measurement system that makes Jitter and Effect Length measurements according to Philips Orange, Yellow, and Red book standards. It measures both jitter and length deviation for all sizes of pits and lands (3T - 11T). It also measures error rates and provides a means to make pit geometry measurements.

The Jitter Analyzer uses a Philips CDM12 three-beam pickup, which is used by Philips for jitter measurements. This system is the only jitter measurement system other than Philips on the market that conforms to Orange Book jitter measurement specifications.

Applications:

Replication Process Control
CD-R Duplication
Media & Writer Qualification
Incoming Inspection / Quality Control

Key Benefits :

Jitter is a measure of the random variation in pit and land lengths. Jitter is important because the CD information is carried in the edges of the pits. A transition between pit and land (either pit to land or land to pit) is a one, and everything else is a zero. Since the data is self-clocked at a constant rate, if the edges of the pits are not in the correct places, errors will be generated. If a transition between pit and land comes as little as 115 ns early or late, an error will result. A standard deviation of less than 35 ns will result in only about 1% probability of the effect lengths varying by more than 115 ns. In addition, many types of disc defects will affect the jitter, making this a sensitive test of disc quality. Pit distortion, crosstalk from adjacent tracks, intersymbol interference, pit wall steepness, low signal-to-noise ratio, and LBR (or CD-R writer) instability can all cause jitter on the disc.

Features:

Histograms of pit and land lengths
Bar graphs of pit and land jitter
Bar graphs of pit and land length error
All graphs can be sized and printed
Summary of all results can be printed
Better than one nanosecond resolution
Line graphs of all error flags & dropouts
Measures BLER, E11, E21, E31, E12, E22, E32
Includes all the features of QA-101

Specifications:

Maximum Speed = 2X
Power consumption = 18.5 W
Disc Types = CD-ROM, CD-DA, CD-RW, Enhanced CD, CD-R, and CD-I
Dimensions = 5.79" x 1.64" x 7.95"
Weight = 2.4 lbs.

--- Specifications are subject to change without notice ---

System Requirements:

IBM PC compatible ('486 or Higher)
VGA graphics, 256 colors
One available ISA slot
One available serial port
Windows 95/98/NT/2000