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Download PDF Literature for QA-201
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 The
Clover Systems 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
Clover Systems 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.
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Applications: |
Replication
Process Control
CD-R
Duplication
Media
& Writer Qualification
Incoming
Inspection / Quality Control
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Key Benefits : |
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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.
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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
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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.
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Specifications are subject to change without notice ---
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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/XP
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Warrantee: |
All
Clover Systems products are sold with a one-year warranty.
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