Agilent Technologies J-BERT N4903B, User Manual, Page: 451 / 572

Predefined Standards
The Jitter Tolerance Compliance option provides a number of predefined standards.
Predefined standards specify:
• Jitter frequency range
The jitter frequency range may depend on the bandwidth of the receiver being
tested.
• Bit rate range
Some standards define the jitter tolerance curve as a function of the bit rate.
If this is the case, the edges of the jitter tolerance curve are shifted towards
higher frequencies if the bit rate is increased, and vice versa.
• Jitter amplitudes in defined sections of the jitter frequency range
The slopes between adjacent sections may be double logarithmic (shown as
straight lines in the double logarithmic display) or are calculated according to
certain algorithms.
• Data pattern to be used
This can be, for example, a certain PRBS-polynomial or a specific test pattern.
• Signal voltage range
Most standards refer to specific devices.
• Jitter composition
A standard may prescribe that additional jitter components with specific
amplitudes have to be added.
The standards provided by Agilent can be chosen from a list of predefined
standards.
Every standard is accompanied by a description that states its specific
requirements, like applicable bit rates, patterns to be used, and so on.
N O T E
Before running the test, set up the instrument to ensure that these requirements
are met. For details on the recommendations and their dependencies see
Description in the
“Standard Specification” on page 462 .
If a standard specifies a tolerance curve that is bit rate dependent, the curve is
automatically adapted to the present bit rate. If you change the bit rate, the curve
is automatically recalculated.
The standards provided by Agilent cannot be edited locally.
Jitter Tolerance Tests
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Agilent J-BERT N4903B High-Performance Serial BERT 451
Standard Specifications
Using Standards