Agilent Technologies J-BERT N4903, User Manual

Page: 59 / 434

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Software-generated PRBS with polynomial 2^n cannot be referenced
in a sequence.
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If several PRBS patterns shall be included, all have to use the same
polynomial.
•
Every sequence has to be downloaded to the pattern generator
before it can be executed.
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Every sequence can be stored in a file and recalled from that file.
However, the SequenceExpression does not include user patterns.
Recalling a sequence from its file may fail if the referenced user
patterns are not available.
A recalled sequence is not automatically downloaded to the pattern
generator.
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In sequence mode, the function "Error Dector Pattern tracks the
Pattern Generator Pattern" is automatically disabled. You have to
download the expected (payload) pattern to the error detector.
•
During initialization of the sequence, pure zeros are sent.
User-Defined Sequences - Procedures
You can create a new sequence, save it in a file, or load a saved sequence
from its file.
Creating a New Sequence
If you wish to create a new sequence:
1 Choose Pattern and open the Sequence Editor.
By default, the Sequence Editor shows one block that is automatically
repeated. It has a length of 512 bits and generates Pause0 data (pure
zeros).
2 Click the Properties icon.
In the Properties window, set:
– the sequence start condition
– the number of blocks contained in the sequence (1 to 4)
3 Click Ok to close the Properties window.
Setting up Patterns
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Agilent J-BERT N4903 High-Performance Serial BERT 59