User guide

3
View the Bit Comparison without USB3.1 SKPOS bar and errors indicator. See
“Status Indicators” on page 372 for details.
How to Analyze Instantaneous Measurements Results
To analyze the behavior of your device, you can do the following modifications to
the test setup and monitor the effect on the resulting "BER" / "8B/10B
Comparison" / "Bit Comparison without PCIe3 SKPOS" / "Bit Comparison without
USB3.1 SKPOS":
1
Add errors to the data stream. See “Manually Inserting Errors” on page 157 for
details.
2
Use alternating patterns to switch between different data streams. See “Setting
Up a Periodical Output” on page 162 for details.
3
Adjust the parameters of the output port of the pattern generator, as described
in “Setting Logic Levels and Terminations” on page 131.
4
Manually move the sampling point. See “How to Set the Optimum Sampling
Point Automatically ” on page 196 for details.
5
Make adjustments to your device.
This can be used to see how changes to your device affect the "BER" / "8B/
10B Comparison" / "Bit Comparison without PCIe3 SKPOS" / "Bit Comparison
without USB3.1 SKPOS". You can determine what adjustments improve or
degrade the "BER" / "8B/10B Comparison" / "Bit Comparison without PCIe3
SKPOS" / "Bit Comparison without USB3.1 SKPOS".
Evaluating Results 7
Agilent J-BERT N4903B High-Performance Serial BERT 365