User guide

Evaluating Results

Evaluating Results - Concepts

The Serial BERT offers several different kinds of tests that can be run:

• Instantaneous Measurements

This type of measurements is used to monitor the instantaneous "BER" / "8B/

10B Comparison" / "Bit Comparison without PCIe3 SKPOS" / "Bit Comparison

without USB3.1 SKPOS" during measurement setup, experiments, and

adjustments.

• Accumulated Measurements

This type of measurements is used to measure and log error performance over

time. Also, you can capture the location of bit errors for further analysis.

• Eye Measurements

This type of measurements is used to measure the eye height and width of the

incoming data signal at specific alignment BER thresholds. This information is

displayed on a representation of an eye diagram.

Instantaneous Measurements

Instantaneous Measurements - Concepts

With instantaneous measurements, you can directly view the current "BER" /

"8B/10B Comparison" / "Bit Comparison without PCIe3 SKPOS" / "Bit

Comparison without USB3.1 SKPOS" results on the screen.

The "8B/10B Comparison" includes the following measurements:

• Symbol Error Ratio (SER)

Agilent J-BERT N4903B High-Performance Serial BERT

User Guide

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