User guide

Example Results
The following illustration shows the resulting graph of a typical DUT Output Timing
measurement:
The following figure shows a typical jitter histogram with two peaks indicating the
presence of random and deterministic jitter:
For a detailed explanation of the Fast Total Jitter measurement results see
“Explanation of the Fast Total Jitter Measurement Results” on page 262.
Understanding the Jitter Calculation
After the output timing behavior of the DUT is measured, the Serial BERT calculates
the different jitter components:
To understand the RJ and DJ results, it is helpful to first understand how the
software generates the results:
1
The bathtub curve is measured.
Advanced Analysis 6
Agilent J-BERT N4903B High-Performance Serial BERT 243
Random and Deterministic Jitter