User guide

Understanding the Result Parameters
All result parameters are calculated from the BER threshold contour line and its
bounding box. So, all parameters change with the BER threshold.
The result display of the Eye Opening measurement shows the maximum eye
opening time, the maximum eye opening voltage, and the position of the optimum
sampling point.
These parameters are derived as illustrated in the figure below:
Error Location Capture
Error Location Capture - Concepts
The Error Location Capture measurement allows to capture the position of an
errored bit in a memory-pased pattern. The instrument saves the position of the
errored bit and writes a bit sequence neighbouring the errored bit to a file.
This feature can be used to find rare or random errors. A DUT could have problems
handling long series of zeroes. Error Location Capture can be used to locate the
bit errors in such cases.
6 Advanced Analysis
302 Agilent J-BERT N4903B High-Performance Serial BERT