User guide

N O T E
The Jitter Tolerance Compliance measurement is a software option that requires a
license. For details on how to obtain and install such licenses refer to “Obtaining a
License” on page 535.
Measurement Principle
The Optical Internetworking Forum (OIF) and other institutions have proposed and
published standards for testing the performance of data receivers and receiver
circuits in the presence of jitter.
These standards prescribe the required jitter tolerance over jitter frequency. The
jitter tolerance for each frequency point is defined by a jitter amplitude (normalized
to the bit rate and hence specified in Unit Intervals – UI) and a BER threshold which
must not be exceeded.
A simple example is shown in the figure below:
Some standards are more detailed, as illustrated in the following figure:
Jitter Tolerance Tests 8
Agilent J-BERT N4903B High-Performance Serial BERT 447
Jitter Tolerance Curves