Technical data

3
Recommended Programming
Techniques
Recommended Programming Techniques - Concepts
This chapter provides some recommended techniques you should use when
programming the Serial BERT.
Output Protection
Output Protection
The pattern generator's Data, Clock, Aux Data and Trigger/Ref Clock Out ports
must be terminated with 50 Ω if they are not connected. Termination of output
ports improves the test performance.
The following sections describe a protection algorithm and how you can handle
the algorithm's delay time in an automated test environment.
Output Protection Algorithm
The instrument has an internal protection algorithm that protects the instrument
from improper termination of the pattern generator's output ports.
The algorithm checks for an open condition on these ports every 100ms. If the ports
are not correctly terminated, the algorithm adjusts the port's output levels to safe
levels:
• V
Term
remains unchanged.
Agilent J-BERT N4903B High-Performance Serial BERT
Programming Guide
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Agilent Technologies 19
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