Technical data

Working With User Patterns
Working With User Patterns - Concepts
The following topics provide information on the recommended techniques for
working with user patterns.
Techniques for Editing User Patterns
The recommended way to edit a user pattern in IVI-COM is as follows:
• Define the pattern
This includes the length, description, and whether the pattern is alternate or
standard.
• Insert the data
The data format and the data itself must be defined.
• Send the pattern to the pattern generator and/or error detector
• Set up a trigger on the pattern generator to be sent with the pattern
N O T E
The Serial BERT can use 12 user patterns (UPATtern<n>) and any number of user
pattern files (UFILe). There is absolutely no difference between these patterns. The
user patterns are stored in the same format on the file system, with the name
UPAT<n>.ptrn (for example, upat12.ptrn).
The user patterns are provided for backwards compatibility. It is recommended that
you use user pattern files, and not the user patterns.
N O T E
UPAT0 is a synonym for the pattern currently executed by the instrument.
How the Serial BERT Uses Alternate Patterns
These patterns are used to define the pattern generator's data output signal.
Various commands can be used to define which pattern is sent at any one time.
These commands, and how they interact, are described below.
Recommended Programming Techniques 3
Agilent J-BERT N4903B High-Performance Serial BERT 55