Technical data

This has the same effect.
Allowing the Serial BERT to Settle
Allowing Serial BERT to Settle - Concepts
When patterns are sent to the pattern generator or error detector, the Serial
BERT requires some time to settle before. The following topics explain how the
instruments react to pattern changes.
How Pattern Changes Affect the Pattern Generator
The Serial BERT requires some time to change the patterns at the pattern
generator and error detector. This is particularly true for large text-based (ASCII)
patterns that have to be loaded from the file system. In such a case, it is a
recommended technique to always query the Serial BERT's Operation Complete
status after changing the pattern.
How Pattern Changes Affect the Error Detector
When the pattern changes, the error detector has to resync to the new incoming
signal. Depending on the signal, the alignment method used, and the desired BER
threshold, this procedure can take up to half a minute or more.
Allowing Serial BERT to Settle - Procedures
When patterns have been changed, you should check the status registers to make
sure that the operation is complete before continuing with your program.
Checking the Settling with IVI-COM
The following example illustrates how to check the synchronization status using
IVI-COM.
Private Sub CheckSyncStatus()
Dim BERTStatus As AgilentN490x.Interop.IAgilentN490xStatus
Dim myED As AgilentN490x.Interop.IAgilentN490xED2
3 Recommended Programming Techniques
22 Agilent J-BERT N4903B High-Performance Serial BERT