Technical data

User alternate pattern;
Trigger is set with
SOUR3:TRIG:APAT<n> ABCH | SOP
APAT
SOUR3:TRIG:MODE
PATTDCL
SOUR1:PATT:SEL
Trigger sent according to
trigger ratio
(SOUR3:TRIG:DCDR)
SOUR1:PATT:UPAT0:USE
ZSUB PRBN MDEN UPAT
2
n
polynomial;
Trigger is set with
SOUR3:TRIG:ZSUB<n>
2
n
polynomial;
Trigger is set with
SOUR3:TRIG:MDEN<n>
2
n
polynomial;
Trigger is set with
SOUR3:TRIG:PRBN<n>
2
n
-1 polynomial;
Trigger is set with
SOUR3:TRIG:PRBS<n>
PRBS
User straight pattern;
Trigger is set with
SOUR3:TRIG:UPAT<n>
STR
SCPI
If a user-defined sequence of patterns is loaded to be generated, the trigger mode
can be set to Divided Clock or Sequence.
If the trigger mode is Sequence, a trigger can be generated whenever a block of
the user-defined sequence starts or restarts. Whether that really happens for a
particular block is defined for each block in the SequenceExpression. For more
information see “SequenceExpression for User-Defined Sequences” on page
112.
Working With User Patterns - Procedures
The following topics show you how to set up a program in IVI-COM and SCPI that
does the following:
• Sets up an alternate pattern file and sends it to the pattern generator and error
detector
• Sends triggers according to the input at AUX IN
• Sends a PRBS pattern to the pattern generator and error detector
3 Recommended Programming Techniques
60 Agilent J-BERT N4903B High-Performance Serial BERT
Triggering in Sequence Mode