Agilent Technologies J-BERT N4903, User Manual

Page: 60 / 434

4 Specify the data to be generated during execution of a block.
– Click the Edit button of the block.
– Choose from the list. For example, you can select a PRBS
polynomial or browse for a pattern file. A "None" block is
completely ignored.
– If necessary, change the block length. The block length of user
patterns is derived from the file. Remember that such patterns
are automatically repeated until a multiple of 512 bits is reached.
– Decide on Trigger On or Off. This setting becomes effective if the
Trigger Out port is set to Sequence Trigger (trigger at block begin).
5
Create loops (if desired):
– Click the out-arrow of a block. A loop condition box labeled INF
appears.
– Click the in-arrow of the same or a previous block. This closes the
loop.
– Click the condition box and choose the appropriate break
condition.
6
Download the sequence to the pattern generator and test it.
7 Save the sequence in a file for later re-use.
Saving the Sequence in a File
To save the present sequence under a new name:
1 In the toolbar, click the Save As icon.
2
Select a suitable directory, for example
C:\N4903a\Sequences
.
3
Enter a file name.
The filename extension is
.seq
by default.
If the present sequence was loaded from a file and edited, you can also
click the
Save icon. In this case, the saved file is updated.
Loading a Sequence From a File
To recall a sequence from a file:
1 In the toolbar, click the Open icon.
2
Setting up Patterns
60 Agilent J-BERT N4903 High-Performance Serial BERT