User guide

N O T E
This checkbox is not available on instruments on which the calibrated and integrated
jitter injection option J10 is installed. On such instruments, the Delay Control In port
is enabled or disabled from the Jitter Setup window.
Error Addition/Insertion
Error Addition/Insertion - Concepts
To test error correction algorithms, alarms and other functions that are imbedded
in the data pattern, you can insert logic errors (flipped bits) into the pattern.
The instrument provides several options (in the pattern generator's Error Add
dialog box) for inserting error bits manually or automatically.
Error Addition/Insertion - Procedures
You have the following options for inserting errors into the output data stream:
Manually Inserting Errors
To manually insert a single error into the output stream:
1
Click the Error Add button at the top of the screen to insert one single bit error
in the output stream.
This button is active unless you define a fixed internal error rate. The maximum
number of errors that this function supports, is one error per 128-bit block.
2
If you want to disable all other error insertion functions, so that only manual
error insertion is possible, click Error Add Setup menu item from the PG
Setup submenu to open the Error Add Setup dialog box.
3
Select Off and click OK to close the dialog box.
Setting up the Pattern Generator 4
Agilent J-BERT N4903B High-Performance Serial BERT 157