User guide

This opens a dialog box which allows you to load a file. By default, the browser
searches for files with the suffix .jcs, but you can load any file.
N O T E
The required file format is described in detail in “User-Defined Standards” on page
452.
5
Check the Show Jitter Curve checkbox. It shows the jitter curve on the Jitter
Tolerance Characterization graph.
Before Running the Test
For DUTs that require a training sequence it is essential to prevent clock loss at
the beginning or end of the test. To avoid clock loss, the sinusoidal jitter component
has to be enabled. Since the sinusoidal jitter for the test is generated internally,
the jitter amplitude must be set to zero:
1
Click the Jitter Setup menu item from the Jitter submenu.
This opens the Jitter Setup window.
2
Enable jitter generation. Press the respective checkbox.
3
Activate Sinusoidal jitter.
4
Activate Periodic jitter
5
Set the jitter amplitude to 0 UI for both Sinusoidal jitter and Periodic jitter.
Running the Test
Once you have specified the Frequency, BER, and Search criteria, press the
Start button to run the test.
The bar in the lower right-hand corner of the screen shows the progress.
Jitter Tolerance Tests 8
Agilent J-BERT N4903B High-Performance Serial BERT 441