Agilent Technologies J-BERT N4903, User Manual

Page: 361 / 434

The list contains all predefined standards, including user-defined
standards. User-defined standards are preceded by an asterisk (*).
3 Select one of the predefined standards.
or
Press Browse... to load your own standard, stored in a text file.
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 access
any file.
N O T E
The required file format is described in detail in “User-Defined Standards” on page
357 .
4 Press OK to load the data temporarily. Use this option, for example,
if the jitter-frequency list of your standard is still subject to change.
or
Press Apply to Predefined Standards to load the data and add the
standard to the list of predefined standards. For details see “Adding
a User-Defined Standard” on page 366 .
If you wish to increase the stress on the device under test, you can enter
a
Margin .
T I P
With the Auto Frequencies checkbox, you can adjust the test frequencies
automatically to the selected standard. This is described belowin
“Setting the
Frequency Range” on page 361 .
Setting the Frequency Range
You can freely specify the jitter frequency range and the number of
points to be measured. By default, the test points are suitably
distributed within the frequency range – according to the loaded
standard. But you can change the distribution according to your needs.
1
Switch to the Frequency tab.
Jitter Tolerance Tests
7
Agilent J-BERT N4903 High-Performance Serial BERT 361