User guide

and drop the horizontal BER threshold in the graphical display to change this
value.
You can select the number of Decimal Places to be displayed in the table.
Graph Tab
On the Graph tab, you can use the several options to optimize the graphical display
according to your needs.
Choose between Unit Interval and Seconds to select the timebase for the display's
x-axis.
To analyze the graphs at a particular point, you can use the markers. Additionally,
you can display all related values for the markers in the marker readout.
Pressing the Reset Markers button will set the markers back to the default
positions.
Several zoom factors are available. When you show the zoom graph, you can also
allow the zoom graph to track the mouse (or your finger, if you are working directly
on the Serial BERT).
If you want to see the points that have actually been measured, choose Show
Measured Points. The MUI uses linear interpolation for the graph.
If you want to display the BER threshold contour line, choose Show BER
Threshold. The BER threshold is set on the View tab or by the slider in the Color
Bar.
N O T E
If no slider for the BER threshold is displayed, make sure that you have enabled the
BER Threshold option on the View tab and that a suitable BER is entered.
6 Advanced Analysis
300 Agilent J-BERT N4903B High-Performance Serial BERT
Table Number Format
Timing Units
Markers
Zoom
Show Measured Points
Show BER Threshold