User guide

Ratios Graph
This graph displays the delta errored 1's ratio, delta errored 0's ratio, and total delta
error ratio at data points over the entire accumulation period. The error ratios on
the y-axis are set to a range of 1E+0 (100 % errors) to 1E-12. The accumulation
period is on the x-axis.
During accumulation, data will appear to move from left to right on the ratios graph.
When the graph is completely filling the display, the x-axis time scale will double.
The data graph is then occupying only half of the display and will continue to move
to the right again. This will repeat until the accumulation period has ended.
This graph can accumulate a large amount of data. You can click any point on this
graph to zoom into an area of BER data. You can continue to click on the graph
until you have zoomed to the maximum. The point you click will appear in the middle
of graph. You can press the back button (left arrow) to zoom out again.
Evaluating Results 7
Agilent J-BERT N4903B High-Performance Serial BERT 379
Display Change
Zooming