User guide

N O T E
The zooming function cannot be used before the accumulation period has ended.
N O T E
To view precise BER data for every point in time, view the measurement log file.
While zoomed in, you can move data left or right by dragging the graph or by using
the front panel knob.
You can also zoom vertically by dragging the top and bottom sizing handles. The
current view can be moved vertically if you click between the handles and drag
them up or down.
Accumulated Results
In the Accumulated Results table, the following values are listed:
•
Bit Count
The number of bits considered for the accumulation period is displayed here.
This may not equal the total number of bits sent from the PG.
•
Bit Error Ratio
The ratio of the error count to the bit count is displayed here to 4 significant
digits.
•
Bit Error Count
The number of errored bits measured during the accumulation period is
displayed here.
•
Errored 1's Ratio
The ratio of the errored 1's count to the bit count is displayed here to 4
significant digits.
•
Errored 1's Count
The number of logic 1's measured as logic 0's during the accumulation period
is displayed here.
7 Evaluating Results
380 Agilent J-BERT N4903B High-Performance Serial BERT
Sizing Handles