Agilent Technologies N4906B Serial BERT User Manual page 155

Accumulated Measurements
Display Change
Agilent N4906B Serial BERT, User's Guide, October 2005
♦ Analyze the basic accumulated results and log files. Possible
observations that may occur are:
– Errors became constant (and remained constant for a period of
time) or number of errored 0's was greater than errored 1's, see
"Constant Errors (More Errored 0's than 1's)" on page 169.
– Errors were random, see "Random Errors" on page 170.
– Sync loss seconds were measured, see "Sync Loss Seconds" on
page 171.
Accumulated Measurements – Reference
The Accumulated Results window presents data from the current and
previous accumulation period.
NOT E
Data from the current and all previous accumulation periods is
available in the measurement log files, if correctly set up.
This window contains a graph and five tables:
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.
Evaluating Results
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