Agilent Technologies J-BERT N4903, User Manual

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The number of logic 1's measured as logic 0's during the
accumulation period is displayed here.
•
Errored 0's Ratio
The ratio of the errored 0's count to the bit count is displayed here
to 4 significant digits.
•
Errored 0's Count
The number of logic 0's measured as logic 1's during the
accumulation period is displayed here.
G.821 Measurements
• Availability
The ratio of the available seconds to the total gating period expressed
as a percentage.
•
Unavailability
The error ratio is calculated over 1 second timed intervals during the
gating period. An unavailable period begins when the error ratio is
worse than 1 x 10
-3
for 10 consecutive seconds. These 10 seconds are
considered part of the unavailable time. The unavailable period ends
when the error ratio is better than 1 x 10
-3
for 10 consecutive
seconds. These 10 seconds are considered part of the available time.
Percent (%) Unavailability is the ratio of the unavailable seconds to
the total gating period expressed as a percentage.
•
Severely Errored Seconds
The ratio of the total number of available seconds with an error ratio
worse than 1 x 10
-3
to the total number of available seconds,
expressed as a percentage.
•
Degraded Minutes
Severely errored seconds are discarded from the available time and
the remaining seconds are grouped into blocks of 60 seconds. Blocks
which have an error ratio worse than 1 x 10
-6
are called Degraded
Minutes and Percent (%) Degraded Minutes is the ratio of the total
number of degraded minutes to the total number of 60 second blocks
in the available time expressed as a percentage. Incomplete blocks
of less than 60 seconds are treated as complete blocks of 60 seconds.
•
Errored Seconds
The ratio of the errored seconds in the available time to the total
number of seconds in the available time, expressed as a percentage.
Evaluating Results
6
Agilent J-BERT N4903 High-Performance Serial BERT 307