JDS Uniphase SmartClass E1 - BERT Results

Chapter 7 Test Results
Datacom results
SmartClass E1 Tester User’s Guide 93
BERT results The BERT results change, depending on the timing selection and the pattern.
Table 27 describes the results that can appear in the BERT test result cate-
gory.
Tx Chars Count of the number of transmitted characters
since the last test restart.
Table 26 Data results (Continued)
Result Definition
Table 27 BERT results
Result Definition
Bit Errors Number of received bits with a value opposite that of the
corresponding transmitted bits, after pattern synchroni-
zation has been achieved. Does not appear if using the
Delay pattern.
Bit Count Does not appear if using the Delay pattern.
Bit Error Rate Ratio of bit errors to received pattern data bits. Does not
appear if using the Delay pattern.
Pattern Loss Seconds Number of seconds that the received pattern is lost rela-
tive to the expected (therefore, internally generated) test
pattern.
Pattern Slip Seconds Number of seconds in which a pattern slip was detected
since start of test (PRBS patterns only). Appears if using
synchronous timing and not using the Delay pattern.
Block Count Does not appear if using the Delay pattern.
Block Error Rate Does not appear if using the Delay pattern.
Block Errors Appears if using synchronous timing and not using the
Delay pattern.
Error Free Seconds Number of seconds during which no pattern bit errors
are detected while pattern synchronization is present.
Does not appear if using the Delay pattern.
Error Free Seconds % Ratio, expressed as a percentage, of seconds during
which no pattern bit errors were detected, to the total
number of seconds while pattern synchronization is
present. Does not appear if using the Delay pattern.
Error Seconds Number of seconds during which one or more pattern bit
errors occurred since initial pattern synchronization.
Does not appear if using the Delay pattern.
Elapsed Seconds Total number of test seconds. Does not appear if using
the Delay pattern.
Sequence Sync Loss
Count
Number of times the receiver lost pattern synchroniza-
tion, even momentarily, since initial pattern synchroniza-
tion.
Sequence Sync Loss
Secs
Number of seconds during which the receiver lost pat-
tern synchronization, even momentarily, since initial pat-
tern synchronization.
Round Trip Delay The current time between transmission and reception of
the Delay pattern. The result is given in milliseconds.
Only applicable when the BERT pattern is set to Delay.