OC3port Plus
User Manual
6-80
You see the
LOADING SELECTED TRAFFIC PATTERN
message,
followed by the BERT results display. For example:
6.411E-11 BER
1.000E+00 ERRORS
1.560E+10 BITS
0 E/S
za161f.eps
This particular display shows the bit error rate (
BER
), which is the number of
errored bits divided by the total number of bits received. Note that the display
also shows you the total number of errors (
ERRORS
), the total number of bits
that have been received (
BITS
), and the errors per second (
E/S
).
4.
Press the
Left
or
Right Arrow
key to view the remaining BERT measurements.
These include the following:
•
ESEC
Errored seconds. The number of seconds with one or more
errors.
•
THSEC
Threshold seconds. The number of seconds in which the
number of errors exceeded the threshold value.
•
OOF
ATM BERT synchronization out of frame condition.
•
ET
Elapsed time since the test began running.
Injecting Individual BERT Errors
To inject individual bit errors into BERT payloads, press the
ENTER
key during
the BERT test. Each press of the
ENTER
key cause one bit to be corrupted in the
outgoing pattern. The top line of the LCD flashes the *
INJECT BERT ERR
*
message to indicate that the error was injected.
Note
You can automatically insert errors by selecting one of the rates for
the
Setup Error Inj
option when you set up the BERT test (see "Setting
Up a BERT Test" earlier in this chapter for details).
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