Wise TSW200E1, Manual

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TSW200E1
measurement (AVAILAB. SEC.) and the total elapsed time. The available seconds are
given by the difference between the total measurement time and the available time.
•
UNAVAIL. SEC: indicates the rate between the unavailable seconds and the total
elapsed time. The unavailable time is defined when the bit error rate, measured in one-
second intervals, is over 1.10
-3
for 10 consecutive seconds.
•
ERR. FREE SEC: indicates the rate between the number of one-second time intervals
that have no error and the available measuring time.
The TSW200E1 calculates parameters according to ITU-T Rec. G.826. These parameters are
shown in the two screens displayed below.
F1 F2 F3 F4
ITU-T NEXT
G . 8 2 6
BLOCKS = 4.15E+02
ERRORED BLK = 0000000
BKGD BLK ERR = 0000000
ERRORED SEC = 0000000
SEV. ERR. SEC = 0000000
The parameters are now described.
•
BLOCKS: Counter that indicates, in exponential notation, the total number of 2048-bit
blocks received when the test is running.
•
ERRORED BLK (EB): indicates the total number of errored blocks flagged when the
test is running. The block error is associated with the occurrence of CRC error. Any
number of wrong CRCs flagged in a 2048-bit block is marked as a single errored block.
•
BKGD BLK ERR (background block error): indicates the total number of errored blocks
in which there were no SES (severely errored second).
•
ERRORED SEC (ES): shows how many one-second time intervals have at least one of
the following errors:

FAS, EB, LOS (loss of signal), AIS or LOF (FAS loss).
•
SEV.ERR. SEC: displays how many one-second time intervals had more than 30% FAS
or EB errors. Or if there occurred any of the alarms LOS, AIS or LOF.
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