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Description:
Making Measurements
Measuring Error Analysis
Measuring Error Analysis
Analysis results conforming to G.821 and G.826 are provided. For Option 003 only,
analysis results conforming to M.2100, M.2110 and M.2120 are also provided.
G.821
Count and Ratio results of Errored Seconds (ES), Error Free Seconds (EFS),
Severely Errored Seconds (SES), Degraded Minutes (DM) and Unavailable Seconds
(UAS) are displayed for the following error sources:
Bit
FAS
CRC
E-Bit
In addition, an Annex D Errored Seconds ratio (when an unframed frame structure is
chosen on the
TX/RX Setup
result are displayed.
G.826
In-service, Near End and Far End results of Errored Blocks (EB), Background
Block Error (BBE), Errored Seconds (ES), Severely Errored Seconds (SES),
Unavailable Seconds (UAS) and a Pass/Fail result are displayed.
In addition, out-of-service results of Errored Blocks (EB), Background Block Error
(BBE), Errored Seconds (ES), Severely Errored Seconds (SES), Unavailable
Seconds (UAS) and a Pass/Fail result are displayed.
Path Allocation
The Pass/Fail result is based on preset threshold settings. If a threshold is exceeded,
a FAIL result is displayed.
When measuring over a part of a path the Pass/Fail thresholds need to be reduced
according to the percentage of the path being measured.
The path allocation percentage reduces the threshold on a pro-rata basis.
The following Pass/Fail thresholds apply to a path allocation of 100%:
• G.821 - ESR <0.08, SESR < 0.002
• G.826 - ESR <0.04, SESR <0.002, BBER 2 X 10
6-6
display), a Code Error Seconds count and a Pass/Fail
-4
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