VeEX OTDR FX150+ Series, Руководство пользователя

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OTDR Series e-Manual, D07-00- 076P -RevD00 Page 76 of 109
7.2 Thresholds (OTDR Setup page 2)
Threshold settings are available on
page 2
of the Setup tab. This allows you to preset and
enable measurement thresholds. Events will be placed into the table only if the Analysis
threshold is met/exceeded. Events that fail to meet the Pass/Threshold will be flagged and
highlighted as red in the event table.
7.2.1 Analysis Thresholds
OTDR Setup page 2: Analysis Thresholds
Events that exceed the Analysis Threshold settings are reported in the Event table. These
parameters include:
•
Splice Loss (dB) - The setting range for this parameter is 0.01 dB to 9.99 dB in 0.01 dB
increments. The default value is 0.020dB.
• Reflectance (dB) - Defines the lowest Reflectance value that will be reported by the
analysis. The setting range for this parameter is -70.0 dB to -20.0 dB in 0.1 dB
increments. The default value is-65.0dB.
•
Fiber End (dB) - Defines the value which will be reported in the Events analysis. The
setting range for this parameter is 1 dB to 99 dB in 1 dB increments. The default value
is set to 20dB but for non-PON spans, a 3dB value is recommended.
•
Macrobend (dB) - Defines the detection value with a default value 0.200dB.
A non-reflective event will be reported as a macrobend if its loss at a longer wavelength
exceeds its loss at a shorter wavelength. Macrobend detection requires at least two
singlemode wavelengths being tested - 1310 nm and another either at 1550 nm or 1625
nm. The range for this parameter is 0.3 dB to 2 dB in 0.1 dB increments. The default
value is 0.2dB
• Default Settings : Resets Analysis Thresholds to factory defaults.
•
Show Fiber Sections
– Shows fiber section in event table.