VeEX OTDR FX150+ Series, Руководство пользователя

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OTDR Series e-Manual, D07-00- 076P -RevD00 Page 70 of 109
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Compensated Loss (dB) : For OTDR with built-in internal launch fiber, (G.657), the
OTDR connector insertion loss will depend on the fiber type connected to the test set.
Mismatched fibers can result in higher panel loss than expected connector loss. Use the
Span button to enter fiber mismatch compensation. Mismatch fibers should not impact
Reflectance.
7.1.3 Auto mode
To set OTDR test parameters automatically, select Auto Mode under Test Parameters . In this
mode, the OTDR performs a short measurement and analysis of the fiber and automatically
determines optimal test settings. This process typically takes less than 5 seconds.
Auto mode is intended for inexperienced operators and only uses single pulse/wavelength.
However, the user must still specify if they are testing point-point or a point-to-multi-point
network which are typical of PON and RFoG networks. In Auto mode, the user can only set the
test wavelength/s. Distance Range, Pulse Width, Resolution and Measurement time are set
automatically by the unit.
• Test Wavelength/s
• (singlemode, multimode, singlemode live or filtered (1625 nm or 1650 nm))
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PON Type
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Not a PON
(point-to-point)
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Manual PON
- 1st Splitter and 2nd Splitter (1x2, 1x4, 1x8, 1x16, 1x32, 1x64, 1x128,
2x2, 2x4, 2x8, 2x16, 2x32, 2x64, or 2x128)
For information on defining splitter loss values, see
7.2.1 Analysis Thresholds
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• Auto PON - Used only if user does not know their PON configuration
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Fiber properties
- Refractive Index and Backscatter coefficient as provided by cable
manufacturer
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Auto Zoom Trace – Auto scale viewing window at end of test.