Why is the PASS/FAIL displayed in OTDR different from PC software and the report?

The difference in PASS/FAIL results between the OTDR device and PC software is typically due to differing parameter settings. You should reset and align these parameters.

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why the PASS/FAIL displayed in OTDR is different from PC software and report?

August 28, 2026August 27, 2026 by Eric Yang - Technical Support

why the PASS/FAIL displayed in OTDR is different from PC software and report? Check these pictures.

OTDR pass fail parameter settings discrepancy analysis

OTDR PC software trace analysis parameter mismatch

OTDR test report parameter settings mismatch fail

This is because parameter settings in OTDR is different from PC software. Please reset paremeters.

OTDR Pass/Fail threshold settings fiber optic attenuation parameters

OTDR fiber optic pass/fail threshold settings

Eric Yang — Senior Technical Support Engineer

Eric specializes in PON network testing, OTDR diagnostics, and optical fiber monitoring solutions at FirstFiber Technologies.
✉️ Email: tech@firstfibertech.com

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Eric Yang — Senior Technical Support Engineer

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