EXFO Optical Time Domain Reflectometer Advanced Settings

EXFO OTDR advanced settings allow full control over pulse, wavelength, and acquisition parameters to optimize fiber characterization and trace analysis. Trace Acquisition ModesEXFO OTDRs, such as the FTB-700 series, offer two primary acquisition modes: Auto Mode: Automatically calculates fiber length, sets acquisition parameters, acquires traces, and displays event tables. This mode is ideal for quick measurements or when minimal user intervention is needed ( ).

Advanced Mode: Provides full control over all test parameters, including pulse width, wavelength, and acquisition time. This mode is essential for detailed fiber characterization, low-loss splice detection, and precise event analysis ( ).

Pulse and Wavelength Settings

In advanced mode, users can manually select: Pulse Width: Adjusting pulse width affects resolution and dynamic range. Short pulses provide higher resolution for closely spaced events, while longer pulses increase dynamic range for long fibers. Wavelength Selection: OTDRs often support multiple wavelengths (e.g., 1310 nm, 1550 nm).

Advanced settings allow sequential testing at different wavelengths to characterize fiber attenuation and dispersion ( ).

Acquisition Parameters

Advanced settings include: Acquisition Time: Users can set the integration time for each trace, balancing speed and signal-to-noise ratio. Sampling Resolution: Determines the number of points per trace, with finer resolution (e.g., 4 cm) providing more detailed event detection ( ). Optimized Range and Pulse: The OTDR can suggest optimal settings based on fiber length and characteristics, which can be manually overridden in advanced mode ( ).

Post-

Processing and AnalysisEXFO OTDRs support advanced post-processing features: Event Characterization (EC): Allows bidirectional analysis by combining traces from both directions to improve accuracy of splice and connector loss measurements ( ). Reference Traces: Users can set a current trace as a reference to compare future measurements, useful for monitoring fiber degradation over time ( ). Template Mode: Enables testing against a predefined reference trace to quickly identify deviations or faults ( ).

Display and Measurement Customization

Advanced settings also allow: Trace Display Options: Linear or logarithmic views, grid adjustments, and event table customization ( ).

Span Start/

End Configuration: Users can define the start and end points of the fiber span for focused analysis ( ). Measurement Settings Modification: All parameters, including wavelength, pulse, and acquisition time, can be adjusted for each measurement session ( ). By leveraging these advanced settings, technicians can achieve high-precision fiber characterization, detect low-loss events, and perform comprehensive OTDR analysis tailored to specific network requirements.