Mengoperasikan OTDR (Optical Time Domain Reflectometer) - Teknik Jaringan Akses Telekomunikasi

Summary

This instructional video demonstrates the use of an Optical Time Domain Reflectometer (OTDR) to measure fiber optic cables. It covers the essential tools and safety measures, including fiber optic cleaners and protective glasses. Step-by-step, the video guides users through the setup, calibration, and operation of the OTDR, explaining how to interpret the measurement results, such as event type, distance, attenuation, and link loss. The session concludes with a brief summary of the test results, highlighting the effectiveness of the fiber optic link tested.

Takeaways

• 😀 OTDR (Optical Time Domain Reflectometer) is used for measuring fiber optic cables and detecting faults or performance issues.
• 😀 The primary objectives of this training are to understand the OTDR's function, how to operate it, and what potential issues to avoid during measurements.
• 😀 Key tools required for OTDR measurements include the OTDR device, vescore adapter, fiber optic cleaner, and safety glasses.
• 😀 Cleaning the fiber optic connectors properly before measurements is essential to avoid any interference or inaccurate results.
• 😀 After cleaning, ensure the connectors are securely attached to the OTDR and the fiber optic link with a click sound confirming the connection.
• 😀 The OTDR must be set up with the appropriate parameters, such as wavelength (1310 nm), measurement mode (e.g., real-time), and distance (e.g., 500 meters).
• 😀 Pulse width and Index of Refraction (IOR) must be configured correctly for accurate results. A typical IOR value is 1.46 for standard fiber cables.
• 😀 The OTDR displays key metrics such as event type (reflective or non-reflective), distance to faults, attenuation, and link loss.
• 😀 Attenuation values should be within the standard limits (0.375 dB/km for 1310 nm), with lower values indicating good fiber quality.
• 😀 After testing, ensure all equipment is powered off and stored properly to maintain its condition and ensure safety.
• 😀 The OTDR provides essential insights for fiber optic maintenance, and following the proper setup and safety protocols ensures accurate, reliable measurements.

Q & A

What is the purpose of the OTDR measurement in this training?

The purpose of the OTDR measurement is to train participants on how to operate the OTDR, understand its function, and learn the key considerations and potential issues when using the device for fiber optic link testing.

What are the essential tools and materials required for the OTDR measurement procedure?

The essential tools and materials include the OTDR device, a fiber optic patch cord, a fiber optic cleaner, safety glasses, and the fiber optic link to be tested.

Why is it important to clean the connectors before starting the OTDR measurement?

Cleaning the connectors is important to prevent any dirt or contamination on the fiber optic connectors, which can interfere with accurate measurements and damage the equipment.

What should be done after connecting the OTDR to the fiber optic link?

After connecting the OTDR to the fiber optic link, the cable should be neatly arranged, and the ends of the link should be closed off to prevent any interference with the measurement process.

How do you ensure a secure connection between the OTDR and the fiber optic link?

A secure connection is confirmed by hearing a 'click' sound when the connector is properly inserted into the adapter, indicating that the connection is solid.

What are the key parameters to set on the OTDR before starting the measurement?

The key parameters to set on the OTDR include the wavelength (λ), the measurement mode (AV-Test), the maximum distance (500 meters), the pulse width, and the index of reflection (IOR), which is typically set to 1.46 for standard cables.

What is the significance of the pulse width setting in OTDR measurements?

The pulse width setting determines the length of the light pulse sent through the fiber. A longer pulse width is typically used for longer fiber links to ensure the signal can travel the distance and reflect back for measurement.

What types of events can the OTDR detect during the measurement?

The OTDR can detect two types of events: reflective events and non-reflective events. These events indicate the presence of issues such as fiber breaks, connectors, splices, or other impairments in the fiber optic link.

How is the distance to a fault or break in the fiber optic link determined?

The distance to a fault or break is determined by observing the 'distance' column in the OTDR results, which shows the length of the fiber link and where any issues or faults occur along the cable.

What does the 'attenuation' value represent in OTDR results?

The attenuation value represents the loss of signal strength as light travels through the fiber optic cable. It is measured in decibels per kilometer (dB/km), and the standard value is 0.375 dB/km at 1310 nm wavelength.