What effect does increasing the pulse width on an OTDR have?

What effect does increasing the pulse width on an OTDR have?

• A. The OTDR's range decreases
• B. The ability to distinguish closely spaced events increases
• C. The OTDR's range increases
• D. The measured distance is more accurate

Answer: (C)

Increasing the pulse width on an Optical Time Domain Reflectometer (OTDR) directly affects the device's ability to obtain data over a longer distance. A longer pulse width means that the OTDR emits a broader burst of light which can travel further before being reflected back. This increased pulse energy allows the OTDR to maintain signal strength over longer distances, thus extending its operational range. In terms of resolution, while a longer pulse width can enhance the ability to gather data from further points in a fiber, it can also cause closely spaced events or faults to merge, making them difficult to distinguish. Therefore, the range advantage gained is why this option is the correct choice. Options suggesting increased accuracy or heightened resolution in distinguishing closely spaced events pertain to the benefits of a shorter pulse width. Thus, while a longer pulse width excels in range, it indeed comes at the potential cost of reduced resolution for small-scale events.

Increasing the pulse width on an Optical Time Domain Reflectometer (OTDR) directly affects the device's ability to obtain data over a longer distance. A longer pulse width means that the OTDR emits a broader burst of light which can travel further before being reflected back. This increased pulse energy allows the OTDR to maintain signal strength over longer distances, thus extending its operational range.

In terms of resolution, while a longer pulse width can enhance the ability to gather data from further points in a fiber, it can also cause closely spaced events or faults to merge, making them difficult to distinguish. Therefore, the range advantage gained is why this option is the correct choice.

Options suggesting increased accuracy or heightened resolution in distinguishing closely spaced events pertain to the benefits of a shorter pulse width. Thus, while a longer pulse width excels in range, it indeed comes at the potential cost of reduced resolution for small-scale events.