Full-feature optical time domain reflectometers (OTDR) have which of the following options?

Full-feature optical time domain reflectometers (OTDR) are sophisticated tools used for testing and analyzing fiber optic networks. One of their key capabilities includes measuring parameters that impact signal quality over fiber, such as chromatic dispersion and polarization mode dispersion (PMD).

Chromatic dispersion occurs because different wavelengths of light travel at different speeds through fiber, leading to signal distortion over long distances. PMD refers to the differential delay of modes causing similar types of distortion in the signal. A full-feature OTDR equipped with modules for measuring these parameters can provide precise assessments of fiber optics, helping technicians identify issues that could impact network performance.

This advanced functionality is integral for maintaining high-quality communication in fiber networks, making it a critical feature of full-feature OTDRs. The presence of these specialized modules directly contributes to the overall reliability and effectiveness of fiber optic systems, which is why this option stands out as correct.

While other features like digital signal processing, enhanced data storage, and advanced error correction are valuable in the context of fiber optics, the specific mention of chromatic dispersion and PMD underlines the particular analytical capability that is unique to full-feature OTDRs.