Refurbished Nettest PMD440
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Refurbished
| Polarization Mode Dispersion System
Polarization Mode Dispersion, or PMD, is a form of pulse dispersion which can cause the optical receiver to be unable to interpret the signal correctly and result in high bit error rates. PMD can dramatically decrease a fiber optic network’s performance, particularly those networks operating at high data rates such as OC192 (STM-64) or OC768 (STM-256). In addition to the inherent, random polarization properties of fiber, stress and other environmental effects (such as changes in temperature) will directly affect the severity of PMD, causing it to change over time. In fact, the amount of PMD present when a fiber is first drawn is likely to differ from the PMD present after cabling or placement. PMD’s varying nature makes it crucial to test installed fiber before upgrading to higher data rates or installing new high data rate systems. Features and Benefits: - Measuring distance of up to 200 km - Inherent accuracy and speed of Interferometric measuring method - Easy-to-use single button testing - Allow customers to provide a high data rate on fiber - Provides pre-qualification of existing spans for upgrades - Certify cable quality and verify installation practices |
Nettest PMD440 datasheet & specifications
