Methods to increase headroom can involve screening. Patented 2-pair foil system used by Draka UCDataÂ® deliver the ultimate level of screening required. As written in the standards, the test for Alien Cross-talk is unnecessary for screened cables with good screening attenuation performance.
Physical separation was mentioned earlier as a method of lessening effects from coupling signals. Using creatively shaped jackets are possible methods to decrease signal interference, however the interference is still relatively significant. Decreasing the expected signal interference might be successful in the lab but is installed cable truly within safety margin in real project environment?
The patented Draka Technology: ZEBRA (Zero Earth-loop By Reflectorfoil Application)
We understand how screening functions and is a leader in this market sector. The world market is however U/UTP. With our ZEBRA technology Draka combines, for the first time, advantages of screened protection in an unscreened cable.
â€¢ protected by closely placed foil segments
â€¢ short foil segments avoid antenna effect
â€¢ avoidance of loop currents by segmentation isolation
Source: Technical MMS Asia