VIAVI Solutions Case Study Zeroing in on an Interference Source with VIAVI InterferenceAdvisor and AntennaAdvisor The Challenge A Tier-1 US service provider in Nashville, TN, was suffering from a bad case of Music City blues due to the sudden appearance of a rogue interferer. Several downtown macro sites around Bridgestone Arena, home of the NHL’s Nashville Predators, abruptly started reporting high noise on Physical Resource Block (PRB) 19. Using OSS data, the team identified the cells and sectors affected by the interferer, but couldn’t determine the direction of the source precisely. The signal even showed up on all 3 sectors of one site at about the same level, which is not surprising due to dense urban surroundings, with many buildings to reflect the RF signals. The S

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