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 Now, we continue the long list of FCC historic spectrum management mistakes that began with Part 1 of this blog series. 6. Nextel (1990s). Back when it all began they were known as “Fleetcall,” but their real intention became apparent with the re-naming of the company after a few years. Their mission: to construct a [...]  LightSquared apparently has dodged a GPS bullet that almost shot it down before it started up. It will switch to another spectrum that virtually eliminates interference with Global Positioning System receivers. Early tests by the Reston, Va., 4G network provider indicated that one 10-megahertz spectral block of its Long Term Evolution (LTE) open wireless broadband [...]  The rollout of 3G networks across the country is old news with the recent announcements by Verizon, AT&T, and others to rapidly deploy 700 MHz 4G LTE this year throughout the USA. These high speed networks are slated to grow with ten’s of thousands of new towers and antennas, and to employ novel digital modulation [...]  Engineering consultant Richard Arsenault says the biggest problem for AM reception during the daytime “is no longer interference between stations”, as it was when the AM service was established decades ago. The former station owner and consulting engineer says the threat is now “interference from electronic devices and power lines”, and it’s steadily getting worse. [...]  Cisco recently performed an on-line survey about RF interference and Wi-Fi network usage with 600 participants from industries such as agriculture, education, arts, manufacturing, retail, healthcare, and many others. 78% of companies now consider all or part of their wireless network to be mission critical. 54% of companies indicated that RF interference causes wireless network [...]  It has become increasingly popular to install bi-directional amplifiers (BDA’s) and distributed antenna systems (DAS’s) to overcome problems of cellular and other wireless coverage within buildings. Properly engineered, and coordinated with the cell cos being retransmitted these can greatly help in overcoming building problems. However, these systems are readily available, and are increasingly being installed [...] Who would have thought that oil wells could interfere with cell towers? Yet, in the bizarre world of RF interference – it happened! The FCC Los Angeles Office received a complaint of interference to the reception of Sprint cell towers in Long Beach, [...]  At the production test facilities of a major circuit fabricator, it was dance time – all the time! This company fabricated garage door openers by the thousands, and put them through their paces on a neat row of test positions. The problem was, one tester would open his “door”, and his neighbor’s “door” would go [...]  There are several proactive steps to coping with external RF interference that start with selection of the facility design. An RF survey of a new location or problematical facility is a first step. An LBA NARTE Certified Electromagnetic Compatibility Engineer will visit the location and inventory potential on and off site RF interference sources. He [...]  Diagnostic tests are an invaluable tool in identifying patient problems. The results must be accurate if the diagnosis is to be correct. The tests are often too expensive to be repeated, and facilities are in too high demand to tolerate scheduling changes to accommodate repeat procedures. This is particularly so if they are due to [...] From what I have been able to observe, the “driver” for establishing the new data service may have come directly from the White House. There it may be the case that some big-hitter campaign contributors got to the administration, or it may be the case that they were convinced by “experts” that BPL was the [...]  Recently, the Federal Communications Commission adopted Rules for a new type of consumer-oriented Internet/World Wide Web data service, known as Broadband over Power Lines (BPL). This new service is intended to provide an additional means of consumer access to the Internet, supplementing existing data services now carried by telephone lines, cable television systems, fiber optic [...] |
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