http://www.saveourgps.org/Testimony_of_Jim_Kirkland.aspxRecently, the Federal Communications Commission (FCC) conditionally approved an application for a waiver allowing a company called LightSquared to repurpose the satellite spectrum immediately neighboring that of the Global Positioning System (GPS) for use in extremely high-powered ground-based transmissions. In doing so, the FCC waived its own rules, acting with unusual speed. The section of spectrum at issue is in the L Band 1 (1525 - 1559 MHz) and is immediately adjacent to the GPS section (1559 - 1610 MHz).
Oops, looks like the folks at FCC really haven't got much of a clue when it comes to Out of Band frequency performance of Chinese made Circulators and Isolators (to be used in the Lightsquared cellular network) etc.
The frequency domain performance of these devices is only as good as the calibration of the Microwave Network Analyser at the factory and the mechanical/thermal stability of the rubber cement/ceramic squirted under/into the terminals of these devices by the Chinaman sitting in front of the Analyser.
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