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UHF Ultra High Frequency. (300 to 3 000 MHz) | |
UPS Uninterruptible Power Supply. | |
USB Upper Sideband mode of emission. A form of single sideband emission where only the upper sideband is transmitted. | |
UTC Temps Universel Coordonné (French). Coordinated Universal time (replaces Greenwich Mean Time (GMT) for practical purposes). | |