U

UCC (Uniform Code Council), 241

UHF (ultra-high frequency) systems, 12, 123–124

antennas, 136

distance testing, 124–125

interference rejection testing, 127

power coupling, 4–5

power output analysis, 125–126

receive sensitivity testing, 126

restrictions by regions, 29–30

tag acquisition speed testing, 127–129

tags, 86–87

use-case testing, 129–131, 130

Underwriters Laboratories (UL), 246

Uniform Code Council (UCC), 241

Uniform Theory of Diffraction, 6

uninterruptible power supplies (UPSs), 185

Universal Postal Union (UPU), 235–236

Unsafe category, 247

upgrades, interrogator firmware, 31

UPM Raflatac, Inc., 266

UPSs (uninterruptible power supplies), 185

UPU (Universal Postal Union), 235–236

use-case testing, 129–131, 130

user interface in interrogators, 27–28

user memory, 92

UsingRFID website, 268