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It’s no secret that Las Vegas has more security guards than New York City has taxi cabs. All Las Vegas security guards have a two-way radio that they carry as part of their uniform. A security guard without a radio is like Barney Fife without a bullet in his upper-left pocket.
The casino security and surveillance departments use aerial repeaters that amplify the signal to their security guards’ two-way radios. Signals that don’t have the benefit of being boosted with repeaters are to signals that do have the benefit of repeaters as your mom yelling at you at the top of her lungs is to your mom using a megaphone.
But wait, there’s more. Because of the size of a casino property, the security radios need even more of a boost than just the repeaters. Enter the distribution amp. This is comparable to taking a five-watt stereo and adding a 5,000-watt booster.
Now, here’s your answer. So that that the security guards never have a blind spot where they can’t hear or send radio transmissions, on every floor of a big casino’s parking garage is a distribution amp. (The same is true for all the elevators.) The unexpected benefit to satellite-radio buffs is that the repeaters and distribution amps boost the signal to car satellite radios as well.