Back in the day before the digital conversion, when analog TV channels were actually on the channel number by which they called themselves, Channel 2 started at 54MHz, and Channel 83 had an upper edge of 890MHz.
A channel 2 signal would wrap around a pine tree in the line of sight from transmitter to receiving antenna and keep going, but said tree would stop Channel 83 stone cold dead.
(It's kind of like how you can run both channels into a single sub-woofer because those frequencies are so non-directional, but tweeters have to be designed for wide dispersion if you're going to be able to hear all of both the left and right speakers without having to be pinned to one exact spot, because the higher you go in frequency the more directional a waveform is.)