The cat sensor does the work for you and keeps your cat safe. 1  With the Litter-Robot, maintenance is easy and infrequent. We recommend emptying the waste drawer once every 7-10 days for a single cat household, and more often if you have multiple cats.
It's simple. Radio waves travel unbelievably fastâat the speed of light (300,000 km or 186,000 miles per second). Analog radio. Ocean waves carry energy by making the water move up and down. In much the same way, radio waves carry energy as an invisible, up-and-down movement of electricity and magnetism.
Voice signals travel over phone lines at frequencies ranging from 0 kHz to 4 kHz. Standard modems use the same frequencies, but DSL uses frequencies between 25 kHz and 1 MHz. This extra bandwidth ensures that more data can be sent over the same line.