a These levels are based on Estimated Energy Requirements (EER) from the Institute of Medicine Dietary Reference Intakes macronutrients report, 2002, calculated by gender, age, and activity level for reference-sized individuals.
The definition of a channel is a waterway, a means of communication and a specific television or radio frequency. An example of channel is the English Channel. An example of channel is writing. An example of channel is Fox News.
When we talk about the frequency of a radio or TV broadcast, that means the number of cycles per second. 1 cycle per second has the arcane definition of Hertz. The term channel is an artifact used to group a fundamental frequency and it harmonics into a single category. The numbers 2, 3, 4, ... 1000 plus are rather arbitrary TV channel numbers. But each one signifies a specifically assigned fundamental frequency and its harmonics.