Radio Technology all around!

Also, two way communication is not limited to just this – there are lot many dimensions to it. We have definitely heard of the AM and FM Radio technologies, that is, the Amplitude Modulation and Frequency Modulation. Channels are assigned to the popular radio stations, but for personal use, people usually use frequency numbers instead of channels. There is a memory in these devices which tracks down your frequently used frequency. For personal use a UHF or Ultra High Frequency if sufficient because it has a shorter wavelength and is more appropriately used for a single building etc. the VHF or Very High Frequency is used for extensive reach requirements.