For some reason I can't find any satisfying answers to my questions on the internet. 1. Are mostly all remotes, phones, wifi, etc. using wireless digital transmission? If so, why does a wifi signal get weaker when you move further away? The inverse square law shouldn't apply to a digital signal as long as it makes it to the receiver, right? 2. Do digital transmissions only require one specific frequency rather than a range of frequencies like analog? For example, you could just send pulses at 800Mhz exactly and have your receiver set to the same frequency. 3. Are wireless digital transmissions always encrypted in some way? If so, is there anyway to get the codes? For example, if i wanted to build a receiver (other than the TV) for my Samsung TV remote, could I? Or would Samsung keep that info secret? 4. What is the best way to read a wireless signal? Say i wanted to know the binary signal sent from my remote when I press a specific button, how could I read out the binary digits? Thanks a bunch!