PCM or Fm
Hello everyone, I am just a beginner and I was wondering if anyone knows of a good website that explains the differences in AM, FM, and Pcm? I am just wanting to learn for future reference because when I go to buy another plane, I will probably get a new radio that will last me for years. I have heard that the futaba 9c is a good transmitter, but I have also heard about PCM- whatever that is? If anyone has any info let me know.