When we talk about Amplitude Modulation (AM) and Frequency Modulation (FM) in amateur radio, we’re really talking about two classic ways of riding information on a radio wave — and each one has its own personality. In AM, the strength of the signal goes up and down following your voice, while the frequency stays put. That’s why AM feels so nostalgic to many hams: it’s simple, it’s elegant, and you can actually hear how your voice shapes the signal. It’s also very forgiving when it comes to tunin

Narrow Band Frequency Modulation (NBFM) explained in a simple way to understand -- By Omka Kulkarni