FM stands for Frequency Modulation. It means that the RF-frequency will change according to the input audio signal. Example: A FM radio signal at 105.1MHz will not be exactly stable at 105.1MHz, The audio signal in the RF will modulate (change) the frequency for about...
Single Sideband Suppressed Carrier (SSB-SC): Single Sideband Suppressed Carrier (SSB-SC) modulation was the basis for all long distance telephone communications up until the last decade. It was called “L carrier.” It consisted of groups of telephone...
What is Single Side-band? Before you can understand what SSB is, you must understand how audio is transmitted via radio waves. The method by which audio is impressed on a radio signal is called modulation. The two types of modulation that most people are familiar with...
Quadrature Amplitude Modulation (QAM)- Brief Discussion I & Q modulation, A.K.A., QAM, is a method for sending two separate (and uniquely different) channels of information. As you know, the carrier is shifted to create two carriers: sin and cos versions. The two...
