Foundations Of Amateur Radio

Foundations of Amateur Radio Today we enjoy radio using all manner of different so-called modes. The ones that most people are familiar with are FM and AM. In fact digital radio DAB+ is another example of a mode. In Amateur Radio we have a few more to play with, Single Side Band, or SSB, countless other digital modes, CW, or Carrier Wave are all different approaches to getting information from one place to another. If you have a radio that uses SSB, you'll soon notice that there are two versions of SSB, something called LSB and something called USB, or Lower and Upper Side band. If you tune around the bands you'll soon notice that some stations are using Lower Side Band and others are using Upper Side Band and there seems to be no rhyme or reason to it. Actually, there is a method to the madness. First of all, commercial and military HF radio all use Upper Side Band all the time. Radio Amateurs are a bit more traditional and we have the following basic convention. For voice signals on frequencies lower th