Foundations Of Amateur Radio

Foundations of Amateur Radio One of the unsung hero components of a Software Defined Radio is the A/D or Analogue to Digital converter. Its job is to convert the analogue signal that's coming in via the antenna into a digital signal that is processed by software. I've talked about the difference between analogue and digital before and many explanations talk about converting things into zero and one. There are a few steps before that. Imagine a row of identical glasses, let's say eight. Grab a jug of milk and pour it into the first glass. Keep pouring until it's full. Now do the same to the second glass, rinse and repeat until you either run out of milk, or run out of glasses. You now have either a row of glasses full with milk and some spilled all over your desk, or you have some full glasses and some empty ones. Now if you were to mark a one on your logging paper for every full glass and a zero for every empty glass, you'll end up with a row of zeros and ones. Essentially you've converted an analogue si