Foundations Of Amateur Radio

Foundations of Amateur Radio As a quick recap of what I've discussed before, a Software Defined Radio is a tool that essentially measures the voltage at the base of an antenna system and sends that to a computer for processing. The faster you measure, or sample, the better the representation of what's coming in via the antenna. The traditional view is that you need to sample at least twice as high as the highest frequency you want to represent. You may also recall that an antenna system doesn't just receive a single frequency, the one your radio is tuned to, but all frequencies. So, if you need to build a software defined radio from scratch, your first question might be: What do I want to listen to?, followed by: Which sample rate do I need? If we were to answer the first question with HF, say up to 50 MHz, the answer would be something like a sample rate of 100 MHz, so you can capture any signal up to 50 MHz. So, twice the highest frequency as the one you care about, that's the short way of waving your