I just took a Sales Rep job at a company that is a distributor for remote transmitter and receivers for the access control industry (garage, gates, doors, etc...). Most of our stuff is ready made for the end user market. I want to learn about the underlying technology. When I try to google it, most of what I get is for FM radio broadcasting (not really what I am looking for). I am not completely dumb. I know the difference between 318 MHz and 390 MHz transmitter is the amplitude of the signal it sends, but that is about the extent of my knowledge. I don't know what sends it (other than it is a "transmitter"), and I couldn't make one if I wanted to (and I want to).
Where do I start? What classes do I take at the community college? Are there online tutorials to get started with this kind of stuff?
Thanks for any suggestions.
-Matt