Hi. I would like to have a device that would modulate analog signal by Frequency Modulation. I know there are a lot of devices like this, but, I need to make it so that you can switch between 333MHz and 433MHz programatically/electronically, during runtime, without a need to rewire something, etc. Is there such a device ? And how hard is it to make one myself ? Thank you for your help.
EDIT: Perhaps the best would be a device in which you put ANY clock source as carrier wave, and analog value, and it magically spits out modulated signal.