In software defined radio (SDR) I often see sample rate and bandwidth interchanged or maybe I'm misunderstanding... If an sdr can sample a 2 MHz wide slice of rf spectrum does that imply it would be sampling at 2 million samples per second (2M S/s)? And if so what about bandwidth - is the implied bandwidth 2MHz? The particular sdr I am thinking of is the rtl2832u.
I'd like to understand if sample rate and bandwidth are tied together and if not how are they defined in terms of this or other sdr.