Our bse band signals are less than 40kH. They are sent over incredibly noisy skywaves.
I want all my samples taken at 8 Mz with 6 bit accuracy for a long pipeline of 32 bit processors. I have the dynamic range matched to cost, Moore's Law and flexibility. All my DSP is working a 4Mhz bandwidth. Give me an accurate multiplier on the input to down convert to the 8MH range.
Everything simplifies, we are all focused on a dsp with the sme bandwidth, resolution and dynamic range. The codes never change when we swp frequencies. All your work speeds up.