A TV analogy would have to be the interviewer asking the last few programmes you watched, as your TV can't display more than one channel at a time. You can, however, have many pies in the oven at once.
But I don't actually understand what you mean about detuning all the channels. Once you've got the channels tuned in, they stay tuned in regardless of power supply. At least, they used to – perhaps TV sets have "progressed" in the ~18 years since I last had one!