(a) a tuner operative at each of a plurality of local oscillator frequencies, (b) for each local oscillator frequency FLO of the plurality, the tuner having spectrum coverage within a range of frequencies offset from that FLO by a range of frequencies from about F1 to about F2, (c) wherein (1) F1=k(F2???F1); and (2) k is an integer greater than zero, and (d) wherein each of the plurality of local