channel mapping is usually done by the m.s.o.  when they need to assign either more h.d. or just realign certain freq. cause of issues like camera's out in the field , this is done in their H.E.  the receivers in the home do the work. I have never seen a t.v where you can change or map the freq.  depending on the bandwidth of the tuner they must be in fcc reg.  in other words .
 ch. 2  55mhz.  to however high the tuner goes. 6 mhz wide
    
    Re: frequency to channel mappings....
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