This is being solved by using two different brands of TV and swapping out the existing Motorola cable boxes, putting in Spectrum 110 cable box or Spectrum 210 DVR. Those are controllably by RF.
So the remotes of the Spectrum units will be all I need to control both combo TV+cableboxes.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
