IIRC this receiver has a IR receiver for the TV1 and a RF receiver for TV2.
I guess the question is why do you want a UHF remote for the first TV? If its a matter of range or obstructions there do seem to be IR repeater products out there that may solve your problem. I saw one the other day (while looking for an RF blaster which apparently does not exist) that converts IR signals into RF and then back again.