Actually....most, of the remotes send out IR and UHF at the same time.
You are misunderstanding my comment.
Dish remotes only send out UHF to Dish Network receivers, they do not send out UHF to TV sets, A/V receivers, VCRs, etc.
I did not say anything about IR to Dish Network receivers. All Dish UHF remotes except the earliest ones, also send out IR to Dish Network receivers.
PS The switch inside the battery compartment of a 6.3 switches from UHF Band A to UHF Band B.