DirecTV HR20 User Manual page 104

System Setup
IR/RF Setup
Certain remote control models feature RF (radio frequency) capability. Refer
to the model number printed on the top left corner of your DIRECTV Remote
Control. Look for the letter(s) "R" or "RB" at the end of the model number,
which indicates that the remote supports radio frequency.
If you have a remote with RF capability you can change the remote's signal from
Infrared (IR) to RF. While the IR signal requires a clear line of sight to the front
of the receiver, RF signals let you put your receiver inside a cabinet or behind
solid doors and still be able to command it from up to 200 feet away.
Note:
Not all DIRECTV Receivers are RF-capable.
Receiver Mode
Select "Receiver Mode" if you want to use one remote to command a second
DIRECTV Receiver.
®
Advanced Setups
Use this option to set up your remote to control 3 or more receivers in one
room.
DIRECTV DVR
® USER GUIDE
104