Here’s how you uniquely address two HR20 remotes, or use one remote to control two units. This works for both the HR20-100 and HR20-700 units – one of each or two of either.
On unit #1 you leave setup normal, you might need to cover the IR front panel or unplug the unit so you’re only controlling unit #2. Unit #1 will be controlled with the remote slider in the “DIRECTV” position.
1) Now, that you’re only controlling unit #2 go to Menu > Settings > Setup > Remote > Receiver Mode and you will see either DirecTV or AV1/AV2, select AV1/AV2, at this point the remote will no longer control the unit so go to the front panel and select “Done.”
2) Now take the remote you want to use to control unit #2 and move the slider to AV1. Hold down the “Mute” and “Select” button until the green light flashes three times then enter 00003 on the keypad and the green light should flash twice to confirm the entry. Now, with the slider in the AV1 position it will only control unit #2.
Essentially, step 1 tells the DVR to listen to 00003, and step 2 tells the remote to use 00003 on the AV1 position. So if you want to just have two remotes, each controlling its own DVR, then you can set each remote to be used in the DirecTV position, and just change the code of the second one to 00003, and change the corresponding DVR to AV1/AV2 and it’ll only see that remote.
Thanks Nick!