From here:

[Link: customer.xfinity.com]

Which DVR did they send you? Was it the Motorola RNG200? The manual is below.

[Link: media2.comcast.net]


See this thread that may have some codes in a link for you and mentions RF pairing on remotes. This came from a complete forums search for RNG200.

[Link: remotecentral.com]

You will find 4 threads in total.