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Extending RF Range of Comcast X1 Remote XR11
This thread has 2 replies. Displaying all posts.
Post 1 made on Thursday January 5, 2017 at 23:09
Long Time Member
June 2002
Hi all. I am trying to find a solution to extend the range of a Comcast X1 remote model XR11. My cable box is two floors below the TV. A Crestron system controls the remote control heavy lifting, but AFAIK there is no way to initiate a Comcast voice search using a Crestron remote, so I'd like to keep using the XR11 for that. Unfortunately the cable box is too far away.

I have read that the X1 remote uses the ZigBee RF4CE to communicate with the cable box, and the voice search uses voice-over-RF4CE. The chips are from Texas Instruments. Does anyone know of a solution (like a repeater or range extender) that I can put halfway between cable box and the TV to facilitate the remote communicating with the cable box? Or a device that I could install where the TV is and connect via Cat5 run to the cable box? Or a way to get Crestron remotes to enable voice control (although I realize that this is the wrong forum for that last one).

Post 2 made on Sunday June 17, 2018 at 23:31
Junior Member
June 2018
Were you able to find a solution for this? I'm in a similar boat.
Post 3 made on Monday July 9, 2018 at 01:15
Ernie Gilman
Yes, That Ernie!
December 2001
I was once able to increase the RF range of Marantz RC5200 remote control systems using a passive antenna, using two slightly different approaches.

I found out what the operating frequency of the remote was. Zigbee has various different frequencies, so you'll have to find out the frequency for what you're using.

I built two ground plane (monopole) antennas cut to the right length for the frequency. To do this, I took a piece of RG6 and removed the jacket, shield, and dielectric from a quarter wavelength of the inner conductor. I worked out some other pieces of wire to be the ground plane.

One of these was mounted near the component that was furthest from the RF receiver. An RG6 went from there to the RF receiver, and I placed the antenna within a few inches of the RF receiver. The positioning of things basically doubled the remote range.

The other one was used simply to get a long range in the rest of the house. Since the Marantz control was unidirectional, I could add an RF amp to make the whole thing more sensitive. Your cable remote wouldn't happen to work if it didn't get feedback from the cable box, would it?

Those are the ideas that worked with that product. Maybe this can be done with Zigbee, too.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw

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