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Forum Discussion
Mid/High-Split modems affecting TV Cable Pixels Reception?
This past year, I was using the Xfinity XB8 modem which utilized the newer enhanced Xfinity Mid/High-Split spectrum (32x8) allocation in DOCSIS. As advertised saw my upload speed go to over 120 Mbps...
Thanks for the info, appreciate your comments. I did try reducing all the split lines and just having one split going to the cable modem and one split directly to a TV. Had the same pixelation result. Also noted that have had no issues for 20+ years, until I installed a 32x8 cable modem on the network.
Would try the non split line up to the TV STB to check that.
Hopefully the on site tech will find the problem.
You can post the CM modem connections and event logs data pages here if you'd like us to check them out for you:
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-router
As you have shown, not all of the Xfinity set top boxes (STB) or satellites play nice with the upstream OFDMA signals being transmitted from the mid-split modems.
Determine the model number of your STB and check with an Xfinity store to see if a newer version is available that is less susceptible to interference from the mid-split modems. You could also have a faulty STB.
Kitsap, that is a good idea. Wish the cable provider would be more upfront as to which setup boxes can cause this problem. I have had great difficulty getting and understanding to this issue, and any acknowledgement from the ISP that the issue exists.
