My XG1v4 4K Cable Box Recordings are pixelating

@XfinityJosephA on Dec 30 a technician visited me.  He noted that the incoming signal level was -13 dB.  When he left it was +1 dB.  To accomplish this he replace the drop cable, installed a new grounding block with a MoCa filter and replaced a gold-plated feedthrough at the wallplate with a nickel-plated 3 GHz (blue color insulator) feedthrough.  That night I recorded two shows and watched them.  Unfortunately I observed pixelation, ghosting, and freezes five to six times throughout the recording playback.  I feel I can improve the signal some more but I lack sufficient knowledge about recorded content.  Where does it come from and how is it generated?  Is the streaming frequency converted by the X1v4 DVR box whereas standard broadcast signals are at a different frequency.  I have 1 gig internet service and 4K broadcasts are not a problem.  It is only Xfinity DVR recored programs that are a problem.  The Rose Bowl parade was a particular mess of pixelations, freezes and ghosting.  Your thoughts please.

Thank you for your feedback and for letting us know your experience @tnt325. Having any type of issue such as you described while trying to enjoy your recordings and after our expert tech was there would be frustrating. I know I would be looking for a resolution if I was having these issues too. 

From what you were explaining to us about the issue only happening Rose Bowl parade might mean it was an issue with the broadcasting of that show. Have you been having this issue on all of your recordings and networks? 

@user_182cfe​ 

Wow! do I agree with you.  I will take advantage of this timely posting to expand on my findings (hope you don't mind). What bugs me is I have had an Arris XG1v4 box installed since 9/2019 and don't remember having pixelation problems on recordings until late last year.  In October 2021 I replaced the box with another Arris box but the pixelation didn't go away.  Early December 2021 I started talking to Comcast about the pixelation problem and how irritated I would get seeing pixelation on all my recordings.  Yes they gave me the standard troubleshooting procedures to try.  A technician was sent out at the end of December and replaced the drop, added a line filter and told me my wallplate feedthrus should have blue insulator.  They increased the gain on the line to 0dB.  I replaced the feedthrus and one RG-59/u cable with RG-6/u coax the next day. Also replaced a 1 x 4 splitter. All to no avail -  Pixelation, freezes, distortion. I gave up with bugging them. They said that in late September that they no longer use the hard drive in the Arris XG1v4 4K boxes to record content and stream all DVR recordings.  I read recently that Comcast asks customers to see if pixelation occur with their streaming app.  Tested that last night I watched a food network show simultaneously on my new OLED TV while watching the show via their app on my iPad.  The iPad stream showed no pixelation whereas the TV was pixelating.  This is proof positive that the Arris box is no good for steaming.  I like your decision to replace the box.  Did you replace the 4k box with a non-DVR box such as the XG2v2 (Non-DVR; Pace (PX022ANX) and Samsung Models) or RNG150 (non-DVR)?   At present I don't find I need 4K offered by Comcast via Peacock.  Thanks for sharing your experience, I am motivated to make the change.