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Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Tutor

Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

I have been experiencing the intermittent freezing / drops of my U-Verse service.  I have read through a number of threads on this forum and have come to the conclusion that I should be contacting the tier 2 tech support guru... David. U-verse has been installed at my home for just over 4 months now.  Within the past week I have had three techs come to diagnose/correct the problem. First tech found some noise on the coax line. I assisted him in rerouting the coax and cat5e runs to avoid any major power wires. This reduced the noise on the line, but not my loss if signal issues. Second tech replaced the RG and found an issue with the lines at the hub up my street. The third line tech replaced or repaired that line up the street. Not exactly sure which one as I was not home to speak with him while the work was being performed.  Nevertheless, THE PROBLEMS PERSIST!!! I am frustrated and am willing to hear any suggestions for solving this issue. I would much prefer to stay with AT&T than go back to Charter (FML).

 

My house is wired for cat5e and coax. This wiring is less than 3 years old. NID to RG is run cat5e

cat5e devices: 2 desktops, xbox360 

coax devices: 2 STBs (1dvr)

wireless: 2 iPhones, 3 laptops

 

I have downloaded U-Verse Realtime and taken the screenshots:

IP/Profile

Bitloading

Coax/HPNA

Error Table

 

-Chris

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Message 1 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

From your error table, it seems clear that the problem is very intermittent.  In the last 15 minutes, you have no retrains or uncorrected blocks, so right now the line is running well.

 

But in the last 24 hours, there's many things wrong, including uncorrected blocks, retrains, etc.  So we can infer that there is some intermittent interference issue that is causing your line to degrade periodically to the point where the signal is interrupted.

 

I would begin looking for sources for the interference that are involved with some device that cycles on/off.  Some possibilities:

 

  • Air Conditioner or heater
  • Gas-discharge lighting, like mercury vapor security lights
  • Street light
  • Refrigerator/freezer
  • RF-interference, such as a neighbor who is a HAM radio operator
  • Treadmill or exercise bike
  • Any other device that may have a bad power supply in it

 

If you find one of these devices as the cause, it probably has a bad power supply in it that needs to be changed out.

 

 

Then, I'd make sure you have EFI/RFI isolating surge suppressors on all the U-Verse devices:

 

  • RG
  • STBs/DVR

The ideal EFI/RFI isolating surge suppressors are the Tripp-Lite Isobar power blocks.

 

 

Message 2 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

With all of the uncorrected errors the OP is getting could it be a problem with their install?  I have/am experiencing what happens when a device is turned on at my home.  Our treadmill severely interrupts our service, but I get on it at 7am, and my daughter uses it at about 9am when no one is watching tv or recording programs.  If it gets to be a big enough issue then I will buy a filter.

Message 3 of 21
Contributor

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Same problem here.  Rerouted cat5 line, rerouted coax line, switched from wireless to hard wire on computer and was OK for a while but started again a few days ago.  They're coming out for the 900th time tomorrow.  Hope this is the last time.

Message 4 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

There are a few of us that believe we are all experiencing the freezing and pixelization because ATT is preparing to do a big rollout.  In the past subs in every region have experienced these two issues that were followed by a big rollout.  Hopefully we are right.

Message 5 of 21
Tutor

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Thanks for the suggestions guys!

 

...Update...

 

I have wired a new circuit in the house for for the RG. It is now alone on its own circuit. It should be noted that the previous power source was not grounded!... 1960s wiring FTL. The new circuit is grounded and I also installed a NON-isolated surge protection outlet (not a stand alone surge protector). I may add a stand alone in the future pending the results of this upgrade.

 

SomeJoe7777, I don't think that I have any issues with interference from the HVAC or similar equipment. It is on and off all day long and has never coincided with a signal loss. However, the mention of the HAM radio interference caught my eye. Believe it or not, I DO have a neighbor that operates an amateur radio! The tower is located approximately 700-1000 feet from my residence.  I'm no expert in that area so I have no idea what kind of interference that may cause to my service.

 

I've reset my RG statistics and I will post some new screen shots after a day or so of logging. I did already notice a 1db boost in noise margin and the max downstream rate jumped about 1,000 Kbps. I'm not getting my hopes up just yet, but it definitely has had some affect.

Message 6 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Cool.

Message 7 of 21
ACE - Master

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Had an oddball freeze on Sunday - while watching the Colts/JAX game.  Key Third Down conversion of course.  I went in and looked at the RG it was blinking red then quickly back to normal.  3 minutes later, TV was back to normal.

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 8 of 21
Highlighted
Tutor

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Well after ~1 day of logging, here are the results:

 

Obviously an improvement and no Loss of Signals or Retrains...yet

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Message 9 of 21
ACE - Master

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

I'm no exprt at reading the bitload image but around both 5 and 6 MHz looks odd.  SJ7777?

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 10 of 21
Tutor

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Message 11 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Could be a bridge tap somewhere in the line between your home and the VRAD.  IMO  That would mean you need an I&R tech to come and check the lines.

Message 12 of 21
Expert

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Those stats look better, there have been no retrains and only a handful of uncorrected blocks.

 

The oddities in the bitloading graph I believe are caused because the line profile is only 25/2.  If the profile were the recommended 32/5, the loading would be more even across the spectrum.

 

I don't think there's any bridge tap here, the max rate is above average for his distance, and a bridge tap normally would cause a lot of attenuation, reducing the max rate.

 

Message 13 of 21
Tutor

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

Well, I thought I had nixed this problem until i woke up this morning and checked my RG stats... 8 retrains, 31 loss of signal, and numerous uncorrectable blocks in the last 24 hours. Smiley Sad  I'm not sure what to do next. HELP!!!

 

Message 14 of 21
Master

Re: Intermittent TV Freezing / Internet Drops / Loss of Signal Failures / Retrains

call tech suppport  or  wait for a heal thy-self miracle..

 

 

imho

Message 15 of 21
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