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External Line Signal Power inconsistent when more channels requested (3.1 vs. 3.0 )

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New Poster

External Line Signal Power inconsistent when more channels requested (3.1 vs. 3.0 )

My SB8200 is connected directly to the external line (from telephone post ) but the signal levels are out of spec and my speed is .8MB donwload . This just started in the last two days. Seems like a line problem to me. How can I get  my line signal quality improved ?

<b>imgur.com/gallery/7k0oEWO</b>
imgur.com/gallery/7k0oEWO

 

 

https://imgur.com/gallery/7k0oSB8200 SignalsSB8200 SignalsEWO

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Expert

Re: External Line Signal Power inconsistent when more channels requested (3.1 vs. 3.0 )

Can't see your pic. Since you are a new poster, it needs to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting it at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to it here.

Or copy all of the text of the status page and paste it into the body of your next post here.



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New Poster

Re: External Line Signal Power inconsistent when more channels requested (3.1 vs. 3.0 )

imgur.com/gallery/7k0oEWO
Highlighted
Expert

Re: External Line Signal Power inconsistent when more channels requested (3.1 vs. 3.0 )

You have a significant *cable tilt* problem. The downstream power is out of spec on the higher channels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!