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Can someone check my modem channel status and codewords

smugyou
Frequent Visitor

Can someone check my modem channel status and codewords

I have a XB6 and 1000/35 plan. Here is the imgur link of the modem Xfinity status page 
I have been getting 600/20 on this plan in bridge mode specifically but wanted to check if its a signaling issue. Not sure what the limits are. 
https://i.imgur.com/DzJrlDK.png 

Screen Shot 2020-04-05 at 11.08.18 AM.png

EG
Expert

Re: Can someone check my modem channel status and codewords

Both the upstream and the downstream power are almost out of spec, and they may be intermittently fluctuating even farther to out of spec levels. 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.



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smugyou
Frequent Visitor

Re: Can someone check my modem channel status and codewords

What values should I be looking for?

EG
Expert

Re: Can someone check my modem channel status and codewords

From the sticky "Troubleshooting Tips" topic right at the top of this board;

 

Specification      Min             Max
Downstream Power Level    
Cable Modems -10dBmV +10dBmV
Gateways and EMTAs -7dBmV +7dBmV
Downstream Signal to Noise Ratio 35dB -
Upstream Power Level +35dBmV +50dBmV
Upstream Signal to Noise Ratio 31dB -
Upstream Receive Power -2dBmV +2dBmV


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smugyou
Frequent Visitor

Re: Can someone check my modem channel status and codewords

I removed one segment of COAX and numbers are within range, but the connection is no different with getting above 600mbit

EG
Expert

Re: Can someone check my modem channel status and codewords

I didn't say that that was the direct cause of your speed issue but it was a problem that needed to be addressed regardless.

 

If you take the gateway out of bridge mode does your speed increase ?



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smugyou
Frequent Visitor

Re: Can someone check my modem channel status and codewords

Yeah if i do a factory reset, but I experience the problem where it always ends up at 600 with bridge :'(

smugyou
Frequent Visitor

Re: Can someone check my modem channel status and codewords

INDEX 1 and 32 for codewords always shows as correctable, is this expected?

EG
Expert

Re: Can someone check my modem channel status and codewords


@smugyou wrote:

Yeah if i do a factory reset, but I experience the problem where it always ends up at 600 with bridge :'(


FWIW, we've been seeing many posts here lately about the bridge mode slower speed problem, but no solution yet. It's probably a bug.



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