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Does Node overload cause downstream power level issues?
I used to have occasional disconnects before which I didnt bother because it used to correct "itelf". But offlate ever since the shelter at home, the disconnections have been too many to the extent that I couldnt wfh anymore, but the savng grace was that there was an xfinity wifi that some soul had left open on his router to which I could connect from my account. Called up Xfinity and they sent a tech since I had already done the first level troubleshooting (Rebooting router, having mimimum splitters etc) The tech came , had a look, decided not to come inside the house and said the node capacity is more than 100%. It was suposed to have 4800 connections where as there are 5000 connections currently. He said he cant do anything and left. A week has passed since then, disconnection was a daily affair but from today morning the modem has stayed more disconnected than connected. But neightbour's xfinity wifi was working so I decided to do some research and found out that the Downstream level of the modem is persisting at -19dbmv to 20dbmv for all the channels. My questions is, does node being at 100% capacity matter for the downstream power? Below are the modem readings
Signal to Noise Ratio | 30 dB | 30 dB | 30 dB | 30 dB | 30 dB | 30 dB | 30 dB | 30 dB | |
Downstream Modulation | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | QAM256 | |
Power Level
|
-19 dBmV | -19 dBmV | -19 dBmV | -20 dBmV | -20 dBmV | -20 dBmV | -20 dBmV | -20 dBmV |
I have an Arris modem SB6141 docsis 3.0 modem so the operating power seems to be outside the range
Andyr1
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8K Messages
5 years ago
Node capacity should have nothing to do with signal levels. Your signal levels are hideously low, as is your SNR (should be 33dB+) and the tech should have done more checking. How is your modem connected? There could be too many splitters in your home.
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CCAndrew
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5 years ago
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rohitakshay
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5 years ago
Thanks for the replies. I am guessing it is an xfinity issue. Nothing has changed since last week, It has always been the same, just that xfinity tech decided that since node was at 100% capacity, not to check anything else. This is what my upstream said just now before it got disconnected
Checked the downstream level now, and there is no improvement. The upstream level is as follows
[1] 32QAM
[3] 64QAM
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CCAndrew
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rohitakshay
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5 years ago
Thanks for all the help guys. After checking here with the forum in morning, I chatted with an xfinity support person again, who after doing the initial first level troubleshooting , sent a tech again. This time, I told the tech about the downstream power levels and the tech strraight away got to checking the cable from the junction box to the house. He initially thought it was the cabling (since the house owner had done it himself) but after a grueling 1.5 hr, he found the culprit with a splitter. We are in a multi unit apartment where we have 4 houses. The line split on the way to my house to neighbouring house who wasnt using comcast anymore. So he removed the splitter and added a connector instead. That seems to have solved the problem for now. Below are the downstream and upstream power levels. Thanks for all the help!!! @CCAndrew Thanks for the escalation, but I guess we are good for now 🙂
[1] 32QAM
[3] 64QAM
[1] 32QAM
[3] 64QAM
[1] 32QAM
[3] 64QAM
[1] 32QAM
[3] 64QAM
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CCAndrew
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5 years ago
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rohitakshay
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5 years ago
Thanks a lot!!! It helps to talk to you experts. I will keep this in mind. You folks are great here.
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CCAndrew
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5 years ago
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rohitakshay
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5 years ago
Just curious about your remark(and for the sake of my knowledge), I thought -8dbmv and SNR 36 was great, why do you say it is not the best?
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