sb8200 technical issues

Xfinity 400Mbps "blast" service but I'm only getting 30Mbps down (am getting 10Mbps up as advertised); I've seen several other posts but no firm resolution; modem sporadically shows the "blue" Docsis 3.1 light for download but mostly shows green. Will post status and error logs below.

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U

user_8b2e56

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7 Messages

4 years ago

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here is the modem event log

(edited)

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U

user_8b2e56

Visitor

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7 Messages

4 years ago

here is status summary - channel stats next

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U

user_8b2e56

Visitor

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7 Messages

4 years ago

channel stats - page 1 - I believe these all look good (as does the other page)

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U

user_8b2e56

Visitor

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7 Messages

4 years ago

channel stats - page 2 - I believe these all look good (as does the other page)

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Andyr1

Gold Problem Solver

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8K Messages

Your OFDM SNR is too low, which is why that won't reliably connect. You may have some noise issues with the higher frequencies, or possibly a trap or other problem causing a sharp signal dropoff at the highest frequencies.That 702MHz is where the OFDM starts, but it probably runs up to 850MHz or so as it's treated as one extra wide channel.

Signal levels are OK, although the upstream is lower than normal.

4 years ago

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U

user_8b2e56

Visitor

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7 Messages

thanks for the insights - what can I do about that OFDM SNR issue?

4 years ago

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EG

Expert

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111.5K Messages

4 years ago

@user_8b2e56

FWIW. There is a known glitch with some makes / models of modem's firmware where the measuring mechanism incorrectly reads the power level, the SNR, and the bit errors for that channel. So it reads many errors when there really aren't.

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Your Home Network

user_8b2e56

sb8200 technical issues

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Andyr1

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