Contributor
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217 Messages
Downstream power gone up a lot
My power numbers are usually perfect, I happened to look at the CM2000 modem page, and it's not happy with the downstream. See pictures below, some power levels are very high. Anything I should do other than schedule an appointment?


Accepted Solution
BruceW
Gold Problem Solver
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26.3K Messages
2 years ago
The power levels are a bit odd, showing a "negative tilt" (the higher frequencies are reading higher than the lower frequencies). The last dozen or so are out of spec (too high), see Internet Troubleshooting Tips.
I'd be guided by performance: if the service is working well I'd ignore the modem's complaints and the signal levels. But if there are problems I'd be calling on Comcast to send out a premise tech. If you decide to do that call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit ($70-$100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.
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BruceW
Gold Problem Solver
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26.3K Messages
2 years ago
The posted stats are not readable. Could you post a readable set? And include the OFDM and upstream stats and the event log?
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user_daw312
Contributor
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217 Messages
2 years ago
Ah, try thuis. Modem shows green now so the problem appears to have gone away. Yet some power looks high still, what do you think? The log is clean - nothing in it.
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user_daw312
Contributor
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217 Messages
2 years ago
Ah it's back to yellow/'poor connection' - it must be right on the edge. The power numbers are high. Here is a comparison with Dec 8, which I happened to have a snapshot of:
I don't see a way to call, I have to use the 'Xfinity Assistant'?
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user_daw312
Contributor
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217 Messages
2 years ago
OK, thanks @BruceW ! FYI @BruceW , I have always had negative tilt in the power numbers. Maybe there is a reason for it?
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