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2 of 16 channels are unknown, and have 0db SNR

                 So for a few months now I've noticed my speed has been hovering around 150 (i have the 200 package). I figured it was just traffic from a lot of people using the Internet, but i came across something that was different than before in the modem site (192.168.100.1). 2 of the 16 channels were set as unknown. Since they announced there new speeds I bought a SB6183 and had a steady 230 mbps up until a few months ago. I called tech support with the issue and he had pointed out that the issue could be from me putting in gold plated splitters, and that the one they give are galvanized and ground better. I swapped all of them, no measurable difference at all. A technician came out to check whats going on and basically said the problem was with a node that my block/complex is connected to and that they are upgrading it and their is no set date on when it will be completed. He said it could be around 3 weeks to 1.5 months max, gave me the node number and said to call support in the coming weeks and ask them when my node will be upgraded, then left. Any thoughts on if the problem is actually from the node or I may have a problem with the actual modem? 

Link to screen capture of the modem page
http://imgur.com/SYekULR


 

 

22 REPLIES 22
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Expert

Re: 2 of 16 channels are unknown, and have 0db SNR

looks li8ke tv ch 36-37 ingress.. What's your zip?

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Re: 2 of 16 channels are unknown, and have 0db SNR

91042

Expert

Re: 2 of 16 channels are unknown, and have 0db SNR

Your area has virtually all tv channels in use....It's odd that only 2 are impacted, post the page again, copy and paste it so I can compare it with the previous one.

 

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Re: 2 of 16 channels are unknown, and have 0db SNR

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1LockedQAM25617615000000 Hz-2.8 dBmV41.3 dB220
2Lockedunknown15603000000 Hz-0.2 dBmV0.0 dB00
3Lockedunknown16609000000 Hz0.6 dBmV0.0 dB00
4LockedQAM25618621000000 Hz-2.8 dBmV41.3 dB480
5LockedQAM25619627000000 Hz-2.8 dBmV41.2 dB220
6LockedQAM25620633000000 Hz-2.9 dBmV41.2 dB260
7LockedQAM25621639000000 Hz-2.9 dBmV41.1 dB380
8LockedQAM25622645000000 Hz-2.9 dBmV41.2 dB250
9LockedQAM25623651000000 Hz-3.2 dBmV40.8 dB330
10LockedQAM25624657000000 Hz-3.2 dBmV40.9 dB250
11LockedQAM25625663000000 Hz-3.3 dBmV40.7 dB280
12LockedQAM25626669000000 Hz-3.6 dBmV40.5 dB370
13LockedQAM25628681000000 Hz-3.7 dBmV40.3 dB380
14LockedQAM25629687000000 Hz-3.9 dBmV40.2 dB380
15LockedQAM25630693000000 Hz-3.7 dBmV40.3 dB460
16LockedQAM25632705000000 Hz-4.5 dBmV40.1 dB180

 

 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA275120 Ksym/sec30600000 Hz43.5 dBmV
2LockedTDMA252560 Ksym/sec18500000 Hz41.8 dBmV
3LockedATDMA265120 Ksym/sec23300000 Hz42.3 dBmV
4LockedTDMA282560 Ksym/sec37000000 Hz43.5 dBmV
Expert

Re: 2 of 16 channels are unknown, and have 0db SNR

Yes, that's showing ingress, there is a bad connector or loose connection somewhere. Make sure all are compression, not hex crimp or molded and all are more than finger tight.

It might be outside

 

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Re: 2 of 16 channels are unknown, and have 0db SNR

The technician went outside and specifically checked the connection from the outside and said everything was fine, I also ran the modem directly on the main cable coming into the house, still the same problem.

Browser

Re: 2 of 16 channels are unknown, and have 0db SNR

so what could it be, what should i  be checking?

Expert

Re: 2 of 16 channels are unknown, and have 0db SNR

Copy and paste the modems signal level and error lohgg page again, let's see what has changed.

 

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Re: 2 of 16 channels are unknown, and have 0db SNR

I talked to tier 3 support and they are sending another technician out to check the main from the house to the tap outside becuse the first technician didnt check that for some odd reason.