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Arris SB8200 - acceptable correctable/uncorrectable errors

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Arris SB8200 - acceptable correctable/uncorrectable errors

What are the acceptable rate of corrected and uncorrected errors on this modem? I recently upgraded my tier and added this modem. I am getting the following which I assume are pretty high. I have no connection problems however, and speedtest reports correct speeds for my tier.

 

Downstream Bonded Channels
Channel IDLock StatusModulationFrequencyPowerSNR/MERCorrectedUncorrectables
13LockedQAM256507000000 Hz-2.4 dBmV40.4 dB456128
1LockedQAM256429000000 Hz-2.6 dBmV40.1 dB1712758
2LockedQAM256435000000 Hz-3.1 dBmV40.3 dB25462130
3LockedQAM256441000000 Hz-3.6 dBmV40.1 dB25571800
4LockedQAM256447000000 Hz-3.2 dBmV39.7 dB1235920
5LockedQAM256453000000 Hz-3.1 dBmV39.3 dB1106998
6LockedQAM256459000000 Hz-2.7 dBmV39.5 dB835835
7LockedQAM256465000000 Hz-2.4 dBmV40.4 dB706690
8LockedQAM256471000000 Hz-2.8 dBmV40.3 dB956769
9Not LockedUnknown477000000 Hz-2.9 dBmV0.0 dB6232935911663346
10LockedQAM256483000000 Hz-3.1 dBmV31.1 dB163300556839850316
11LockedQAM256489000000 Hz-3.2 dBmV36.0 dB5282529869
12LockedQAM256495000000 Hz-3.1 dBmV38.5 dB17404511114
14Not LockedUnknown513000000 Hz-2.3 dBmV0.0 dB1988442646403906668
15Not LockedUnknown519000000 Hz-2.4 dBmV0.0 dB1084694572394751067
16Not LockedUnknown525000000 Hz-2.4 dBmV0.0 dB2305972502757635029
17LockedQAM256531000000 Hz-2.5 dBmV32.4 dB40342680982113511
18LockedQAM256537000000 Hz-1.9 dBmV25.8 dB501695393190272875
19Not LockedUnknown543000000 Hz-2.2 dBmV0.0 dB1258026264190823162
20LockedQAM256549000000 Hz-2.0 dBmV33.4 dB56136104904
21LockedQAM256555000000 Hz-2.0 dBmV38.6 dB412675
22LockedQAM256561000000 Hz-2.2 dBmV40.0 dB333644
23LockedQAM256567000000 Hz-2.3 dBmV31.4 dB28360999177892020
24LockedQAM256573000000 Hz-2.4 dBmV28.3 dB15031421710112433
25LockedQAM256579000000 Hz-2.5 dBmV33.3 dB2825524867
26LockedQAM256585000000 Hz-2.1 dBmV40.3 dB328628
27LockedQAM256591000000 Hz-1.7 dBmV40.6 dB332614
41LockedOther690000000 Hz-3.5 dBmV21.8 dB356948545525
42Not LockedQAM2560 Hz0.0 dBmV40.2 dB43301790
43LockedQAM256405000000 Hz-4.6 dBmV40.4 dB29361197
44LockedQAM256411000000 Hz-4.0 dBmV40.3 dB23441376
45LockedQAM256417000000 Hz-3.5 dBmV40.5 dB1851986
Upstream Bonded Channels
ChannelChannel IDLock StatusUS Channel TypeFrequencyWidthPower
14LockedSC-QAM Upstream16400000 Hz6400000 Hz50.0 dBmV
23LockedSC-QAM Upstream22800000 Hz6400000 Hz50.0 dBmV
31LockedSC-QAM Upstream35600000 Hz6400000 Hz49.0 dBmV
42LockedSC-QAM Upstream29200000 Hz6400000 Hz50.0 dBmV
55LockedSC-QAM Upstream39600000 Hz1600000 Hz49.0 dBmV

Current System Time: Sat Aug 8 14:33:17 2020

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Expert

Re: Arris SB8200 - acceptable correctable/uncorrectable errors

You have signal problems with some of the downstream channels ! The SNR's are too low and there are too many uncorrected bit errors. The upstream power is also high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

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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New Poster

Re: Arris SB8200 - acceptable correctable/uncorrectable errors

Thanks for the insight. I just did a complete audit of the coax wiring in the house (I just recently moved in), and it is a big mess! I found 4 random splitters  at various nooks and crannies with some cables leading to  stripped open ends laying all over the attic! You may have saved me a lot of misery. It is amazing how I could still get service. I will deal with this mess and hopefully this will solve the issue. 

 

Thanks again!

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Expert

Re: Arris SB8200 - acceptable correctable/uncorrectable errors

Good luck with it ! Please post back with how things turn out.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!