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Is my SB6183 ok?

New Poster

Is my SB6183 ok?

Details:

Modem: OWNED - Arris SB6138

60Mbps plan that I upgraded to 150Mbps this morning.

Removed wifi router and connected my computer directly to the modem with cat 6 cable.

Rebooted everything under the sun.

 

Before I upgraded my speed tier I was getting around 30Mbps and I still am.

 

Xfinity tech though my modem was bad. Before I go get a new modem or have a Xfinity tech come out, I'd like you knowledgable folks to take a peak at my modem stats out.

 

Thanks in advanced for your help!

 

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked QAM256 1 465000000 Hz -3.4 dBmV 28.5 dB 54584 2791
2 Locked QAM256 2 471000000 Hz -1.0 dBmV 30.4 dB 1934 2459
3 Locked QAM256 3 477000000 Hz 0.1 dBmV 33.1 dB 1856 2983
4 Locked QAM256 4 483000000 Hz -0.3 dBmV 35.3 dB 1942 977
5 Locked QAM256 5 489000000 Hz -2.4 dBmV 34.8 dB 1870 1355
6 Locked QAM256 6 495000000 Hz -2.0 dBmV 36.7 dB 1546 1731
7 Locked QAM256 7 507000000 Hz 0.6 dBmV 37.1 dB 1586 2488
8 Locked QAM256 8 513000000 Hz 1.1 dBmV 38.9 dB 1392 1507
9 Locked QAM256 9 519000000 Hz 0.0 dBmV 29.2 dB 963400 45393
10 Locked QAM256 10 525000000 Hz -0.6 dBmV 0.0 dB 0 0
11 Locked QAM256 11 531000000 Hz -0.4 dBmV 30.9 dB 14710414 868937
12 Locked QAM256 12 537000000 Hz 0.2 dBmV 34.2 dB 1614 1660
13 Locked QAM256 13 543000000 Hz 1.3 dBmV 36.0 dB 1470 1768
14 Locked QAM256 14 549000000 Hz 1.3 dBmV 38.0 dB 1483 1260
15 Locked QAM256 15 555000000 Hz 0.3 dBmV 38.1 dB 1952 575
16 Locked QAM256 16 561000000 Hz -0.6 dBmV 0.0 dB 0 0

 

 

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 50.5 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31400000 Hz 54.0 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 25000000 Hz 54.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 18600000 Hz 54.0 dBmV



Current Event Log after last modem reboot:

 

Time Priority Description
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Sat Jun 08 13:46:35 2019 Warning (5) MDD message timeout;CM-MAC=6c:ca:08:72:73:d7;CMTS-MAC=58:97:bd:2e:aa:ad;CM-QOS=1.1;CM-VER=3.0;
 
Expert

Re: Is my SB6183 ok?

The upstream power is high and it may be intermittently fluctuating even higher to out of spec levels. Also, the SNR is out of spec on some of the downstream channels. That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.

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: Is my SB6183 ok?

No splitters that I'm aware of. Coax from modem to the apartment coax outlet.

Expert

Re: Is my SB6183 ok?

O/k well if nothing applies then book a tech visit to investigate as I stated in my last sentence. Good luck ! And please post back with how things turn out.



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New Poster

Re: Is my SB6183 ok?

Also wanted to mention I factory reset the cable modem; no joy

 

Last week's connection was fine: 48-62 Mbps

Highlighted
Expert

Re: Is my SB6183 ok?

It's a line impairment issue somewhere / connection quality problem.



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New Poster

Re: Is my SB6183 ok?

Roger that. I’ll ask for a tech to come out
New Poster

Re: Is my SB6183 ok?

On a hunch, I replaced the coax cable from my modem to the wall with a brand new cable and that completly resolved my issue!

Expert

Re: Is my SB6183 ok?

How about that !! Glad you got it figured out !!

 

Curious to see what the signal figures look like now ?



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New Poster

Re: Is my SB6183 ok?

They are beautiful.

 

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked QAM256 13 543000000 Hz 3.7 dBmV 39.0 dB 0 0
2 Locked QAM256 1 465000000 Hz 2.5 dBmV 39.4 dB 0 0
3 Locked QAM256 2 471000000 Hz 3.0 dBmV 39.5 dB 0 0
4 Locked QAM256 3 477000000 Hz 2.8 dBmV 39.4 dB 0 0
5 Locked QAM256 4 483000000 Hz 3.1 dBmV 39.4 dB 0 0
6 Locked QAM256 5 489000000 Hz 3.1 dBmV 39.4 dB 0 0
7 Locked QAM256 6 495000000 Hz 3.1 dBmV 39.3 dB 0 0
8 Locked QAM256 7 507000000 Hz 2.9 dBmV 38.3 dB 0 0
9 Locked QAM256 8 513000000 Hz 3.3 dBmV 39.3 dB 0 0
10 Locked QAM256 9 519000000 Hz 3.1 dBmV 39.2 dB 0 0
11 Locked QAM256 10 525000000 Hz 3.2 dBmV 39.1 dB 0 0
12 Locked QAM256 11 531000000 Hz 3.6 dBmV 39.2 dB 0 0
13 Locked QAM256 12 537000000 Hz 3.4 dBmV 39.1 dB 0 0
14 Locked QAM256 14 549000000 Hz 3.8 dBmV 39.1 dB 0 0
15 Locked QAM256 15 555000000 Hz 3.8 dBmV 39.0 dB 0 0
16 Locked QAM256 16 561000000 Hz 3.9 dBmV 39.0 dB 0 0

 

Expert

Re: Is my SB6183 ok?

Downstream looks good ! What about the upstream ?


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New Poster

Re: Is my SB6183 ok?

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 1 5120 Ksym/sec 37800000 Hz 41.5 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 31400000 Hz 41.5 dBmV
3 Locked ATDMA 3 5120 Ksym/sec 25000000 Hz 43.0 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 18600000 Hz 43.0 dBmV



Expert

Re: Is my SB6183 ok?

Looking good ! You should be good to go !! Take care and thanks for using these help forums ! 😎


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