This past Friday, I woke to no internet. After a dozen or so restarts, it was good again. This morning, I woke to very slow internet (Speedtest says 1Mbps). I have removed the splitter that came from the street into the house, so the only device connected it the cable modem, just to eliminate anything inside (we dont use the cable boxes anymore anyway). Just wondering if there is anything else I can do or if i need to get a tech out.
Grand Blanc, Michigan.
Thanks in advance for any insights/help,
Solved! Go to Solution.
Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.
Or copy all of the text of the status page and paste it into the body of your next post here.
Sorry, I see the images didnt post. From my Arris 8200, I am seeing this on the status page and am bothered by channel id 38 being 0Hz and not locked. What, if any, troubleshooting should I be doing? I have removed the 2-way splitter from the street that went to the modem and then off to the cable boxes. I have also disconnected/cleaned/reconnected the barrel connector on the side of the house going from the pedistal to the house.
|Channel ID||Lock Status||Modulation||Frequency||Power||SNR/MER||Corrected||Uncorrectables|
|5||Locked||QAM256||507000000 Hz||0.5 dBmV||34.1 dB||0||0|
|1||Locked||QAM256||477000000 Hz||0.2 dBmV||34.8 dB||0||0|
|2||Locked||QAM256||483000000 Hz||0.2 dBmV||35.0 dB||0||0|
|3||Locked||QAM256||489000000 Hz||0.2 dBmV||34.9 dB||0||0|
|4||Locked||QAM256||495000000 Hz||-0.6 dBmV||34.2 dB||0||0|
|6||Locked||QAM256||513000000 Hz||-0.1 dBmV||34.1 dB||5||0|
|7||Locked||QAM256||519000000 Hz||0.1 dBmV||34.1 dB||7||0|
|8||Locked||QAM256||525000000 Hz||0.2 dBmV||34.0 dB||0||0|
|9||Locked||QAM256||531000000 Hz||-0.6 dBmV||34.0 dB||0||0|
|10||Locked||QAM256||537000000 Hz||-0.6 dBmV||33.8 dB||10||0|
|11||Locked||QAM256||543000000 Hz||-0.5 dBmV||33.8 dB||4||0|
|12||Locked||QAM256||549000000 Hz||-0.9 dBmV||33.6 dB||20||0|
|13||Locked||QAM256||555000000 Hz||-1.1 dBmV||33.4 dB||85||0|
|14||Locked||QAM256||561000000 Hz||-1.3 dBmV||33.2 dB||104||0|
|15||Locked||QAM256||567000000 Hz||-1.8 dBmV||33.4 dB||259||0|
|16||Locked||QAM256||573000000 Hz||-1.6 dBmV||33.2 dB||400||0|
|17||Locked||QAM256||579000000 Hz||-1.8 dBmV||33.2 dB||1034||0|
|18||Locked||QAM256||585000000 Hz||-2.3 dBmV||33.0 dB||2382||0|
|19||Locked||QAM256||591000000 Hz||-2.4 dBmV||33.1 dB||5273||0|
|33||Locked||QAM256||453000000 Hz||1.3 dBmV||35.1 dB||0||0|
|34||Locked||QAM256||459000000 Hz||0.4 dBmV||34.8 dB||0||0|
|35||Locked||QAM256||465000000 Hz||0.5 dBmV||35.0 dB||0||0|
|36||Locked||QAM256||471000000 Hz||0.7 dBmV||35.1 dB||0||0|
|37||Locked||Other||690000000 Hz||-4.9 dBmV||24.0 dB||363278600||13225510|
|38||Not Locked||QAM256||0 Hz||0.0 dBmV||35.6 dB||0||0|
|39||Locked||QAM256||429000000 Hz||1.4 dBmV||35.1 dB||0||0|
|40||Locked||QAM256||435000000 Hz||1.6 dBmV||35.1 dB||0||0|
|41||Locked||QAM256||441000000 Hz||0.9 dBmV||35.2 dB||0||0|
|42||Locked||QAM256||447000000 Hz||1.1 dBmV||36.1 dB||0||0|
|43||Locked||QAM256||405000000 Hz||2.0 dBmV||35.8 dB||0||0|
|44||Locked||QAM256||411000000 Hz||1.9 dBmV||36.1 dB||0||0|
|45||Locked||QAM256||417000000 Hz||1.7 dBmV||35.5 dB||0||0|
The event log has this:
Date Time Event ID Event Level Description
|10/13/2020 09:34||74010100||6||"CM-STATUS message sent. Event Type Code: 16; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1 2 3.;CM-MAC=90:9d:7d:2e:99:15;CMTS-MAC=00:01:5c:a8:ce:65;CM-QOS=1.1;CM-VER=3.1;"|
|10/13/2020 09:34||67061600||6||"DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=90:9d:7d:2e:99:15;CMTS-MAC=00:01:5c:a8:ce:65;CM-QOS=1.1;CM-VER=3.1;"|
again, thanks for any insights,
Many of the downstream channel SNR's are too low / out of spec.
If none of the below tips apply, it would be best to get a tech out to investigate and correct this one;
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.
Good luck with it !
Thank you for the reply. I have done all of the troubleshooting you mention before I posted, so I will need to get a technician. Can you suggest the quickest way to get one out? I loathe the call to xfinity that will take +/- an hour to get to the point where they agree to send a tech out.
You could try their chat feature.