Dynamic Range Window Violation
Hello, I am having issues getting someone to help fix a problem with my internet connection. I receive a Dynamic Range Window Violation in my modem log every few minutes and this greatly affects my internet staying connected and VERY SLOW speeds. I have Cox Gigablast 940MB and speeds are near 50 to 60MB constantly and dropped connection. Modem is brand new and worked find until we switched from 300MB plan to 940MB plan. Here is my error log details from modem event log. This problem has been reported many times and it appears that a "data tech" can be sent to the home to investigate the issue and fix the problem. Please help! Event Log The table below contains the log of events that the SB8200 has detected. This log can be important to the service provider to help diagnose and correct problems, if any should occur. Date Time Event ID Event Level Description 01/27/2020 21:04 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: 1 2; New Profile: 1 2 3.;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 2436694061 5 "Dynamic Range Window violation" 01/27/2020 20:52 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 2436694061 5 "Dynamic Range Window violation" 01/27/2020 20:52 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 2436694061 5 "Dynamic Range Window violation" 01/27/2020 20:52 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 2436694061 5 "Dynamic Range Window violation" 01/27/2020 20:52 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 2436694061 5 "Dynamic Range Window violation" 01/27/2020 20:52 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:52 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2.;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:51 73040100 6 "TLV-11 - unrecognized OID;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:51 68000300 5 "DHCP WARNING - Non-critical field invalid in response ;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/01/1970 00:01 2436694066 6 "Honoring MDD; IP provisioning mode = IPv4" 01/01/1970 00:00 82000200 3 "No Ranging Response received - T3 time-out;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:7e:95:40:25:ce;CM-QOS=1.1;CM-VER=3.1;" 01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" 01/27/2020 20:50 2436694044 3 "Resetting the cable modem due to docsDevResetNow" 01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;" 01/01/1970 00:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=18:9c:27:f9:b9:bd;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
Intermittent Critical Modem Events
Recently I have been encountering upstream issues which appear to be tied to critical priority (tier 3) events in my modem's event log. I can still hear people talking to me over VoIP, but I cannot talk, and I cannot open new connections, such as opening a browser and accessing a web page. My equipment: Netgear CM1200 The main errors I encounter: SYNC Timing Synchronization failure - Loss of Sync Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 time out No Ranging Response received - T3 time-out I'm also getting some non-critical errors I think may be of significance: REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW Dynamic Range Window violation These issues don't just occur during the day with increased use due to covid (alongside the increased ping and packet loss) - they will also happen randomly at say4AM, when almost nobody is using the internet. These events are a complete loss of internet access, where during the day I can still access the internet. Many times the upstream light on my modem will start to blink (not always). Sometimes, when I look at my ping to google which I constantly log for diagnostics, I'll see that the packet loss is on and off about every other second. During these situations, my internet is functioning barely. Some web pages will load slowly as it gets trickled in through the constant packet loss and loss of internet. No one else is using the internet in my house during these times, so I can safely say it's not an in-home use scenario. How do I get someone to come out who has some actual technical knowledge that can troubleshoot this for me? I had a technician out today and it seems like he doesn't really know too much other than how to plug their device into the tap/coax in my house and tell me 'it looks good right now'. Not 30 minutes later and it's happening again to me. I have a feeling it's something to do with their lines up to my house, or perhaps the local node. But I don't want to jump to conclusions.