Netgear Cax-80 - Dynamic Range Window Violation
Hi,
My internet has been a bit spastic the last few days. I have several Nest speakers that will randomly not being connected to internet, wifi speeds will be shockingly low, streamed video might buffer, etc. Anyway, looking at the event logs, there are these warnings that the dynamic range window has a violation. I contacted chat support and the individual I was connected to simply told me he ran a diagnostic and it said my $500 wireless modem was bad and I should just lease the Cox unit. I called in then and the gentleman said he was going to push an update to the modem. I'm not sure what this is supposed to do but anyway he did it. I have a hard time believing the Netgear device is suddenly bad, so I am reaching out here for some insight.
This is the cable diag PRE-Modem update
Cable Diagnostic
Status: Poor
Action:
[Partial Service]
If the Partial Service mode does not go away within a few hours (Click the Refresh button after each step):
1) Make sure the coaxial cable is tightly connected.
2) Remove any unnecessary splitters.
3) Replace any required ones.
4) Contact your service provider for troubleshooting help.
Internet Access: Good
Downstream Status: Poor
Partial Service: Poor
Cable modem is in partial service mode. Your service provider might be under maintenance. Most of the time it won't affect your traffic and will automatically clear when work is complete.
Downstream Power Level: Good
Downstream SNR: Good
Upstream Status: Good
Upstream Power Level: Good
Current time: Tue Feb 06 11:11:41 2024
Startup Procedure
Acquire Downstream Channel: 237 MHz Locked
Connectivity State: OK Operational
Boot State: OK Operational
Security: Enabled BPI+
Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 45 237000000 Hz 1.6 dBmV 44.2 dB 0 0
2 Locked 256 QAM 1 735000000 Hz 2.6 dBmV 43.9 dB 0 0
3 Locked 256 QAM 2 741000000 Hz 3 dBmV 44.1 dB 0 0
4 Locked 256 QAM 3 747000000 Hz 2.7 dBmV 43.9 dB 0 0
5 Locked 256 QAM 4 753000000 Hz 2.8 dBmV 44 dB 0 0
6 Locked 256 QAM 5 759000000 Hz 2.3 dBmV 43.7 dB 0 0
7 Locked 256 QAM 6 765000000 Hz 2.2 dBmV 43.7 dB 0 0
8 Locked 256 QAM 7 771000000 Hz 2.1 dBmV 43.6 dB 0 0
9 Locked 256 QAM 8 777000000 Hz 2 dBmV 43.6 dB 0 0
10 Locked 256 QAM 25 117000000 Hz -0.7 dBmV 42.3 dB 0 0
11 Locked 256 QAM 26 123000000 Hz -0.3 dBmV 42.7 dB 0 0
12 Locked 256 QAM 27 129000000 Hz -0.1 dBmV 43 dB 0 0
13 Locked 256 QAM 28 135000000 Hz -0.3 dBmV 42.7 dB 0 0
14 Locked 256 QAM 29 141000000 Hz -0.4 dBmV 42.7 dB 0 0
15 Locked 256 QAM 30 147000000 Hz -0.3 dBmV 42.9 dB 0 0
16 Locked 256 QAM 31 153000000 Hz -0.1 dBmV 43.3 dB 0 0
17 Locked 256 QAM 32 159000000 Hz 0.2 dBmV 43.5 dB 0 0
18 Locked 256 QAM 33 165000000 Hz 0.4 dBmV 43.6 dB 0 0
19 Locked 256 QAM 34 171000000 Hz 0.5 dBmV 43.7 dB 0 0
20 Locked 256 QAM 35 177000000 Hz 0.8 dBmV 43.7 dB 0 0
21 Locked 256 QAM 36 183000000 Hz 1 dBmV 43.9 dB 0 0
22 Locked 256 QAM 37 189000000 Hz 1.2 dBmV 44 dB 0 0
23 Locked 256 QAM 38 195000000 Hz 1.5 dBmV 44.1 dB 0 0
24 Locked 256 QAM 39 201000000 Hz 1.6 dBmV 44.2 dB 0 0
25 Locked 256 QAM 40 207000000 Hz 1.6 dBmV 44.2 dB 0 0
26 Locked 256 QAM 41 213000000 Hz 1.6 dBmV 44.2 dB 0 0
27 Locked 256 QAM 42 219000000 Hz 1.3 dBmV 44.1 dB 0 0
28 Locked 256 QAM 43 225000000 Hz 1.3 dBmV 44.1 dB 0 0
29 Locked 256 QAM 44 231000000 Hz 1.3 dBmV 44.2 dB 0 0
30 Locked 256 QAM 46 243000000 Hz 1.7 dBmV 44.3 dB 0 0
31 Locked 256 QAM 47 249000000 Hz 1.7 dBmV 44.3 dB 0 0
32 Locked 256 QAM 48 255000000 Hz 1.7 dBmV 44.2 dB 0 0
Upstream Bonded Channels
Channel LockedStatus ChannelType ChannelID SymbolRate Frequency Power
1 Locked ATDMA 4 5120 Ksym/sec 36300000 Hz 38.5 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 16900000 Hz 38.8 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23500000 Hz 38.8 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 29900000 Hz 38.8 dBmV
5 Not Locked Unknown 0 0 0 0.0
6 Not Locked Unknown 0 0 0 0.0
7 Not Locked Unknown 0 0 0 0.0
8 Not Locked Unknown 0 0 0 0.0
Downstream OFDM Channels
Channel LockedStatus ProfileID ChannelID Frequency Power SNR/MER ActiveSubcarrier Unerror Correctable Uncorrectable
1 Locked 0 ,1 ,2 ,3 159 300000000 Hz 1.38 dBmV 43.6 dB 296 ~ 7895 82611905 2366098 0
2 Locked 0 ,1 ,2 ,3 160 918000000 Hz 1.38 dBmV 41.9 dB 1108 ~ 2987 22598918 4452354 0
Upstream OFDMA Channels
Channel LockedStatus ProfileID ChannelID Frequency Power
1 Locked 3 ,4 ,9 ,10 ,11 ,12 ,13 6 36800000 Hz 39.8 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV
Event Log
Time Priority Description
Tue Feb 6 11:06:32 2024 Notice CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0.;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:57 2024 Notice US profile assignment change. US Chan ID: 8; Previous Profile: 13; New Profile: 9 13.;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:26 2024 Warning Dynamic Range Window violation
Tue Feb 6 11:04:26 2024 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:26 2024 Warning Dynamic Range Window violation
Tue Feb 6 11:04:26 2024 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:26 2024 Warning Dynamic Range Window violation
Tue Feb 6 11:04:26 2024 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:20 2024 Notice DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:04:18 2024 Notice DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:03:53 2024 Notice TLV-11 - unrecognized OID;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Tue Feb 6 11:03:52 2024 Warning DHCP WARNING - Non-critical field invalid in response ;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:56 1970 Notice Honoring MDD; IP provisioning mode = IPv4
Thu Jan 1 00:00:44 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Feb 5 18:18:53 2024 Critical Resetting the cable modem due to docsDevResetNow
Thu Jan 1 00:00:44 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Fri Jan 26 11:48:12 2024 Critical Resetting the cable modem due to docsDevResetNow
Thu Jan 25 08:33:40 2024 Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Wed Jan 17 17:46:56 2024 Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=-removed-CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:43 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Tue Jan 16 09:06:36 2024 Critical Resetting the cable modem due to docsDevResetNow
Sun Dec 31 13:40:32 2023 Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:43 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:58 1970 Critical DHCP FAILED - Request sent, No response;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:43 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Nov 30 08:47:09 2023 Critical Resetting the cable modem due to docsDevResetNow
Thu Jan 1 00:00:44 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 6 08:33:55 2023 Critical Resetting the cable modem due to docsDevResetNow
Thu Nov 2 15:26:48 2023 Critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:00:44 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Oct 26 01:02:42 2023 Critical No Ranging Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:33:33 1970 Critical DHCP FAILED - Discover sent, no offer received;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:33:26 1970 Critical No Ranging Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:33:21 1970 Critical DHCP FAILED - Request sent, No response;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:31:15 1970 Critical DHCP FAILED - Discover sent, no offer received;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:29:20 1970 Critical No Ranging Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:28:31 1970 Critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=-removed-;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:28:12 1970 Critical DHCP FAILED - Request sent, No response;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:26:04 1970 Critical DHCP FAILED - Discover sent, no offer received;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:16:13 1970 Critical No Ranging Response received - T3 time-out;CM-MAC=-removed-;CMTS-MAC=b0:90:7e:0e:79:d6;CM-QOS=1.1;CM-VER=3.1;