mmelbourne
2 years agoDialled in
Upstream channels dropping to 16QAM
Hi,
I am seeing one or sometimes two of my five upstream channels dropping to 16QAM from 64QAM; is this acceptable or indicative of a fault somewhere (e.g. noise in the system)? I am not seeing obvious issues (no packet loss on BQM etc), but upstream bandwidth testing is variable (on M250 package).
Downstream channels appear fine: power levels and SNR good, and no post-RS errors.
Cheers, Matt
Upstream bonded channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID1 | 49600000 | 45.5 | 5120 | 64 qam | 1 |
2 | 36599961 | 45 | 5120 | 64 qam | 3 |
3 | 23600078 | 44.5 | 5120 | 16 qam | 5 |
4 | 43100000 | 45.3 | 5120 | 64 qam | 2 |
5 | 30100000 | 44.7 | 5120 | 16 qam | 4 |
Upstream bonded channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts1 | ATDMA | 0 | 0 | 2 | 0 |
2 | ATDMA | 0 | 0 | 3 | 0 |
3 | ATDMA | 0 | 0 | 5 | 0 |
4 | ATDMA | 0 | 0 | 1 | 0 |
5 | ATDMA | 0 | 0 | 3 | 0 |
The logs are only showing a few T3 timeouts:
06/04/2024 01:59:31 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
05/04/2024 04:11:20 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
30/03/2024 01:59:31 | Error | DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |
30/03/2024 00:32:30 | critical | No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; |