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Monday, February 28th, 2022

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Not all downstream channels are locked

I switched to a new Modem/Router combo (Netgear CAX80) and since installing it, I have experienced some intermittent latency issues mostly affecting latency sensitive apps like MS Teams conferencing and Zoom Meetings. 

Working with Netgear support they noted that the Modem is reporting a POOR Internet connection as one of the 32 downstream channels is not locked.   Below is the info from the status page.    Xfinity reports no issues and I have double checked cable connections are clean and tight.

Any adice/thoughts on what might be the issue ?


Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked 256 QAM 5 501000000 Hz 8.8 dBmV 42.8 dB 0 0
2 Locked 256 QAM 2 483000000 Hz 8.8 dBmV 42.8 dB 0 0
3 Locked 256 QAM 3 489000000 Hz 8.8 dBmV 42.9 dB 0 0
4 Locked 256 QAM 4 495000000 Hz 8.8 dBmV 42.8 dB 0 0
5 Locked 256 QAM 6 507000000 Hz 9.0 dBmV 42.9 dB 0 0
6 Locked 256 QAM 7 513000000 Hz 8.9 dBmV 42.9 dB 0 0
7 Locked 256 QAM 8 519000000 Hz 8.9 dBmV 42.9 dB 0 0
8 Locked 256 QAM 9 525000000 Hz 9.0 dBmV 43.0 dB 0 0
9 Locked 256 QAM 10 531000000 Hz 8.8 dBmV 42.8 dB 0 0
10 Locked 256 QAM 11 537000000 Hz 8.9 dBmV 42.8 dB 0 0
11 Locked 256 QAM 12 543000000 Hz 8.8 dBmV 42.7 dB 0 0
12 Locked 256 QAM 13 555000000 Hz 8.9 dBmV 42.8 dB 0 0
13 Locked 256 QAM 14 561000000 Hz 9.0 dBmV 43.0 dB 0 0
14 Locked 256 QAM 15 567000000 Hz 9.0 dBmV 43.0 dB 0 0
15 Locked 256 QAM 16 573000000 Hz 9.2 dBmV 43.1 dB 0 0
16 Locked 256 QAM 17 579000000 Hz 9.2 dBmV 43.2 dB 0 0
17 Locked 256 QAM 18 585000000 Hz 9.2 dBmV 43.1 dB 0 0
18 Locked 256 QAM 19 591000000 Hz 9.2 dBmV 43.0 dB 0 0
19 Locked 256 QAM 20 597000000 Hz 9.4 dBmV 43.1 dB 0 0
20 Locked 256 QAM 21 603000000 Hz 9.5 dBmV 43.3 dB 0 0
21 Locked 256 QAM 22 609000000 Hz 9.6 dBmV 43.3 dB 0 0
22 Locked 256 QAM 23 615000000 Hz 9.7 dBmV 43.3 dB 0 0
23 Locked 256 QAM 24 621000000 Hz 10.0 dBmV 43.4 dB 0 0
24 Locked 256 QAM 25 627000000 Hz 9.8 dBmV 43.3 dB 0 0
25 Locked 256 QAM 27 633000000 Hz 10.1 dBmV 43.4 dB 0 0
26 Locked 256 QAM 28 639000000 Hz 10.2 dBmV 43.6 dB 0 0
27 Locked 256 QAM 29 645000000 Hz 10.2 dBmV 43.6 dB 0 0
28 Locked 256 QAM 30 651000000 Hz 10.2 dBmV 43.4 dB 0 0
29 Locked 256 QAM 31 657000000 Hz 10.2 dBmV 43.5 dB 0 0
30 Locked 256 QAM 32 663000000 Hz 10.4 dBmV 43.6 dB 0 0
31 Locked 256 QAM 33 669000000 Hz 10.6 dBmV 43.6 dB 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 9 1280 Ksym/sec 39600000 Hz 40.8 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 35600000 Hz 34.8 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29200000 Hz 35.3 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 22800000 Hz 35.5 dBmV
5 Locked ATDMA 4 5120 Ksym/sec 16400000 Hz 35.8 dBmV
6 Not Locked Unknown 0 0 0 0.0 dBmV
7 Not Locked Unknown 0 0 0 0.0 dBmV
8 Not Locked Unknown 0 0 0 0.0 dBmV
 
Downstream OFDM Channels
Channel Lock
Status		 Modulation /
Profile ID		 Channel
ID		 Frequency Power SNR /
MER		 Active Subcarrier
Number Range		 Unerrored
Codewords		 Correctable
Codewords		 Uncorrectable
Codewords
1 Locked 0 ,1 ,2 ,3 45 690000000 Hz 11.48 dBmV 43.8 dB 1108 ~ 2987 2565586880 1468830777 0
2 Not Locked 0 0 0 Hz 0 dBmV 0 dB 0 ~ 4095 0 0 0
 
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

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