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Correctable codewords 50% of codewords on 2 channels?

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Regular Visitor

Correctable codewords 50% of codewords on 2 channels?

Hello, a new cable was installed from the cable terminal / pylon on the street to my house recently and was disconnected and reconnected when Xfinity/Comcast buried the cable today.  The Internet service is working, but I noticed on my CGM4140COM XB6 gateway stats that Correctable Codewords for indexes 1 and 33 are consistently about 50% of all Codewords on those channels/indexes.  This percentage remains about the same over time as the Unerrored Codewords and Correctable Codewords increment on those indexes.   The Uncorrectable Codewords on 1 and 33 are both 0.  All other indexes/channels 2-32 have 0 Correctable Codewords and 0 Uncorrectable Codewords.    While the Codeword errors are all correctable, the high percentage of correctable codewords seems undesirable and indicative of some interference.  Is this persistently high level of correctable codewords considered to be a problem by Comcast/Xfinity?  What can be done to reduce or eliminate these errors?  @ComcastTambrey  @ComcastJoeTru   

Highlighted
Diamond Problem Solver

Re: Correctable codewords 50% of codewords on 2 channels?

Try resetting your gateway

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Highlighted
Regular Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

Thanks. I have reset it and the results are the same following each reset.
Highlighted
Regular Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

Vendor: Technicolor
BOOT Version: S1TC-3.49.18.14
Core Version: 1.0
Model: CGM4140COM
Product Type: XB6
Flash Part: 8192 MB
Download Version: Prod_18.1_d31 & Prod_18.1
 
 
 
Highlighted
Regular Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

Downstream
Channel Bonding Value
Index
37
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
38
39
40
41
42
43
44
159
Lock Status
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Frequency
681 MHz
531 MHz
537 MHz
543 MHz
555 MHz
561 MHz
567 MHz
573 MHz
579 MHz
585 MHz
591 MHz
597 MHz
603 MHz
609 MHz
615 MHz
621 MHz
627 MHz
633 MHz
639 MHz
645 MHz
651 MHz
657 MHz
663 MHz
669 MHz
675 MHz
687 MHz
693 MHz
699 MHz
705 MHz
711 MHz
717 MHz
723 MHz
805 MHz
707600000
SNR
38.9 dB
40.1 dB
40.0 dB
40.1 dB
40.2 dB
40.1 dB
40.1 dB
40.1 dB
40.2 dB
40.1 dB
40.0 dB
40.0 dB
39.8 dB
39.9 dB
39.7 dB
39.6 dB
39.7 dB
39.7 dB
39.4 dB
39.4 dB
39.3 dB
39.2 dB
39.3 dB
39.3 dB
38.7 dB
39.0 dB
38.9 dB
38.9 dB
38.9 dB
39.0 dB
38.7 dB
38.9 dB
37.8 dB
NA
Power Level
1.9 dBmV
2.3 dBmV
2.3 dBmV
2.3 dBmV
2.3 dBmV
2.2 dBmV
2.3 dBmV
2.2 dBmV
2.4 dBmV
2.4 dBmV
2.4 dBmV
2.5 dBmV
2.4 dBmV
2.3 dBmV
2.2 dBmV
2.3 dBmV
2.4 dBmV
2.5 dBmV
2.3 dBmV
2.0 dBmV
2.0 dBmV
2.0 dBmV
2.1 dBmV
2.2 dBmV
2.3 dBmV
1.9 dBmV
1.8 dBmV
2.0 dBmV
2.2 dBmV
2.3 dBmV
2.0 dBmV
1.9 dBmV
1.6 dBmV
NA
Modulation
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
OFDM
OFDM

Upstream
Channel Bonding Value
Index
1
2
3
4
Lock Status
Locked
Locked
Locked
Locked
Frequency
36 MHz
30 MHz
23 MHz
17 MHz
Symbol Rate
5120
5120
5120
5120
Power Level
35.8 dBmV
36.3 dBmV
37.3 dBmV
37.8 dBmV
Modulation
QAM
QAM
QAM
QAM
Channel Type
ATDMA
ATDMA
ATDMA
ATDMA
CM Error Codewords
Index
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Unerrored Codewords
1119121067
1432815333
1432821195
1432824756
1432830920
1432834070
1432837162
1432843709
1432852870
1432858323
1432863436
1432868772
1432872452
1432877373
1432883778
1432886839
1432909606
1432913434
1432915535
1432923150
1432929289
1432933642
1432938349
1432944804
1432950527
1432954217
1432959786
1432964568
1432969884
1432974026
1432975572
1432977998
1119121067
Correctable Codewords
979826202
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
979826202
Uncorrectable Codewords
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Highlighted
Frequent Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

I have the exact same issue. I have a 1000 MBps plan and everything on the signal is perfect with a SNR over 40. I can’t get more than 650 MBps when connected directly into the modem.

Same ask you, first and last channels with high correctable errors.

I have checked the wiring end to end but haven’t found anything.
Highlighted
Frequent Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

It happens on Channel 1 and Channel 32. Thoughts anyone? 

I can't get over 600 Mbit on a 1000Mbit Plan even when directed to the modem. 

Annotation 2020-05-21 075951.png
Highlighted
Regular Visitor

Re: Correctable codewords 50% of codewords on 2 channels?

I am seeing the same thing.  About 40% correctable codeword errors on channels 1 and 32.  And the numbers for the two channels are identical, which is strange.  I am usually only able to get 450-500 mbps vs the 1 gbps I am paying for.  There was a period of a day when I was able to get over 900, so I know my equipment is capable.