Contributor
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131 Messages
CM2050V T3 errors, Uncorrectables and disconnects
A couple of months ago I replaced my old reliable CM600 with the CM2050V so I could make full use of my 900Mbps plan. Since then, I have noticed that over the 32 Bonded Channels that I'm getting alot of Correctables and Uncorrectable each day, and the Error Log is showing alot of T3 and other errors. I can actually tell when this happens as I could be browsing or downloading and everything just stops for a minute or two. I've been replaced the older CommScope 2 Way splitter Comcast installed 5-6 years ago with a new one, but no difference.
Here is a copy of my Signal Strength and Error Log:
SammyFL
Contributor
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131 Messages
3 years ago
I replaced the CommScope 2 Way splitter with a different brand (Extreme Broadband) today to see if that makes a difference with the errors. Here are my current signal levels:
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SammyFL
Contributor
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131 Messages
3 years ago
It's been about 30 hours, no Uncorrectables or T3 and Ranging errors
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SammyFL
Contributor
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131 Messages
3 years ago
Someone had asked what my modem signal would be without any splitters, so I removed the two way (-3.5db) splitter and checked the levels. To be the downstream power is a but too high pushing +10dbmv.
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SammyFL
Contributor
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131 Messages
3 years ago
So after a few days now, since replacing the Comcast installed CommScope 2 Way splitter from 5-6 years ago with a brand new splitter (Extreme Broadband) I haven't had any Uncorrectables or T3 Errors . I check it w few times a day/night.
Current signal.
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SammyFL
Contributor
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131 Messages
3 years ago
About 15 minutes ago I noticed the cable tv picture was getting jumbled and pixelated and also the internet went out. So I checked my modems signal and it shows Uncorrectables and the error log shows T3 Errors:
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16 consecutive T3 timeouts while trying to range on upstream channel 3;C
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
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SammyFL
Contributor
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131 Messages
3 years ago
About 15 minutes ago I noticed the cable tv picture was getting jumbled and pixelated and also the internet went out. So I checked my modems signal and it shows Uncorrectables and the error log shows T3 Errors:
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SammyFL
Contributor
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131 Messages
3 years ago
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SammyFL
Contributor
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131 Messages
3 years ago
Dynamic Range Window violation
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW
CM-STATUS message sent. Event Type Code: 24; Chan ID: 41;
Started Unicast Maintenance Ranging - No Response received - T3 time-out;
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
16 consecutive T3 timeouts while trying to range on upstream channel 3;
Unicast Maintenance Ranging attempted - No response - Retries exhausted;
Started Unicast Maintenance Ranging - No Response received - T3 time-out
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SammyFL
Contributor
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131 Messages
3 years ago
I did a search and can't find anything specific about what this one error means that I keep getting:
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW.
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SammyFL
Contributor
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131 Messages
3 years ago
@EG
Still trying to get to the bottom of the problem. I've tried 3 different brands of 2 way splitters and new RG6 cable. My levels listed below are good, but still get codeword errors and "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW".
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SammyFL
Contributor
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131 Messages
3 years ago
@EG
Cable Connection
Cancel Apply
Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
399000000
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 501000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 13 501000000 Hz 4.9 dBmV 41.9 dB 135 126
2 Locked QAM256 10 483000000 Hz 5.0 dBmV 41.7 dB 148 144
3 Locked QAM256 11 489000000 Hz 4.9 dBmV 41.8 dB 135 147
4 Locked QAM256 12 495000000 Hz 5.0 dBmV 41.9 dB 116 142
5 Locked QAM256 14 507000000 Hz 4.8 dBmV 41.8 dB 150 131
6 Locked QAM256 15 513000000 Hz 4.7 dBmV 41.7 dB 133 121
7 Locked QAM256 16 519000000 Hz 4.5 dBmV 41.7 dB 120 129
8 Locked QAM256 17 525000000 Hz 4.3 dBmV 41.7 dB 116 147
9 Locked QAM256 18 531000000 Hz 4.1 dBmV 41.5 dB 74 154
10 Locked QAM256 19 537000000 Hz 4.1 dBmV 41.5 dB 105 151
11 Locked QAM256 20 543000000 Hz 4.0 dBmV 41.5 dB 116 132
12 Locked QAM256 21 555000000 Hz 4.0 dBmV 41.5 dB 109 88
13 Locked QAM256 22 561000000 Hz 4.2 dBmV 41.6 dB 89 112
14 Locked QAM256 23 567000000 Hz 4.3 dBmV 41.5 dB 85 135
15 Locked QAM256 24 573000000 Hz 4.5 dBmV 41.5 dB 85 132
16 Locked QAM256 25 579000000 Hz 4.5 dBmV 41.5 dB 51 137
17 Locked QAM256 26 585000000 Hz 4.7 dBmV 41.6 dB 53 121
18 Locked QAM256 27 591000000 Hz 5.1 dBmV 41.7 dB 57 116
19 Locked QAM256 28 597000000 Hz 5.1 dBmV 41.7 dB 37 109
20 Locked QAM256 29 603000000 Hz 5.4 dBmV 41.8 dB 40 109
21 Locked QAM256 30 609000000 Hz 5.6 dBmV 41.8 dB 38 123
22 Locked QAM256 31 615000000 Hz 5.5 dBmV 41.7 dB 37 116
23 Locked QAM256 32 621000000 Hz 5.4 dBmV 41.6 dB 42 100
24 Locked QAM256 33 627000000 Hz 5.3 dBmV 41.5 dB 60 116
25 Locked QAM256 34 633000000 Hz 5.6 dBmV 41.5 dB 36 130
26 Locked QAM256 35 639000000 Hz 5.7 dBmV 41.3 dB 33 115
27 Locked QAM256 36 645000000 Hz 5.8 dBmV 41.2 dB 28 97
28 Locked QAM256 37 651000000 Hz 5.9 dBmV 41.5 dB 22 109
29 Locked QAM256 38 657000000 Hz 5.8 dBmV 41.5 dB 30 86
30 Locked QAM256 39 663000000 Hz 6.1 dBmV 41.7 dB 64 102
31 Locked QAM256 40 669000000 Hz 6.6 dBmV 41.9 dB 48 124
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 1 5120 35600000 Hz 41.3 dBmV
2 Locked ATDMA 2 5120 29200000 Hz 42.0 dBmV
3 Locked ATDMA 3 5120 22800000 Hz 42.0 dBmV
4 Locked ATDMA 4 5120 16400000 Hz 41.8 dBmV
5 Locked ATDMA 5 1280 39600000 Hz 41.5 dBmV
6 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 0 Hz 0.0 dBmV
Downstream OFDM Channels
Channel Lock Status Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier
Number Range Unerrored
Codewords Correctable
Codewords Uncorrectable
Codewords
1 Locked 0 ,1 ,2 ,3 41 690000000 Hz 8.4 dBmV 42.5 dB 1108 ~ 2987 210428882 165639966 181
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 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
Current System Time:Tue Mar 08 19:32:12 2022
System Up Time:04:43:11
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SammyFL
Contributor
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131 Messages
3 years ago
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SammyFL
Contributor
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131 Messages
3 years ago
@EG
Dynamic Range Window violation
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW
CM-STATUS message sent. Event Type Code: 24; Chan ID: 41
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW
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SammyFL
Contributor
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131 Messages
3 years ago
@EG @XfinityMarcos As you can see my signals are in spec, not getting any T3 Errors for now, but still getting Uncorrectables and events in the error long listed above. A tech is scheduled to come out on the 15th, but I'm not sure what else he can do. The last time a tech was here 5 years ago, my CM600 kept rebooting because the downstream power in my area had been increased to +15dbmv, and he had to install new splitters and a -6db attenuator to lower the signal down. But since then Comcast "fixed" the high downstream power and no longer needed the -6db attenuator. So have just been using a -3.5db two way splitter
(edited)
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SammyFL
Contributor
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131 Messages
3 years ago
@XfinityMarcos Here is today's signal, still in spec , but shows thousands of Uncorrectables and a T3 error:
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