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Lots of Uncorrectables

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Lots of Uncorrectables

Startup Procedure

Procedure Status Comment
Acquire Downstream Channel   Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK  
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed  

 

 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked 256QAM 28 759.00 MHz 10.40 dBmV 36.39 dB 8553594 916516
2 Locked 256QAM 1 597.00 MHz 5.50 dBmV 36.39 dB 319818 89285
3 Locked 256QAM 2 603.00 MHz 4.10 dBmV 36.39 dB 2298 13930
4 Locked 256QAM 3 615.00 MHz 5.10 dBmV 38.61 dB 743 14410
5 Locked 256QAM 4 621.00 MHz 4.00 dBmV 36.61 dB 1191 13725
6 Locked 256QAM 5 627.00 MHz 9.50 dBmV 40.37 dB 1244 12571
7 Locked 256QAM 6 633.00 MHz 4.40 dBmV 37.64 dB 875 13174
8 Locked 256QAM 7 639.00 MHz 8.20 dBmV 37.64 dB 27441 12222
9 Locked 256QAM 8 645.00 MHz 6.80 dBmV 37.64 dB 2272 13932
10 Locked 256QAM 9 651.00 MHz 8.90 dBmV 36.61 dB 2040239 184721
11 Locked 256QAM 10 657.00 MHz 9.20 dBmV 36.61 dB 643666 135949
12 Locked 256QAM 11 663.00 MHz 6.00 dBmV 37.36 dB 2072 14392
13 Locked 256QAM 12 669.00 MHz 9.40 dBmV 40.37 dB 832 11575
14 Locked 256QAM 13 675.00 MHz 7.70 dBmV 37.64 dB 969 11878
15 Locked 256QAM 14 681.00 MHz 10.80 dBmV 40.37 dB 1001 12384
16 Locked 256QAM 15 687.00 MHz 7.80 dBmV 37.64 dB 2064 13192
17 Locked 256QAM 16 693.00 MHz 8.00 dBmV 38.98 dB 813 11981
18 Locked 256QAM 17 699.00 MHz 9.50 dBmV 38.98 dB 1045 11789
19 Locked 256QAM 18 705.00 MHz 9.70 dBmV 38.98 dB 926 11300
20 Locked 256QAM 19 711.00 MHz 9.80 dBmV 38.98 dB 564 12318
21 Locked 256QAM 20 717.00 MHz 8.90 dBmV 38.61 dB 780 10868
22 Locked 256QAM 21 723.00 MHz 8.60 dBmV 37.36 dB 2170 13766
23 Locked 256QAM 22 729.00 MHz 11.70 dBmV 38.61 dB 836 11779
24 Locked 256QAM 23 735.00 MHz 8.30 dBmV 36.61 dB 83061 40005
25 Locked 256QAM 24 741.00 MHz 8.70 dBmV 39.20 dB 249 10622
26 Locked 256QAM 26 747.00 MHz 6.30 dBmV 36.20 dB 22160 13192
27 Locked 256QAM 27 753.00 MHz 7.60 dBmV 36.40 dB 21322 18815
28 Locked 256QAM 29 765.00 MHz 5.10 dBmV 36.20 dB 340 10839
                 

 

 
Tue May 15 08:50:08 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Thu May 17 09:43:19 2018 3 No Ranging Response received - T3 time-out;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Fri May 18 15:02:18 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Fri May 18 15:02:21 2018 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Fri May 18 15:02:44 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=00:01:5c:6b:4c:67;CM-QOS=1.1;CM-VER=3.0;
Fri May 18 15:07:46 2018 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Sat May 19 02:32:11 2018 3 No Ranging Response received - T3 time-out;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Mon May 21 07:54:45 2018 5 RCS Partial Service;CM-MAC=2c:7e:81:2c:2b:73;CMTS-MAC=00:01:5c:6b:4c:67;CM-QOS=1.1;CM-VER=3.0;
Mon May 21 07:54:45 2018 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Mon May 21 07:54:45 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Mon May 21 23:49:06 2018 3 No Ranging Response received - T3 time-out;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Wed May 23 09:15:33 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Wed May 23 09:34:29 2018 3 No Ranging Response received - T3 time-out;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Thu May 24 04:58:41 2018 5 RCS Partial Service;CM-MAC=2c:7e:81:2c:2b:73;CMTS-MAC=00:01:5c:6b:4c:67;CM-QOS=1.1;CM-VER=3.0;
Thu May 24 04:58:41 2018 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Thu May 24 04:58:41 2018 5 RCS Partial Service;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
Thu May 24 11:04:47 2018 3 No Ranging Response received - T3 time-out;CM-MAC=X:X:X:X:X:X;CMTS-MAC=00:01:5c:6b:4c:67;CM-QOS=1.1;CM-VER=3.0;
Thu May 24 18:56:08 2018 4 Service Add Response rejected - Invalid transaction ID;CM-MAC=X:X:X:X:X:X;CMTS-MAC=X:X:X:X:X:X;CM-QOS=1.1;CM-VER=3.0;
 
Cable modems die pretty fast on my account. I had SB 6141 died less than 2 years; SB 6183 died 3 weeks ago, less than 2 years. I got the SB6190 to replace the SB6183. The TV never works on my line. Since it is a basic TV, so I didn't bother.

With the new modem SB6190 I have to place it behind a split. Without the split, the Downstream Bonded Channels Power levels is way above +18 dBmV.

This is a single cable line, from outside connect to the modem.

Does it look normal?

Thanks.

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Expert

Re: Lots of Uncorrectables

Oh boy. Let's get an employee to help you. 

 

I've asked an employee to check the CMTS for real-time and historical RF signal reports from your modem. They can also check your local node/plant for any degradation or error reports. You can expect a reply in this thread. 


I am not an employee.
Valued Contributor

Re: Lots of Uncorrectables

The signal going to your modem is still pretty hot and needs to come down around another 10dB (-5 to +5 is ideal).  The one problem that I see standing out is your channel response is all over the place.  As far as what you can check on your end you mentioned you have a splitter behind the modem, just make sure it is a good quality splitter (not a gold RCA one) and all your fittings and jumpers are torqued properly.  Other than that I would say you might want to have a sevice call because there isn't anything you can do to balance those levels.  

Official Employee

Re: Lots of Uncorrectables

 

bolddonkey, if you're seeing issue on the modem and the TV, sounds like there may be noise on the line from the plant. Perhaps. Let's check. Please send me a private message with your full name, address, and phone number tied to your residential services for help.

Expert

Re: Lots of Uncorrectables

For curiosity, what do the upstream power level figures look like ?



I am not a Comcast Employee.
I am a fellow customer, volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Mark the post as best answer!
Regular Visitor

Re: Lots of Uncorrectables

Thank you all for the replies and suggestions. After the 4th time to buy the new modem, I started digging around to look for answer for my problem. After scanning the forum, I saw some answers about downstream channel high power and suggestion to put the modem behind the Extreme splitter to lower it. I got the recommend Extreme brand. It hekps to lower the power from +18 something dBmV to what it is now.

 

I am going to message ComcastFenF for further assistance.

 

Expert

Re: Lots of Uncorrectables

Upstream power levels ?



I am not a Comcast Employee.
I am a fellow customer, volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Mark the post as best answer!
Official Employee

Re: Lots of Uncorrectables

Thank you all for the replies and suggestions. After the 4th time to buy the new modem, I started digging around to look for answer for my problem. After scanning the forum, I saw some answers about downstream channel high power and suggestion to put the modem behind the Extreme splitter to lower it. I got the recommend Extreme brand. It hekps to lower the power from +18 something dBmV to what it is now.

 

I am going to message ComcastFenF for further assistance.

Cool.