Confirm SB6141 Values

Hello all just came over to TWC from AT&T and need some help to determine if my SB6141 (owned not leased) is getting the proper up and down stream values. I am getting quite a few critical errors "No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;" in the log file and not sure what it means. We experience some slowness on and off and not sure if this is related.


This type of information is new to me and not sure if I have a problem with the modem or TWC connections.


Signal Stats (Codewords)Bonding Channel Value
Channel ID11 12 
Total Unerrored Codewords13079075146 12893091962 12893150592 12834512285 12834320354 12832329464 11643256731 
Total Correctable Codewords675 749 701 689 1246 1140 1113 
Total Uncorrectable Codewords5013 7707 6385 10210 8580 11569 58395 


UpstreamBonding Channel Value
Channel ID
Frequency30600000 Hz 24200000 Hz 19400000 Hz 37000000 Hz 
Ranging Service ID4479 4479 4479 4479 
Symbol Rate5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 2.560 Msym/sec 
Power Level44 dBmV 42 dBmV 42 dBmV 44 dBmV 
Upstream Modulation[3] QPSK[3] QPSK[3] QPSK[3] QPSK
[1] 16QAM[1] 16QAM[2] 16QAM[3] 16QAM
[2] 64QAM[2] 64QAM  
Ranging Status    


DownstreamBonding Channel Value
Channel ID11 12 
Frequency555000000 Hz 585000000 Hz 591000000 Hz 597000000 Hz 603000000 Hz 615000000 Hz 621000000 Hz 
Signal to Noise Ratio37 dB 37 dB 38 dB 38 dB 38 dB 39 dB 38 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level4 dBmV  2 dBmV  3 dBmV  4 dBmV  5 dBmV  7 dBmV  7 dBmV  

The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

Everyone's Tags (3)

Re: Confirm SB6141 Values

Who installed this cable and when?

What's your zip code?

Looks like bad broadcast TV ingress


Re: Confirm SB6141 Values

Cable was installed around 2-3 years ago by TWC when I first moved in then we switched to ATT shortly after. Zip code is 27455.


What values are you looking at to say there is ingress? We only have internet connection with TWC, no TV, Phone, or other services, only internet.


Re: Confirm SB6141 Values

Sorry but something is corroded or loose or has a bad connector on it or theres splitters with open ports, 5 out of 6 skipped channels have local tv transmitters on them, ch 29,30,31,32,33,36.

 How much of the TWC coax did AT&T use? The TWC modem must be direct connected to the outside grounding block, no splitters, doublecheck that line.


Re: Confirm SB6141 Values

AT&T put in there own line so they did not touch the TWC line originally put in. The modem is connected to the main line and there are no splitters in my house.


Could you explain how you come to the conclusion something is corroded or looese or has bad connectors? What values in the information I posted is leading you to that conclusion? I am trying to understand myself what the figures mean but need users like you to explain it to me.


Re: Confirm SB6141 Values

skipped channels and wide variations in total to uncorrected bytes... indicate ingress and in your case broadcast tv...

 Google "broadcast tv ingress on Cable system"