Participant

SB6190 - Austin TX - High uncorrectable codewords on one channel;

Startup Procedure

ProcedureStatusComment
Acquire Downstream Channel Locked
Connectivity StateOKOperational
Boot StateOKOperational
Configuration FileOK 
SecurityEnabledBPI+
DOCSIS Network Access EnabledAllowed 

 

 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1Locked256QAM15585.00 MHz3.60 dBmV40.95 dB00
2Locked256QAM2507.00 MHz5.00 dBmV40.95 dB110
3Locked256QAM3513.00 MHz4.40 dBmV40.95 dB150
4Locked256QAM4519.00 MHz4.70 dBmV40.37 dB90
5Locked256QAM5525.00 MHz4.40 dBmV40.37 dB170
6Locked256QAM6531.00 MHz4.30 dBmV40.95 dB170
7Locked256QAM7537.00 MHz4.50 dBmV40.95 dB150
8Locked256QAM8543.00 MHz3.90 dBmV40.37 dB290
9Locked256QAM9549.00 MHz4.40 dBmV40.95 dB90
10Locked256QAM10555.00 MHz3.90 dBmV40.37 dB00
11Locked256QAM11561.00 MHz4.10 dBmV40.37 dB00
12Locked256QAM12567.00 MHz4.00 dBmV40.37 dB00
13Locked256QAM13573.00 MHz3.80 dBmV40.95 dB10
14Locked256QAM14579.00 MHz3.90 dBmV40.37 dB00
15Locked256QAM1501.00 MHz4.80 dBmV40.95 dB3210441
16Locked256QAM16591.00 MHz3.60 dBmV40.37 dB450

 

 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA65120 kSym/s24.20 MHz42.50 dBmV
2LockedATDMA82560 kSym/s37.00 MHz42.50 dBmV
3LockedATDMA75120 kSym/s30.60 MHz42.50 dBmV
4LockedTDMA52560 kSym/s19.40 MHz42.25 dBmV



I have spoken to Tier 3 phones (advanced repair) and supervisors for onsite techs. Can anyone tell me what they think is going on based off the information provided? I do not have a filter between me and the splitter at the drop; at least I didn't the last time I saw the contents of the box with the supervisor.

32 REPLIES 32
Expert

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

bad or loose connection allowing ingress from your local TV ch 19 on 501 mHz for a start.

What's your zip code ?

 

Participant

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

78759

Expert

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

Ch 19 is weaker than 21,22,23 which are the usual Austin culprits, but the levels assume an even pattern and can easily vary 20 dB

 

513,519, 525 are ch's 21,22,23

here's the printout, it's possible ch 19 changed it's profile and not caught in the may 2016 updates...

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3de2cb4e7fe9cbf0

 

at least the s/n is linear on all channels indicating that it's not a continuous problem and there aren't errors on 585 which is the "home" channel

 

 Unless your service degrades, TWC's not going to address this

 

Participant

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

What I see is increasing packetloss. I work in networking, so I know 1-2% packet loss isn't a huge hit, but it appears to be a sign of soemthing else. 

It tends to affect my online gaming alot, which i know is like arguing first world problems; but essentially leads to weird timeouts and it can affect my ability to work from home over VPN;

I see in ym log (i clear it regularly):

Sat Jun 11 06:43:10 20163No Ranging Response received - T3 time-out;CM-MAC=<redacted MAC address>;CMTS-MAC=<redacted MAC address>;CM-QOS=1.1;CM-VER=3.0;


Is this fairly normal?

Expert

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

T3's are "common"  not "normal" especially painfull when they exceed 3 seconds and become a T4 that resets the modem

These are due to multiple bad in house and outside plant shielding and grounding issues that TWC is lax at locating and repairing.

 Those are usually a 5-45 mHz upstream issue and don't affect downstream individual channels in the 54-1002 mHz range

 

Observer

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

Dont mean to hijack, but i have been following this thread as i have been chasing some similar issues.

 

MsRaye, would you comment further re: "Those are usually a 5-45mHz upstream issue"

 

Is it the "ranging response" T3 time out that leads you there? (this is the only error i get in my logs).  While all may be ingress issues, those frequencies are a different animal than the higher VHF and UHF sources. 

 

In any case, just looking to narrow in on the problem.  I am running out of the easy solutions on my end of the plant.  I will open a seperate thread if needed on my specifics

 

Thanks, and good hunting IrishMan...

Expert

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

We, on the CM side can't see the error, s/n and correction on the upstream channels as those are on the CMTS  boxes customers don't have access to

So it takes looking at the levels and logs to try to determine where's the issue. Phone support doesn't do that.

resetting modems clears out the logs making troubleshooting intermittents impossible

 

 

 

Participant

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

Thu Jan 01 00:02:19 19703No Ranging Response received - T3 time-out;CM-MAC=d<redacted MAC address>;CMTS-MAC=<redacted MAC address>;CM-QOS=1.1;CM-VER=3.0;
Thu Jun 16 12:17:03 20165TCS Partial Service;CM-MAC=<redacted MAC address>;CMTS-MAC=<redacted MAC address>;CM-QOS=1.1;CM-VER=3.0;
Thu Jun 16 12:18:05 20163No Ranging Response received - T3 time-out;CM-MAC=<redacted MAC address>;CMTS-MAC=<redacted MAC address>;CM-QOS=1.1;CM-VER=3.0;


Recent log entries

Expert

Re: SB6190 - Austin TX - High uncorrectable codewords on one channel;

don't reset the modem, paste the signal page... something took out a channel or channels to cause partial service, need to see which one(s)