Valued Contributor

Re: Bonded downstream channels

Zip code 27403.  Dropped a DS channel this afternoon after only about 18 hours uptime on the modem.  I looked at the signal page again when I got home after 8 pm, and it was trying and failing to pick up 621 MHz.... it doesn't show up in the Codewords section but momentarily appeared in the Bonded channel section.  Check out the SNR of 16 dB!!  Think that's too noisy to lock the channel?  lol

 

Downstream Bonding Channel Value
Channel ID10 11 12 14 16 17 28 
Frequency507000000 Hz 513000000 Hz 519000000 Hz 525000000 Hz 537000000 Hz 549000000 Hz 555000000 Hz 621000000 Hz 
Signal to Noise Ratio39 dB 39 dB 39 dB 39 dB 38 dB 39 dB 39 dB 16 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
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
1 dBmV  1 dBmV  1 dBmV  1 dBmV  1 dBmV  2 dBmV  2 dBmV  0 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency19400000 Hz 24200000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID5548 5548 5548 5548 
Symbol Rate2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level44 dBmV 45 dBmV 47 dBmV 47 dBmV 
Upstream Modulation[3] QPSK
[2] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID10 11 12 14 16 17 
Total Unerrored Codewords4040810263 4039853356 4039839628 4039862334 4001025839 4001071525 3946226042 
Total Correctable Codewords27 35 51 
Total Uncorrectable Codewords562 1293 473 494 1262 2228 2795 
Valued Contributor

Re: Bonded downstream channels

[ Edited ]

Billie the tech tries to follow up on my issues when he can, but Spectrum is making the bucket truck people work on groups of issues they want worked on, so my complaints are not being addressed.  As you can see, nothing has been fixed.  I am holding channels for half a day, by 18 to 24 hours modem uptime, I am dropping one or more DS channels.  I am down to 7 again as of last night, after 14 hours up.  Modem unsuccessfully trying to pick up 627 MHz but can't.  The signal page shows it trying to get picked up on occasion but look at the SNR on it..... 26 dB.  The DS power is also not flat, a 5 dBmV range between channels.

 

I don't see any options at this point except to buy a 16-channel modem or continue with this daily aggravation and spend another year on this, this time trying to get the state attorney general's dept to do anything..... which I doubt they will, this being North Carolina.

 

Downstream Bonding Channel Value
Channel ID10 13 14 15 16 26 29 
Frequency507000000 Hz 513000000 Hz 531000000 Hz 537000000 Hz 543000000 Hz 549000000 Hz 609000000 Hz 627000000 Hz 
Signal to Noise Ratio36 dB 39 dB 37 dB 39 dB 37 dB 37 dB 40 dB 26 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
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
1 dBmV  1 dBmV  1 dBmV  1 dBmV  2 dBmV  2 dBmV  4 dBmV  0 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency19400000 Hz 24200000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID6961 6961 6961 6961 
Symbol Rate2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level44 dBmV 45 dBmV 46 dBmV 47 dBmV 
Upstream Modulation[3] QPSK
[2] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID10 13 14 15 16 26 
Total Unerrored Codewords3986270644 3985359935 3822909395 3779252333 3779203883 3779191368 3779175197 
Total Correctable Codewords33 29 41 65 79 38 2706 
Total Uncorrectable Codewords584 527 1253 3607 1906 1885 3872 
Expert

Re: Bonded downstream channels

NC and AL were paid off by AT&T & TWC to allow only monopolies, some whacked district court agreed with the states and overroad the FCC that was trying to force antimonopoly and competition there.  . Contact the new govenors office to see what can be done. Next possibility is to contacyt the tv stations engineering dept to see if they can put the heat on Spectrum to fix the issue as wherever the ingress point is, there's also egress interferuiing with the tv channels reception to antenna viewers.   rf chanannels 39-40-41 would be affecting 627 with 40 being the most likely followed by 41.

 The lower s/n is a dead giveaway.

I still think you can find egress points yourself using a cheapie hand held radio provided you can find pilot frequencies

If you've got cable tv service, connect a cable ready set onto the coax and do a scan for all channels.  see if you get a black screen on cable ch 61 which is 445.25 mHz and the commonly used pilot ch  Pick up a cheapie baofeng that has the digital display and go at it walking the street.  That radio also covers the fm radio band, you can probably find points where a weak FM radio stations signal will get suddenly degraded near a cable tv leak from channels 95-99

But back to the cable ready TV..

See if any over the air atsc channels show up, if so, ingress is really bad

If you're internet only and there's a pole trap, see if any ATSC digital channels show up, if so, that indicates the issue is probably in the line between the trap and your receiver.

 Some QAM video channel aliases on TWC display a number similar to a ATSC channel, hopefully your tv is smart enough to show  atsc vs analog ntsc, vs qam digital .

 Encrypted qam might show a qam channel number but a black screen.

 

 FYI. here in the greater cleveland area, I've found hundreds of leaks as I've programmed the pilot into a mobile radio and see them as i drive around the city.... There's old lines still in use from Viacom, Wow, Matrix, Adelphia, Lake,  Western reserve and others that TWC never bothered to replace. My lines here were installed in the late 70's.

The worst leak I've found was downtown by the ballpark and receivable a mile away clearly violating FCC allowable levels. But even a weak and fcc allowable leak can seriously allow ingress from a strong broadcaster to get in and destroy the weak QAM signals.

 The isolation on splitters and tapooffs is only rated with real 75 ohm resistive loads, anc coaxial dammage throws those numbers out as well as open ports anywhere.

 

 

 

 

Established Sharer

Re: Bonded downstream channels

You can see all the uncorrectable errors for yourself.  So why would you think that changing to a 16 channel modem is going to restore your internet service?  That sounds more like the chat desk talking than an intelligent customer.

Valued Contributor

Re: Bonded downstream channels

Karl, I don't think a 16-channel modem will restore decent service, I know it will..... because I have tested it here already a number of times in the course of this issue over the past year.  I have had two different 16-channel modems set up in my office at different times, in tandem with my 8-channel 6141, and also with a 6141 loaned by my Spectrum tech.  The 16-channel modems never drop a channel and speeds are normal consistently.  The 6141s drop regularly.  Clearly the DSP in the 6141s is not handling the noise in the lines, while the 16-channel newer modems are.
Additionally, my next door neighbor on the same tap using a 16-channel from spectrum never has a drop.

Valued Contributor

Re: Bonded downstream channels

This morning's signal page.  here is an example of the SB6141 trying to pick up the channel it dropped (603 MHz).  It will show only 7 DS channels but by constantly refreshing the page, I can see the channel trying to get picked up. 

 

In this capture, it shows the high uncorrectables in the Codeword section but does not show the channel in the Locked Channels section at top.

 

in the capture I will post after this, it shows the low SNR, but the channel does not appear in the Codeword section at bottom.

 

If I reboot the modem, all will look well for a day, until it fails again.  The 6141 is showing these issues, right now, but will not once rebooted.  That's a fault of the modem design, it should recover and pick up the channel, as other brand 8-channel modems do, and as 16-channel modems do.

 

Downstream Bonding Channel Value
Channel ID10 11 13 15 22 23 
Frequency507000000 Hz 513000000 Hz 519000000 Hz 531000000 Hz 543000000 Hz 585000000 Hz 591000000 Hz 
Signal to Noise Ratio36 dB 38 dB 38 dB 38 dB 36 dB 38 dB 39 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
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
0 dBmV  0 dBmV  0 dBmV  0 dBmV  1 dBmV  1 dBmV  2 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency19400000 Hz 24200000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID6476 6476 6476 6476 
Symbol Rate2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level45 dBmV 46 dBmV 47 dBmV 47 dBmV 
Upstream Modulation[3] QPSK
[2] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID10 11 13 15 22 23 25 
Total Unerrored Codewords7878857036 7877873200 7877881287 7865747570 7865720954 7708177755 7662257256 6104609038 
Total Correctable Codewords18 17 28 28 27 78 700 22287 
Total Uncorrectable Codewords1449 482 564 2880 1251 2725 5040 1148879 

 

Valued Contributor

Re: Bonded downstream channels

...and here is the 2nd capture showing the low SNR, but the channel does not appear in the Codeword section at bottom, also from right now.

 

Downstream Bonding Channel Value
Channel ID10 11 13 15 22 23 25 
Frequency507000000 Hz 513000000 Hz 519000000 Hz 531000000 Hz 543000000 Hz 585000000 Hz 591000000 Hz 603000000 Hz 
Signal to Noise Ratio37 dB 39 dB 39 dB 39 dB 37 dB 39 dB 39 dB 22 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
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
0 dBmV  0 dBmV  0 dBmV  0 dBmV  0 dBmV  1 dBmV  1 dBmV  0 dBmV  

 

Upstream Bonding Channel Value
Channel ID
Frequency19400000 Hz 24200000 Hz 30600000 Hz 37000000 Hz 
Ranging Service ID6476 6476 6476 6476 
Symbol Rate2.560 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level45 dBmV 46 dBmV 47 dBmV 47 dBmV 
Upstream Modulation[3] QPSK
[2] 16QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID10 11 13 15 22 23 
Total Unerrored Codewords7912713402 7911729567 7911737654 7899603936 7899577398 7742034330 7696113923 
Total Correctable Codewords18 17 28 29 28 78 700 
Total Uncorrectable Codewords1449 482 564 2880 1251 2725 5040 
Expert

Re: Bonded downstream channels

You have horrible ingress from TV ch 36 or 37 on 603 mHz and only a 22 dB s/n... A different modem can't fix that... It needs TWC to repair the ingress point. You will see that on any other parallel connected modem provided all the jumper cables are good.

 

Highlighted
Valued Contributor

Re: Bonded downstream channels

I have already gone though that months ago.... parallel modems, this one along with a 16-channel.... and I've had low SNR and high uncorrectables just like that on a DS channel on my SB6141, but no issues at all on the 16-channel modem.  I have tested it again and again for months.  All I can figure is the DSP of the 6141 can't handle the noise level the newer modems can, because on the same cable at the same time, I have seen these exact issues on the 6141 while a 16-channel modem give totally normal service. 

 

Yes, there is noise or ingress somewhere, but only this model modem is failing to work with it.

Valued Contributor

Re: Bonded downstream channels

I rebooted the modem in the morning, and then hours later..... what's all this?

 

TimePriorityCodeMessage

May 28 2017 20:44:166-NoticeI401.0TLV-11 - unrecognized OID;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:44:165-WarningZ00.0MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:43:503-CriticalR04.0Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:43:343-CriticalI02.0REG RSP not received;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:43:344-ErrorI271.0T6 Timeout and retries exceeded;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:43:226-NoticeI401.0TLV-11 - unrecognized OID;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:43:225-WarningZ00.0MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 20:42:593-CriticalT05.0SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 15:29:533-CriticalR02.0No Ranging Response received - T3 time-out;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 08:18:506-NoticeI401.0TLV-11 - unrecognized OID;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
May 28 2017 08:18:505-WarningZ00.0MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:17:10:8b:e2:8e;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:156-NoticeN/ACable Modem Reboot due to power reset ;CM-MAC=30:60:23:cc:fe:fc;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;