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rchandra
Stargate Universe fan
Premium
join:2000-11-09
14225-2105

[TWC] more SB6120 blue lights

I noticed something didn't look quite normal with my cable modem yesterday...then finally it dawned on me: it went from two blue lights (RECEIVE, LINK) to three (also SEND). So it looks like the Buffalo, NY area was upgraded to bonded upstream channels.

Thanks.
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motorola870

join:2008-12-07
Arlington, TX
kudos:3

said by rchandra:

I noticed something didn't look quite normal with my cable modem yesterday...then finally it dawned on me: it went from two blue lights (RECEIVE, LINK) to three (also SEND). So it looks like the Buffalo, NY area was upgraded to bonded upstream channels.

Thanks.

interesting can you post a screen shot of the signals from 192.168.100.1? I know with the SB6120 you can't get anymore than 4 downstreams.


rchandra
Stargate Universe fan
Premium
join:2000-11-09
14225-2105

Click for full size

Downstream Bonding Channel Value
Channel ID 1 2 3 4
Frequency 705000000 Hz 711000000 Hz 717000000 Hz 723000000 Hz
Signal to Noise Ratio 37 dB 38 dB 38 dB 37 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power LevelThe Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
10 dBmV 10 dBmV 10 dBmV 10 dBmV

Upstream Bonding Channel Value
Channel ID 8 7 6 5
Frequency 37000000 Hz 33800000 Hz 30600000 Hz 27400000 Hz
Ranging Service ID 8247 8247 8247 8247
Symbol Rate 2.560 Msym/sec 2.560 Msym/sec 2.560 Msym/sec 2.560 Msym/sec
Power Level 46 dBmV 46 dBmV 46 dBmV 45 dBmV
Upstream Modulation [3] QPSK
[2] 16QAM
[3] QPSK
[2] 16QAM
[3] QPSK
[2] 16QAM
[3] QPSK
[2] 16QAM

Ranging Status Success Success Success Success

Signal Stats (Codewords) Bonding Channel Value
Channel ID 1 2 3 4
Total Unerrored Codewords 537027905 537028133 537028311 537028312
Total Correctable Codewords 65 1 0 1
Total Uncorrectable Codewords 626 606 553 673

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English is a difficult enough language to interpret correctly when its rules are followed, let alone when a writer chooses not to follow those rules.

Jeopardy! replies and randomcaps REALLY suck!

Lightning7

join:2013-02-02
Brunswick, OH

your downstream is way too high! 10 dBmV to be in fact, should be close to 0 as possible. Mines always around 0.0 to 1.0 on all 4 channels bonded. Upstream looks ok. Prefer to be in the low to mid 40's. Mine is around 43.5 dBmV and can go to 42.0 at times with a 1.5 dBmV variance.



rchandra
Stargate Universe fan
Premium
join:2000-11-09
14225-2105

maybe, but with around half a billion unerrored codewords per channel and only around 600 uncorrecables each, I'm not exceptionally worried. That's a fairly good "batting ave."



swintec
Premium,VIP
join:2003-12-19
Alfred, ME
kudos:5
Reviews:
·Time Warner Cable
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reply to Lightning7

said by Lightning7:

your downstream is way too high! 10 dBmV to be in fact, should be close to 0 as possible.

10 is still within spec.

I had a modem work for years at -18 - -19dBmV..dont know how but it did.
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Lightning7

join:2013-02-02
Brunswick, OH
reply to rchandra

does anybody know why my SNR has gone from 40 to like 37? I just checked it and now it back to 40-41. what hell.


Lightning7

join:2013-02-02
Brunswick, OH
reply to rchandra

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 66 111000000 Hz 0.0 dBmV 41.9 dB 0 0
2 Locked QAM256 65 105000000 Hz 0.0 dBmV 39.5 dB 1984 0
3 Locked QAM256 67 117000000 Hz -1.0 dBmV 40.8 dB 0 0
4 Locked QAM256 68 123000000 Hz -1.4 dBmV 40.9 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 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 TDMA and ATDMA 1 2560 Ksym/sec 32000000 Hz 43.5 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Current System Time: Sat Feb 02 16:11:48 2013


Jabbu
Premium
join:2002-03-06
reply to rchandra

Please do not post +10db is too high, this is extremely false.

There is no difference in modem reliability between +10, 0, and yes even -10 as long as the signal is clean.

Buffalo is upgrading for upstream bonding, one cmts at a time.



motorola870

join:2008-12-07
Arlington, TX
kudos:3

said by Jabbu:

Please do not post +10db is too high, this is extremely false.

There is no difference in modem reliability between +10, 0, and yes even -10 as long as the signal is clean.

Buffalo is upgrading for upstream bonding, one cmts at a time.

interesting the Dallas cluster got upstream bonding enabled by just rebooting the modems as they configured it and let modems lock on to all 4 channels after a reboot and then there was a global reboot that got everyone with a D3.0 modem upstream bonding. It helped that North Texas had already enabled 4 upstreams that were not bonded just needed to reconfigure the CMTS config files to allow for upstream bonding.

Lightning7

join:2013-02-02
Brunswick, OH
reply to Jabbu

So is my signal good? I mean look at 105 Mhz its got errors but why?



Jabbu
Premium
join:2002-03-06

10500000 Hz = 105 MHz = FM station.

Possible some FM is getting into the plant and creating some very minor errors and dropping the SNR 2db, which in reality is nothing. Your log shows correctable errors, which should not be "felt".

What was your total codeword count?


Lightning7

join:2013-02-02
Brunswick, OH

I have rebooted the modem and this is what it is now but still getting those errors in the 105 Mhz freq.

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 65 105000000 Hz 0.8 dBmV 38.2 dB 124 0
2 Locked QAM256 66 111000000 Hz 0.8 dBmV 39.5 dB 0 0
3 Locked QAM256 67 117000000 Hz -0.2 dBmV 38.4 dB 0 0
4 Locked QAM256 68 123000000 Hz -0.6 dBmV 39.0 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 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 TDMA and ATDMA 1 2560 Ksym/sec 32000000 Hz 43.2 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV


motorola870

join:2008-12-07
Arlington, TX
kudos:3

said by Lightning7:

I have rebooted the modem and this is what it is now but still getting those errors in the 105 Mhz freq.

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File
Security Enabled BPI+

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 65 105000000 Hz 0.8 dBmV 38.2 dB 124 0
2 Locked QAM256 66 111000000 Hz 0.8 dBmV 39.5 dB 0 0
3 Locked QAM256 67 117000000 Hz -0.2 dBmV 38.4 dB 0 0
4 Locked QAM256 68 123000000 Hz -0.6 dBmV 39.0 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 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 TDMA and ATDMA 1 2560 Ksym/sec 32000000 Hz 43.2 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

it would be expected that you would get errors here and there on 105MHz as it is also used by FM radio which can cause noise on the cable system. My area uses frequencies from 783MH-813MHz and I have errors on 807MHz and 813MHz which are in the PCS bands so I too should have a small amount of noise but not a lot of noise.

Lightning7

join:2013-02-02
Brunswick, OH

whats your signal levels?



motorola870

join:2008-12-07
Arlington, TX
kudos:3

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 5 807000000 Hz -5.0 dBmV 35.3 dB 1005 0
2 Locked QAM256 1 783000000 Hz -2.9 dBmV 37.6 dB 56 0
3 Locked QAM256 2 789000000 Hz -3.5 dBmV 37.3 dB 105 0
4 Locked QAM256 3 795000000 Hz -4.0 dBmV 36.6 dB 211 0
5 Locked QAM256 4 801000000 Hz -4.3 dBmV 36.5 dB 381 0
6 Locked QAM256 6 813000000 Hz -4.9 dBmV 36.7 dB 707 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 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 TDMA and ATDMA 10 2560 Ksym/sec 33000000 Hz 42.5 dBmV
2 Locked TDMA and ATDMA 9 2560 Ksym/sec 36500000 Hz 42.5 dBmV
3 Locked TDMA and ATDMA 11 2560 Ksym/sec 29500000 Hz 42.5 dBmV
4 Locked TDMA and ATDMA 12 2560 Ksym/sec 24500000 Hz 42.5 dBmV

Lightning7

join:2013-02-02
Brunswick, OH

Not bad but your upstream is really good even though your downstream is -4 to -5 mostly. are you using the SBG6580? Earlier today my SNR was at 42 dB (usually that's what it is normally) but now it's between 37-39 dB. Why is that?



motorola870

join:2008-12-07
Arlington, TX
kudos:3

yes it is a SBG6580. There are swings in the SNR when the temperature changes especially when it goes from cold temps to hot temps which causes the cable to expand and contract.


Lightning7

join:2013-02-02
Brunswick, OH

I think it's Time Warner doing something because it always does that from time to time. In the past it did that. I doubt its the temp or weather cuz even in bad weather my signal is dead on perfect so. I think it boils down to the ISP (Time Warner Cable).



hobgoblin
Sortof Agoblin
Premium
join:2001-11-25
Orchard Park, NY
kudos:11

"I think it's Time Warner doing something because it always does that from time to time. In the past it did that. I doubt its the temp or weather cuz even in bad weather my signal is dead on perfect so. I think it boils down to the ISP (Time Warner Cable)."

So what issues are you having with your perfectly acceptable SNR levels.

Hob
--
"A foolish consistency is the hobgoblin of little minds."
- Ralph Waldo Emerson