Uddingston ML5 2 Upstream Channels
28-02-2014, 22:46
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#241
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cf.mega poster
Join Date: Feb 2012
Posts: 4,429
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by General Maximus
Interesting that they have decided to go down the 64qam route rather than bonding a 3rd upstream channel
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I have just upgraded to 152/12 and have these Upstream channels:
Code:
Upstream US-1 US-2 US-3 US-4
Channel Type 2.0 2.0 N/A N/A
Channel ID 1 4 N/A N/A
Frequency (Hz) 46200000 Hz 25800000 Hz N/A N/A
Ranging Status Success Success N/A N/A
Modulation QAM32 QAM16 N/A N/A
Symbol Rate (Sym/sec) 5120000 5120000 N/A N/A
Mini-Slot Size 128 128 N/A N/A
Power Level (dBmV) 33.3 dBmV 34.8 dBmV N/A N/A
T1 Timeouts 0 0 N/A N/A
T2 Timeouts 0 0 N/A N/A
T3 Timeouts 57 57 N/A N/A
T4 Timeouts 0 0 N/A N/A
Primary Upstream Service Flow SFID 29640
Max Traffic Rate 12600000 bps
Max Traffic Burst 16320 bytes
Min Traffic Rate 0 bps
Max Concatenated Burst 16320 bps
Scheduling Type BestEffort
Should I power cycle the shub1 (modem)?
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01-03-2014, 21:08
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#242
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Uddingston ML5 2 Upstream Channels
Give 'em another couple years and they might even catch up with the upload speed BT were giving me in 2012...
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03-03-2014, 00:14
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#243
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cf.mega poster
Join Date: Nov 2010
Location: Stafford
Posts: 4,226
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by qasdfdsaq
Give 'em another couple years and they might announce that they are going tocatch up with the upload speed BT were giving me in 2012 and another 3 years to implement it
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Corrections added
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03-03-2014, 11:23
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#244
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cf.member
Join Date: Dec 2007
Location: Coatbridge (Uddingston UBR)
Services: Virgin Media: TV-XL, 100Mb (Superhub 2), TiVo
Posts: 63
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Re: Uddingston ML5 2 Upstream Channels
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06-03-2014, 17:24
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#245
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Inactive
Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 45
Posts: 13,996
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by General Maximus
Interesting that they have decided to go down the 64qam route rather than bonding a 3rd upstream channel
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Adding a 3rd channel lowers the maximum transmit power using 16QAM to 52dBmV, so you lose both 2dB of SNR and modems that were marginal are now at maximum transmit.
Running at 64QAM over 2 channels maximum transmit power is 54dBmV, and in addition VM can use dynamic upstream modulation, so despite 64QAM requiring a better SNR than 16QAM (27dB vs 21dB after error correction, etc) if the cable is too noisy it can drop down to 32QAM or 16QAM as required.
Can't make allowances for modems that are too attenuated, and indeed a way to raise SNR on the upstream is to apply attenuation. When ntl moved to 16QAM part of the process in at least some cases was to apply 3dB additional attenuation to upstreams, making modems transmit 3dB higher to hit the target power and increasing SNR by 3dB in a stroke.
Once the networks have been properly realigned so no modems are in the danger zone 3rd and 4th channels will appear, possibly together in some cases as the power limits for 4 upstreams are exactly the same as for 3.
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06-03-2014, 18:02
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#246
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Ran Away
Join Date: Nov 2008
Location: Lincoln
Services: phone + 1gbit BB + SkyQ
Posts: 11,021
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Re: Uddingston ML5 2 Upstream Channels
good to know. I think upstream is going to be the next big thing people start flapping about because BT are making a big thing of it and if VM leave everyone at 12mbits even after the upgrades take place it isnt going to look good.
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06-03-2014, 18:19
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#247
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Inactive
Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 45
Posts: 13,996
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by General Maximus
good to know. I think upstream is going to be the next big thing people start flapping about because BT are making a big thing of it and if VM leave everyone at 12mbits even after the upgrades take place it isnt going to look good.
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*Whistles innocently*
WiFi is rubbish for downloads, but...
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06-03-2014, 18:23
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#248
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cf.geek
Join Date: Nov 2011
Location: United Kingdom
Services: YouFibre | Lebara Sim x 2| Plex
Posts: 883
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Re: Uddingston ML5 2 Upstream Channels
My ac router is in now just need to upgrade my pc to usb 3.0
Attachment 25266
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06-03-2014, 18:32
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#249
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by Ignitionnet
*Whistles innocently*
WiFi is rubbish for downloads, but...
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Pah, my best result on WiFi:
http://www.speedtest.net/my-result/1757714849
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06-03-2014, 18:43
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#250
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Inactive
Join Date: Feb 2012
Posts: 408
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by Martin Dee 11
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Nice is it much better different to the 66u?
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07-03-2014, 12:38
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#251
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cf.geek
Join Date: Nov 2011
Location: United Kingdom
Services: YouFibre | Lebara Sim x 2| Plex
Posts: 883
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Re: Uddingston ML5 2 Upstream Channels
High Utilisation For Me
F002847996 No Fix date yet
Attachment 25271
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07-03-2014, 12:47
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#252
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Inactive
Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 45
Posts: 13,996
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Re: Uddingston ML5 2 Upstream Channels
Those all seem fine, I guess it needs the more granular hourly graphs to show. Evidently not that bad!
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07-03-2014, 12:57
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#253
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cf.geek
Join Date: Nov 2011
Location: United Kingdom
Services: YouFibre | Lebara Sim x 2| Plex
Posts: 883
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by Ignitionnet
Those all seem fine, I guess it needs the more granular hourly graphs to show. Evidently not that bad!
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Fix time is currently set at: 12th March 15.00
Attachment 25273
Top speed
Code:
Downstream
DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 299000000 267000000 275000000 283000000 291000000 307000000 315000000 323000000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 85 81 82 83 84 86 87 88
Modulation 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Symbol Rate (Msym/sec) 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level (dBmV) -0.52 -0.44 -0.51 -0.47 -0.47 0.12 -0.01 0.40
RxMER (dB) 38.61 38.26 38.61 38.26 39.40 39.40 39.40 39.40
Pre RS Errors 516 418 322 1079 301 301 336 868
Post RS Errors 280 294 307 1062 300 301 336 868
Code:
Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 N/A N/A 2.0
Channel ID 2 N/A N/A 1
Frequency (Hz) 31000000 N/A N/A 37600000
Ranging Status Success Other Other Success
Modulation 64QAM N/A N/A 64QAM
Symbol Rate (Sym/sec) 5120000 N/A N/A 5120000
Mini-Slot Size 4 N/A N/A 4
Power Level (dBmV) 46.75 N/A N/A 46.75
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0
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07-03-2014, 13:28
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#254
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cf.member
Join Date: Dec 2007
Location: Coatbridge (Uddingston UBR)
Services: Virgin Media: TV-XL, 100Mb (Superhub 2), TiVo
Posts: 63
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Re: Uddingston ML5 2 Upstream Channels
Martin Dee, are you aware if they are looking for people on the Samknows trial just now? Or is it all full up?
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07-03-2014, 13:33
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#255
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cf.geek
Join Date: Nov 2011
Location: United Kingdom
Services: YouFibre | Lebara Sim x 2| Plex
Posts: 883
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Re: Uddingston ML5 2 Upstream Channels
Quote:
Originally Posted by Gstevie
Martin Dee, are you aware if they are looking for people on the Samknows trial just now? Or is it all full up?
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It can take a couple of months for them to get back to you
https://www.samknows.eu/sign-up/
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