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-   -   120M : Uddingston ML5 2 Upstream Channels (https://www.cableforum.uk/board/showthread.php?t=33694172)

ianch99 28-02-2014 22:46
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by General Maximus (Post 35676373)
Interesting that they have decided to go down the 64qam route rather than bonding a 3rd upstream channel
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)?

qasdfdsaq 01-03-2014 21:08
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...

craigj2k12 03-03-2014 00:14
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by qasdfdsaq (Post 35676915)
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
Corrections added

Gstevie 03-03-2014 11:23
Re: Uddingston ML5 2 Upstream Channels
 
Got mine today! :-D

https://www.cableforum.co.uk/images/...2014/03/67.png

---------- Post added at 11:23 ---------- Previous post was at 11:17 ----------

My connection is still on 16QAM on 2 upstream channels too.

https://www.cableforum.co.uk/images/...2014/03/57.jpg https://www.cableforum.co.uk/images/...2014/03/58.jpg https://www.cableforum.co.uk/images/...2014/03/59.jpg

Ignitionnet 06-03-2014 17:24
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by General Maximus (Post 35676373)
Interesting that they have decided to go down the 64qam route rather than bonding a 3rd upstream channel
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.

General Maximus 06-03-2014 18:02
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.

Ignitionnet 06-03-2014 18:19
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by General Maximus (Post 35678314)
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.
*Whistles innocently*

WiFi is rubbish for downloads, but...

https://www.cableforum.co.uk/images/...2014/03/53.png

Martin_D 06-03-2014 18:23
Re: Uddingston ML5 2 Upstream Channels
 
My ac router is in now just need to upgrade my pc to usb 3.0

Attachment 25266

qasdfdsaq 06-03-2014 18:32
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by Ignitionnet (Post 35678317)
*Whistles innocently*

WiFi is rubbish for downloads, but...

https://www.cableforum.co.uk/images/...2014/03/53.png
Pah, my best result on WiFi:

http://www.speedtest.net/my-result/1757714849

Jumping 06-03-2014 18:43
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by Martin Dee 11 (Post 35678321)
My ac router is in now just need to upgrade my pc to usb 3.0

Attachment 25266
Nice is it much better different to the 66u?

Martin_D 07-03-2014 12:38
Re: Uddingston ML5 2 Upstream Channels
 
High Utilisation For Me :(

F002847996 No Fix date yet

Attachment 25271

Ignitionnet 07-03-2014 12:47
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!

Martin_D 07-03-2014 12:57
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by Ignitionnet (Post 35678472)
Those all seem fine, I guess it needs the more granular hourly graphs to show. Evidently not that bad!
Fix time is currently set at: 12th March 15.00


Attachment 25273

Top speed

https://www.cableforum.co.uk/images/...2014/03/47.png

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

Gstevie 07-03-2014 13:28
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?

Martin_D 07-03-2014 13:33
Re: Uddingston ML5 2 Upstream Channels
 
Quote:
Originally Posted by Gstevie (Post 35678488)
Martin Dee, are you aware if they are looking for people on the Samknows trial just now? Or is it all full up?
It can take a couple of months for them to get back to you

https://www.samknows.eu/sign-up/


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