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-   -   General : 4 upstream channel bonding - post here (https://www.cableforum.uk/board/showthread.php?t=33705315)

Synthetic 06-06-2019 12:25
Re: 4 upstream channel bonding - post here
 
Quote:
Originally Posted by Sephiroth (Post 35998158)
By moving from 16QAM to 64QAM, the packing density on the upstream has increased by 50%. That means they've cured the noise problems.
Makes sense, taken them long enough i've been on 16qam upstreams since I moved here 2.5 years ago

thedotlair 07-06-2019 19:48
Re: 4 upstream channel bonding - post here
 
Reigate (RH2) has been upgraded to four channels at 64QAM - was only 2 for quite a while

https://imgur.com/UfOXpcN

Synthetic 31-07-2019 10:48
Re: 4 upstream channel bonding - post here
 
After a 4 hour outage yesterday, some work has been done and my area (Gateshead) now appears to have at least 12 channels available and none are 25MHz.

https://www.cableforum.uk/images/local/2019/07/6.png

I also now hit 36Meg up at all times of the day (woohoo)

Nothing else appears to have changed downstream wise.

Sephiroth 31-07-2019 18:40
Re: 4 upstream channel bonding - post here
 
Ignition said somewhere that they'd be doing away with 25MHz upstream.

Synthetic 01-08-2019 15:13
Re: 4 upstream channel bonding - post here
 
Yep I remember reading that, well it's happened :)

chambohambo 25-08-2019 16:15
Re: 4 upstream channel bonding - post here
 
Still on 16QAM here in Preston, Lancashire.

spankysmagicpian 26-08-2019 19:48
Re: 4 upstream channel bonding - post here
 
2 Attachment(s)
Baguley / M32

I'm supposedly on M500 and it's worse than M350 I had last week before they swapped it over :-(

General Maximus 26-08-2019 20:39
Re: 4 upstream channel bonding - post here
 
why have you posted your upstream power levels? You are getting full speed on the upstream.

spankysmagicpian 26-08-2019 22:29
Re: 4 upstream channel bonding - post here
 
3 Attachment(s)
Quote:
Originally Posted by General Maximus (Post 36007627)
why have you posted your upstream power levels? You are getting full speed on the upstream.
Because :
  1. Synthetic posted his
  2. I'm an idiot?

SnoopZ 12-10-2019 13:07
Re: 4 upstream channel bonding - post here
 
Quote:
Originally Posted by SnoopZ (Post 35998162)
Now the frequencies have changed again, is it normal for them to move about?

1 25800050 3.975 5120 64 qam 4
2 39399885 4.025 5120 64 qam 2
3 46199975 4.025 5120 64 qam 1
4 32600000 4.025 5120 64 qam 3
I've now dropped to 4x 32qam not sure what this means but i know 4x64 is better.

General Maximus 12-10-2019 14:29
Re: 4 upstream channel bonding - post here
 
It means that there is sufficient noise on the network that it cannot sustain qam64 and has had to drop to qam32. Without looking up the exacts stats you are probably looking at something like a 12.5% drop in throughput so if for example the 4 bonded channels had a maximum throughput of 200mbits, that has now been reduced to 175mbits. Not the end if the world.

Sephiroth 12-10-2019 18:01
Re: 4 upstream channel bonding - post here
 
Quote:
Originally Posted by SnoopZ (Post 36013642)
I've now dropped to 4x 32qam not sure what this means but i know 4x64 is better.

Now the frequencies have changed again, is it normal for them to move about?

1 25800050 3.975 5120 64 qam 4
2 39399885 4.025 5120 64 qam 2
3 46199975 4.025 5120 64 qam 1
4 32600000 4.025 5120 64 qam 3
I missed in in your earlier posts.

Your frequencies are off-centre apart from channel 4.
They should not micro-change. This wobble will distort your signal.

You should check with your neighbours that they have the same problem. The resolution can lie in the filters of your nearest cabinet or other cabinets in the cascade - or at the CMTS end (less likely).

Hope that helps.

SnoopZ 12-10-2019 20:26
Re: 4 upstream channel bonding - post here
 
Quote:
Originally Posted by Sephiroth (Post 36013659)
I missed in in your earlier posts.

Your frequencies are off-centre apart from channel 4.
They should not micro-change. This wobble will distort your signal.

You should check with your neighbours that they have the same problem. The resolution can lie in the filters of your nearest cabinet or other cabinets in the cascade - or at the CMTS end (less likely).

Hope that helps.
This is what i have now, i am not that concerned as i can still get my full 220/20 what i am paying for.

1 25799996 3.95 5120 32 qam 4
2 46200068 4.025 5120 32 qam 1
3 39400025 4.025 5120 32 qam 2
4 32599939 4.025 5120 32 qam 3

Sephiroth 12-10-2019 20:36
Re: 4 upstream channel bonding - post here
 
You should be concerned imo. I would report that as a fault and it doesn't self-correct.

SnoopZ 12-10-2019 23:17
Re: 4 upstream channel bonding - post here
 
Quote:
Originally Posted by Sephiroth (Post 36013674)
You should be concerned imo. I would report that as a fault and it doesn't self-correct.
So anyone that doesnt have 00000 at the end of their frequencies have a fault? As there are alot of people in this thread like that so it must be common?


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