Downstream levels/signal

[CJ1988]

Hello everyone i have a few channels where the signal fluctuates, i've read a few posts that it could be the downstream levels causing the signal issues. Could anyone have a look to see if there ok thanks.

 

[Adz786]

Hello everyone i have a few channels where the signal fluctuates, i've read a few posts that it could be the downstream levels causing the signal issues. Could anyone have a look to see if there ok thanks.View attachment 27431 View attachment 27433 View attachment 27434

Hi mate..

Im no expert but ive had power level issues. Had to ring vm who advised its a problem in the area due to a upgrade on cabinet..

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[CJ1988]

A

Hi mate..

Im no expert but ive had power level issues. Had to ring vm who advised its a problem in the area due to a upgrade on cabinet..

Sent from my HTC 10 using Tapatalk

Alright bud do u know what the downstream levels range should be.

 

[Adz786]

A


Alright bud do u know what the downstream levels range should be.

Not sure mate but the tk vets helped me out

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[neo1977]

+10 and -6 Downstream should be in the range so signal level is a bit high and requires it to be moved down in the catv cabinet. Always looking for it to be close to 0 as possible. SNR should be greater than 34.

 

[CJ1988]

+10 and -6 Downstream should be in the range so signal level is a bit high and requires it to be moved down in the catv cabinet. Always looking for it to be close to 0 as possible. SNR should be greater than 34.

Is it best to contact vm, get them to sort it.

 

[ste]

An attenuator would bring your levels down.

 

[CJ1988]

An attenuator would bring your levels down.

I've connected a 3db forward path attenuator to the back of the router, it seems to have lowered the levels down abit, do u think I should try a higher attenuator cheers.


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[ste]

As long as it's within range of between -6 and +10 it should be fine.

 

[CJ1988]

As long as it's within range of between -6 and +10 it should be fine.

What db attenuator would u go for though bud if I was to lower the downstream levels in the pictures.

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[neo1977]

Is it best to contact vm, get them to sort it.

yeah as ste says aslong as its within range its fine, any other problems then call vm

 

[neo1977]

6db or 10db i would use

 

[CJ1988]

6db or 10db i would use

Cheers

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[Adz786]

Cheers

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I called vm now and they did something over the phone.im finally glitch and judder free for nw..

They said they will monitor my line shall i disconnect my box??

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[dappa2]

after reading this topic I thought I'd look at mine

DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 194750000 Hz 138750000 Hz 146750000 Hz 154750000 Hz 162750000 Hz 170750000 Hz 178750000 Hz 186750000 Hz
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 8 1 2 3 4 5 6 7
Modulation QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256
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) -10.2 dBmV -10.5 dBmV -10.5 dBmV -10.7 dBmV -11.2 dBmV -9.5 dBmV -9.6 dBmV -9.9 dBmV
RxMER (dB) 38.8 dB 38.6 dB 38.8 dB 38.8 dB 38.6 dB 38.9 dB 39.0 dB 39.0 dB

from the above is that saying minus 10 average for everything and too low?

 

[pabloescaban]

after reading this topic I thought I'd look at mine

DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 194750000 Hz 138750000 Hz 146750000 Hz 154750000 Hz 162750000 Hz 170750000 Hz 178750000 Hz 186750000 Hz
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 8 1 2 3 4 5 6 7
Modulation QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256
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) -10.2 dBmV -10.5 dBmV -10.5 dBmV -10.7 dBmV -11.2 dBmV -9.5 dBmV -9.6 dBmV -9.9 dBmV
RxMER (dB) 38.8 dB 38.6 dB 38.8 dB 38.8 dB 38.6 dB 38.9 dB 39.0 dB 39.0 dB

from the above is that saying minus 10 average for everything and too low?

yes it's miles out, -6 is the bare minimum, you need an engineer visit

 

[dappa2]

at least I know the issue thats been bugging my cable use since april this year, majority of the time the channels are ok but you get the odd day where its crap and judders all over the place.

As I'm a virgin broadband only customer can power level affect that too as I cant really ring them up and complain about the tv being juddery, or should I just say to them that the power levels on my router are not up to spec and just leave it like that?

 

[Adz786]

at least I know the issue thats been bugging my cable use since april this year, majority of the time the channels are ok but you get the odd day where its crap and judders all over the place.

As I'm a virgin broadband only customer can power level affect that too as I cant really ring them up and complain about the tv being juddery, or should I just say to them that the power levels on my router are not up to spec and just leave it like that?

I had exact same issue..i only have broadband with them..

I called and said my speed is slow, i get dropped connections and even youtube is extremely lagging..

I said i look at technical forums and i think its something to do with power levels but not sure...

P.s disconnect your box when they ring...

The advisor said there was a signal fault in my area and engineers will fix it by 24th nov..24th went passed and i still had the extreme judder..

I called yesterday abit more angry and somehow by magic the advisor did some tests and did something to my line and bravo perfecy today not a glitch at all..they booked an emgineer visit for ne t saturday but i might cancel as all looks well for now...

Do what i did and fingers crossed...

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[dappa2]

I was gonna ring virgin but just unplugged the box and splitter and just plugged the original virgin white cable back into the box and the power levels are no longer -11 they are all between like -4 and -6, does that indicate something else is wrong perhaps or my cable is shite?

 

[Adz786]

I was gonna ring virgin but just unplugged the box and splitter and just plugged the original virgin white cable back into the box and the power levels are no longer -11 they are all between like -4 and -6, does that indicate something else is wrong perhaps or my cable is shite?

Im not sure now lol..it could be your equipmemt such as splitters and the type of cable you use..but i cant guarantee..

I would say still call them and see if there is an issue..no harm in calling

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