Upstream Power Level too high?

Just over a week ago my SACM (ntl:home 120) started to play up. It would randomly start flashing the SYNC & RDY lights & I would lose connection. While it was working, I looked at the config page & saw that the upstream power level was at it's maximum (61dBmV).

I phoned TS yesterday & had a visit this morning. The Tech connected his meter to the line & clicked on some buttons (I assume he was scrolling through the levels etc.). He said the levels need adjusting & went out to the green box.

After using his meter again, he said that it was ok, but looking at the config page, I am still getting an upstream power level of 61dBmV. The only thing that has changed is the downstream power level. It was around -7dBmV, & it is now around -5.3dBmV.

I cant see my connection being stable while it is operating at these levels.

[Wicked_and_Crazy]

i thought the upsteam should be below 55

see here

http://www.cableforum.co.uk/board/sh...66&postcount=1

[BBKing]

61 is a problem because a) it's 3 over the supposed DOCSIS maximum and b) it can't go any higher, even on Ambits which are a bit loose about the spec. Hence any transitory need to go higher to retain connection cannot be met, resulting in instability. However it can be perfectly stable *at* 61.

Yep. That's why I'm concerned that it is still 61dBmV.

I noticed that it was more likely to lose connection during cold weather. So I suppose I will have to see what happens tonight.

Perhaps the fault is with the modem & not the connection & that's why it didn't show up on the meter?

Out of interest, do those meters only check the line signals, or can they check the modem as well? I noticed that the tech also had a short F to F lead with him (for checking the modem perhaps?).

Originally Posted by XFS03

...I am still getting an upstream power level of 61dBmV...

...I cant see my connection being stable while it is operating at these levels....

Well, I was right. For the past week I have still been getting intermittent connection.

Had another Tech visit today. This time I left the modem configuration page open on the pc so that he could see the levels. Straight away he said the upstream power level was too high. After spending 10 - 15 mins at the green box, he said that a network engineer needs to be called out. He suspects that there may be a problem with one of the amplifiers, either in my local green box, or a nearby one.

He said it should be done today.

Modem reset itself at around 3.45pm.

When I checked the levels, the upstream was 43dBmV.

They did what they promised.

[bdav]

NTL are v. lucky to have a backup support team!