[MUD_Wizard]

Originally Posted by vm_tech

Although the downstream SNR is on the low side, is it causing any problems?

While it's always a good idea to ask this question, if someone's RxMER is around 31 dB they'll be prone to several orders of magnitude more pre-rs errors and a much higher likelihood of post-rs errors, than someone at 35 dB.

If it's not causing problems it would be a miracle.

Originally Posted by vm_tech

I've never come across noise on the forward spectrum, although I'm told it is possible, mainly on analogue.

Really? Happens on-and-off for a few months of every year to most cable users, and that's at the fault level. Maybe you don't notice. If I wanted to be pedantic I could say there's always noise on the forward spectrum, that's what is described by the noise floor level.


---------- Post added at 01:36 ---------- Previous post was at 01:22 ----------

Originally Posted by qasdfdsaq

It displays received signal power and SNR. It doesn't display a figure for noise.

RxMER is the ratio of average signal constellation power to average constellation error power, in the receiver after demodulation. Not quite the same thing. An approximation of SNR yes, but RxMER does factor in impairments due to noise above the noise floor.


---------- Post added at 01:43 ---------- Previous post was at 01:36 ----------

Originally Posted by TROTER

Thanks to all for your information.

Unless you suspect the coax cabling in your home has been nobbled then I wouldn't stress about it (as annoying as these intermittent faults are). There's little you can do, apart from post a thread on the community forum or notify them by phone (as you have done). VM wait until enough customers complain before doing something and you calling up every day won't change that.

I generally post a thread, sit back and keep an eye on my Thinkbroadband graph, then switch to 3G phone whenever it drops out.

These things usually get resolved without further intervention in a few days to a couple of weeks.