Getting minus errors
 

I'm 95% sure it shouldn't be going backwards

https://www.cableforum.co.uk/images/local/2016/01/6.jpg

Re: Getting minus errors
 

I'm pretty sure that if there are no issues with your connection or speed, then I think the negative values are nothing to worry about. Someone else may be able to clarify this better than I have.

Re: Getting minus errors
 

Well about 5 minuets after this the amount of errors went into the millions the connection reset 5-6 times then came back but the upstream was down for about 6 hours before reconnecting

Re: Getting minus errors
 

Roll over of an "int" data-type? The coder probably never contemplated pre and post RS errors in the 100,000's

Re: Getting minus errors
 

Even resting the counters just makes it go to -1

Re: Getting minus errors
 

Remember this information is aimed at a "professional" not the customer and you don't want to waste valuable memory for no reason.

The going to -1 immediately on resetting may be interesting but probably not.

Re: Getting minus errors
 

Its been all over the damn place since last night with it dropping 5 times over the course of 10 minuets then the connection just randomly dropping to sub 100kbs a second then coming back and now the errors are just going backwards and going into the millions randomly, i'm completely clueless as to what is happening

Re: Getting minus errors
 

What do VM say? I would phone

Re: Getting minus errors
 

I'm jinxing it by saying this but its been fine for a bit now

Re: Getting minus errors
 

Looks like a signed int16

Re: Getting minus errors
 

Re: Getting minus errors
 

A feature, eh - Muddie!

Maybe a 10dB forward Path Attenuator would annul the post-RS errors.

Re: Getting minus errors
 

The -ve sign on the RS errors, yes a feature of the calculation method.

No, won't have any affect. Maybe add a bit of noise if it's a dodgy FPA.

Re: Getting minus errors
 

It's popcorn time, Muddie!

When an integer goes negative, it's because of the integer type when the value overflows. Is that what you mean by a "feature"? i.e. a nice piece of sarcasm? In which case I've been a bit of a thicko!

Thge power level on this cheap equipment is very close to maximum in range value that VM recommend. So there could well be something overdriven which might account for the errors.

Re: Getting minus errors
 

The power levels only started getting this high when it was getting really cold outside otherwise it was normally 7-8

https://www.cableforum.co.uk/images/local/2016/01/3.jpg

Re: Getting minus errors
 

Re: Getting minus errors
 

Yes, that's correct.

In the particular case, I see little difference between 9.9 and 10.1, the latter being one where the technician should fit an attenuator according to the Field Service Guide. An the SH range is cheap kit. So I'm suggesting that to remove that element of doubt an attenuator should be fitted.

That said, I notice that the post-RS errors are zero on the latest shown data.

Btw, it is always a good idea to post the Upstream data at the same time because if it's behaving correctly, that power should be lower than "normal".

Re: Getting minus errors
 

https://www.cableforum.co.uk/images/local/2016/01/2.jpg

Here you go, speaking of which its gotten real cold here it was -7c last night if i remember correctly

Re: Getting minus errors
 

Thanks. Well it does appear to be behaving correctly now. The upstream shows completely normal.

Thinking about it, the post-RS registers don't tell you WHEN the climb in numbers occurred. Say it went down for an hour to -10C and power downstream rose even further such that the errors occurred, you'd be tempted to think you have a problem.

In any case I would fit one of the Forward Path Attenuators I always happen to have.

Re: Getting minus errors
 

I really need to get one sounds pretty handy to have

Re: Getting minus errors
 

http://www.ebay.co.uk/sch/i.html?_od...uator&_sacat=0

8dB or 6dB would also do the business.

Re: Getting minus errors
 

Huh those are a lot more cheap then i was expecting thanks for the link i will defiantly buy one

Re: Getting minus errors
 

https://www.cableforum.co.uk/images/local/2016/01/1.jpg

Almost at 10 now oh boy

Re: Getting minus errors
 

My levels go up and down! :erm: ... just bunged a 6db FPA on and left em around 5! :)

I get - errors aswell .... The superhub2ac is abit weird like that but I still get 200mbps 24/7 :cool:

Re: Getting minus errors
 

What does that mean "my levels go up & down"? Which levels, exactly? And by what sort of number change?

Re: Getting minus errors
 

My Downloads were originally on about 5 (without the 6db FPA attached) then shot upto 11 about a month ago... being going up & down slightly ever since!... :)

My upload power has been about 30 for years! :)

Re: Getting minus errors
 

The "slightly" is totally normal. By that I mean e.g. 5.5 to 5.6 or 5.7 or 5.4.