Improve my modem stats???

J0NO · 13-05-2007, 11:05

I know this may be a long shot, but is there anything i can do on my end that will improve my connection stats.

Downstream Receive Power Level : 2.1 dBmV
Downstream SNR : 35.0 dB
Upstream transmit Power Level : 52 dBmV

its the Upstream power level that concerns me (i know its within range for my VM 255.

I've one of these on the wall -

and this is my splitter -

anything i can replace remove or add at my end to improve the signal??

any advice is appreciated, cheers

r00t · 13-05-2007, 11:17

There is nothing wrong with the stats you have posted.

Halcyon · 13-05-2007, 11:22

It could be slightly better, but not much.
See here for ideal stats:

http://www.cableforum.co.uk/board/12...al-levels.html

zonerc · 13-05-2007, 11:40

Downstream Lock : LockedDownstream Channel Id : 1Downstream Frequency : 586750000 HzDownstream Modulation : QAM64Downstream Symbol Rate : 6952 Ksym/secDownstream Interleave Depth : taps12Increment17Downstream Receive Power Level : -13.1 dBmV

can anyone tell me if this looks right or not ive been having bad download speeds for well over a week now and should get an engineer out tomorrow

Downstream SNR :

---------- Post added at 12:40 ---------- Previous post was at 12:39 ----------

sorry didnt past all

Downstream Lock : LockedDownstream Channel Id : 1Downstream Frequency : 586750000 HzDownstream Modulation : QAM64Downstream Symbol Rate : 6952 Ksym/secDownstream Interleave Depth : taps12Increment17Downstream Receive Power Level : -13.1 dBmVDownstream SNR : 30.4 dB

r00t · 13-05-2007, 12:05

Downstream Receive Power Level : -13.1 dBmV

Yeah, call someone!

Paul · 13-05-2007, 12:12

Call Vm, I doubt if anything you do will sort the problem properly, get a tech out to deal with the levels if they find an issue with them.

zonerc · 13-05-2007, 12:26

sorry i mis-typed i have got an engineer comming out between 12 and 6 tomorrow was just wanting to know what you thought of the readings ,thought the -13.1 didnt look right but then i dont know much about modem readings lol.
thanks for the replys

J0NO · 13-05-2007, 13:00

**noobie question alert** but what does the fm tv/data isolator do and is it needed?

Halcyon · 13-05-2007, 13:09

TV/Data is for connecting to a Set top box or cable modem.

FM is to hook up to a radio's aerial socket.

J0NO · 13-05-2007, 13:33

so is it just a splitter and can it be removed to reduce signal loss?

taylorig · 13-05-2007, 13:57

The TV/FM isolator is out of date now. When i used to work for Telewest 3 years ago we always took them out. The FM part isn't even used anymore.

Really you need to get that replaced. But you will probably get the engineer saying it's fine (Anything for an easy life

)

But on the other hand you need a isolator to stop spikes and such either coming in to your equipment or any going out to the network from yours. So don't remove it.

Ideally you'd need a terminator to put on that FM output to stop the loss of signal.

And as everyone else as said the Downstream Receive Power Level : -13.1 is way to low.

J0NO · 13-05-2007, 23:05

do you know what isolators ntl/virgin are fitting in new installs to replace the old fm - tv/data ones?

**Graham M** · 13-05-2007, 23:19

Hmm J0NO do I know you from somewhere?

I know

J0NO · 13-05-2007, 23:27

you'll have to refresh my memory Zeph sorry, but maybe here isnt the best of places lol.

Back on topic what isolators do newer installs have?

taylorig · 14-05-2007, 15:04

The isolators being fitted now have just a single output on them. No real difference apart from the FM output missing. Like i said before if you do have the FM/TV type the FM output should have a terminator on it to stop interference getting in and/or signal loss. Thats all. Usually you don't notice anything. But in rare cases i have found signal loss due to it.

But in your case were as your getting the -13db downstream power level. That is either your cablings damaged or more likely to be the tap in the DP or your not in a high enough tap in the DP. But you can have to much power to your equipment which would cause the same symptoms. A lot of people still think of it in the way of the more power the better. The key is to get a balance.

Edit: Sorry it's zonerc with the -13 power level. Misread the posts. But anyway this should give most of you an idea of how things should be