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Deanozz
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Low downstream power to router

Downstream power at -0.4

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StormW4tch3r
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Re: Low downstream power to router

That's fine "normal range" is -6 +10

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Deanozz
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Re: Low downstream power to router

Even for gaming? I was told i need around +1-4

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cje85
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Re: Low downstream power to router

-6 to +10 is the range for a stable connection, with 0 being ideal, so -0.4 is very close to perfect. There's no specific requirement for gaming

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Deanozz
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Re: Low downstream power to router

Ok.I have problems with gaming that i never used to get when i was with BT including laggy connections which i should not be getting with the 350 vivid package and weapons not firing properly. Never had that problem until i went with virgin.Now a friend of mine had the same problem and spent a year and half trying to get it sorted and it turned the downstream power was too low.Virgin sorted this and now there gaming is near perfect.can you please explain this?

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Superuser
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Re: Low downstream power to router

Power levels are not an absolute scale.  They're actually based on a logarithmic scale where power is referenced against an ideal value.

There's actually a discussion of power levels here:
http://www.dslreports.com/forum/r13366169-What-is-diff-w-dB-and-dBmV-power-level

They link to a page explaining logarithmic scales - which has this quote:

If the output power level is 0 dB, that is 100%, the level of −3 dB
is equivalent to 50%
 and −6 dB is equivalent to 25% of the initial
output power.
This applies to all energy quantities; e.g. sound intensity. 

Virgin Media quote the ideal power level range for their connections as being -6 to +10dBmV so -0.4dBmV is not a bad signal level

Upstream power works differently as the aim is that by the time the signal gets to the CMTS it's power level falls within an acceptable range by the time it gets there - allowing for attenuation as it traverses the network.  So upstream values actually end up appearing higher, although there is an upper transmit level of around 55dBmV

If you want your connection checking it's best to actually post all your levels:

  1. Go to 192.168.0.1 - Don't log in
  2. Click Router Status
  3. Post the info from the following tabs
    • Downstream
    • Upstream
    • Network Status

That will enable us to see if anything leaps out at us as downstream power levels alone don't tell you much.

Tim

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