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Scuttle
Newbie
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Message 1 of 7

Noise difference upload download

Hi

 

Can someone shed some light please.

 

The noise level on the upload is consistent at 6 – 7 dB and the noise level on the download is consistent at 7 – 13 dB.

 

Why is there such a difference between upload and download noise when the signal is carried on the same 2 cables?

 

Thanks

 

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6 REPLIES 6
Distinguished Sage
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Message 2 of 7

Re: Noise difference upload download

They use different frequencies, the upload using less of the available spectrum
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Scuttle
Newbie
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Message 3 of 7

Re: Noise difference upload download

So why does that lead to such high download noise levels compared to the upload noise levels?
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Distinguished Sage
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Message 4 of 7

Re: Noise difference upload download

You're looking at the noise margin. It's not a level of noise, it's a buffer zone if you will. It offers that level of protection against any external source of noise such as electronic interference. In essence, the higher the better for the stability of the line.

What are your connection speeds?
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Scuttle
Newbie
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Message 5 of 7

Re: Noise difference upload download

 

I'm near the limit as far as distance goes at about 3.3km from the cabinet. Over the last year this is what I've had.

 

 

BT data.jpg

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Scuttle
Newbie
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Message 6 of 7

Re: Noise difference upload download

Sorry, you'll need to zoom in on that.

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Scuttle
Newbie
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Message 7 of 7

Re: Noise difference upload download

Easier to see on a graph

 

Clip_2.jpg

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