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Author Topic: Why do I have such a large dip in bit loading  (Read 1712 times)

Oldjim

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Why do I have such a large dip in bit loading
« on: July 24, 2015, 05:03:28 PM »
This surprised me as I would have expected that the lower frequencies would be less affected by distance
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Jim
Plusnet

Black Sheep

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Re: Why do I have such a large dip in bit loading
« Reply #1 on: July 24, 2015, 05:50:15 PM »
I'm sure some of the boffins will be along to tell you (in far better way than I), that it's probably power-shaping/power cut-back.
To stop the lower VDSL tones from interfering with ADSL tones.
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Bald_Eagle1

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Re: Why do I have such a large dip in bit loading
« Reply #2 on: July 24, 2015, 06:05:59 PM »
Yes. That's about the gist of it.

Graphs from my own poorer connection are attached for comparison purposes.

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ardsar

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Re: Why do I have such a large dip in bit loading
« Reply #3 on: July 24, 2015, 09:30:18 PM »
Was going to ask the same question and found this thread. I have attached mine, and as can be seen I have very liitle between tones 300 - 500!

HLOG and QLN seem ok?

THanks
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