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Author Topic: Does crosstalk attenuate other noise?  (Read 225 times)

konrado5

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Does crosstalk attenuate other noise?
« on: June 27, 2018, 07:32:22 PM »

I've noitced that intermittent noise is more often in HAM band (tones 400-483) than in other bands. I know this is band for amateur radio however as I know nobody in Poland (all the more in my town) use this band for amateur radio.

Furthermore, at one time (at this time I had disabled HAM band) I heared buzzing on AM radio and I had reconnection. I've noticed that most increase on QLN graph is in the tones 400-483. It seems that my circuit is the most susceptible to any wideband noise on these frequiences. I would expect that circuit is the most susceptible to noise on the end ones (483-511) because as I know the higher frequency the worse longitudinal balance.

I suspect it is becasue I am only user on DSLAM with these frequiences unblocked and it results with no crosstalk on these frequiences. On the other frequiences crosstalk attenuates other type of noise. Is it possible?

Best regards
konrado5
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Weaver

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Re: Does crosstalk attenuate other noise?
« Reply #1 on: June 27, 2018, 08:29:05 PM »

I don't understand your use of the term ‘attenuate’.  ;D ‘Attenuation’ means multiplying by a positive number that is less than 1, so the value is reduced. It is not the same as obscuring or covering up something. As of course you know, crosstalk is always additive, that is it is a special type of noise that is strongly correlated with your own data signal or some other data signal.
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konrado5

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Re: Does crosstalk attenuate other noise?
« Reply #2 on: June 27, 2018, 08:30:08 PM »

I don't understand your use of the term ‘attenuate’.  ;D ‘Attenuation’ means multiplying by a positive number that is less than 1, so the value is reduced. It is not the same as obscuring or covering up something. As of course you know, crosstalk is always additive, that is it is a special type of noise that is strongly correlated with your own data signal or some other data signal.
I mean crosstalk reduce other noise.
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Weaver

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Re: Does crosstalk attenuate other noise?
« Reply #3 on: June 27, 2018, 10:07:07 PM »

Perhaps a problem, with English Konrado, my friend. :-) But crosstalk cannot reduce other noise. I would need you to explain - help me understand a bit. Your English is superb by the way. My Polish is a source of shame, given that it has now taken second place in ranking amongst the most commonly spoken languages of Scotland.
« Last Edit: June 27, 2018, 10:50:37 PM by Weaver »
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konrado5

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Re: Does crosstalk attenuate other noise?
« Reply #4 on: June 27, 2018, 10:40:26 PM »

Quote
`i would need you to explain - help me understand a bit.
I mean that if my router receive crosstallk then it receives fainter other noise than without crosstalk.
« Last Edit: June 27, 2018, 10:42:31 PM by konrado5 »
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Weaver

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Re: Does crosstalk attenuate other noise?
« Reply #5 on: June 27, 2018, 10:54:44 PM »

I would say that the level of other, non-crosstalk, noise received should be the same, be independent of whether you are getting crosstalk or not. What do you think?

I cannot think of a mechanism by which the two could be linked. Others may be able to think of something? Do you have something particular in mind?

 
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konrado5

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Re: Does crosstalk attenuate other noise?
« Reply #6 on: June 27, 2018, 11:13:55 PM »

I would say that the level of other, non-crosstalk, noise received should be the same, be independent of whether you are getting crosstalk or not. What do you think?
I also think that level of received non-crosstalk noise should be the same when router receive crosstalk. However I have observation indicating it is dependent on received crosstalk. I have described it in the first post of this thread.
« Last Edit: June 27, 2018, 11:22:37 PM by konrado5 »
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