QLN and HLog question
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- Re: QLN and HLog question
QLN and HLog question
16-12-2017 11:04 AM
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The values are always expressed as -n dB. Which is the better -n, please, larger or smaller?
Re: QLN and HLog question
16-12-2017 11:24 AM
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HLog: more signal is better, so -20 dB is better than -30 dB.
QLN: less noise is better, so -140 dBm/Hz is better than -120 dBm/Hz.
(the unit for QLN is dBm/Hz)
Re: QLN and HLog question
16-12-2017 1:16 PM
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@ejs Thanks for that!
The downstream QLN from tones 33 to 511 seems to have deteriorated by arithmetical average of -.588 dBm/Hz. I'm not sure if that is a valid way to calculate. Secondly my connection does not use higher than, say, tone 320, so are the higher ones still of relevance?
Re: QLN and HLog question
16-12-2017 2:21 PM
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And what is 0.588 dBm/Hz in context? Less than 1%? QLN is only measured when the modem is establishing a connection, I'd expect it to vary by more than 1% from one time to another.
My line's about 10% slower than what it was 2 years ago.
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