Broadband Related > Broadband Technology
SNR/Tone
Westie:
For some time I have noticed a sawtooth pattern on my SNR/Tone graph. At first I thought it might be due to interference from a DECT phone, but unplugging the phone and connecting the modem/router to the master socket eliminated that as a source.
Then I compared the results with others on MDWS (which is now in its final few days), and it seems to me that everyone reporting from the UK that is on Vectored VDSL shows a similar pattern above a SNR of 40-45dB.
It would appear that Vectoring introduces the phenomenon. I have no idea why or how it happens, and I only mention it now out of interest.
konrado5:
Could you attach your SNR/tone ?
Westie:
--- Quote from: konrado5 on March 05, 2018, 02:44:36 PM ---Could you attach your SNR/tone ?
--- End quote ---
I think it's attached! :fingers:
Edit: changed attachment to more recent & better formatted version
konrado5:
Have you got vectoring on upstream? On upstream I don't notice sawtoogh pattern.
Westie:
Line stats Report Vectoring status as '1 (VECT_FULL)', or as '3 (VECT_RUNNING)', and seems to toggle between the two every few minutes.
It's not clear if it is applied only on the downstream or on both, but since the SNR on the upstream is below 40dB I wouldn't expect to see the pattern there anyway.
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