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Author Topic: SNR Margin  (Read 1079 times)

noddy

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SNR Margin
« on: April 06, 2018, 06:59:48 AM »

Hi I'm a little confused as to the true SNR Margin , I have one pc connected by ethernet which I run DSLstats from average SNR is 6.1 on a steady day . Now if I run it from my laptop with the pc off but still connected to the ethernet cable it's still 6.1 but if I unplug the cable SNR drops to 5.1 ? Cheers
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roseway

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Re: SNR Margin
« Reply #1 on: April 06, 2018, 07:40:56 AM »

DSLstats reports what the modem tells it, so it appears that unplugging the ethernet cable to the PC causes some local interference to be generated, resulting in a 1 dB drop in the SNRM. All the values reported should be 'true' at the time they're reported.

I guess this is something to do with how the equipment is interconnected and which parts are earthed (the desktop PC should be).
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  Eric

noddy

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Re: SNR Margin
« Reply #2 on: April 06, 2018, 08:20:17 AM »

I'll have investigate may be plug the laptop in with the same cable see it it has the same affect . Cheers
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NewtronStar

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Re: SNR Margin
« Reply #3 on: April 06, 2018, 07:15:10 PM »

I have noticed with these all in one units Billion 8800NL and Zyxel 8924 any device which LAN socket is connected close to the DSL Port for example PORT 1 or 2 would decrease the SNRm by 0.5dB, So for best results I use the ports further away 3 and 4 and zero decrease of SNRm when devices are on or off.

Just something you could easily try.
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noddy

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Re: SNR Margin
« Reply #4 on: April 06, 2018, 08:04:49 PM »

Cheers worth a shot :)
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