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Sephiroth · 03-06-2010, 19:07

If you're 256QAM, 35 dB is only OK-ish especially if you were on 37 before. So they screwed up the repull at a connexion somewhere!

By way of explanation, the lower threshold for 256QAM is 30 dB; then minimum headroom needed for all circumstances is +3dB; then network pros like to see another 3 dB for thermal variations and so on. So I always say above 35 dB is best. Others, I'm sure, will disagree with my caution.

I'll try the router again this weekend - the boy's away and he doesn't need the O2 line!

03-06-2010, 19:07	#186
Sephiroth Wisdom & truth Join Date: Jul 2009 Location: RG41 Services: RG41: 1Gig VOLT Rutland: Gigaclear 400/400 Posts: 12,555	Re: Why I regret joining virgin media If you're 256QAM, 35 dB is only OK-ish especially if you were on 37 before. So they screwed up the repull at a connexion somewhere! By way of explanation, the lower threshold for 256QAM is 30 dB; then minimum headroom needed for all circumstances is +3dB; then network pros like to see another 3 dB for thermal variations and so on. So I always say above 35 dB is best. Others, I'm sure, will disagree with my caution. I'll try the router again this weekend - the boy's away and he doesn't need the O2 line! __________________ *Seph.* My advice is at your risk.