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Monkfish · 16-04-2005, 17:51

I just put a scope between my PC ground line (case) and the screen of the NTL cable (disconnected), and it shows a 50Hz 4V p-p noisy signal with 2V spikes. I didn't measure the signal power (source impedance) but would guess it was higher than for simple cross-talk pickup. In fact even just connecting the negative lead of my scope to the NTL screen was enough to produce the buzzing on my powered speakers, and that was with the PC and modem turned off!

16-04-2005, 17:51	#8
Monkfish Inactive Join Date: Dec 2004 Posts: 25	Re: Noise down cable screen! I just put a scope between my PC ground line (case) and the screen of the NTL cable (disconnected), and it shows a 50Hz 4V p-p noisy signal with 2V spikes. I didn't measure the signal power (source impedance) but would guess it was higher than for simple cross-talk pickup. In fact even just connecting the negative lead of my scope to the NTL screen was enough to produce the buzzing on my powered speakers, and that was with the PC and modem turned off!