Quote:
Originally Posted by STurtle
Yes, same configuration for me: Optical audio connection and Scart to Composite(RCA) from STB to the AV Receiver, but lots of noise. The receiver features a grounding, like yours. Now I even connected the analog audio RCA connections from the Scart too (needed for 2nd headphone pair, since it does not transform digital input to its 2nd analog audio out plugs), and still no noise!
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Is there noise on the digital channel with the RCA Stereo Jacks disconnected ?
Quote:
Originally Posted by STurtle
Yes, thanks for your input: I thought exactly like you did, when I took a look at the Scientific Atlanta 4200DVB and noticed that it only has a two-wire connection! Humming is usually caused by a bad ground, but to my surprise there was no ground at all! 
This then naturally led to my idea of "adding" a grounding, because what could be the harm if almost all other devices are grounded too? Of course, I first checked what would happen by measuring the difference in potential, rather than blindly adding a wire! |
I could appreciate you took care and had knowledge by the tone of your post. I thought I would emphasise the safety aspects as not everyone has the same respect for electricity ....................
Quote:
Originally Posted by STurtle
However, since I thus connected the "cable"-mass to my household grounding, I wonder whether this affects the "cable" part outside my house. Could it mess up my neighbour's TV reception? I have no idea about antenna/cable stuff and transmission of TV & Internet through a single coaxial cable - which is why I am asking for help here!
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I would
ASSUME 
that the cable distribution equipment isolates one feed from another.
Final diagnostic thoughts & suggestions;
1-Does your Optical lead have a sheath and metal connectors or is it a plastic cable. I have a Cambridge audio lead, which has metal connectors. Can you check that none of the connectors on your amp are touching each other.
2-Do you still have the sound problem if you disconnect the video lead and only connect the V+ digital signal ?
3-Can you try swapping to a different channel on the AMP DVD in perhaps just to try and isolate the amp from the equation....
4-Do you get the humming with any other external source DVD or games console perhaps ?
---------- Post added at 09:23 ---------- Previous post was at 09:17 ----------
Quote:
Originally Posted by neilboardman
I also have a problem with my cinema surrond sound kit, every time I connect my V+ to the subwoofer it sounds odd, my speakers are in the right place but it still sounds odd, I have tried every thing to sort it out, I have no opition but to use the optical port on the back of the V+ box but cant fix the problem, has anyone had the same problem and can offer some pointers to help me out?
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When you say odd what do you mean, echoes ? Only HD content will output Dolby Digital, most of the channels just put out PCM Stereo(I think). My Yamaha amp then defaults to the last used sound profile, I just default to stereo. If your amp is on a pseudo surround effect this can cause some odd effects.
Have you tried the BBC HD "Barker Reel" that is a good test for AV Setups. The test card even has specific 5.1 channels I think.