General Forum

Re: Beovision 1 LS, Humax Fox T2 HD, Digital to Analogue Picture Noise

beping7 — Fri, 08 Jul 2011 10:27:01 GMT

Yes, a cheap SCART is in use

I tuned the tv to a spare channel with no reception. This eliminated the 'lines' problem but the picture was a little snowy.

Then SCART wire 19 was snipped and that's worked. The signal/picture is now much improved.

Thanks for the good advice langleyav & tournedos.

Re: Beovision 1 LS, Humax Fox T2 HD, Digital to Analogue Picture Noise

langleyav — Fri, 08 Jul 2011 08:04:53 GMT

This sounds very much like you are using a cheaper scart lead that only has an overall screen and not individual screens on the video leads.

When you switch to scart input, there is still an off air signal going out of the scart socket for recording purposes. If there is only an overall screening on the cable, then the video information going out of the scart socket interacts with the video signal coming into the scart socket.

Try selecting an unused UHF TV channel before selecting the scart input to see if the problem still exists.

Ron

Re: Beovision 1 LS, Humax Fox T2 HD, Digital to Analogue Picture Noise

tournedos — Fri, 08 Jul 2011 08:04:09 GMT

This is typically due to video crosstalk in your SCART table. While you watch a SCART input, the same interface in the TV still outputs the programme from the analogue tuner or some other source. It then bleeds over to the picture you are actually watching.

Your options:

get a better quality, well shielded SCART cable (easier said than done)
tune the TV to some analogue channel that doesn't transmit anything before switching to the SCART input - the "snowy" picture will still bleed over in the cable, but is usually very difficult to notice
snip the wire from pin 19 in the SCART connector at the TV end of the cable. This will disable the bleeding signal from the cable (and mark the cable, as it won't work in the other direction anymore, and will drive you nuts searching for the problem some time later!)

Beovision 1 LS, Humax Fox T2 HD, Digital to Analogue Picture Noise

beping7 — Fri, 08 Jul 2011 06:10:24 GMT

I watch freeview TV, have had multiple freeview boxes with different CRT TV's and all produced screen noise in the form of thin lines floating across the screen usually from right to left, on all channels.

Now with the B&O + Humax (recommended by B&O), the general SD picture is great but screen noise is much more obvious than all the cheaper freeview boxes I've used, with clear numbers as well as thin lines scrolling. Is this a problem with converting a terrestrial digital broadcast signal to analogue, sending it through a SCART cable to an analogue TV ?

Has anyone had similar issues with digital to analogue conversion ? Is there any way to get rid of the digital artefacts ? I love the Beovision 1 so won't be changing anytime soon.