On 06/07/2010 15:48, Mark Carver wrote:
On 06/07/2010 15:21, Brian Mc wrote:
wrote:
: It depends, if the box output can be set as composite video (CBVS) then
: yes. However, some Freeview boxes etc. output RGB which will not be
: convertible by a VCR.

I would be extremely surprised if *ANY* Freeview box cannot be
switched to
CBVS on its SCART output! It is far more universal than RGB.

The Scart RGB interface actually relies on the CVBS signal to be
present, in order to provide the sync pulses. There are no 'syncs on
green'. However on Sky boxes the actual video signal on CVBS was (still
is ?) muted in RGB output mode.


I stand corrected! Sorry I was thinking of an experience I had trying to
get an old Pace analogue receiver to relay the SCART output from my
Freeview box to a TV with only a UHF socket. Turned out that the Pace
receiver just transferred the output to the appropriate SCART and
performed no modulation.

I have also had experience of TV's where the CVBS setting produced a
better picture than the RGB, in some extreme cases the RGB output
shifted the picture to the right.

"Clyde" wrote in message
news:S2JYn.221144$_m6.72678@hurricane...
On 06/07/2010 15:48, Mark Carver wrote:
On 06/07/2010 15:21, Brian Mc wrote:
wrote:
: It depends, if the box output can be set as composite video (CBVS)
then
: yes. However, some Freeview boxes etc. output RGB which will not be
: convertible by a VCR.

I would be extremely surprised if *ANY* Freeview box cannot be
switched to
CBVS on its SCART output! It is far more universal than RGB.

The Scart RGB interface actually relies on the CVBS signal to be
present, in order to provide the sync pulses. There are no 'syncs on
green'. However on Sky boxes the actual video signal on CVBS was (still
is ?) muted in RGB output mode.


I stand corrected! Sorry I was thinking of an experience I had trying to
get an old Pace analogue receiver to relay the SCART output from my
Freeview box to a TV with only a UHF socket. Turned out that the Pace
receiver just transferred the output to the appropriate SCART and
performed no modulation.

I have also had experience of TV's where the CVBS setting produced a
better picture than the RGB, in some extreme cases the RGB output shifted
the picture to the right.

All 3 of my PVRs give a better picture when set to CVBS than RGB - I thought
it should be the other way round but it isn't.

In article oyMYn.99763$vB5.75674@hurricane,
ian field wrote:
I have also had experience of TV's where the CVBS setting produced a
better picture than the RGB, in some extreme cases the RGB output
shifted the picture to the right.

All 3 of my PVRs give a better picture when set to CVBS than RGB - I
thought it should be the other way round but it isn't.

Sounds like you have a faulty TV.

--
*Ambition is a poor excuse for not having enough sense to be lazy *

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/07/2010 23:27, Dave Plowman (News) wrote:
In articleoyMYn.99763$vB5.75674@hurricane,
ian wrote:
I have also had experience of TV's where the CVBS setting produced a
better picture than the RGB, in some extreme cases the RGB output
shifted the picture to the right.

All 3 of my PVRs give a better picture when set to CVBS than RGB - I
thought it should be the other way round but it isn't.

Sounds like you have a faulty TV.

Well it's not mine, it was an old Sony.

When the Virgin Media chap installed my new STB he set the output to
CBVS, I have since changed it. I think the composite signal gives
slightly better contrast, but the picture seems to have better detail in
RGB.

Am currently saving up for an HD setup

"Mark Carver" wrote in message
...
On 06/07/2010 15:21, Brian Mc wrote:
wrote:
: It depends, if the box output can be set as composite video (CBVS) then
: yes. However, some Freeview boxes etc. output RGB which will not be
: convertible by a VCR.

I would be extremely surprised if *ANY* Freeview box cannot be switched to
CBVS on its SCART output! It is far more universal than RGB.

The Scart RGB interface actually relies on the CVBS signal to be present, in
order to provide the sync pulses. There are no 'syncs on green'. However on
Sky boxes the actual video signal on CVBS was (still is ?) muted in RGB output
mode.

I've never seen this on a Sky box - which make/model did you have?
I have a Vestel PVR which sometimes (randomly) drops PAL colour encoding from
its composite video output when set to RGB mode, but all the other SCART sources
I've tested (with the exception of Acorn RISC OS computers) provide colour
composite video as well as sync to the SCART connector alongside RGB, if the
latter is enabled.

jamie powell wrote:
"Mark Carver" wrote in message

The Scart RGB interface actually relies on the CVBS signal to be present, in
order to provide the sync pulses. There are no 'syncs on green'. However on
Sky boxes the actual video signal on CVBS was (still is ?) muted in RGB output
mode.

I've never seen this on a Sky box - which make/model did you have?

Pace 2200. However, thinking back, I think I'm 'arse about face' with this, it
might have been the RGB video was quenched whenever the 'tv' button on the Sky
box was pressed. ISTR it was introduced in a s/w update shortly after launch,
98/99 ish.

Googles

Ah, yes, further reading

http://www.digitalspy.co.uk/forums/s...d.php?t=152083




--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

In article zkPYn.44680$cJ6.5786@hurricane,
Clyde wrote:
Sounds like you have a faulty TV.

Well it's not mine, it was an old Sony.

When the Virgin Media chap installed my new STB he set the output to
CBVS, I have since changed it. I think the composite signal gives
slightly better contrast, but the picture seems to have better detail in
RGB.

There could well be a difference between the basic contrast etc settings.
But that could be down to poor design of either the TV or STB. Not CVBS
being fundamentally better than RGB. On my setup, there is no difference
in 'contrast' when switching the STB output from CVBS to RGB. But a
dramatic improvment on at least some things. Starting with the STB
menu. ;-)

--
*Hang in there, retirement is only thirty years away! *

Dave Plowman London SW
To e-mail, change noise into sound.

"Clyde" wrote in message
newsQEYn.177771$Hs4.100947@hurricane...
On 05/07/2010 22:28, Adrian C wrote:
On 05/07/2010 21:38, ian field wrote:
At some point I hope to be testing a PVR with a rebuilt power board,
however
the only TV at the workshop is a Casio pocket TV (no scart connector -
obviously).

Will a typical VCR present a UHF signal out from scart in???

Yes.


It depends, if the box output can be set as composite video (CBVS) then
Should read CVBS

*Hang in there, retirement is only thirty years away! *

30 years and counting - I'm hoping to live long enough to catch up with the
increasing retirement age ;-).

Paul DS

In article ,
Paul D Smith wrote:
*Hang in there, retirement is only thirty years away! *

30 years and counting - I'm hoping to live long enough to catch up with
the increasing retirement age ;-).


You should note those tags are random. Very much so in my case. ;-)

--
*He had a photographic memory which was never developed*

Dave Plowman London SW
To e-mail, change noise into sound.