[OT ish] PAL/RGB TV problem

["Paul Robinson" <ukcueman@xxxxxxx>]

A friend has just bought a Thomson digibox for viewing the FreeView stuff.

When connected to his TV via both RF and Scart leads, changing the TV to
view analogue stuff via the RF lead produced the correct audio but with a
very dodgy picture. It would show the channel being shown by the digibox,
but very dark and unstable in that it would be constantly moving right, as
if it had lost "horizontal hold". So it was showing the digibox
video
regardless of which analogue channel was selected on the TV, but the audio
was the correct analgoue audio channel.

Apart from these symptoms, everything worked as expected. Connecting an LCD
TV produced a perfect picture with none of these problems.

After much playing, I fixed the symptoms by changing the digibox so that it
used "PAL" instead of "RGB".

What would it mean if the digibox uses PAL? Does anybody understand what
this means the problem was? Is there a better solution?

Thanks,
Paul