There'll be an automatic setting on it, uses a signal sent via scart lead as to whether the broadcast is 4:3 or 16:9
The equipment supplying the switching signal has to support the switching standard too, and you have to make sure you're using a SCART lead which has the switching line connected. Most modern digital TV receivers etc. will support the widescreen switching, but if you are looping through a VCR or some other device which does not, then the signal will be lost along the way. In those cases the auto setting might not work properly.
one of my pet hates, even worse when a programme is being broadcast in widescreen but they haven't set their digital box to output 16:9 so they end up stretching a 4:3 pic!
A lot of people don't even seem to realize that the digiboxes have an option for video output format. You want to set 16:9 if you are connecting to a widescreen TV, otherwise choose the appropriate 4:3 format. There are often multiple 4:3 options to give "letterboxed" widescreen display or compromise zoom settings etc.
What I hate even more are all those options provided on some sets which are there to do nothing but
deliberately distort the picture geometry. TV engineering spent years ironing out linearity problems to get the best possible picture, now the manufacturers are adding options to purposely distort everything.
The broadcasters are getting as bad in some respects. They're so obsessed with widescreen that if you see one of those shows with old 4:3 TV clips they're using a compromise format to reduce the sidebars which results in the top and bottom of the picture being lost.
Don't even get me started on the way that they sometimes don't even set the format flag properly when switching between 4:3 and widescreen formats. How many times have you seen a show start in the wrong format, to have it jump to the correct ratio a minute later when somebody finally notices that it's wrong?
The whole aspect ratio issue has become a horrible mess.
Remember, CRT's only came up to 36inch widths in widescreen and upto around 29 inch in 4:3
I'm not sure where you got that limit from Dennis. Regular 4:3 CRTs were being made up to 36 inches or so back in the 1970s.
Plasma and similar flat screen TVs are in reality,just fashion accessories. A good quality CRT set will have better picture quality and last longer. {.....} many misguided individuals are dumping them for inferior flat screen technology