TV-experiments

Hello all,

I have been trying to materialize my (maybe wicked) ideas. I am trying
to use a broken tv and a spare monitor (LCD) to watch television. This
means that I use the reception print of the TV only, to convert the
antenna signal and the monitor to watch these. It works (simply as an
extra monitor), but I the monitor does not display videotext. This is
not the biggest problem, I also cannot see the OSD of the TV. For
example the menu to seek programs... This is a problem.

Does anyone have any ideas? I have been thinking in the direction of
connection some wires in the SCART (the only output of the TV print).
But which? and where to?

Hope to get some reactions,

Jzz

 

Two problems

1. Within the original TV tuner, videotext and OSD are RGB signals.
These are not normally output on the SCART connector - you would have to
arrange this.

2. If your LCD monitor is using CVBS then you will need to mix these RGB
signals. Could be difficult, it is unlikely your monitor has a "fast
blanking" input that might help here. However, you could use the LCD
monitor's RGB input (VGA socket?) and manually switch over to that input.

 

Two problems

-----

Thanks for the reply,

Do you mean I have to arrange the signals to the SCART connector in
the print or on the cable? The cable I can manipulate (quite) easily,
but the print not.

VGA socket is not the problem, I think (hope).

Jzz

 

The RGB signals will be coming from the print (circuit board) from a
graphics charactor generator chip. This will normally be connected to
the TV's high voltage tube circuits, which you will need to disconnect
and be very careful doing so.

Then you may have to adjust the level of each signal for 0-0.7V drive
for your VGA socket, and also provide horizontal/vertical
synchronisation signal. Which also may be another problem - you need
some practical experience here of understanding types of video signals
and how to design interfacing circuits.

You may find it a lot easier (and safer!) to work with an old video
cassette recorder as a tuner and use on-line listings rather than videotext?

 

Good idea!

It's just that I had this old tv available, but an old VCR is quite
easy to come by, of course.

Reading this I think it is not really realistic to try this.

Jzz