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Old 14th Jan 2019, 2:52 am   #1
Chris55000
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Join Date: Aug 2007
Location: Walsall Wood, Aldridge, Walsall, UK.
Posts: 2,853
Default TV Transmitter Close Down/Start Up Routines?

Hi!

This refers to the normal daily startup/closedown sequences prior to 24h broadcasting rather than the final analogue TV closure.

I can remember a period of time when BBC2 closed down with a sequence of colour pictures of natural scenes, with music, then a closedown announcement, then sometimes a very short period of TCF with interspered music/tone, then the card faded out to a dark (often greenish) unmodulated synchronised raster with 440Hz/1kHz tone, then an abrupt switch–off leaving just the "snow" and hiss from a no–signal condition.

Can anyone remember if any unusual patterns were transmitted during the night hours?

There used to be a site called "Test Card Memory Lane" that documented a lot of this but I think it's gone now!

Chris Williams
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