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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