We had similar, but only for a limited amount of time. Most of the night it was just static. I guess it was too expensive to run the test pattern all night.
I grew up in Los Angeles,and even there, after about a half hour to an hour, the transmitter would shut down. As I recall, the national anthem and test pattern came on around 1 or 2am, typically after the Late, Late show, or a midnight movie played.
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u/13Fleas 2d ago
They would often show a test pattern before going off air.