Anyone remember On TV? Their audio was modulated on a subcarrier that was easily demodulated with a single chip PLL. And the video was just mixed with a sine wa

Anyone remember On TV? Their audio was modulated on a subcarrier that was easily demodulated with a single chip PLL. And the video was just mixed with a sine wave at, I think, the vertical scanning rate - super easy to mix in a 180 degree out of phase sine wave with a crude manual potentiometer adjustment for amplitude. I built one of those decoders and although it was a bit unstable and would lose sync now and then it worked well enough.