[old_tv_nut]

I have added a question and two comments to the comment section of the video, including a copy of an extensive comment I originally posted on Videokarma about the rebirth and quick demise of I/Q demodulation in RCA's solid state sets, and the problems observed at Zenith when I did a thorough study of the issue. Basically, there was quadrature distortion produced by some color encoders that didn't suppress the lower Q sidebands enough - so some sources looked good and others had objectionable quadrature distortion on color edges. (All the professional encoders met NTSC/FCC specs - the NTSC just never realized they needed tighter specs, and you couldn't see the effects on a 15GP22.) Zenith engineering management would not accept that sometimes the picture would look worse than others. RCA reduced the quadrature effects by reducing the amplitude of the I-channel high frequencies to where they did very little to improve color resolution.