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Originally, the I signal was 1.5 MHz bandwidth and the Q signal was 0.5 MHz bandwidth. A television that made use of both bandwidths would have both a luminance delay line and an "I" signal delay line to ensure the signals arrived at the same time at the CRT. Otherwise, I and Q demod is just like R-Y, B-Y but with different matrix values.
CTC-2 forever!
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