Draw the composite video signal of negative polarity for a horizontal line, showing H-blanking pulse, H-sync pulse, colour burst signal and variable video signal. Mark width (in s) of various components of this CVS (not to the scale) and amplitude of sync top, pedestal level, black set-up, pedestal height, and white level in terms of percentage modulation obtained in the video carrier. Why areporches needed in the blanking pulse?
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