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adjusted amplitude applies approximately audio signal beam blanking block diagram brightness burst cable capacitor carrier channel characteristic impedance chroma circuit cm/s coil colour component connected control desk control track correction delay disadvantage distance distortion electron emitter erase head feedback field film filter genlock head wheel helical scan high frequencies horizontal impedance input K-factor lamp light line sync loudspeaker luminance luminous flux machine magnetic metres microphone mirror modulation monitor noise objective lens obtained opto-isolator oscillator oscilloscope output perfotape phase detector picture pulse picture sync picture tube playback plumbicon position possible potentiometer printed circuit board problem quadruplex remanence reproduction resistance resistor result Section shown in Figure sound square wave studio supply switching sync pulse synchronisation tape speed target television tuner U-matic vector vectorscope velocity vertical video amplifier video disc video recorder video signal vidicon voltage