Abstract: A television receiver includes a tuner responsive to a tuning voltage generated by a signal seeking tuning control unit and a channel indicator for displaying a vertical bar on the screen of the picture tube. The horizontal position of the bar is determined by the magnitude of the tuning voltage. The channel indicator includes a ramp signal generator for generating a composite ramp signal including a horizontal deflection rate ramp signal superimposed on the tuning voltage, a first AND function gate acting as a comparator to generate a first transition when the amplitude of the composite ramp signal traverses a switching threshold, a differentiator for determining the width of the bar having an input coupled to the output of the first AND function gate and an output coupled to a second AND gate which selectively couples the output signal of the differentiator to the picture tube when it is desired to display the bar.