Horizontal frequency. Specifically, the sound frequency of
4. 5 MHz is made to be the 286th harmonic of the horizontal line frequency. Therefore,.
where # is the horizontal line-scanning frequency for color television broadcasting. Notice, that 286 is the even number that will make # closest to the value of 15, 750 Hz used for horizontal scanning in monochrome television. The slight difference has practically no effect on horizontal scanning and sync in the receiver because of the horizontal AFC circuit.