Alignment of a Monochrome TV Transmitter for Broadcasting NTSC Color Signals

This paper describes the measurements and alignment techniques that were used at Television Station WPTZ (Philadelpha) to successfully broadcast a certified NTSC color signal. Certification data were taken using a standard color-bar chart, the phase and amplitude of the color subcarrier being measured with a vectorimeter having a polar display. Additional equipment employed consisted of a wide-band oscilloscope, ten-step staircase generator, frequency burst generator, transmission-line monitor, and a special stabilizing amplifier modified for color operation.