The addition of the analog composite input option enables the Leader LV5770SER03A to display the video signal waveforms of NTSC, PAL, and HD tri-level sync signals, display vectors (NTSC and PAL only), measure SCH (NTSC and PAL only), and measure phase differences against external signals. (For phase difference measurement, an external sync signal that is synchronized and of the same format as the input signal is necessary).