Quantum Data 700 Series manual Ramp, PulseBar, Burst

Pattern Descriptions

Ramp

Description - This image provides an active video area starting from full black (+7.5 IRE for NTSC) at one edge of the screen to full white (+100 IRE) at or near the opposite end of the screen.

Application - Useful for testing pixel anomolies and chrominance.

PulseBar

Description - The image looks like two vertical lines followed by a wide vertical bar on a display’s screen. The first line is a red pulse. The pulse is 20 T for PAL and 12.5 T for NTSC formats. The second narrower line is a 2 T white sine-squared pulse. T = 100 nSec for PAL and 125 nSec for NTSC formats. The wide bar is white with sine-squared edges.

Application - This image is intended for TV formats, but can be displayed with any format up to 100 MHz.

Burst

Description - The left side starts with reference white and black levels. This is followed by six bursts of square waves. Each burst is at a different frequency, forming vertical lines of various widths. The frequencies, going from left to right, are 0.5, 1, 1.53, 2.04, 3.06 and 6.13MHz.

Application - The image can also be used with a TV waveform analyzer to check the frequency response of a video system. One scan line of the image, as it would appear on a waveform analyzer. High frequency roll-off (loss) would show up as a decrease in the peak-to-peak swings on the right side of the waveform. Low frequency roll-off would show up as a decrease in the peak-to-peak swings on the left side of the waveform.

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