Introduction to General Comprehensive Test Diagram Card

The universal comprehensive test chart card TE105 is used for the general (visual) evaluation of 16:9 TV cameras.It consists of a circular pattern, grayscale, wedge-shaped grating, waveband plate, grid, diagonal and horizontal lines.

The 4th order grayscale density increases from D=0.15 to D=1.65. Integrate electronic grid generator corresponding to 25/15 grid.

The test chart design is mainly used for evaluating the transmission performance of directional electronic cameras. The circular patterns and grids in the image are used to roughly evaluate the geometric structure. The 2MH and 4MHz line grids are distributed throughout the entire image area, with the 4MHz grid tilted at 45 ° and 135 ° angles in the horizontal direction.

Collaborate with the line selection switch oscilloscope to determine the frequency response of modulation depth using a wedge-shaped vertical grid. Use a tilted 1MHz block as a reference value. Further use of wedge-shaped line grids can determine the visual identification of resolution limits. In addition, the effects of cross color interference, notch filtering, and comb filtering were also measured.
The transmission characteristic information of the intermediate frequency (stripe) transmission information located above and below the grayscale block. Roughly evaluate the reproducibility of half tones with the help of grayscale.

There are three diagonals within the gray level square area for interleaved detection. The stepped receiver in this row represents twisted pair. There are two strips placed on the left and right sides, with the local frequency on the left reaching 8 and on the right reaching 16MHz.

The strip on the image is used to determine the following characteristics of the TV camera and TV transmission system:
1. Resolution in horizontal, vertical, and diagonal directions
2. Resolution depends on the scanning position
3. The effect of horizontal and vertical aperture correction
4. Interference effects between the shadow mask structures of color picture tubes with corresponding film and television gratings
5. Camera's horizontal and vertical (or in test images) motion response: dynamic resolution, temporary perturbations