ED 525p NTSC Test Pattern

Hi,

ADV739x does not support color bars in ED/HD resolution. Hatch, black bar and flat field test patterns are supported.

Color bars are just available on SD standards. On ED/HD the user can select between a black and white bar, a hatch pattern, and a plain color. On the last two, the color which defines the hatch pattern or the plain frame, can be selected through registers 0x36-0x39.

For ED test patterns, a 27 MHz clock signal must be applied to the CLKIN pin.

To generate an ED black bar test pattern, the settings shown in Table62 should be used with an additional write of 0x24 to Sub-address 0x02. Please refer Page79 in adv739x datasheet.

Thanks,
Dharani S

I am not getting the Hatch Field Pattern for ED. I have configured the analog encoder using the same steps in the data sheet.

Hi,

Please cross check with the reference schematic which is available at ez.analog.com/.../adv739x-design-support-files

And, ED/HD test pattern color controls, three 8-bit registers at Subaddress 0x36 to Subaddress 0x38 are used to program the output color of the internal ED/HD test pattern generator (Subaddress 0x31, Bit 2 = 1), whether it be the lines of the crosshatch pattern or the uniform field test pattern. They are not functional as color controls for external pixel data input. Please refer Page55 in ADV739x datasheet.

For no video case, check Tv info, whether that sink (TV) may support your input format.

Please refer the thread for more details on the hatch test pattern output (+) ADV7393 ED TEST BAR - Q&A - Video - EngineerZone (analog.com)

Thanks,
Dharani S