Hello -
I have an NTSC/PAL video stream via a CVBS signal coming into the THS7368 SD1 channel. There is no on-board filtering and the output has a series 75Ω resistor.
When the BYPASS_SD pin is at a logic low (i.e. the 9.5MHz Sixth-Order Low-Pass filter is enabled) the outputted CVBS stream has a slight green tint. However, when the BYPASS_SD pin is at a logic high (the filter is disabled) the outputted CVBS stream has normal, expected coloring. Can this be explained? Perhaps the reds are more muted or something. Take a look at the rock face in the background - the more orange color is when the filter is disabled and the more yellow color is when the filter is enabled. I'm in the process of taking better pictures.
I'm also testing with an S-video stream on SD2 and SD3 as well as an RGBs signal on SF1-SF3. I have not been able to determine if the coloring is effected on those pathways yet.
I'm curious to know why this is happening and if there is a method for utilizing the built-in filters of the THS7368 without having an impact on the coloring of the provided input.
