I'm using the GBS-C for 240p passthrough, RGBHV converting to YPbPr output. Source is a Dreamcast outputting the grid pattern from 240p test suite. Part of the right side of the image is being cut off by the GBS-C (see image below). If I use the "Picture Control" "Move Picture" feature in the GBS settings, I can move the image to the left but it exposes a green band artifact instead of the expected rest of the grid image. If I play with the "HS shift" function in the "Development" tab, I can move the whole thing, including the green part, from left to right, so that doesn't help.
Any help would be greatly appreciated! In the meantime I can try other means of horizontally shifting the image before it hits the GBS-C as a workaround