 Given the similarity of the frequency and line length, this may be due to typographical errors that were never detected or corrected; at the standard clock (equal to 39.722ns per pixel), the "correct" nominal active period should instead be 25.422µs.Otherwise, if the spec were true, that would imply a faster 39.328ns / 25.427 MHz dot clock.Further examination of the other timing details (e.g.