V.H.S. and Betamax versus 8 m.m.

[ARC Tech-109]

Has to do with the Nyquist frequency rate at the high end of the carrier frequency, moving the white clip (high end) will give an increase in the resolution (slight) and improve the white dynamic range without clipping or compromising the signal/noise ratio. Take a look at the attached pdf as this may give you some insight.