The vertical deflection ( abbrev . " VD " or " ? ", " ? " ) is the angle between the true zenith ( plumb line ) and the line perpendicular to the surface of the reference ellipsoid chosen to approximate the earth's sea-level surface.
32.
But eventually, you'll be overloading the input stages of the vertical deflection subsystem in order to get enough signal through to the deflection plates . ( Our Equalization article discusses this principle . ) For a digital scope, there's probably a " brick wall " filter ahead of the sampling system and you can't beat the Nyquist frequency of the sampler in any case.
