In other cases, it can either be subtracted from the reading by using the REL (zero) feature or simply canceled out by using built-in zerosuppression if the instrument has this feature.
The stopband zerosuppression is a stricter design constraint than the vanishing moments, and can more effectively manipulate the stopband characteristics of filters.
阻带零点抑制是比消失矩约束更为严格的设计条件，能够更有效地控制滤波器的阻带特性。
3
The core structure of the arc suppression coil is improved to solve the nonlinearity of voltage with zero-excitation. The harm of ferro-resonance is thus reduced.