It means that the maximum total err

这意味着最大的总测量误差（仅考虑此类误差）与单个时间间隔t1的测量误差相同。该误差取决于测得的相位角，输入信号的频率以及计数脉冲的频率。但是，通常由于测量时间间隔t1的平均效应，测量的总误差要低得多。<br>如果失真导致零位移，则由输入信号的失真引起的误差很大。<br>穿越时间瞬间。在这种情况下，图1b中脉冲的持续时间t1将不同于正确的值，并且相位测量误差会很大。考虑到两个过零时刻的移动概率相对较低，可以通过测量每个周期两次的时间间隔t1来部分克服此错误。克服输入信号失真引起的误差的另一种可能方法是使用滤波器，但是滤波器会引起一些额外的相移，从而增加测量误差。

It means that the maximum total error of measurement (only this kind of errors considered) is the same as the error of measurement of the single time interval t1. This error depends on the measured phase angle, on the frequency of the input signals, and on the frequency of the counted pulses. But, usually, the total error of measurement is much lower due to the averaging effect of the measured time intervals t1.<br>The error caused by the distortion of the input signals is high if the distortion causes a shifting of the zero<br>crossing time instants. In this case the time duration, t1, of the pulses, Figure 1b, will differ from the correct value and the phase measurement error can be high. This error can be partially overcome by measurement of the time interval, t1, twice per period, taking into account that the probability of the shifting of both zero crossing instants is relatively low. Another possible way to overcome the error caused by the distortion of the input signals is to use filters, but the filters can cause some extra phase shifts which increase the measurement error.

这意味着测量的最大总误差（仅考虑这类误差）与单时间间隔t1的测量误差相同。这个误差取决于测量的相位角、输入信号的频率和计数脉冲的频率。但是，由于测量时间间隔t1的平均效应，通常测量的总误差要小得多。<br>如果失真导致零点偏移，则由输入信号失真引起的误差较高<br>穿越时间瞬间。在这种情况下，图1b中脉冲的持续时间t1将与正确值不同，相位测量误差可能很高。考虑到两个过零瞬间的移位概率相对较低，可以通过测量每个周期两次的时间间隔t1来部分克服该误差。克服由输入信号失真引起的误差的另一种可能的方法是使用滤波器，但滤波器会导致一些额外的相移，从而增加测量误差。<br>