Narrow Results

This paper analyzes the source and the characterization method of white noise in FOCT, researches the statistical properties of white noise in FOCT while the equipment is in a zero-input current environment. Data in time-domain and frequency-domain is analyzed and compared under different primary input current. The result indicates that white noise in FOCT accords with a normal distribution with mean zero, and the noise magnitude is independent of the primary current value. On that basis, we research how the white noise affects the test result of FOCT and provide an effective method to reduce the impact.