Noise terminal voltage

When using electrical and electronic equipment, harmonic noise voltage can occur at the power input terminals such as commercial outlets. This noise terminal voltage is transmitted to the power supply side as noise and can have a negative impact on other loads, so it must be suppressed below standard levels. When attempting to measure the noise terminal voltage directly, errors due to the impedance of the power supply side circuit occur, making accurate measurement difficult. Therefore, in order to eliminate measurement errors caused by the impedance of the noise terminal voltage and measure it accurately, a line impedance stabilization network is connected between the commercial outlet and the electrical or electronic device.