Artificial power network V-type artificial power network provides a specified high-frequency impedance between the terminals of the tested instrument and the reference ground, while isolating useless RF signals in the power supply from the test circuit. Use a V-type artificial power network with a 50 Q/50 pH (or 50 Q/50, H+5 Q) as specified in Chapter 4 of CISPR 16-1-2003. To ensure that the impedance of the power grid does not have a serious impact on the impedance of the V-type artificial power network at the measurement frequency, an appropriate RF impedance should be inserted between the V-type artificial power network and the power grid. This impedance will also reduce the impact of unwanted signals present on the power grid (see also 5.3). The V-type artificial power network is connected to the measurement receiver using a coaxial cable with a characteristic impedance of 50. 5.1.3 Voltage probe When measuring not on the power terminal (see 5.2.3.2) but on other terminals, such as the load or control terminal (see 5.2.4.4), use a voltage probe. When an artificial power supply network cannot be used and there is no adverse effect on the tested instrument or equipment, a voltage probe can also be used at the power terminal for measurement, such as measuring motors and heating devices with a current greater than 25A per phase. The voltage probe is composed of a resistor with a resistance value of at least 1500 Q connected in series with a capacitor whose reactance value can be ignored relative to the resistance value (within the range of 150 kHz to 30 MHz) (see 5.2 in CISPR 16-1-2:2003). The measured value should be corrected according to the voltage distribution between the probe and the measuring device. This correction only considers the pure resistance part. If the probe impedance value is too low, which affects the normal operation of the test instrument, the probe impedance value should be increased as needed (at 50/60 Hz and RF) (such as 15 kQ series connection at 500 pF). In order to simulate the influence of the user's hand, the handheld device needs to use a simulated hand during the disturbance voltage measurement process. The analog hand is composed of a metal foil at one end (M end) of an RC component connected in series to a 220 pF ± 20% capacitor and a 510 Q ± 10% resistor [see a) in Figure 8]; The other end of the RC component is connected to the reference ground of the measurement system (see CISPR 16-1-22003). The RC components of the analog hand can be installed inside the artificial power network
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