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Multimedia equipment emission standard CISPR32 requires the use of a free-space antenna factor in radiated emission measurement of equipment under test (EUT). The calibration method for antennas to be used in radiated emission measurement is stipulated in CISPR16-1-6 and ANSI C63.5. In ANSI C63.5, because antennas used in a frequency range of 30 MHz to 1 GHz are susceptible to vertical polarization...
According to the standard method for calibration of receive antennas to be used in radiated emission measurement below 1 GHz, the sensitivity of receive antenna is defined as a free-space antenna factor obtained by applying a given correction factor to a near free-space factor that is determined by horizontally polarized antenna calibration at a 2 m antenna height. In actual radiated emission measurement...
Specifications for the terminating condition of EUT cables leaving from test area have not been specified in any standards, although it is one of the sources of poor measurement uncertainty for the radiated emission measurement. To improve the reproducibility of a radiation emission measurement among test sites, VHF-LISN is proposed to simulate artificially AC mains network as the device for specifying...
At present, radiated emission measurement standards do not specify the common mode impedance for the outlet terminal of mains network to equipment under test (EUT) in the test site. Because of the difference in the terminating condition of EUT power cable which dominantly causes radiated emission in the frequency range between 30 MHz and 300 MHz, radiated emission measurements of a tabletop EUT are...
Site VSWR to evaluate radiated emission test sites above 1 GHz is defined by CISPR 16-1-4. However, the Site VSWR has been specified without theoretical basis and its limit was also changed several times without reasonable grounds. We confirmed that site attenuation is suitable for evaluation of radiated emission test sites above 1 GHz and we devised a method to evaluate radiated emission test sites...
At present, radiated emission measurement standards do not specify the common mode impedance for the outlet terminal of mains network to the equipment under test (EUT) in the test site, i.e., do not define the common mode impedance as the terminating condition on the far end of the EUT power cable. Because of the difference in the terminating condition of the EUT power cable which dominantly causes...
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