The Effect of The Placement of Testing Equipment on The Measurement Validity of Radiated Emission Parameter Wisnu Ananda, Seto Ayom Cahyadi, Jumail Soba Center for Material and Technical Product (B4T) Ministry of Industry Bandung, West Java, Indonesia ananda@kemenperin.go.id Deny Hamdani School of Electrical Engineering and Informatics Bandung Institute of Technology Bandung, West Java, Indonesia deny@power.ee.itb.ac.id Abstract— There are a number of factors that may affect the validity in measuring radiated emission test parameters in electromagnetic compatibility (EMC) testing. This research observes the effect of the placement of video pattern generator on the validity of measurement results of radiated emission parameter. The radiated emission measurement with the location of video pattern generator inside and outside of anechoic chamber was conducted. A ferrite absorber was also employed for the latter case to keep up with the noisy environment. The test method used refers to the CISPR 13:2009 standard. The measurement results showed that the difference of the highest peak value from two location was 4.175 dB. The use of ferrite absorber increased this difference to 22.558 dB. Keywords— Electromagnetic Compatibility (EMC), Radiated Emission (RE), video pattern generator, ferrite absorber. I. INTRODUCTION The development of EMC testing method to improve the measurements accuracy and reproducibility is an important topic in the EMC community. This topic is highly needed to produce continuous improvement of the EMC standards. The issues that arise on the EMC testing method can be derived from the chamber, equipment, and configuration used. The problems will become more complex as new electronic devices with new functions emerge. Radiated emission (RE) is one of the EMC phenomena that occurs in almost all electronic devices. RE is the only EMC parameter on television that has a direct influence on humans [1]. One of the RE testing equipment used to measuring television is video pattern generator. The purpose of this study is to observe the effect of the placement of pattern generator and the using of additional ferrite on its cable. The proper installation of the pattern generator shall not interfere the validity of the radiated emission measurement. It must hold the reproducibility of the measurement. II. LITERATURE REVIEW Radiated emission or radiated disturbance is the electromagnetic energy, both desired and undesired, originating from the electronic devices and propagated through the air [2]. The CISPR standard sets the maximum limit of RE quasi-peak value in the majority frequency range from 30 MHz until 1 GHz. Only a few devices which are measured above 1 GHz, such as telecommunication equipment. Research in mitigating RE interference from measurement method side has been carried out by researchers. Kriz and Mullner investigated the chamber influence for radiated emission testing in the frequency range of 1 GHz to 18 GHz [3]. They suggested a Probable Chamber Influence (PCI) value to be used for the radiated emission uncertainty for a wide range of EUT’s [3]. Okuyama et al. suggested a new device, called VHF-LISN, to improve the reproducibility of RE measurements [4]. Gomez et al. executed an experimental verification of a new method for the prediction of system level radiation of electronic devices inside cavities [5]. III. METHODOLOGY This research was conducted in the Electronic and EMC Laboratory, Center for Material and Technical Product (Balai Besar Bahan dan Barang Teknik / B4T), Ministry of Industry. The B4T, which is located in Bandung-West Java, has the 3- meter Semi Anechoic Chamber and equipment needed for doing this project. A. Equipment The equipment used for radiated emission testing refers to the standard CISPR 16-1-1 [6] and CISPR 16-1-4 [7]. CISPR 16-1-1 defines the requirements needed for measuring receivers used in emission measurements. CISPR 16-1-4 defines the requirements of antenna and test site needed for radiated emission testing. The first equipment is the EMI Test Receiver from Rohde&Schwarz (RS) with model ESCI. Its working frequency is from 9 kHz until 3 GHz. The ESCI’s last calibration was in 2016. The second equipment is the Biconnical Antenna to receive the EMI radiated emission signal and deliver it to the EMI Test Receiver. The antenna’s brand is ETS Lindgren with model 2017 International Conference on High Voltage Engineering and Power System October 2-5, 2017, Bali, Indonesia 978-1-5386-0945-3/17/$31.00 ©2017 IEEE 264