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Powerline Conducted Emissions
2.
2.1 Configuration and Procedure
2.1.1 EUT Configuration
The conducted emission test setups are in accordance with Figs 9, 10(a) and 10(b) of
ANSI C63.4-1992, ET Docket 95-19, or EN55022: 1994 / A1: 1995 / CISPR 22:1993 / A1:1995/
A2:1997.
The EUT was set up in the shielded room on the non-conductive table which is 1.0 by 1.5
meter, 80cm above ground. The wall of the shielded room was located 40cm to the rear of the EUT.
Power to the EUT was provided through the LISN. The impedance vs. frequency
characteristic of the LISN is complied with the limit shown on the figure 1 of ANSI C63.4-1992.
Both lines (neutral and hot) were connected to the LISN in series at testing. A coaxial-type
connector which provides a 50 OHM terminating impedance was provided for connecting the test
instrument. The excess length of the power cord was folded back and forth at the center of the lead so
as to form a bundle not exceeding 40cm in length.
Any changes made to the configuration, or modifications made to the EUT, during testing
are noted in the following test record.
If the EUT is a Personal Computer or a peripheral of personal computer, and the personal
computer has an auxiliary AC outlet which can be used for providing power to an external monitor,
then all measurements will be made with the monitor power from first the computer-mounted AC outlet
and then a floor-mounted AC outlet.
2.1.2 Test Procedure
The system was set up as described above, with the EMI diagnostic software running (see
Appendix G). The powerline conducted EMI tests were run on the hot and neutral conductors of the
power cord and the results were recorded.
The highest emissions were analyzed in details by operating the spectrum analyzer in fixed
tuned mode to determine the nature of the emissions and to provide information which could be useful
in reducing their amplitude.
2.1.3 EMI Receiver/Spectrum Analyzer Configuration (during swept frequency scans)
Frequency Range:
Detector Function:
Bandwidth (RBW):
Video Bandwidth (VBW):
International Standards Laboratory
(NVLAP Lab. Code: 200234-0)
Declaration of Conformity
-3-
150KHz--30MHz
Quasi-Peak / Average Mode
10KHz
10KHz
Report Number: ISL-99135FB
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