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Open Field Radiated Emissions
3.
3.1 Configuration and Procedure
3.1.1 EUT Configuration
The radiated emissions test setups are in accordance with Figs 10(c) and 10(d) of ANSI
C63.4-1992, CFR 47 Part 15 Subpart B; or EN55022:1994/ A1:1995/A2:1997; CISPR
22:1993/A1:1995/A2:1996.
The equipment under test was set up on the 10 meter open field test non-conductive table
80cm above ground, same as conducted Excess data cable was folded back and forth to form a 30cm
by 40cm bundle.
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.
3.1.2 Test Procedure
The system was set up as described above, with the EMI diagnostic software running. We
found the maximum readings by varying the height of antenna and then rotating the turntable. Both
polarization of antenna, horizontal and vertical, are measured.
The highest emissions between 30 MHz to 1000 MHz were also analyzed in details by
operating the spectrum analyzer and/or EMI receiver in quasi-peak mode to determine the precise
amplitude of the emissions. While doing so, the interconnecting cables and major parts of the system
were moved around, the antenna height was varied between one and four meters, its polarization was
varied between vertical and horizontal, and the turntable was slowly rotated, to maximize the emission.
The highest emissions of frequency bigger than 1000 MHz was analyzed in peak mode to determine
the precise amplitude of the emission.
3.1.3 EMI Receiver/Spectrum Analyzer Configuration (for the frequencies tested)
Frequency Range A:
Detector Function:
Bandwidth (RBW):
Frequency Range B:
Detector Function:
Bandwidth (RBW):
International Standards Laboratory
NVLAP Lab. Code: 200234-0; VCCI: R-341, C-354; NEMKO Aut. No: ELA 113; BSMI Lab. Code: SL2-IN-E-0013
Declaration of Conformity
-6-
30MHz--1000MHz
Quasi-Peak Mode
120KHz
1000MHz--5000MHz
Peak Mode
1 MHz
Report Number: ISL-00A105FB
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