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DATE
DOCUMENT NAME
DOCUMENT #
PAGE
April 8, 2008
Harman Multimedia - JBL Radial Micro - EMC Test Report
2006 100765 EMC Rev.1
66 of 74
APPENDIX A
A. Radiated Emissions Measurement Uncertainties
1. Introduction
ISO/IEC 17025:1999 and ANSI/NCSL Z540-1-1994 require that all measurements contained in a test
report be “traceable”. “Traceability” is defined in the International Vocabulary of Basic and General
Terms in Metrology (ISO: 1993) as: “the property of the result of a measurement... whereby it can be
related to stated references, usually national or international standards, through an unbroken chain of
comparisons, all having stated uncertainties”.
The purposes of this Appendix are to “state the Measurement Uncertainties” of the conducted emissions
and radiated emissions measurements contained in Section 5 of this Test Report, and to provide a practical
explanation of the meaning of these measurement uncertainties.
2. Statement of the Worst-Case Measurement Uncertainties for the Conducted and Radiated
Emissions Measurements Contained in This Test Report
Table 1: Worst-Case Expanded Uncertainty "U" of Measurement for a k=2 Coverage Factor
Radiated Emissions Measurement Detection Systems
Applicable Frequency
Range
"U” for a k=2
Coverage Factor
Spectrum Analyzer with QPA & Preamplifier
30 MHz - 200 MHz
+3.9 dB, -4.0 dB
Spectrum Analyzer with QPA & Preamplifier
200 MHz-1000 MHz
+/- 3.5 dB
Spectrum Analyzer with Preamplifier
1 GHz - 18 GHz
+2.5 dB, -2.6 dB
Spectrum Analyzer with Preamplifier
18 GHz - 40 GHz
+/- 3.4 dB
NOTES:
1. Applies to 3 and 10 meter measurement distances
2. Applies to all valid combinations of Transducers (i.e. LISNs, Line Voltage Probes, and Antennas, as appropriate)
3. Excludes the Repeatability of the EUT
1. Applies to 3 and 10 meter measurement distances
2. Applies to all valid combinations of Transducers (i.e. LISNs, Line Voltage Probes, and Antennas, as appropriate)
3. Excludes the Repeatability of the EUT
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