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DATE
DOCUMENT NAME
DOCUMENT #
PAGE
May 21, 2004
Harman Multimedia JBL OnStage EMC Test Report
2004 050310 EMC
70 of 80
APPENDIX A
A. Conducted & Radiated Emissions Measurement Uncertainties
1. Introduction
ISO Standard 17025 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
Conducted Emissions Measurement Detection Systems
Applicable Frequency
Range
"U” for a k=2
Coverage Factor
HP8568B Spectrum Analyzer with QPA and HP8447F Preamplifier
150 kHz - 30 MHz
+/- 3.0 dB
HP8566B Spectrum Analyzer with QPA and Preselector
9 kHz - 30 MHz
+/- 2.9 dB
Radiated Emissions Measurement Detection Systems
Applicable Frequency
Range
"U” for a k=2
Coverage Factor
HP8568B Spectrum Analyzer with QPA & HP8447F Preamplifier
30 MHz - 200 MHz
+4.0 dB, -4.1 dB
HP8568B Spectrum Analyzer with QPA & HP8447F Preamplifier
200 MHz-1000 MHz
+/- 3.5 dB
HP8566B Spectrum Analyzer with QPA & Preselector
30 MHz - 200 MHz
+3.9 dB, -4.0 dB
HP8566B Spectrum Analyzer with QPA & Preselector
200 MHz-1000 MHz
+/- 3.4 dB
HP8566B Spectrum Analyzer with QPA & HP 8449A Preamplifier
1 GHz - 18 GHz
+2.5 dB, -2.6 dB
HP8566B Spectrum Analyzer with QPA & HP8449A 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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