EMI Testing Using Spectrum Analyzers vs. Test Receivers

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Spectrum Analyzers for EMI �� Frequency Accuracy of SA - SA resolution is far too course for EMI without subranging the CISPR span - SA frequency accuracy when exploring peaks influenced by Span, RBW, VBW, marker accuracy �� Amplitude Accuracy of SA - 6 dB (EMI) filters vs. 3 dB - QP and AVE detector times are observed - Data correction for system transducers - EUT specific timing issues are considered - Subranges set properly for sample # - RF and IF stages are not overloaded
Spectrum Analyzers for EMI �� Issue # 2 Proper QP and Average Detectors ⇒ Is QP / AVE Detector CISPR-16-1 Compliant? �� Issue # 3 Correct CISPR RBW Filters - Typical SA have 1-3-5 Steps RBW - EMI Filters ..200 Hz, 9 kHz, 120 kHz
Page 1 and 2: EMI Testing Using Spectrum Analyzer
Page 3 and 4: Q&A �� Who uses what ? ⇒ Spec
Page 5 and 6: Spectrum Analyzers for EMI
Page 7 and 8: Spectrum Analyzers for EMI �� R
Page 9 and 10: Spectrum Analyzers for EMI �� Q
Page 11: Level [dBµV] 120 100 80 60 40 20 -
Page 15 and 16: Spectrum Analyzers for EMI � Has
Page 17 and 18: Test Receivers for EMI �� What
Page 19 and 20: 120 100 80 60 40 20 0 50.00 40.00 3
Page 21 and 22: Test Receivers for EMI �� Concl
Page 23 and 24: Which one to use? �� TR is opti
Page 25 and 26: Accurate Measurement �� Backgro
Page 27 and 28: 120 100 80 60 40 20 0 Sample Points
Page 29 and 30: OVLD 1 AP CLRWR IF Overload Example
Page 31 and 32: 1 PK * CLRWR Overdrive and Preselec
Page 33 and 34: Detector Settings �� QuasiPeak
Page 35 and 36: 1 RM AV QP * CLRWR Detector Setting
Page 37 and 38: Conclusion �� TR vs. SA Span Su

EMI Testing Using Spectrum Analyzers vs. Test Receivers

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