EMI Testing Using Spectrum Analyzers vs. Test Receivers

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Transducers and PRF �� Transducer correction - CISPR needed a way to eliminate effects of chambers, antennas and cable losses - Standards require normalization of these effects to compare results to limit line �� EUT dwell time requirements - Must capture “worst case” emissions of EUT - Cycle time and pulse repetition frequency may require extended dwell in each subrange
Conclusion �� TR <strong>vs</strong>. SA Span Subranges step size resolution dwell time overloading preselection �� RF & IF Overloads RF -> Harmonics IF -> If overload flag Attenuator Ref Level �� Preamps amplify at antenna know linear region below 1gz system check (attenuator) static
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 and 12: Level [dBµV] 120 100 80 60 40 20 -
Page 13 and 14: Spectrum Analyzers for EMI �� I
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: 1 RM AV QP * CLRWR Detector Setting

EMI Testing Using Spectrum Analyzers vs. Test Receivers

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