EMCSimLab requires a high performance oscilloscope (MDO34), for pre-compliance qualification purpose. You can use EMC receivers or only an oscilloscope + its probe.

Acquisitions

• Use ideally 2x acquisitions to cover 1 sec of signal + up to 25MHz of frequency content:
  • [002ms/div; 1Mpts; AC Mode; Hires ON].
  • [100ms/div; 1Mpts; AC Mode; Hires ON].

EMC Receiver + Oscilloscope Set-Up

• Set 50 Ohms input on oscilloscope with known receivers like LISN, 1500 Ohms probe.
• Get signal in AC mode, with optimum vertical scale to get the highest resolution.

Oscilloscope + its probe Set-Up

• Choose an adequate probe; note oscilloscope AC mode is high pass at only 50 Hz (LISN proposes 150 kHz high pass).
• Get signal in AC mode, with optimum vertical scale to get the highest resolution.
• Perform (usual case) a measurement between ground (chassis) and live point of interest.

EMCSimLab was tested against a standard Spectrum Analyser (8594EM), on 3 detectors: Peak, Average and Quasi Peak. Results can be found below. Some difference exists (seems that the 8594EM applies some averaging in addition to the detector); still the author believes the results are perfectly valid for a pre-compliance phase.
Note: It is possible to get a very valid overview of the performance even without any EMC receiver (LISN or 1500 Ohms probe). Using simply a high performance single ended probe can be used to acquire the signal of interest, even not providing a constant impedance to noise of interest.

EMCSimLab + LISN

Detector: Peak Peak  -  Average Average  -  Quasi-Peak Quasi-Peak

EMCSimLab + 1500 Ohms-probe

The very low level of noise measured in this case is a challenge. 1500 Ohms comes with a 30 dB gain attenuation, which results in less than mVolts to be measured and computed. Still, results are consistent, and would be perfectly correct on stronger levels.

Detector: Peak Peak  -  Average Average  -  Quasi-Peak Quasi-Peak