Rohde & Schwarz FSW26 - EMI Result Analysis; How to Perform EMI Measurements

Measurements
R&S
®
FSW
306User Manual 1173.9411.02 ─ 19
The filter is available for the ENV 216 network only.
Remote command:
INPut:LISN:FILTer:HPASs[:STATe]  on page 806
5.13.5 EMI Result Analysis
The R&S FSW EMI measurement provides functionality to analyze the results.
Marker Demodulation
The R&S FSW is able to demodulate AM and FM signals for acoustic tests and moni-
toring purposes. When the demodulator function is active, the R&S FSW EMI mea-
surement demodulates the signal continuously (regardless of the "Continuous Demod-
ulation" setting in the marker function configuration). The demodulation begins as soon
as a marker is activated. During the initial measurement, demodulation is performed for
the entire measurement span; during the final measurement only the detected peak
marker positions are demodulated (for the defined dwell time). You can listen to the
results during the measurement with headphones or with the internal speaker.
For more information see chapter 7.4.3.7, "Marker Demodulation", on page 515.
Limit Lines
General limit line functionality is provided by the R&S FSW base unit. The base unit
also provides various predefined limit lines that you can use for various applications.
The R&S FSW EMI measurement adds further predefined limit lines designed in com-
pliance with several EMC standards.
Limit line configuration is described in chapter 7.5.3.2, "Limit Line Settings and Func-
tions", on page 528.
5.13.6 How to Perform EMI Measurements
The following step-by-step instructions demonstrate how to perform an EMI measure-
ment with the R&S FSW EMI measurement option.
1. Press the MODE key on the front panel and select the "Spectrum" application.
2. Define the frequency range of the EMI measurement.
a) Press the FREQ key and then the "Frequency Config" softkey.
b) Define the start and stop frequency.
3. Configure the traces for the intial EMI measurement.
a) Press the TRACE key.
b) Select the "Trace Config" softkey to configure as many traces as required.
c) Define the detectors to use for the initial measurement, for example the peak
detector and the average detector.
4. Press the MEAS key on the front panel and select the "EMI" measurement.
Electromagnetic Interference (EMI) Measurement (R&S FSW-K54)