Measurements and Results
R&S
®
FSW
354
User Manual 1173.9411.02 ─ 43
8. Configure the traces for the initial EMI measurement.
a) Press the [TRACE] key.
b) Press the "Trace Config" softkey to configure two traces.
c) Define the detectors to use for the initial measurement. Select the peak detec-
tor for trace 1 and the average detector for trace 2.
The peak detector ensures that the detected peak levels in the frequency range
covered by one pixel are displayed.
The R&S
FSW now displays two traces. Trace 1 shows the peak values, trace 2
shows the average values.
9. Increase the number of sweep points for the EMI measurement.
a) Press the [SWEEP] key on the front panel.
b) Select the "Sweep Config" softkey.
c) Set the number of "Sweep Points" to
200000
.
10. Press the [AMPT] key, then select the "Amplitude Config" softkey and, in the
"Amplitude" dialog box, select
V
as the "Unit".
Performing the measurement
1. Configure the EMI measurement markers. In this example we will use 6 markers.
a) Select the "Marker Config" softkey and activate six normal markers.
b) Set markers 1 to 3 on trace 1. Set markers 4 to 6 on trace 2.
c) For each of these markers, select the "CISPR AV" detector to be used for the
"Final Test", i.e. the subsequent EMI measurement at the marker positions.
2. Select a limit line against which the marker results are checked.
a) Press the [Lines] key and then the "Lines Config" softkey, then select the "Lines
Config" tab.
b) In the "Line Config" dialog box, select the "View Filter" option: "Show Compati-
ble".
All stored limit lines with the file extension
.LIN
in the
limits
subfolder of the
main installation folder of the instrument that are compatible to the current EMI
measurement settings are displayed in the overview.
c) In the overview, click the "Check Traces" setting for the
EN55011A
limit line
and select trace 1 to be included in the limit check. (Trace 2, which is defined
as the average, will always be lower than trace 1, which contains peak values.)
3. Press the [RUN SINGLE] key to start a new EMI measurement.
If activated, a peak search is performed. For each active marker, a final measure-
ment is performed using the specified detector for the specified dwell time.
If activated, the signal is demodulated. During the initial measurement, demodula-
tion is performed for the entire measurement span; during the final measurement
only the detected peak marker positions are demodulated (for the defined dwell
time).
The specified traces to be checked are compared with the active limit line. The sta-
tus of the limit check for the final measurement is indicated in the Result Summary.
Electromagnetic Interference (EMI) Measurement
Содержание FSW Series
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