User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
261User Manual 1178.3370.02 ─ 09
The results of the final measurement are shown in the Result Summary (see Chap-
ter 7.2.14.2, "EMI Measurement Results", on page 251).
Defining a Dwell Time for the Final Measurement
EMC tests often require a specific dwell time for an EMI measurement. The dwell time
defines how long the R&S FPL1000 measures the signal at the frequencies of the
marker positions. The dwell time is identical for all EMI final measurements and is thus
defined in the EMI measurement configuration. Select a dwell time according to the
characteristics of the measured signal. See also "Detectors and Dwell Time"
on page 253.
Limit Checks
General limit line functionality is provided by the R&S FPL1000 base unit. The base
unit also provides various predefined limit lines that you can use for various applica-
tions. The R&S FPL1 EMI measurement adds further predefined limit lines designed in
compliance with several EMC standards.
When using limit lines in combination with EMI measurements, the marker levels from
the initial measurement are compared to the limit line values. The result of the limit line
check is displayed in the diagram as usual.
In the EMI Result Summary, the limit check is based on the results of the final test.
Since the marker may be determined using a different detector than the final test
results, the two limit check results may differ. The difference between the limit line and
the measured value is colored to indicate the following states:
●
green: does not exceed limit
●
yellow: within margin
●
red: exceeds limit
For more information on using limit lines see Chapter 7.11.2.1, "Basics on Limit Lines",
on page 421.
7.2.14.4 EMI Measurement Configuration
Access: "Overview" > "Select Measurement" > "EMI" > "EMI Config"
On the R&S FPL1, EMI measurement configuration consists of the following settings.
In addition, some common settings are also relevant for EMI measurements:
●
Chapter 9.7.2, "Transducer Settings", on page 525
●
"Reference Level" on page 311
●
Chapter 7.11.2.2, "Limit Line Settings and Functions", on page 425
● EMI Marker Configuration..................................................................................... 261
● EMI Final Measurement Configuration..................................................................265
● LISN Control Settings............................................................................................268
EMI Marker Configuration
Access: [MKR] > "Marker Config"
Measurements and Results