Rohde & Schwarz FSV3000, User Manual

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Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
335 User Manual 1178.8520.02 ─ 08
The results of the final measurement are shown in the Result Summary (see Chap-
ter 5.13.2, "EMI measurement results" , on page 325).
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 FSV/A 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 character-
istics of the measured signal. See also
Chapter 5.13.3.2, "Detectors and dwell time" ,
on page 327.
5.13.3.8 Limit checks
General limit line functionality is provided by the R&S FSV/A base unit. The base unit
also provides various predefined limit lines that you can use for various applications.
The 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 can be determined using a different detector than the final test
results, the two limit check results can 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 7.4.2.1, "Basics on limit lines" ,
on page 561.
5.13.4 EMI measurement configuration
Access : "Overview" > "Select Measurement" > "EMI" > "EMI Config"
On the R&S FSV/A, EMI measurement configuration consists of the following settings.
In addition, some common settings are also relevant for EMI measurements:
●
Chapter 10.5.2, "Transducer settings" , on page 714
●
"Reference Level" on page 456
●
Chapter 7.4.2.2, "Limit line settings and functions" , on page 565
● EMI marker configuration ......................................................................................336
● EMI final measurement configuration ....................................................................339
● LISN control settings .............................................................................................343
Electromagnetic interference (EMI) measurement