Measurements
R&S
®
FSW
289
User Manual 1173.9411.02 ─ 19
The first stage, or peak search, is used to get a rough idea about the location of peak
levels that may indicate interference over the required frequency range. You can use a
detector that allows for a fast sweep time, e.g. the peak detector.
During the second stage, or final test, the R&S
FSW performs the actual EMC test, a
refined measurement with detectors designed for and required by EMC standards. To
keep measurement times brief, the R&S
FSW performs a final measurement only on
frequencies you have marked with a marker or delta marker. You can assign a different
detector to every marker and thus test a particular frequency easily for compliance.
Optionally, you can activate continuous demodulation of the signal during the initial
measurement and at the peak marker positions during the final test.
After the final measurement, you can check the signal levels against specified limits.
5.13.2 EMI Measurement Results
As the result of an R&S
FSW EMI measurement, the measured signal levels and
active markers are displayed in a Spectrum diagram.
Fig. 5-44: EMI measurement results
Initial peak search results - Marker Table
As a result of the initial peak search, the active markers are set to the positive peaks of
the measured signal.
If
Auto peak search and limit lines
are active, the active markers are set to the peak
delta
values between the measured signal and the limit lines.
The active marker levels and positions are displayed in the
Marker Table
.
(Note: the marker results are also displayed in the Result Summary; in addition, the
Marker Table contains the marker results for those markers for which no final EMI test
is performed.)
Electromagnetic Interference (EMI) Measurement (R&S
FSW-K54)
