Rohde & Schwarz FSW26 - 5.13.3 Emi Measurement Basics; EMI Measurement Basics; Resolution Bandwidth and Filter Types

Measurements
R&S
®
FSW
290User Manual 1173.9411.02 ─ 19
Final test results - Result Summary
The results of the final EMI tests at the active marker frequencies are displayed in the
Result Summary.
The Result Summary provides the following information:
Label Description
Type Marker name
Ref Reference marker for delta markers
Trace Assigned trace
X-value Marker x-value (frequency for final test)
Y-value Marker y-value (level during inital measurement)
Final Test Detector used for final EMI test
Line name Line activated for limit check
Δ Limit
Delta between measured level and limit line (if active)
The value is colored to indicate the following states:
●
green: does not exceed limit
●
yellow: within margin
●
red: exceeds limit
Final Result Value measured during final EMI test using specified detector at marker frequency
5.13.3 EMI Measurement Basics
Some background knowledge on basic terms and principles used in EMI measure-
ments is provided here for a better understanding of the required configuration set-
tings.
● Resolution Bandwidth and Filter Types.................................................................290
● Detectors and Dwell Time.....................................................................................291
● Frequency Resolution - Sweep Points and Scaling.............................................. 294
● Controlling V-Networks (LISN)..............................................................................295
● Using Transducer Factors.....................................................................................296
● Initial Measurement - Peak Search.......................................................................296
● Final Measurement at the Marker Position........................................................... 297
● Limit Checks..........................................................................................................298
5.13.3.1 Resolution Bandwidth and Filter Types
EMI testing requires resolution filters with a 6 dB bandwidth. The R&S FSW EMI mea-
surement adds the following bandwidths that comply to commercial and military stand-
ards to those already available with the base unit:
Commercial (CISPR, FFC etc.)
● 200 Hz
● 9 kHz
Electromagnetic Interference (EMI) Measurement (R&S FSW-K54)