User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
250User Manual 1178.3370.02 ─ 09
7.2.13.5 How to Determine the AM Modulation Depth
The following step-by-step instructions demonstrate how to determine the AM modula-
tion depth.
For remote operation, see Chapter 11.6.13.2, "Example: Measuring the AM Modulation
Depth", on page 728.
1. Apply a modulated carrier signal to the R&S FPL1000 input.
2. On the R&S FPL1000, press the [MEAS] key.
3. Select the "AM Modulation Depth" measurement function from the "Select Mea-
surement" dialog box.
The calculated AM Modulation Depth is indicated in the marker information. The
markers required for calculation are displayed in the marker table.
4. If the signal changes significantly during or after the AM Modulation Depth mea-
surement, use the "Search Signals" function to start a new peak search automati-
cally and restart the calculation of the AM Modulation Depth.
7.2.14 Electromagnetic Interference (EMI) Measurement
The optional electromagnetic interference (EMI) measurement (R&S FPL1-K54) is suit-
able for measurements according to commercial and military electromagnetic compati-
bility (EMC) standards. The functionality of the measurement is particularly useful in
research and development.
The EMI measurement features:
●
EMI marker functionality
●
Marker demodulation
●
Measurement bandwidths and detectors for EMI measurements
●
Logarithmic scaling of the frequency axis
●
Additional predefined limit lines for EMC standards
●
Predefined transducer factors
●
Additional amplitude units, normalized to 1 MHz
●
LISN control
● About the EMI Measurement................................................................................ 251
● EMI Measurement Results....................................................................................251
● EMI Measurement Basics..................................................................................... 252
● EMI Measurement Configuration.......................................................................... 261
● EMI Result Analysis.............................................................................................. 270
● How to Perform EMI Measurements.....................................................................270
● Measurement Example: Measuring Radio Frequency Interference......................272
● Optimizing and Troubleshooting EMI Measurements........................................... 275
Measurements and Results