The Spectrum Application (RF Measurements)
R&S
®
FPL1000
250
User Manual 1178.3370.02 ─ 11
6.2.13.5
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 10.6.13.2, "Example: Measuring the AM Modulation
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.
6.2.14
Electromagnetic Interference (EMI) Measurement
The electromagnetic interference (EMI) measurement is suitable for measurements
according to commercial and military electromagnetic compatibility (EMC) standards.
The functionality of the measurement is particularly useful in research and develop-
ment.
The EMI measurement requires the R&S
FPL1-K54 option.
The EMI measurement features:
●
EMI marker functionality
●
Marker demodulation
(Requires R&S
FPL1-B5)
●
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
(Requires R&S
FPL1-B5)
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Measurements and Results