Ronde & Schwarz 1304.0004.03, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
270 User Manual 1178.3370.02 ─ 09
7.2.14.5 EMI Result Analysis
The R&S FPL1 EMI measurement provides functionality to analyze the results.
Marker Demodulation
The R&S FPL1000 is able to demodulate AM and FM signals for acoustic tests and
monitoring purposes.
When the demodulator function is active, the R&S FPL1 EMI measurement demodu-
lates the signal continuously (regardless of the "Continuous Demodulation" setting in
the marker function configuration). The demodulation begins as soon as a marker is
activated. During the initial measurement, demodulation is performed for the entire
measurement span; during the final measurement only the detected peak marker posi-
tions are demodulated (for the defined dwell time). You can listen to the results during
the measurement using headphones or the internal speaker.
In FFT mode, demodulation is only performed during the final measurement. You do
not hear any results during the initial measurement.
This feature requires the optional additional interfaces (R&S FPL1-B5).
For more information see Chapter 7.9.4.7, "Demodulating Marker Values and Providing
Audio Output (Marker Demodulation)" , on page 376.
Limit Lines
General limit line functionality is provided by the R&S FPL1000 base unit. The base
unit also provides various predefined limit lines that you can use for various applica-
tions. The R&S
FPL1 EMI measurement adds further predefined limit lines designed in
compliance with several EMC standards.
Limit line configuration is described in Chapter 7.11.2.2, "Limit Line Settings and Func-
tions" , on page 425.
7.2.14.6 How to Perform EMI Measurements
The following step-by-step instructions demonstrate how to perform an EMI measure-
ment with the R&S
FPL1000 EMI measurement option.
For remote operation, see Chapter 11.6.14.8, "Programming Example: EMI Measure-
ment" , on page 736.
1. Press the [MODE] key on the front panel and select the "Spectrum" application.
2. Define the frequency range of the EMI measurement.
a) Press the [FREQ] key and then the "Frequency Config" softkey.
b) Define the start and stop frequency.
3. Configure the traces for the intial EMI measurement.
a) Press the [TRACE] key.
Measurements and Results