How To Perform Measurements In The Analog Demodulation Appli- Cation - R&S FSW-K7 User Manual

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R&S FSW-K7
8 How to Perform Measurements in the Ana-
log Demodulation Application
The following step-by-step instructions demonstrate how to perform an Analog Demod-
ulation measurement with the optional Analog Demodulation application.
1. Press the MODE key and select the "Analog Demod" application.
2. Select the "Overview" softkey to display the "Overview" for an Analog Demodula-
tion measurement.
3. Select the "Input/Frontend" button and then the "Frequency" tab to define the input
signal's center frequency.
4. Select the "Data Acquisition" button and define the bandwidth parameters for the
input signal:
(Note: in MSRA/MSRT mode, define the analysis interval using the same settings.)
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5. Optionally, select the "Trigger" button and define a trigger for data acquisition, for
example an offline demodulation trigger to start capturing data only when a useful
signal is transmitted.
6. Select the "Demod/Display" button and select the demodulation displays that are of
interest to you (up to 6).
Arrange them on the display to suit your preferences.
7. Exit the SmartGrid mode and select the "Overview" softkey to display the "Over-
view" again.
8. Select the "Demodulation Settings" button to define demodulation parameters for
each evaluation:
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9. Select the "Analysis" button in the "Overview" to make use of the advanced analy-
sis functions in the demodulation displays.
User Manual 1173.9240.02 ─ 23
How to Perform Measurements in the Analog Demodulation Application
"Demodulation Bandwidth": the span of the input signal to be demodulated
"Measurement Time": how long the input signal is to be measured
"Resolution Bandwidth": how precise the signal is to be demodulated
"Capture Offset" (multistandard mode only): the offset of the analysis interval
from the start of the capture buffer
Configure the "Squelch" function (on the "Demod" tab) to suppress noise dur-
ing demodulation.
For time domain evaluations, zoom into the areas of interest by defining a
zoom area (on the "Demod" tab).
For AF evaluations, use special filters to eliminate certain effects of demodula-
tion or to correct pre-emphasized modulated signals (on the "AF Filters" tab).
Adapt the diagram scaling to the displayed data (on the "Scaling" tab).
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