Digi-Frame DF-1044r Manual de usuario Pagina 214

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Mathematics
R&S
®
RTO
198User Manual 1316.0827.02 ─ 06
Select the "Relative" mode and enter the percentages of the total time base that
define the "Relative Start" and "Relative Stop" times.
If a zoom area has already been defined in the original diagram and you want to
use the same time base for FFT analysis, select "Zoom coupling" and then an
active zoom diagram.
2. Tap the "Use gate" icon.
3. To indicate the defined gate area in the original diagram, tap the "Show gate" icon.
The FFT waveform displays the spectrum for the indicated area in the original time
base.
To display advanced FFT waveforms
In "Advanced" math definition mode, other FFT results than the basic frequency magni-
tude can be displayed.
1. In the "Setup" tab of the "Math" dialog box, select the "Advanced" expression editor.
2. Double-tap the edit area.
The "FormulaEditor" is displayed.
3. Tap the "More" key to display further functions in the editor.
4. Tap the required function key.
5. Select the source channel.
6. Close the parenthesis and tap "Enter".
6.3.3 FFT Configuration Settings
6.3.3.1 FFT Setup
In this tab you define the settings for the FFT window. The display can be restricted to
the results for a certain time base extract and to a specified frequency range.
FFT Analysis
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