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Applications
R&S
®
RTB2000
120User Manual 1333.1611.02 ─ 03
9 = Resolution bandwidth
10 = Channel providing input data
11 = Opens the FFT short menu
12 = Amplitude vertical scale (range per division)
Data source
FFT analysis is performed on the data captured from one of the active input channels,
or on ona of the active math or reference waveforms. Analysis can only be performed
on one channel at a time.
Time base
FFT analysis is performed on the data captured during the entire data acquisition. To
restrict the time base for which FFT analysis is to be performed (thus reducing calcula-
tion time), you must increase the resolution bandwidth (see
"RBW" on page 124).
Frequency range
The display can be restricted to the results for a specified frequency range.
8.2.2 Performing FFT Analysis
1. To adjust the instrument settings to the current input signal automatically, press
AUTOSET.
2. Press the FFT key twice to open the FFT menu.
3. Select the "FFT Window" type according to the signal characteristics that are most
relevant for your measurement task (see
"FFT Window" on page 121).
4. In the "Waveform" menu, enable the waveforms you want to display (see "Wave-
form" on page 122).
From each waveform type, you can also create a reference waveform for further
analysis.
5. In the shortcuts for FFT, set the "Start" frequency, "Stop" frequency, "Span" and
"RBW".
6. To start and stop FFT analysis, press the RUN STOP key.
8.2.3 FFT Setup
You can set the parameters for the FFT analysis in the FFT menu and in the shortcuts
for FFT.
► To open the menu, press the FFT key.
If the FFT analysis was not enabled, tap twice: Once to enable FFT, and next to
open the menu.
The FFT menu opens and the shortcuts are displayed on the screen.
FFT Analysis
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