FFT and RBW
3- 176
WCA230A & WCA280A User Manual
The Real Time S/A mode has FFT overlap capability that computes FFT
while overlapping 1024-point FFT frames by a specified number of samples.
The RBW/FFT menu contains the following controls:
NOTE
. In the Real Time S/A mode, the FFT points is always 1024 and FFT-
processed data does not go through RBW process (see Figure 3--124 on
page 3--175).
FFT Start Point.
Sets the start point of the 1024-point FFT frame by the
number of samples from the previous frame (see Figure 3--125).
Range: 1 to 1024 samples in increments of 2
n
.
FFT Overlap.
Displays the amount of overlap between frames used to calculate
consecutive FFTs (see Figure 3--125). Not settable. The sum of FFT Overlap and
FFT Start Point is always 1024.
FFT Window...
Selects the FFT window (window function).
For the window type, refer to Table 3--27 on page 3--180.
The default is Blackman-Harris 4B.
Time-domain data
Frame 1
Frame 2
Frame 3
FFT
Start Point
Time
FFT
Overlap
1024 points
S
S
S
Figure 3- 125: FFT overlap
Real Time S/A Mode
Summary of Contents for WCA200A
Page 6: ......
Page 8: ......
Page 29: ...Getting Started...
Page 30: ......
Page 57: ...Operating Basics...
Page 58: ......
Page 86: ...Functional Overview 2 28 WCA230A WCA280A User Manual...
Page 125: ...Reference...
Page 126: ......
Page 208: ...Modulation Analysis Demod Mode 3 82 WCA230A WCA280A User Manual...
Page 272: ...Setting Timing Parameters 3 146 WCA230A WCA280A User Manual...
Page 346: ...Display Line 3 220 WCA230A WCA280A User Manual...
Page 358: ...Marker Operation and Peak Search 3 232 WCA230A WCA280A User Manual...
Page 388: ...File Format 3 262 WCA230A WCA280A User Manual...
Page 392: ...Screen Copy 3 266 WCA230A WCA280A User Manual...
Page 393: ...Appendices...
Page 394: ......
Page 430: ...Appendix C Digital Demodulation Symbol Mapping C 4 WCA230A WCA280A User Manual...
Page 437: ...Glossary...
Page 438: ......
Page 446: ...Glossary Glossary 8 WCA230A WCA280A User Manual...
Page 447: ...Index...
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