User manual
Table Of Contents
- toc
- General safety summary
- Compliance Information
- Preface
- Getting Started
- Operating Basics
- Understanding Oscilloscope Functions
- Application Examples
- Taking Simple Measurements
- Using Autorange to Examine a Series of Test Points
- Taking Cursor Measurements
- Analyzing Signal Detail
- Capturing a Single-Shot Signal
- Measuring Propagation Delay
- Triggering on a Specific Pulse Width
- Triggering on a Video Signal
- Analyzing a Differential Communication Signal
- Viewing Impedance Changes in a Network
- Data Logging
- Limit Testing
- Math FFT
- USB Flash Drive and Device Ports
- USB Flash Drive Port
- File Management Conventions
- Saving and Recalling Files With a USB Flash Drive
- Using the Save Function of the Print Front Panel Button
- USB Device Port
- Installing the PC Communications Software on a PC
- Connecting to a PC
- Connecting to a GPIB System
- Command Entry
- Connecting to a Printer
- Printing a Screen Image
- Reference
- Appendix A: Specifications
- Appendix B: TPP0101 and TPP0201 Series 10X Passive Probes Inform
- Appendix C: Accessories
- Appendix D: Cleaning
- Appendix E: Default Setup
- Appendix F: Font Licenses
Math FFT
The Math FFT function includes three FFT Window options. There is a trade-off
between
frequency resolution and amplitude accuracy with each type of window.
What you want to measure a nd your source signal characteristics will help you to
determine which window to use.
Window Measur
e
Charac
teristics
Hanning
Perio
dic waveforms
Bette
r frequency, poorer magnitude
accuracy than Flattop
Flatt
op
Periodic waveforms Better magnitude, poorer frequency
accuracy than Hanning
Rectangular Pulses or transients
Special-purpose window for waveforms
tha
t do not have discontinuities. This is
essentially the same as no window
FFT Aliasing
Problems occur when the oscilloscope acquires a time-domain waveform
containing frequency components that are greater than the Nyquist frequency.
(See page 56, Nyquist Frequency.) The frequency components that are above the
Nyquist frequency are undersampled, appearing as lower frequency components
t
hat "fold back" around the Nyquist frequency. These incorrect components are
called aliases.
TBS1000 Series Oscilloscopes User Manual 59