User Manual
Table Of Contents
- toc
- Important safety information
- Compliance information
- Preface
- Installation
- Before Installation
- Operating Considerations
- Connecting Probes
- Securing the Oscilloscope
- Powering on the Oscilloscope
- Powering off the Oscilloscope
- Functional Check
- Compensating a TPP0250, TPP0500B or TPP1000 Passive Voltage Prob
- Compensating a non-TPP0250, non-TPP0500B or non-TPP1000 Passive
- Application Module Free Trial
- Installing an Application Module
- Upgrading Bandwidth
- Changing the Language of the User Interface or Keyboard
- Changing the Date and Time
- Signal Path Compensation
- Upgrading Firmware
- Connecting Your Oscilloscope to a Computer
- Connecting a USB Keyboard to Your Oscilloscope
- Get Acquainted with the Instrument
- Acquire the Signal
- Setting Up Analog Channels
- Using the Default Setup
- Using Autoset
- Acquisition Concepts
- Using FastAcq
- How the Analog Acquisition Modes Work
- Changing the Acquisition Mode, Record Length, and Delay Time
- Using Roll Mode
- Act on Event
- Setting Up a Serial or Parallel Bus
- Setting Up Digital Channels
- When and Why to Turn On MagniVu
- Using MagniVu
- Setting Up the RF Inputs
- Trigger Setup
- Display Waveform or Trace Data
- Adding and Removing a Waveform
- Setting the Display Style and Persistence
- Setting Waveform Intensity
- Scaling and Positioning a Waveform
- Setting Input Parameters
- Positioning and Labeling Bus Signals
- Positioning, Scaling, and Grouping Digital Channels
- Viewing Digital Channels
- Annotating the Screen
- Viewing the Trigger Frequency
- Displaying the Frequency Domain Menu
- Analyze Waveform or Trace Data
- Using Markers in the Frequency Domain
- Taking Automatic Measurements in the Time Domain
- Selecting Automatic Measurements in the Time Domain
- Customizing an Automatic Measurement in the Time Domain
- Taking Automatic Measurements in the Frequency Domain
- Taking Digital Voltmeter Measurements
- Taking Manual Measurements with Cursors
- Setting Up a Histogram
- Using Math Waveforms
- Using FFT
- Using Advanced Math
- Using Spectrum Math
- Using Reference Waveforms and Traces
- Using Wave Inspector to Manage Long Record Length Waveforms
- Auto-magnify
- Limit and Mask Testing
- Making Video Tests
- Making Automated Power Measurements
- Save and Recall Information
- Use the Arbitrary Function Generator
- Use the Application Modules
- Appendix A: Warranted Specifications
- Appendix B: TPP0250, TPP0500B and TPP1000: 250€MHz, 500€MHz and
- Appendix C: P6316 General-Purpose Logic Probe Information
- Appendix D: OpenSSL License
Analyze Wavefor
morTraceData
7. The FFT will app
ear on the display.
Quick Tips
Use short record lengths for faster instrument response.
Use long record lengths to lower the noise relative to the signal and increase the frequency resolution.
If desired, use the zoom feature along with the horizontal Position and Scale controls to magnify and position the
FFT waveform.
Use the default dBV RMS scale to see a detailed view of multiple frequencies, even if they have very different amplitudes.
Use the l
inear RMS scale to see an overall view of how all frequencies compare to each other.
The math
FFT feature provides four windows. Each offers a trade-off between frequency resolution and magnitude
accuracy. The choice of which window to use depends upon what you want to measure and your source’s signal
characteristics. Use the following guidelines to select the best window:
Description Window
Rectan
gular
The frequency resolution when using the Rectangular (a.k.a. boxcar or none) window is very
good, the spectral leakage is high, and amplitude accuracy is poor.
Use th
e Rectangular window for measuring transients or bursts where the signal levels
before and after the event are nearly equal. Also, use this window for equal-amplitude sine
waves with frequencies that are very close together, and for broadband random noise with a
rela
tively slow varying spectrum. This window is the best type for measuring the frequency
spectrum of non-repetitive signals, and measuring frequency components near DC.
Hamm
ing
The frequency resolution when using the Hamming window is good (slightly better than
Hanning), the spectral leakage is moderate, and amplitude accuracy is fair.
Use
the H amming window for measuring sine, periodic, and narrow band random noise. This
window works well on transients or bursts where the signal levels before and after the event
are significantly different.
144 MDO3000 Series Oscilloscopes User Manual