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6000 Series Oscilloscope User’s Guide
5
Making Measurements
FFTs ability to resolve two closely space frequencies. A good
way to test the ability of the FFT to resolve two closely
spaced frequencies is to examine the sidebands of an
amplitude modulated sine wave.
For the best vertical accuracy on peak measurements:
•
Make sure the probe attenuation is set correctly. The
probe attenuation is set from the Channel menu if the
operand is a channel.
•
Set the source sensitivity so that the input signal is near
full screen, but not clipped.
•
Use the Flat Top window.
•
Set the FFT sensitivity to a sensitive range, such as
2 dB/division.
For best frequency accuracy on peaks:
•
Use the Hanning window.
•
Use Cursors to place an X cursor on the frequency of
interest.
•
Adjust frequency span for better cursor placement.
•
Return to the Cursors menu to fine tune the X cursor.
For more information on the use of FFTs please refer to
Agilent Application Note 243, ”The Fundamentals of Signal
Analysis” at
http://cp.literature.agilent.com/litweb/pdf/5952-8898E.pdf
Additional information can be obtained from Chapter 4 of
the book “Spectrum and Network Measurements” by Robert
A. Witte.
Summary of Contents for InfiniiVision DSO6014L
Page 2: ...Agilent Technologies Agilent 6000 Series Oscilloscopes User s Guide...
Page 59: ...58 6000 Series Oscilloscope User s Guide 1 Getting Started...
Page 109: ...108 6000 Series Oscilloscope User s Guide 2 Front Panel Controls...
Page 125: ...124 6000 Series Oscilloscope User s Guide 3 Viewing and Measuring Digital Signals...
Page 251: ...250 6000 Series Oscilloscope User s Guide 5 Making Measurements...
Page 287: ...286 6000 Series Oscilloscope User s Guide 6 Displaying Data Interpreting Decoded LIN Data...
Page 321: ...320 6000 Series Oscilloscope User s Guide 7 Saving and Printing Data...
Page 370: ......
