Related Manuals for Tektronix TDS3FFT
Summary of Contents for Tektronix TDS3FFT
- Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) User Manual TDS3FFT FFT Application Module 071-0349-01 *P071034901* 071034901...
- Page 2 Copyright © Tektronix, Inc. All rights reserved. WARRANTY SUMMARY Tektronix warrants that the products that it manufactures and Tektronix products are covered by U.S. and foreign patents, sells will be free from defects in materials and workmanship issued and pending. Information in this publication supercedes for a period of one (1) year from the date of shipment from an that in all previously published material.
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Page 3: Table Of Contents
FFT Windows ......contact your local Tektronix distributor or sales Aliasing . -
Page 4: Safety Summary
Safety Summary Handle Components Carefully. Do not slide sensitive components over any surface. Do not touch exposed To avoid potential hazards, use this product only as connector pins. Handle sensitive components as little as specified. While using this product, you may need to possible. -
Page 5: Installing The Tds3Fft Application Module
Installing the TDS3FFT Application Module Refer to the TDS3000 & TDS3000B Series Application Module Installation Instructions for instructions on installing and testing the application module. Introduction The FFT application module adds FFT (Fast Fourier Transform) measurement capabilities to your oscillo- scope. -
Page 6: Fft Features
FFT Features Time Signals and FFT Waveforms Displayed Together The time signals and FFT waveforms can be shown The FFT application module provides the following together on the display. The time signal highlights the features: problem; the FFT waveform helps you determine the cause of the problem. -
Page 7: Fft Math Menu
H Signals that have a DC component or offset can cause FFT Math Menu incorrect FFT waveform component magnitude values. To minimize the DC component, choose AC Bottom Side Description Coupling on the source signal. Set FFT Sets the FFT signal source. H To reduce random noise and aliased components in Source to Valid input sources are Ch 1... - Page 8 FFT Vertical Scale Key Points Zooming an FFT Display. Use the Zoom button H Push the side menu button to select a scale. Available along with horizontal POSITION and SCALE controls, to magnify FFT waveforms. When you change the zoom scales are dBV RMS and Linear RMS.
- Page 9 FFT Windows FFT Window Characteristics Best for measuring Blackman- Best magnitude, Predominantly single fre- Applying a window function to the source waveform Harris worst at resolving quency waveforms to look record changes the waveform so that the start and stop frequencies.
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Page 10: Aliasing
Aliasing If the increased number of frequency components shown on the screen makes it difficult to measure Problems occur when the oscilloscope acquires a signal individual components, use the Zoom button to containing frequency components that are greater than magnify the FFT waveform. the Nyquist frequency (1/2 the sample rate). -
Page 11: Fft Examples
FFT Examples FFT Example 1 A pure sine wave can be input into an amplifier to measure distortion; any amplifier distortion will introduce harmonics in the amplifier output. Viewing the FFT of the output can determine if low-level distortion is present. - Page 12 FFT Example 2 Noise in mixed digital/analog circuits can be easily observed with an oscilloscope. However, identifying the sources of the observed noise can be difficult. The FFT waveform displays the frequency content of the noise; you may then be able to associate those frequen- cies with known system frequencies, such as system clocks, oscillators, read/write strobes, display signals, or switching power supplies.
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