FAST Fourier Transform (FFT) and Digital Filtering Using LabVIEW


 Joseph Carson
 4 years ago
 Views:
Transcription
1 FAST Fourier Transform (FFT) and Digital Filtering Using LabVIEW Wei Lin Department of Biomedical Engineering Stony Brook University Instructor s Portion Summary This experiment requires the student to use LabVIEW to perform signal analysis on the acquired analog signals. Students should be familiar with the Fast Fourier Transform (FFT) and digital filtering using LabVIEW Uses This lecture applies to all courses of virtual instrumentation. Equipment List Computers LabVIEW 8.5 Express NIELVIS benchtop workstation References Lecture Slides of Data Analysis Using LabVIEW VIs from the project Data Acquisition Using NIDAQmx Student s Portion Introduction The students should learn the basic LabVIEW programming techniques for the FFT and digital filtering. They will modify two VIs developed in the 1
2 project Data Acquisition Using NIDAQmx and add frequency spectrum analysis and digital filter in the two VIs. Objectives Theory Perform FFT analysis using LabVIEW Frequency Spectrum Express VI Design and test digital filter using LabVIEW Filter Express VI The Fast Fourier Transform (FFT) and the power spectrum are powerful tools for analyzing and measuring signals from plugin data acquisition (DAQ) devices. It can measure the frequency components within the signal. FFTbased measurement requires digitization of a continuous signal. According to the Nyquist criterion, the sampling frequency, F s, must be at least twice the maximum frequency component in the signal. If this criterion is violated, a phenomenon known as aliasing occurs. When the Nyquist criterion is violated, frequency components above half the sampling frequency appear as frequency components below half the sampling frequency, resulting in an erroneous representation of the signal. This is called frequency aliasing. Therefore, before a signal is digitized, antialiasing filters are used to attenuate the frequency components at and above half the sampling frequency to a level below the dynamic range of the analogtodigital converter (ADC). Spectral leakage is another issue in FFT analysis. It is the result of an assumption in the FFT algorithm that the time record is exactly repeated throughout all time and that signals contained in a time record are thus periodic at intervals that correspond to the length of the time record. If the time record has a nonintegral number of cycles, this assumption is violated and spectral leakage occurs. To alleviate the spectrum leakage, a predefine window function is applied to the signals to be analyzed. Filters alter or remove unwanted frequencies from your signal. Depending on the frequency range that they either pass or attenuate, they can be classified into the following types: A lowpass filter passes low frequencies, but attenuates high frequencies. A highpass filter passes high frequencies, but attenuates low frequencies. A bandpass filter passes a certain band of frequencies. A bandstop filter attenuates a certain band of frequencies. Digital filters have the following advantages over their analog counterparts: 2
3 They are programmable in terms of filter order, cutoff frequencies, and amount of ripple. They are stable and predictable. They do not drift with temperature or humidity and do not require precision components. They have a superior performancetocost ratio. Therefore, it is recommended to use digital filters in instrumentation except for the antialiasing filter. LabVIEW has two express VIs for FFT analysis and digital filtering. They are frequency spectrum express VI and filter express VI. Lab Procedure Experiment 1: Create a LabVIEW application of frequency spectrum analysis: 1. Launch LabVIEW. 2. Load finite data acquisition VI. 3. Add the frequency spectrum VI (Express>Signal Analysis >Spectral). Configure the output of the express VI as linear in result section and set window as None. 4. Connect the waveform data from DAQmx read VI to the signal terminal of the frequency spectrum express VI. 5. Add a graph indicator on the front panel and connect the output (FFT(RMS)) of the frequency spectrum VI (FFT) to the graph. 6. Keep the ELVIS unit off. Connect the output of function generator FUNC OUT to ACH0 using connection wire on the prototype board. 7. Turn ELVIS unit on including the prototype board. 8. Launch ELVIS application and choose function generator. 9. Enter the parameters for the controls of the LabVIEW. Recommended sampling frequency is 1000 Hz and number of samples is Set the frequency, and function type of the signal generator (recommended function: sine wave, frequency 20 Hz. and run the VI and observe the frequency spectrum. In this case, you should collected integer number of cycles of the signal. Therefore, no spectrum leakage is present. 11. Change the signal frequency or the number of samples so that there is a disconnection at the end of the signal (non integer number of cycles collected) and observe the spectrum leakage. 12. You may need to add write Meas file VI to same the signal and the FFT result for your lab report. 13. Save the VI 3
4 Experiment 2, Create a LabVIEW application of digital filter: 1. Use the VI from previous experiment. 2. Add two more graph indictors on the front panel for the filtered signal and the spectrum of the filtered signal. 3. Add a filter express VI (Express>Signal Analysis>Filter) and connect the output from the DAQmx VI to the signal terminal of the filter VI 4. Connect the output of filter to the graph indicator of filtered signal. 5. Add another frequency spectrum express VI (Express>Signal Analysis>Spectral) on the block diagram and connect the filtered signal to its input. 6. Connect the output of the above frequency spectrum express VI to the graph indicator of the filtered signal spectrum. 7. Combine the two dynamic data, the spectrum of the original signal and the spectrum of the filtered signal using signal manipulation VI (Express>Signal Manipulate>merge signals) and connect it to the Write LabVIEW Measurement Data express VI (Express >Output>write meas data). In the wizard, select a. Ask user to choose file b. Ask each iteration c. If a file already exists, overwrite file d. X value columns: one column per channel 8. Run the application and record the results in files. The following are the suggestions for the test of digital filters. a. Use square wave at low frequency, far below the sampling frequency. (20 Hz) b. Change the cutoff frequency of the filter. c. Change the type of filter, e.g. lowpass or highpass. d. Change the order of the filter. (optional) e. Change the topology of the filter. (optional) Experiment 3. (Extra credits): Using FFT to measure the cutoff frequencies of the band pass filter you made in the previous lab. The expected solution will use one or two measurements to estimate the cutoff frequencies instead of using multiple sinusoidal signals. Lab Report 1. Objective. 2. Theory (What it FFT? Filter?) 3. Data: Demonstrate frequency spectrum of the tested signal and filter effects. 4. Due on 11/14/2008 4
5 Reference VIs FFT VI Filter VI 5
Data Acquisition Using NIDAQmx
Instructor s Portion Data Acquisition Using NIDAQmx Wei Lin Department of Biomedical Engineering Stony Brook University Summary This experiment requires the student to use NIDAQmx to acquire voltage
More informationLab 3: Introduction to Data Acquisition Cards
Lab 3: Introduction to Data Acquisition Cards INTRODUCTION: In this lab, you will be building a VI to display the input measured on a channel. However, within your own VI you will use LabVIEW supplied
More informationCell Phone Vibration Experiment
Objective Cell Phone Vibration Experiment Most cell phones are designed to vibrate. But at what frequency do they vibrate? With an accelerometer, data acquisition and signal analysis the vibration frequency
More informationAnalog Filters. A common instrumentation filter application is the attenuation of high frequencies to avoid frequency aliasing in the sampled data.
Analog Filters Filters can be used to attenuate unwanted signals such as interference or noise or to isolate desired signals from unwanted. They use the frequency response of a measuring system to alter
More informationAnalog Representations of Sound
Analog Representations of Sound Magnified phonograph grooves, viewed from above: The shape of the grooves encodes the continuously varying audio signal. Analog to Digital Recording Chain ADC Microphone
More informationchapter Introduction to Digital Signal Processing and Digital Filtering 1.1 Introduction 1.2 Historical Perspective
Introduction to Digital Signal Processing and Digital Filtering chapter 1 Introduction to Digital Signal Processing and Digital Filtering 1.1 Introduction Digital signal processing (DSP) refers to anything
More informationFUNDAMENTALS OF MODERN SPECTRAL ANALYSIS. Matthew T. Hunter, Ph.D.
FUNDAMENTALS OF MODERN SPECTRAL ANALYSIS Matthew T. Hunter, Ph.D. AGENDA Introduction Spectrum Analyzer Architecture Dynamic Range Instantaneous Bandwidth The Importance of Image Rejection and AntiAliasing
More informationAnalog signals are those which are naturally occurring. Any analog signal can be converted to a digital signal.
3.3 Analog to Digital Conversion (ADC) Analog signals are those which are naturally occurring. Any analog signal can be converted to a digital signal. 1 3.3 Analog to Digital Conversion (ADC) WCB/McGrawHill
More informationLab 4  Data Acquisition
Spring 11 Lab 4  Data Acquisition Lab 41 Lab 4  Data Acquisition Format This lab will be conducted during your regularly scheduled lab time in a group format. Each student is responsible for learning
More informationDepartment of Electrical and Computer Engineering BenGurion University of the Negev. LAB 1  Introduction to USRP
Department of Electrical and Computer Engineering BenGurion University of the Negev LAB 1  Introduction to USRP  11 Introduction In this lab you will use software reconfigurable RF hardware from National
More informationLABVIEW DSP TEST TOOLKIT FOR TI DSP
LABVIEW DSP TEST TOOLKIT FOR TI DSP Contents The LabVIEW DSP Test Toolkit for TI DSP uses LabVIEW to automate TI s Code Composer Studio (CCS) Integrated Development Environment (IDE) so you can create
More informationThe Calculation of G rms
The Calculation of G rms QualMark Corp. Neill Doertenbach The metric of G rms is typically used to specify and compare the energy in repetitive shock vibration systems. However, the method of arriving
More informationLecture 16: Noise and Filters
Lecture 16: Noise and Filters Overview 1. Periodic and Aperiodic Signals Review: by periodic signals, we mean signals that have a waveform shape that repeats. The time taken for the waveform to repeat
More informationCHAPTER 6 Frequency Response, Bode Plots, and Resonance
ELECTRICAL CHAPTER 6 Frequency Response, Bode Plots, and Resonance 1. State the fundamental concepts of Fourier analysis. 2. Determine the output of a filter for a given input consisting of sinusoidal
More informationAircraft cabin noise synthesis for noise subjective analysis
Aircraft cabin noise synthesis for noise subjective analysis Bruno Arantes Caldeira da Silva Instituto Tecnológico de Aeronáutica São José dos Campos  SP brunoacs@gmail.com Cristiane Aparecida Martins
More informationIntroduction to Digital Audio
Introduction to Digital Audio Before the development of highspeed, lowcost digital computers and analogtodigital conversion circuits, all recording and manipulation of sound was done using analog techniques.
More informationLab 5 Getting started with analogdigital conversion
Lab 5 Getting started with analogdigital conversion Achievements in this experiment Practical knowledge of coding of an analog signal into a train of digital codewords in binary format using pulse code
More informationGETTING STARTED WITH LABVIEW POINTBYPOINT VIS
USER GUIDE GETTING STARTED WITH LABVIEW POINTBYPOINT VIS Contents Using the LabVIEW PointByPoint VI Libraries... 2 Initializing PointByPoint VIs... 3 Frequently Asked Questions... 5 What Are the
More informationThe Effective Number of Bits (ENOB) of my R&S Digital Oscilloscope Technical Paper
The Effective Number of Bits (ENOB) of my R&S Digital Oscilloscope Technical Paper Products: R&S RTO1012 R&S RTO1014 R&S RTO1022 R&S RTO1024 This technical paper provides an introduction to the signal
More informationLAB 12: ACTIVE FILTERS
A. INTRODUCTION LAB 12: ACTIVE FILTERS After last week s encounter with op amps we will use them to build active filters. B. ABOUT FILTERS An electric filter is a frequencyselecting circuit designed
More informationThree Levels of DataLogging Software from National Instruments
Three Levels of DataLogging Software from National Instruments One of the most common data acquisition applications is simply logging acquired data to disk or a database for future analysis. Most National
More informationSUMMARY. Additional Digital/Software filters are included in Chart and filter the data after it has been sampled and recorded by the PowerLab.
This technique note was compiled by ADInstruments Pty Ltd. It includes figures and tables from S.S. Young (2001): Computerized data acquisition and analysis for the life sciences. For further information
More informationHarmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies
Soonwook Hong, Ph. D. Michael Zuercher Martinson Harmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies 1. Introduction PV inverters use semiconductor devices to transform the
More informationData Acquisition in LabVIEW
Telemark University College Department of Electrical Engineering, Information Technology and Cybernetics Data Acquisition in LabVIEW HANS PETTER HALVORSEN, 2013.08.16 Faculty of Technology, Postboks 203,
More informationManual Analysis Software AFD 1201
AFD 1200  AcoustiTube Manual Analysis Software AFD 1201 Measurement of Transmission loss acc. to Song and Bolton 1 Table of Contents Introduction  Analysis Software AFD 1201... 3 AFD 1200  AcoustiTube
More informationPeakVue Analysis for Antifriction Bearing Fault Detection
August 2011 PeakVue Analysis for Antifriction Bearing Fault Detection Peak values (PeakVue) are observed over sequential discrete time intervals, captured, and analyzed. The analyses are the (a) peak values
More informationANALYZER BASICS WHAT IS AN FFT SPECTRUM ANALYZER? 21
WHAT IS AN FFT SPECTRUM ANALYZER? ANALYZER BASICS The SR760 FFT Spectrum Analyzer takes a time varying input signal, like you would see on an oscilloscope trace, and computes its frequency spectrum. Fourier's
More informationAnalog and Digital Filters Anthony Garvert November 13, 2015
Analog and Digital Filters Anthony Garvert November 13, 2015 Abstract In circuit analysis and performance, a signal transmits some form of information, such as a voltage or current. However, over a range
More informationFFT Frequency Detection on the dspic
FFT Frequency Detection on the dspic by Jac Kersing Nov 2012 Abstract In this article Jac explains how he solved a practical challenge using powerful dspic devices and Fast Fourier Transform algorithms.
More informationNonData Aided Carrier Offset Compensation for SDR Implementation
NonData Aided Carrier Offset Compensation for SDR Implementation Anders Riis Jensen 1, Niels Terp Kjeldgaard Jørgensen 1 Kim Laugesen 1, Yannick Le Moullec 1,2 1 Department of Electronic Systems, 2 Center
More informationSwitch Mode Power Supply Topologies
Switch Mode Power Supply Topologies The Buck Converter 2008 Microchip Technology Incorporated. All Rights Reserved. WebSeminar Title Slide 1 Welcome to this Web seminar on Switch Mode Power Supply Topologies.
More informationMatlab GUI for WFB spectral analysis
Matlab GUI for WFB spectral analysis Jan Nováček Department of Radio Engineering K13137, CTU FEE Prague Abstract In the case of the sound signals analysis we usually use logarithmic scale on the frequency
More informationHideo Okawara s Mixed Signal Lecture Series. DSPBased Testing Fundamentals 46 Perpin Signal Generator
Hideo Okawara s Mixed Signal Lecture Series DSPBased Testing Fundamentals 46 Perpin Signal Generator Advantest Corporation, Tokyo Japan August 2012 Preface to the Series ADC and DAC are the most typical
More informationPHYSICS 360  LAB #2 Passive Lowpass and Highpass Filter Circuits and Integrator and Differentiator Circuits
PHYSICS 360  LAB #2 Passie Lowpass and Highpass Filter Circuits and Integrator and Differentiator Circuits Objectie: Study the behaior of lowpass and highpass filters. Study the differentiator and
More informationTime series analysis Matlab tutorial. Joachim Gross
Time series analysis Matlab tutorial Joachim Gross Outline Terminology Sampling theorem Plotting Baseline correction Detrending Smoothing Filtering Decimation Remarks Focus on practical aspects, exercises,
More informationBasics of Digital Recording
Basics of Digital Recording CONVERTING SOUND INTO NUMBERS In a digital recording system, sound is stored and manipulated as a stream of discrete numbers, each number representing the air pressure at a
More informationSGN1158 Introduction to Signal Processing Test. Solutions
SGN1158 Introduction to Signal Processing Test. Solutions 1. Convolve the function ( ) with itself and show that the Fourier transform of the result is the square of the Fourier transform of ( ). (Hints:
More informationLecture  4 Diode Rectifier Circuits
Basic Electronics (Module 1 Semiconductor Diodes) Dr. Chitralekha Mahanta Department of Electronics and Communication Engineering Indian Institute of Technology, Guwahati Lecture  4 Diode Rectifier Circuits
More informationSIGNAL PROCESSING FOR EFFECTIVE VIBRATION ANALYSIS
SIGNAL PROCESSING FOR EFFECTIVE VIBRATION ANALYSIS Dennis H. Shreve IRD Mechanalysis, Inc Columbus, Ohio November 1995 ABSTRACT Effective vibration analysis first begins with acquiring an accurate timevarying
More informationIntroduction to Digital Filters
CHAPTER 14 Introduction to Digital Filters Digital filters are used for two general purposes: (1) separation of signals that have been combined, and (2) restoration of signals that have been distorted
More informationApplication Report. 1 Introduction. 2 Resolution of an AD Converter. 2.1 SignaltoNoise Ratio (SNR) Harman Grewal... ABSTRACT
Application Report SLAA323 JULY 2006 Oversampling the ADC12 for Higher Resolution Harman Grewal... ABSTRACT This application report describes the theory of oversampling to achieve resolutions greater than
More informationQuanser NIELVIS Trainer (QNET) Series: QNET HVAC. Heating, Ventilation, and Air Conditioning (HVAC) User Manual. User Manual
Quanser NIELVIS Trainer (QNET) Series: QNET HVAC Heating, Ventilation, and Air Conditioning (HVAC) User Manual User Manual Table of Contents 1. Introduction...1 2. Requirements...1 3. References...1 4.
More informationLock  in Amplifier and Applications
Lock  in Amplifier and Applications What is a Lock in Amplifier? In a nut shell, what a lockin amplifier does is measure the amplitude V o of a sinusoidal voltage, V in (t) = V o cos(ω o t) where ω o
More informationSee Horenstein 4.3 and 4.4
EE 462: Laboratory # 4 DC Power Supply Circuits Using Diodes by Drs. A.V. Radun and K.D. Donohue (2/14/07) Department of Electrical and Computer Engineering University of Kentucky Lexington, KY 40506 Updated
More informationAnalog Signal Conditioning
Analog Signal Conditioning Analog and Digital Electronics Electronics Digital Electronics Analog Electronics 2 Analog Electronics Analog Electronics Operational Amplifiers Transistors TRIAC 741 LF351 TL084
More informationCALIBRATION PROCEDURE NI 9219. Contents. Software Requirements. ni.com/manuals
CALIBRATION PROCEDURE NI 9219 Français Deutsch ni.com/manuals Contents This document contains information for calibrating the National Instruments 9219. For more information on calibration, visit ni.com/calibration.
More informationOptimizing IP3 and ACPR Measurements
Optimizing IP3 and ACPR Measurements Table of Contents 1. Overview... 2 2. Theory of Intermodulation Distortion... 2 3. Optimizing IP3 Measurements... 4 4. Theory of Adjacent Channel Power Ratio... 9 5.
More informationPCM Encoding and Decoding:
PCM Encoding and Decoding: Aim: Introduction to PCM encoding and decoding. Introduction: PCM Encoding: The input to the PCM ENCODER module is an analog message. This must be constrained to a defined bandwidth
More informationANIMA: NonConventional Interfaces in Robot Control Through Electroencephalography and Electrooculography: Motor Module
Ninth LACCEI Latin American and Caribbean Conference (LACCEI 2011), Engineering for a Smart Planet, Innovation, Information Technology and Computational Tools for Sustainable Development, August 35, 2011,
More informationCIRCUITS LABORATORY EXPERIMENT 3. AC Circuit Analysis
CIRCUITS LABORATORY EXPERIMENT 3 AC Circuit Analysis 3.1 Introduction The steadystate behavior of circuits energized by sinusoidal sources is an important area of study for several reasons. First, the
More informationImproving A D Converter Performance Using Dither
Improving A D Converter Performance Using Dither 1 0 INTRODUCTION Many analogtodigital converter applications require low distortion for a very wide dynamic range of signals Unfortunately the distortion
More informationSimilar benefits are also derived through modal testing of other space structures.
PAGE 1 OF 5 PREFERRED RELIABILITY PRACTICES MODAL TESTING: MEASURING DYNAMIC STRUCTURAL CHARACTERISTICS Practice: Modal testing is a structural testing practice that provides low levels of mechanical excitation
More informationMeasuring Temperature withthermistors a Tutorial David Potter
NATIONAL INSTRUMENTS The Software is the Instrument Application Note 065 Measuring Temperature withthermistors a Tutorial David Potter Introduction Thermistors are thermally sensitive resistors used in
More informationWorkshop Perceptual Effects of Filtering and Masking Introduction to Filtering and Masking
Workshop Perceptual Effects of Filtering and Masking Introduction to Filtering and Masking The perception and correct identification of speech sounds as phonemes depends on the listener extracting various
More informationEmail: tjohn@mail.nplindia.ernet.in
USE OF VIRTUAL INSTRUMENTS IN RADIO AND ATMOSPHERIC EXPERIMENTS P.N. VIJAYAKUMAR, THOMAS JOHN AND S.C. GARG RADIO AND ATMOSPHERIC SCIENCE DIVISION, NATIONAL PHYSICAL LABORATORY, NEW DELHI 110012, INDIA
More informationWhat the Nyquist Criterion Means to Your Sampled Data System Design. by Walt Kester
TUTORAL What the Nyquist Criterion Means to Your Sampled Data System Design NTRODUCTON by Walt Kester A quick reading of Harry Nyquist's classic Bell System Technical Journal article of 194 (Reference
More informationFrequency Response of Filters
School of Engineering Department of Electrical and Computer Engineering 332:224 Principles of Electrical Engineering II Laboratory Experiment 2 Frequency Response of Filters 1 Introduction Objectives To
More informationPHYS 331: Junior Physics Laboratory I Notes on Noise Reduction
PHYS 331: Junior Physics Laboratory I Notes on Noise Reduction When setting out to make a measurement one often finds that the signal, the quantity we want to see, is masked by noise, which is anything
More informationSignal to Noise Instrumental Excel Assignment
Signal to Noise Instrumental Excel Assignment Instrumental methods, as all techniques involved in physical measurements, are limited by both the precision and accuracy. The precision and accuracy of a
More informationVoiceis analog in character and moves in the form of waves. 3important wavecharacteristics:
Voice Transmission Basic Concepts Voiceis analog in character and moves in the form of waves. 3important wavecharacteristics: Amplitude Frequency Phase Voice Digitization in the POTS Traditional
More informationRF Measurements Using a Modular Digitizer
RF Measurements Using a Modular Digitizer Modern modular digitizers, like the Spectrum M4i series PCIe digitizers, offer greater bandwidth and higher resolution at any given bandwidth than ever before.
More informationLEVERAGING FPGA AND CPLD DIGITAL LOGIC TO IMPLEMENT ANALOG TO DIGITAL CONVERTERS
LEVERAGING FPGA AND CPLD DIGITAL LOGIC TO IMPLEMENT ANALOG TO DIGITAL CONVERTERS March 2010 Lattice Semiconductor 5555 Northeast Moore Ct. Hillsboro, Oregon 97124 USA Telephone: (503) 2688000 www.latticesemi.com
More informationCBS RECORDS PROFESSIONAL SERIES CBS RECORDS CD1 STANDARD TEST DISC
CBS RECORDS PROFESSIONAL SERIES CBS RECORDS CD1 STANDARD TEST DISC 1. INTRODUCTION The CBS Records CD1 Test Disc is a highly accurate signal source specifically designed for those interested in making
More informationLab #9: AC Steady State Analysis
Theory & Introduction Lab #9: AC Steady State Analysis Goals for Lab #9 The main goal for lab 9 is to make the students familar with AC steady state analysis, db scale and the NI ELVIS frequency analyzer.
More informationMATRIX TECHNICAL NOTES
200 WOOD AVENUE, MIDDLESEX, NJ 08846 PHONE (732) 4699510 FAX (732) 4690418 MATRIX TECHNICAL NOTES MTN107 TEST SETUP FOR THE MEASUREMENT OF XMOD, CTB, AND CSO USING A MEAN SQUARE CIRCUIT AS A DETECTOR
More informationComputer Networks and Internets, 5e Chapter 6 Information Sources and Signals. Introduction
Computer Networks and Internets, 5e Chapter 6 Information Sources and Signals Modified from the lecture slides of Lami Kaya (LKaya@ieee.org) for use CECS 474, Fall 2008. 2009 Pearson Education Inc., Upper
More informationHandsonIntroduction todataacquisition
ni.com/events HandsonIntroduction todataacquisition withlabview ni.com/uk ni.com/ireland ni.com/uk/handson Introduction to LabVIEW and ComputerBased Measurements HandsOn Seminar 1 Company Profile Leaders
More informationDIGITALTOANALOGUE AND ANALOGUETODIGITAL CONVERSION
DIGITALTOANALOGUE AND ANALOGUETODIGITAL CONVERSION Introduction The outputs from sensors and communications receivers are analogue signals that have continuously varying amplitudes. In many systems
More informationMaximizing Receiver Dynamic Range for Spectrum Monitoring
Home Maximizing Receiver Dynamic Range for Spectrum Monitoring Brian Avenell, National Instruments Corp., Austin, TX October 15, 2012 As consumers continue to demand more data wirelessly through mobile
More informationWhat you will do. Build a 3band equalizer. Connect to a music source (mp3 player) Low pass filter High pass filter Band pass filter
Audio Filters What you will do Build a 3band equalizer Low pass filter High pass filter Band pass filter Connect to a music source (mp3 player) Adjust the strength of low, high, and middle frequencies
More informationVibration analysis and monitoring Compact. Powerful. Modern technology.
Vibration analysis and monitoring Compact. Powerful. Modern technology. Maximum performance Vibration measurement with state of the art processor technology Expert Vibro is Delphin Technology's new device
More informationImpedance 50 (75 connectors via adapters)
VECTOR NETWORK ANALYZER PLANAR TR1300/1 DATA SHEET Frequency range: 300 khz to 1.3 GHz Measured parameters: S11, S21 Dynamic range of transmission measurement magnitude: 130 db Measurement time per point:
More informationThe front end of the receiver performs the frequency translation, channel selection and amplification of the signal.
Many receivers must be capable of handling a very wide range of signal powers at the input while still producing the correct output. This must be done in the presence of noise and interference which occasionally
More informationGetting Started with the LabVIEW Mobile Module
Getting Started with the LabVIEW Mobile Module Contents The LabVIEW Mobile Module extends the LabVIEW graphical development environment to Mobile devices so you can create applications that run on Windows
More informationMotorola Digital Signal Processors
Motorola Digital Signal Processors Principles of SigmaDelta Modulation for Analogto Digital Converters by Sangil Park, Ph. D. Strategic Applications Digital Signal Processor Operation MOTOROLA APR8
More informationDAQ in MATLAB HANSPETTER HALVORSEN, 2012.09.11
Telemark University College Department of Electrical Engineering, Information Technology and Cybernetics DAQ in MATLAB HANSPETTER HALVORSEN, 2012.09.11 Faculty of Technology, Postboks 203, Kjølnes ring
More informationAnalysis/resynthesis with the short time Fourier transform
Analysis/resynthesis with the short time Fourier transform summer 2006 lecture on analysis, modeling and transformation of audio signals Axel Röbel Institute of communication science TUBerlin IRCAM Analysis/Synthesis
More informationSECTION 6 DIGITAL FILTERS
SECTION 6 DIGITAL FILTERS Finite Impulse Response (FIR) Filters Infinite Impulse Response (IIR) Filters Multirate Filters Adaptive Filters 6.a 6.b SECTION 6 DIGITAL FILTERS Walt Kester INTRODUCTION Digital
More informationA DESIGN OF DSPIC BASED SIGNAL MONITORING AND PROCESSING SYSTEM
ISTANBUL UNIVERSITY JOURNAL OF ELECTRICAL & ELECTRONICS ENGINEERING YEAR VOLUME NUMBER : 2009 : 9 : 1 (921927) A DESIGN OF DSPIC BASED SIGNAL MONITORING AND PROCESSING SYSTEM Salih ARSLAN 1 Koray KÖSE
More informationA remote diagnostics system for the MERLIN array. D. Kettle, N.Roddis Jodrell Bank Observatory University of Manchester Macclesfield SK11 9DL
A remote diagnostics system for the MERLIN array D. Kettle, N.Roddis Jodrell Bank Observatory University of Manchester Macclesfield SK11 9DL 1. Introduction Jodrell Bank Observatory operates an array of
More informationDithering in Analogtodigital Conversion
Application Note 1. Introduction 2. What is Dither Highspeed ADCs today offer higher dynamic performances and every effort is made to push these stateofthe art performances through design improvements
More informationSophomore Physics Laboratory (PH005/105)
CALIFORNIA INSTITUTE OF TECHNOLOGY PHYSICS MATHEMATICS AND ASTRONOMY DIVISION Sophomore Physics Laboratory (PH5/15) Analog Electronics Active Filters Copyright c Virgínio de Oliveira Sannibale, 23 (Revision
More informationBasics of Simulation Technology (SPICE), Virtual Instrumentation and Implications on Circuit and System Design
Basics of Simulation Technology (SPICE), Virtual Instrumentation and Implications on Circuit and System Design Patrick Noonan Business Development Manager National Instruments Electronics Workbench Group
More informationLabVIEW Day 1 Basics. Vern Lindberg. 1 The Look of LabVIEW
LabVIEW Day 1 Basics Vern Lindberg LabVIEW first shipped in 1986, with very basic objects in place. As it has grown (currently to Version 10.0) higher level objects such as Express VIs have entered, additional
More informationEvaluating Oscilloscope Sample Rates vs. Sampling Fidelity
Evaluating Oscilloscope Sample Rates vs. Sampling Fidelity Application Note How to Make the Most Accurate Digital Measurements Introduction Digital storage oscilloscopes (DSO) are the primary tools used
More informationLab 1: The Digital Oscilloscope
PHYSICS 220 Physical Electronics Lab 1: The Digital Oscilloscope Object: To become familiar with the oscilloscope, a ubiquitous instrument for observing and measuring electronic signals. Apparatus: Tektronix
More informationH/L = Power supply. FN = Nominal Frequency. RN = Rated value of output burden. UN = Nominal input voltage. IN = Nominal input current.
Application : The transducer RISH CON  CA/CV (Fig.1) converts a sinusoidal AC Current or AC Voltage into a load independent DC Current or a load independent DC Voltage proportional to the measured value.
More information1995 MixedSignal Products SLAA013
Application Report 995 MixedSignal Products SLAA03 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service
More informationFilter Comparison. Match #1: Analog vs. Digital Filters
CHAPTER 21 Filter Comparison Decisions, decisions, decisions! With all these filters to choose from, how do you know which to use? This chapter is a headtohead competition between filters; we'll select
More informationLabVIEW DSP Test Integration Toolkit for TI DSP
LabVIEW DSP Test Integration Toolkit for TI DSP Contents The LabVIEW DSP Test Integration Toolkit for TI DSP gives you the ability to use LabVIEW and the TI Code Composer Studio (CCS) Integrated Development
More informationThe Fourier Analysis Tool in Microsoft Excel
The Fourier Analysis Tool in Microsoft Excel Douglas A. Kerr Issue March 4, 2009 ABSTRACT AD ITRODUCTIO The spreadsheet application Microsoft Excel includes a tool that will calculate the discrete Fourier
More informationCHAPTER 3: DIGITAL IMAGING IN DIAGNOSTIC RADIOLOGY. 3.1 Basic Concepts of Digital Imaging
Physics of Medical XRay Imaging (1) Chapter 3 CHAPTER 3: DIGITAL IMAGING IN DIAGNOSTIC RADIOLOGY 3.1 Basic Concepts of Digital Imaging Unlike conventional radiography that generates images on film through
More informationQUICK START GUIDE FOR DEMONSTRATION CIRCUIT 956 24BIT DIFFERENTIAL ADC WITH I2C LTC2485 DESCRIPTION
LTC2485 DESCRIPTION Demonstration circuit 956 features the LTC2485, a 24Bit high performance Σ analogtodigital converter (ADC). The LTC2485 features 2ppm linearity, 0.5µV offset, and 600nV RMS noise.
More informationT = 1 f. Phase. Measure of relative position in time within a single period of a signal For a periodic signal f(t), phase is fractional part t p
Data Transmission Concepts and terminology Transmission terminology Transmission from transmitter to receiver goes over some transmission medium using electromagnetic waves Guided media. Waves are guided
More informationI2C PRESSURE MONITORING THROUGH USB PROTOCOL.
I2C PRESSURE MONITORING THROUGH USB PROTOCOL. Product Details: To eradicate human error while taking readings such as upper precision or lower precision Embedded with JAVA Application: Technology Used:
More informationServo Motors (SensorDAQ only) Evaluation copy. Vernier Digital Control Unit (DCU) LabQuest or LabPro power supply
Servo Motors (SensorDAQ only) Project 7 Servos are small, relatively inexpensive motors known for their ability to provide a large torque or turning force. They draw current proportional to the mechanical
More informationLab 1. The Fourier Transform
Lab 1. The Fourier Transform Introduction In the Communication Labs you will be given the opportunity to apply the theory learned in Communication Systems. Since this is your first time to work in the
More informationMultiplexing and Sampling Theory
Multiplexing and Sampling Theory THE ECONOMY OF MULTIPLEXING SampledData Systems An ideal data acquisition system uses a single ADC for each measurement channel. In this way, all data are captured in
More informationHow to Design 10 khz filter. (Using Butterworth filter design) Application notes. By Vadim Kim
How to Design 10 khz filter. (Using Butterworth filter design) Application notes. By Vadim Kim This application note describes how to build a 5 th order low pass, high pass Butterworth filter for 10 khz
More informationDIODE CIRCUITS LABORATORY. Fig. 8.1a Fig 8.1b
DIODE CIRCUITS LABORATORY A solid state diode consists of a junction of either dissimilar semiconductors (pn junction diode) or a metal and a semiconductor (Schottky barrier diode). Regardless of the type,
More information