Dissertations / Theses: 'Oscilloscopes'

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Smith, Andrew James Alan. "Fast waveform metrology : generation, measurement and application of sub-picosecond electrical pulses." Thesis, University College London (University of London), 1996. http://discovery.ucl.ac.uk/1349613/.

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This thesis describes work performed at the National Physical Laboratory to improve the electrical risetime calibration of instruments such as fast sampling oscilloscopes. The majority of the work can be divided into four sections: development of an ultrafast optoelectronic pulse generator; measurement of fast electrical pulses with an electrooptic sampling system; de-embedding of transmission line and transition effects as measured at different calibration reference planes; and calibration of an oscilloscope. The pulse generator is a photoconductive switch based on low-temperature Gallium Arsenide, which has a very fast carrier recombination time. Sub-picosecond electrical pulses are produced by illuminated a planar switch with 200 fs optical pulses from a Ti: sapphire laser system. The pulses are measured using a sampling system with an external electro-optic probe in close proximity to the switch. The electro-optic sampling system, with a temporal resolution better than 500 fs, is used to measure the electrical pulses shape at various positions along the planar transmission line. The results are compared to a pulse propagation model for the line. The effects of different switch geometries are examined. Although the pulse generator produces sub-picosecond pulses near to the point of generation, the pulse is shown to broaden to 7 ps after passing along a length of transmission line and a coplanar-coaxial transition. For a sampling oscilloscope with a coaxial input connector, this effect is significant. Frequency-domain measurements with a network analyser, further electro-optic sampling measurements, and the transmission line model are combined to find the network transfer function of the transition. Using the pulse generator, the electro-optic sampling system and the transition knowledge, a 50 GHz sampling oscilloscope is calibrated. The determination of the instrument step response(nominal risetime 7 ps) is improved from an earlier value of 8.5 -3.5 / +2.9 ps to a new value of 7.4 -2.1 / +1.7 ps with the calibration techniques described.

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Blouin, Jean. "Etude et réalisation d'une caméra de télévision destinée au traitement des signaux enregistré sur un oscilloscope rapide." Bordeaux 1, 1986. http://www.theses.fr/1986BOR10608.

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Etude et realisation d'une camera de television destinee au traitement des signaux analogiques rapides (10ns) par l'enregistrement de leur image sur l'ecran d'un oscilloscope rapide performant. L'accumulation et la correlation de ces signaux sont realises au moyen d'un microprocesseur mc 68000

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Clavel-Marinacce, Jacqueline. "Rôle et place de l'appareil de mesure dans l'apprentissage à propos d'un ensemble de concepts en électrocinétique." Lyon 1, 1997. http://www.theses.fr/1997LYO10310.

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Nous avons analyse le role et la place d'un instrument de mesure au cours d'un apprentissage. Notre choix s'est porte sur l'oscilloscope. En effet cet instrument nous parait pouvoir mettre en relation plusieurs aspects du champ experimental et de la theorie, et donc jouer un role essentiel dans la construction des connaissances en electrocinetique, plus precisement dans l'apprentissage des notions de tension et d'intensite et de leurs relations. Nous avons opere en trois temps. Dans un premier temps, essentiel pour nous, nous avons bati pour un binome une situation experimentale ou le seul instrument de mesure est l'oscilloscope. Notre question essentielle est celle-ci : est-ce que l'appareil de mesure joue bien un role essentiel d'intermediaire entre l'apprenant et les objets observes, permettant des allers et venues variees entre trois poles, le champ experimental, l'appareil de mesure que nous avons appelle medium, point milieu, intermediaire, et les theories et modeles en cours d'edification de l'apprenant, et donc en quoi le role du medium est-il interessant pour la construction des connaissances en electrocinetique ? dans un deuxieme temps, nous avons elabore un questionnaire, tout d'abord afin de verifier la pertinence de notre questionnement ; d'autre part dans la mesure ou les reponses aux questions posees devaient etre justifiees, nous esperions, en analysant les reponses, enrichir le domaine des conceptions en electrocinetique. Enfin, signalons que dans un bref troisieme temps, pour confirmer certaines remarques faites dans nos analyses sur le role de l'appareil de mesure, mais aussi sur la collaboration entre pairs, nous avons propose le questionnaire a trois dyades.

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Tulchak, L. V., A. S. Alieksieienko, Л. В. Тульчак, and А. С. Алєксєєнко. "Oscilloscope in science and engineering." Thesis, Вінницький національний аграрний університет, 2015. http://ir.lib.vntu.edu.ua/handle/123456789/7680.

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An oscilloscope, previously called an oscillograph, and informally known as a scope, CRO (for cathode-ray oscilloscope), or DSO (for the more modern digital storage oscilloscope), is a type of electronic test instrument that allows observation of constantly varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time. Non-electrical signals (such as sound or vibration) can be converted to voltages and displayed

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Pellevrault, Sébastien. "Contribution à l’optimisation de transmissions optiques ultra haut débit à 40 Gb/s." Paris 11, 2008. http://www.theses.fr/2008PA112262.

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Une méthode originale (appelé méthode OTE) d’extraction du Taux d'Erreur Binaire (TEB) pour les systèmes de télécommunications sur fibres optiques amplifiées à Ultra Haut débit (40 Gb/s) est développée. Ce travail s’inscrit dans le cadre du projet CARRIOCAS réalisant un réseau expérimental à 40 Gb/s. Un banc expérimental de caractérisation de liaisons optiques à 40 Gb/s a été développé à cet effet. La méthode OTE est basée sur une analyse statistique à partir des formes d’ondes échantillonnées d’un signal pseudoaléatoire (PRBS) obtenues avec un oscilloscope haute fréquence. La statistique utilisée prend en compte le bruit ASE des amplificateurs optiques EDFA (bruit Chi² non-centré) et le bruit du photorécepteur (bruit Gaussien). La gigue de phase aléatoire et les interférences entre symboles (ISI) sont aussi intégrées. Les performances de la méthode OTE ont été évaluées numériquement. La méthode OTE permet de mesurer plus rapidement les TEB très faibles (inférieurs à 10-12) que la mesure directe de comptage des erreurs. Cette méthode permet d’obtenir, rapidement, les figures dérivées du TEB telles que les contours du TEB ou encore la courbe de Bathtub. La validation expérimentale a été faite sur le banc de mesure du TEB jusqu’à 43. 2 Gb/s. Cette méthode a aussi été testée sur les modulateurs du projet CARRIOCAS, ainsi que sur des modules VCSEL à 2. 5 Gb/s utilisant des fibres multimodes, montrant ainsi la généralité de l’approche
An original equivalent Bit-Error-Rate (BER) extraction method (named ETO method) is developed for amplified, ultra high bit rate (40 Gb/s), high quality optical communication systems. This work was undertaken in the framework of the CARRIOCAS project which develops a 40 Gb/s experimental network. An experimental 40 Gb/s optical links caracterisation setup was developed for validation of the method. The ETO method is based on the statistical analysis of pseudorandom (PRBS) data waveforms sampled by a high frequency oscilloscope. The statistical analysis takes into account the ASE noise from the optical amplifier (Chi-square statistics) and the photoreceiver noise (Gaussian noise). Random Jitter and Inter-Symbol-Interference are also considered. Our method is faster for very low BER (less than than 10-12), than the direct measurement method of error counting. This method enables to derive the BER associated figures such as the BER contour or the bathtub curves up to 100 times faster than traditional methods. Good agreement in BER results with the direct BER counting method is verified experimentally up to 43. 2 Gb/s. The method has been successfully tested on CARRIOCAS modulators and on 2. 5 Gb/s VCSELs systems with multimodes fibers. These tests show the generality of the ETO method

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Jin, Stone Qiaodan (Qiaodan Jordan). "An ARM-based sequential sampling oscilloscope." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/100591.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 141).
Sequential equivalent-time sampling allows a system to acquire repetitious waveforms with frequencies beyond the Nyquist rate. This thesis documents the prototype of a digital ARM-based sequential sampling oscilloscope with peripheral hardware and software. Discussed are the designs and obstacles of various analog circuits and signal processing methods. By means of sequential sampling, alongside analog and digital signal processing techniques, we are able to utilize a 3MSPS ADC for a capture rate of 24MSPS. For sinusoids between 6-12MHz, waveforms acquired display at least 10dB of SNR improvement for unfiltered signals and at least 60dB of SNR improvement for aggressively filtered signals.
by Qiaodan (Jordan) Jin Stone.
M. Eng.

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Stavström, Marcus. "Evaluation of FPGA based Test Systems." Thesis, Linköpings universitet, Datorteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119094.

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This master thesis report covers an investigation of how FPGA based hardware can be used to create customizable measurement instruments, for test of electrical equipment in JAS 39 Gripen. The investigation is done at Saab Support and Services in Arboga. Electrical equipment are gradually replacing functions, which previously have been obtained by other systems, in safety critical environments. Since the functions are safety critical, they require regular testing in order to verify proper operation. The aircraft JAS 39 Gripen, which is manufactured and developed by Saab, is an example of such system. Proper operation of the avionics in it are essential in order to maintain flying safety. There already exist systems today that can verify the functionality of electronics in JAS 39 Gripen. However, there are a number of scenarios where those test systems are somewhat inflexible. More flexible test systems are often desired. This flexibility can be obtained by using congurable hardware, suggestively with FPGAs. This approach is investigated in this master thesis.

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Lau, Anthony Kwok. "A digital oscilloscope and spectrum analyzer for anaysis of primate vocalizations : master's research project report." Scholarly Commons, 1989. https://scholarlycommons.pacific.edu/uop_etds/2177.

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The major objective of this report is to present information regarding the design, construction, and testing of the Digital Oscilloscope Peripheral which allows the IBM Personal Computer (IBM PC) to be used as both a digital oscilloscope and a spectrum analyzer. The design and development of both hardware and software are described briefly; however, the test results are analyzed and discussed in great detail. All documents including the circuit diagrams, program flowcharts and listings, and user manual are provided in the appendices for reference. Several different products are referred to in this report; the following lists each one and its respective company: IBM, XT, AT, and PS/2 are registered trademarks of International Business; Machines Corporation.; MS-DOS is a registered trademark of Microsoft Corporation.; and Turbo Basic is a registered trademark of Borland International, Inc.

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Flek, Tomáš. "Meřicí přípravek připojitelný přes rozhraní USB." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218954.

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In essence, this master’s thesis focuses on search and project on optimal electrical scheme, which will substitute for digital oscilloscope function. The thesis consist of three parts, first part is about problems associated with oscilloscope signal sampling and data bus descriptions, second part where are selected particular circuits, electrical scheme, eventually shown different options which could be used. Third part consists of software function description developed for controlling microprocessor. In choosing of analog devices, are focused on parameters like maximal input voltage on which the device has most ideal parameters, but also parameters, which are critical for particular block, like for example input impedance, device noise, operating amplifier input voltage and current offset. All devices were chosen with battery supply possibility, so what the lowest possible power consumption. In this thesis is theoretically described each circuit block and reasons for their selection.

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Blouin, Jean. "Etude et réalisation d'une caméra de télévision destinée au traitement des signaux enregistrés sur un oscilloscope rapide." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375960909.

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David, Jan. "Víceúčelové měřicí zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242178.

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This thesis describes the design of portable multi-purpose measuring device with Microcontrollers from Microchip running on battery power, for displaying the measured signal uses a graphical LCD with a resolution of 240x128. The device is equipped with an oscilloscope and multimeter with auto range.

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Kočík, Karol. "Modul osciloskopu s bezdrátovým přenosem dat." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221279.

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The aim of the thesis is the design and realization of the oscilloscope module with wireless data transfer. One part of the thesis is a short overview of the different types of AD converters. The main part is focused on the hardware configuration that allows modification of the wireless module of the oscilloscope, and the possibility of using in the industrial zone. The design takes into account reducing of consumption and EMC compatibility.

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Badenhorst, J. "Metrology and modelling of high frequency probes." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/808.

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Kulig, Tomáš. "Realizace digitálního osciloskopu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219164.

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This work is focused to digital handheld oscilloscope. Input circuits are solved by analog devices. DSP (Texas Instruments company) will be used for fast processing of signals from output A/D convertors. LCD display with touch screen is used for interaction with user. The result will be fully functional device. It would measure voltage waveforms within the scope from tens mV to tens V with transmission bandwith from direct-current signal up to tens of MHz

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Гриненко, Віталій Вікторович, Виталий Викторович Гриненко, Vitalii Viktorovych Hrynenko, and А. В. Любко. "Багатофункціональний осцилографа-аналізатор з генератором сигналів довільної форми." Thesis, Сумський державний університет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/41239.

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Під час перевірки і налагодження пристроїв для відображення форми сигналу та відслідковування зміни цифрового сигналу у часі використовують осцилографи та аналізатори, які дозволяють спостерігати за зміною декількох цифрових сигналів одночасно.

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Arm, Jakub. "Aplikace v OS Android pro Tiny6410 SDK." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220896.

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This thesis aims generally at getting positives and negatives of popular operating system Android running on development kit Tiny6410 which is a part of FriendlyARM family. The operating system and development kit are designed to be used in user multimedia embedded applications with communication features. The goal of this thesis is to take a look on this framework and to measure main parameters of the operating system, specifically to measure switching context time and time for allocation and operation of memory block. Next goal is to create user application which will control and monitor connected oscilloscope DSO-2150 by Hantek via USB interface. This application will also demonstrate positives and negatives of all programming enviroments, which are available, for user application development with consideration of their optimal use.

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Vařeka, Libor. "Design univerzálního motortesteru pro autoservis." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227967.

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The aim of this dissertation is to focus on the systems design of a multi purpose engine tester, a device for diagnostic techniques of self propelled motor vehicles to be used in a car mechanics work shop. The principle aim is to combine a permanently installed PC, a portable laptop and a workshop trolley containing all the necessary assembly tools and accessories. These three pieces used together will serve as a self contained unit within the workshop. I will compare the quality of the devices with others on the market. I will talk about the layout of the individual parts such as the design, structure and shape of the unit, as well as the ergonomics of the designed pieces. An important factor will be reducing the size of the device without compromising the quality and keeping it a similar price to other similar products on the market.

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Bilík, Petr. "Virtuální měřicí přístroje pro podporu výuky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442484.

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This diploma thesis deals with the creation of the Virtual Measuring Instruments web application. This tool mainly enables us to simulate the real measuring instruments widely used in the laboratories of FEEC BUT. It is intended to serve students for initial acquaintance with specific devices. The theoretical part is focused on the research into the web applications programming and suitable programming languages to implement the proposed application are selected. Furthermore, the specific virtualized devices are described. The result of the experimental part consists in creating a universal application interface to extend the proposed application with other devices. Finally, the specific tests of the developed platform are presented.

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Forsgren, Niklas. "Sampling Ocsilloscope On-Chip." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1563.

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Signal-integrity degradation from such factors as supply and substrate noise and cross talk between interconnects restricts the performance advances in Very Large Scale Integration (VLSI). To avoid this and to keep the signal-integrity, accurate measurements of the on-chip signal must be performed to get an insight in how the physical phenomenon affects the signals.

High-speed digital signals can be taken off chip, through buffers that add delay. Propagating a signal through buffers restores the signal, which can be good if only information is wanted. But if the waveform is of importance, or if an analog signal should be measured the restoration is unwanted. Analog buffers can be used but they are limited to some hundred MHz. Even if the high-speed signal is taken off chip, the bandwidth of on-chip signals is getting very high, making the use of an external oscilloscope impossible for reliable measurement. Therefore other alternatives must be used.

In this work, an on-chip measuring circuit is designed, which makes use of the principle of a sampling oscilloscope. Only one sample is taken each period, resulting in an output frequency much lower than the input frequency. A slower signal is easier to take off-chip and it can easily be processed with an ordinary oscilloscope.

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Stridfelt, Arvid. "High Speed On-Chip Measurment Circuit." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2764.

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This master thesis describes a design exploration of a circuit capable of measuring high speed signals without adding significant capacitive load to the measuring node.

It is designed in a 0.13 CMOS process with a supply voltage of 1.2 Volt. The circuit is a master and slave, track-and-hold architecture incorporated with a capacitive voltage divider and a NMOS source follower as input buffer to protect the measuring node and increase the input voltage range.

This thesis presents the implementation process and the theory needed to understand the design decisions and consideration throughout the design. The results are based on transistor level simulations performed in Cadence Spectre.

The results show that it is possible to observe the analog behaviour of a high speed signal by down converting it to a lower frequency that can be brought off-chip. The trade off between capacitive load added to the measuring node and input bandwidth of the measurment circuit is also presented.

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Cauffet, Gilles. "Optimisation d'une chaîne de mesures électriques pour l'électronique de puissance : analyse des problèmes de mesure, caractérisation, correction et validation." Phd thesis, Grenoble INPG, 1992. http://tel.archives-ouvertes.fr/tel-00134137.

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L'amélioration de la fiabilité des convertisseurs hautes fréquences nécessite la connaissance de la puissance instantanée fournie par chaque interrupteur. Cette grandeur est très difficile à mesurer et le travail présenté ici vise à obtenir une bonne précision sur sa détermination en utilisant un oscilloscope numérique.

Bien qu'en théorie la grandeur cherchée soit simplement le produit du courant par la tension, aucun oscilloscope ne permet d'atteindre la précision requise. Au long de cette étude, de nombreuses causes d'erreurs sont identifiées. Pour la plupart d'entre elles, des améliorations faisant appel soit à des procédures d'étalonnage - correction, soit à des techniques de traitement du signal, sont présentées et testées.

Les erreurs introduites par les convertisseurs analogique-numérique de l'oscilloscope (quantification, non linéarités), ainsi que par les sondes de tension et de courant sont étudiées avec un soin particulier.

Enfin, l'ensemble de cette étude permet de dégager des méthodes de mesures et des critères pour le choix d'un oscilloscope numérique pour ce type d'application. Ce travail s'est concrétisé par le développement et la mise au point d'une chaîne de mesure pour l'électronique de puissance.

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Sajjadian, Farnad. "A 10MHz flash analog-to-digital converter system for digital oscilloscope and signal processing applications." 1985. http://hdl.handle.net/2097/27577.

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Βουγιούκας, Ηλίας. "Σχεδίαση κατασκευή και υλοποίηση σύγχρονου μικροϋπολογιστικού συστήματος." Thesis, 2013. http://hdl.handle.net/10889/6407.

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Η εργασία αυτή ερευνά την σχεδίαση ενός σύγχρονου μικροϋπολογιστικού συστήματος βασισμένο σε επεξεργαστή ARM COrtex-M3. Στα πλαίσια αυτής της σχεδίασης έγινε μελέτη των συσκευών που είναι απαραίτητες για την λειτουργία ενός παλμογράφου, και σχεδιάστηκε λογισμικό προσέγγισης της λειτουργίας των βασικών περιφερειακών του. Επιπλέον, γίνεται μια ανάλυση ενός συστήματος απεικόνισης γραφικών, χωρίς την χρήση του μικροελεγκτή, και ποιοτικός σχεδιασμός του συστήματος αυτού. Τέλος, εξάγονται συμπεράσματα για πολυπλοκότητα του σχεδίου και σχολιάζονται οι συμβιβασμοί που είναι απαραίτητοι για την υλοποίηση ενός συστήματος πραγματικού χρόνου.
This thesis analyzes the design of a modern microprocessing system based on an ARM Cortex-M3 microcontroller. For the implemantation of the design thorough research on the necessary peripherals of an oscilloscope is presented and several applications simulating the behavior of its basic functions via its peripherals. Furthermore, a qualitative design is created on a potential graphical processing system, able to fulfill all of the tasks needed to depict on-screen, without burdening the central processor. Conclusions are drawn on the complexity of the design and the tradeoffs of designing a realtime system.

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Liao, Chun-Yu, and 廖駿宇. "A Buffer Amplifier for Active Probes of Oscilloscope." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/31653560859042267252.

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碩士
國立臺灣大學
電子工程學研究所
104
As the extremely rapid development of electronic industry, the demand for measurement equipment and it’s related commercial value obviously increase year by year. However, most measurement equipment in the market is made by foreign manufacturers, such as Agilent and Tektronix Technology. In order to enhance the competitiveness of domestic measurement instruments industries, we must develop our own technologies and system in this field. 　　Above all, the two crucial specifications which impact the price and margin of digital oscilloscope are bandwidth and sampling rate. In this thesis, the advantages and disadvantages are analyzed between different probes. Also, a prototype of 10X active probe is proposed. There are two parts in the prototype of active probe, attenuation circuit and buffer amplifier. Using the architecture of super source follower and complementary source follower, the buffer amplifier is demonstrated to achieve wideband and high input voltage range. In the second work, an offset voltage calibration circuit is used to reduce the offset voltage in output at the same time. 　　All of chip designed in this thesis are implemented in 0.18 m 1P6M CMOS process.The measured -3dB bandwidth can achieve 2.7 GHz and the input voltage range from -1 V to 6 V in the first work. The chip size is 261 um x 279 um. In the second work, the measurement results show that the active probe system bandwidth achieve 1.7 GHz, and the input voltage range from 0.5 V to 5 V. The chip size is 570 um x 370 um.

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Bansod, Saurabh. "Design of low cost semi- virtual digital storage oscilloscope." Thesis, 2014. http://ethesis.nitrkl.ac.in/6026/1/110EI0251-6.pdf.

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The use of personal computers (PC) with the present-day automation, measurement and instrumentation world has opened up the door for Virtual Instrumentation. In this application a module (Arduino uno board) was used to design a semi-virtual instrument which can replace the general purpose instruments in an electronics lab. Arduino uno board is a module based on a single microcontroller. It has its associated software which is very easy to use. The programs are written in C language. In this application arduino is used to design a virtual oscilloscope. A serial communication is performed between arduino and computer. Computer is used to display continuous analog signal that has been given to the input of arduino. Since the input signal can be accessed and displayed using matlab, Fourier transform of the signal is also possible, thus it is also being used as a spectrum analyzer. A square wave has also been generated using Arduino. Hence it can also been used as a function generator.

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LIN, SHOU-KUO, and 林守國. "The Evolution of Oscilloscope and Using the Test Difference Analysis." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/774eye.

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碩士
國立高雄應用科技大學
電機工程系博碩士班
106
Under the rapid development of semiconductor manufacturing technology, ac-cording to Moore's Law, the number of transistors in an integrated circuit is multiplied every 1.5 years, so that the integrated circuit in the hardware circuit continues to develop toward small size, high speed and low power. The oscilloscope is the importance of the hardware engineer. Just as the eye is important to human beings, people can observe this complex and changing world through the eyes, but the "electricity" is invisible, so the scientists invented the oscil-loscope. To solve this problem, the electrical signal is converted into a waveform to represent, the voltage and time changes can be understood, the information represented by the electrical characteristics is analyzed in advance, and the electronic technology is pushed to the endless future through the oscilloscope. However, the analog oscilloscopes that were invented in the early days could not watch the waveforms of transient transients and record retention data files, which could not meet the needs of engineers. With the advancement of technology, the birth of digital storage oscilloscopes changed the habits of engineers. Using analog-to-digital conversion (ADC) technology to improve bandwidth, sampling rate, and memory depth, special trigger circuit, accurate automatic parameter measurement, multiple mathematical operations, and practical remote monitoring, greatly enhance the use of the oscilloscope Functions, whether complex and difficult to understand signals, or unusually difficult waveform changes, can be easily identified to solve the problem. The main content of the thesis is to explore the evolution process of the oscilloscope, understand the specifications, basic operations and advanced industrial demand applications, and finally explore the future development trend.

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27

Lin, Chou-Shih, and 林洲世. "The study of electronic oscilloscope application on engine's intake valve leakage detection." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/39528222476945202889.

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碩士
國立中興大學
農業機械工程學系
89
Currently, most of engine technicians utilize the compression pressure meter, vacuum gauge and air flow gauge to diagnose the intake valve leaking problem for four-stroke engines. Using these tools are found either not convenient or less accuracy for minor leakage. The electronic oscilloscope, which is generically equipped in modern automotive workshop, was used in this research associated with the manifold absolute pressure sensor (MAP) installed on modern vehicles to observe the vacuum pulse variation in an intake manifold when a intake valve leaking problem occurred in an four-cylinder-four-stroke engine. Based on the findings, one could study the relation between intake valve leakage quantities and waveform’s spikes captured by an electronic oscilloscope. The study, thus, expected to find those intake valve leaking problems by studying their waveform. The results showed that the waveform’s spikes captured by an oscilloscope having linear relation with the quantity of the intake valve leakage. The average value of R2 was calculated to be 0.985. To verify the effect of measuring locations, one way ANOVA analysis was used. Results showed that the F value was less than 3.49 for each location. That is, measuring locations did not affect the leaking measurements significantly. Thus, applying an electronic oscilloscope to detect the leaking problem in intake valves of a four-cylinder-four-stroke engine is possible. In addition, by appropriately arranging electronic oscilloscope’s trigger source, the linking intake valve could be precisely identified.

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28

Huang, Chong Xi, and 黃崇禧. "Design and analysis of data acquisition processor architecture in digital storage oscilloscope." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/14031983854912240387.

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29

Yung-Ying, Liang, and 梁永瑩. "Applying Oscilloscope to Investigate the Direct and Indirect Ozone Reactions in Water Pretreatment." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/39296898876787795979.

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碩士
東海大學
環境科學系
92
Ozone oxidation reaction consists of direct ozone molecule and indirect hydroxyl radical oxidations. These two reactions may target and oxidize organic functional groups effectively. Unfortunately, it also generate disinfection by-product at the same time. The ratio of direct and indirect attack may affected by the conditions that the ozonation oxidation is carried out. Understanding the mechanisms of these two ozone oxidation pathways are valuable. This study are adapts carbonate and bicarbonate as scavenger to inhibit the formation of hydroxyl radicals which will lead to an indriect ozone attack. Ozonation of samples with scavenger will undergo only direct ozone molecular oxidation. Thus, the direct and indirect ozone oxidation can be separated and investigated individually. In this study, synthetic and natural samples containing humic acids (HA) have been investigated for the inhibited and non-inhibited ozone oxidation. The results indicate that the contribution of indirect reaction is decreasing with the increasing amounts of inhibitor dosing. Ratio of direct and indirect attack is ranging from 3 to 19 in basic HA solution. The process oxidation reduction Potential (ORP) is monitored continuously with an on-line ORP sensor connected to oscilloscope. A real-time monitoring and controlling of ozone process has been developed using the Nernst equation based on on-line ORP measurement. 13C-NMR spectrums indicate that direct reaction can decrease the amount of carbohydrate carbons (60- 90 ppm) and aromatic carbons/ double bond carbons (90- 165 ppm). Hydroxyl free radical can consume aliphatic carbons (0- 60 ppm) at the beginning of ozonation. The molecular ozone direct attack reaction mainly decomposes the side chain of macromolecule to generate aliphatic carbons (0- 60 ppm), carbohydrate carbons (60- 90 ppm) and aromatic carbons/ double bond carbons (90- 165 ppm).

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30

Hung, Shr-Hsiung, and 洪士雄. "A High-Speed Real-Time Electro-Optic Sampling Oscilloscope Based on a Frequency-Discriminated and Delay-Time-Tunable Laser Source." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/87627794202981771832.

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碩士
大同大學
光電工程研究所
90
A novel real-time electro-optic sampling oscilloscope system with a delay-time tunable pulsed laser source is demonstrated. A voltage-controlled digital electronic phase shifter (DEPS) integrated with the pulsed laser is employed to substitute the opto-mechanic delay line for continuous tuning the delay-time of optical pulse-train in the EOS system. The maximum scanning speed, delay-time, tuning responsivity, and resolution of the DEPS are 100 point/sec, 3.56 ns (1.78 periods), 0.508 ns/volt, and 0.2 ps, respectively. This system further benefits the advantages of frequency tracking to free-running signals with suppressed timing-jitter. The SSB phase noise at 1 kHz offset from the carrier of the VCO phase-locked to the RFS can still be as low as —90 dBc/Hz. However, the probe beam 3dB pulsewidth of GSLD was 18 ps. The SSB phase noise of the GSLD was -70 dBc/Hz at 100Hz which is similar to the VCO SSB phase noise offset from the carrier frequency, and the timing jitter of GSLD will saturate to 1.2 ps as the frequency offset from carrier over 1 kHz. By using this system, the waveforms of microwave signals generated from a frequency synthesizer, and frequency divider are real-time sampled by showing on a sample oscilloscope. The main advantage of the real-time EOS oscilloscope is the decreasing in sampling time, which eventually prevents sampling distortion caused by the fluctuation in both the power and pulsewidth of GSLD during long-term operation.

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31

Stein, Maximilian. "Spatial and temporal dependencies of the motion bridging effect: Investigations of an illusory motion." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-13AC-4.

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