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ECE 353 Fall 2005 – GoLogic Tutorial. Presented by: Ben Lapointe Ben Doherty. What is a Logic Analyzer?. Tool to examine how a digital system operates Creates waveforms to visualize output Can find system errors and instabilities Better at analyzing digital systems than an oscilloscope
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ECE 353 Fall 2005 – GoLogic Tutorial Presented by: Ben Lapointe Ben Doherty
What is a Logic Analyzer? • Tool to examine how a digital system operates • Creates waveforms to visualize output • Can find system errors and instabilities • Better at analyzing digital systems than an oscilloscope • Oscilloscope will show continuous voltage • Logic analyzer shows discrete logic levels
How Does a Logic Analyzer Work? • Input channels are sampled with a “sampling clock,” which can be between 1KHz and 500Mhz • Samples are assigned a logical value (high or low) if they fall above or below a certain “threshold voltage” • Digitized samples can be viewed as a waveform or a text output
Basic Steps • Start GoLogic • Connect the channels • Configure the logic analyzer • The “View Setup” button • Press the ‘Go’ button • Analyze waveforms • Tutorial Video
Logic Analyzer Tips • Use long leads • Make bundles of different color wires to keep leads sane • NEVER bend the logic analyzer connectors: • Wires should fit in snugly without bending • Bending could cause fatigue and result in a broken connector
Remember • Logic analyzers are very expensive pieces of equipment ($3,000) Treat them nicely • When your system is not working as expected, the logic analyzer is your best friend • Logic analyzer for digital signals, oscilloscope (or multimeter) for analog signals