Transcript ECE 353 – GoLogic Tutorial

ECE 353 Fall 2005 –
GoLogic Tutorial
Presented by:
Ben Lapointe
Ben Doherty
ECE 353 – Fall 2005
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
ECE 353 Fall ’05 – GoLogic Presentation – Ben Doherty and Ben Lapointe
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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
ECE 353 Fall ’05 – GoLogic Presentation – Ben Doherty and Ben Lapointe
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Basic Steps
 Start GoLogic
 Connect the channels
 Configure the logic analyzer
• The “View Setup” button
 Press the ‘Go’ button
 Analyze waveforms
 Tutorial Video
ECE 353 Fall ’05 – GoLogic Presentation – Ben Doherty and Ben Lapointe
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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
ECE 353 Fall ’05 – GoLogic Presentation – Ben Doherty and Ben Lapointe
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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
ECE 353 Fall ’05 – GoLogic Presentation – Ben Doherty and Ben Lapointe
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