Up: Lab 1: HCMOS Logic
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Subsections
3.1 Logic Analyzer
Start the logic analyzer by double-clicking on the LA Viewer icon on
the Windows desktop. Do the following:
- From the Clock menu in the upper right corner of the LA Viewer
window set the internal clock for a 5MHz sampling rate.
- Right-click in the leftmost column of the viewing area and
select delete all labels.
- Right-click in the leftmost column of the viewing area and
select add label. Add representative names and select the
appropriate channels.
- Click on the button with a single running man. The logic
analyzer will sample the logic levels on lines 0 and 1.
- Observe the Waveform window. You can use the Magnifying
Glass icons on the menu bar to zoom in and out. Does the
waveform make sense to you? Print a sample of the waveform, and
put it in your lab notebook. To print a copy of this waveform,
make sure the logic analyzer software is in the foreground (it
is the current program). Then, press Âlt+PrintScrn to take a
snapshot of that window. You can now paste this image into Word
which will make it easy to print out.
- Another way of displaying logic data is as
numbers. Right-click on the leftmost column, select combine
labels, give this label any name, move all labels from source
box to destination box where output is at the top, and the
is at the bottom and click OK. Right click on that name, select
Configure Labels, and change Group Type to binary. How does this
numeric data compare to a truth table format?
Up: Lab 1: HCMOS Logic
Previous: 2 Lab
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Last Modified 2009-09-01