1. ELEC 101
Lab 5

2. Lab 05 Objectives
• The student will be able to
– Open an existing project
– Create a new simulation profile
– Run a simulation and view the Probe output
– Modify the Probe ranges and grids for the X Axis and Y Axis
– Create a new project
– Create a new simulation for Bias Point Analysis
– Configure the schematic to display node voltages and branch currents
February 2004 ELEC 101 Lab 5 2

3. Lab 5A
Probe Window Output

4. Lab 5A Requirements
• Open Circuit from Disk
• Create a New Simulation Profile for AC Sweep Analysis
• Place a ground referenced VDB Marker
• Run the simulation
• View Probe Output
• Change the X Axis grid markers to make readings more
accurate
• View Probe Output and make further modifications if desired
February 2004 ELEC 101 Lab 5 4

5. Lab 5A Schematic
February 2004 ELEC 101 Lab 5 5

6. Lab 05A Create New Simulation Profile
CL on PSpice
CL on New Simulation Profile
February 2004 ELEC 101 Lab 5 6

7. Settings for New Simulation Profile
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8. Select Desired Marker for Probe Output
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9. Place VDB Voltage Probe at OUT
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10. Run the Simulation
On the PSpice Toolbar, CL on the Run Button
February 2004 ELEC 101 Lab 5 10

11. Lab 05A Probe Output
X-Axis is not a linear scale. Reading frequencies is not accurate
February 2004 ELEC 101 Lab 5 11

12. Changing X Axis Grid
CL on Plot
CL on Axis Settings
February 2004 ELEC 101 Lab 5 12

13. Modify X Grid Intervals
CL on the X Grid Tab
Turn off Automatic and select 10 for Minor
February 2004 ELEC 101 Lab 5 13

14. Revised Lab05A Probe Output
The increased number of x axis markers makes the graph easier to read
February 2004 ELEC 101 Lab 5 14

15. Lab 5B
Probe Output Modification
Add Traces

16. Lab 5B Schematic
February 2004 ELEC 101 Lab 5 16

17. Probe Output for Transient Analysis
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18. Change the Y Axis Range
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19. Modified Probe Output
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20. Add a Plot on the Top of the Current One
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21. Probe Output with Additional Plot Window
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22. Select Add Trace from the Trace Menu
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23. Select the Waveform to Plot – VIN
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24. Revised Probe Output
We can readily compare the relationship between the input waveform and the output current
February 2004 ELEC 101 Lab 5 24

25. Lab 5C
Bias Point Calculation

26. Lab 05C Overview
• In some cases we wish to determine an operating point
– this is called the Bias Point
• When Bias Point Simulation is performed in PSpice, it does
not generate a Probe Output because no component values are
swept.
• After running the simulation, close the probe Window and
Select V or I from the toolbar to have Capture display all node
voltages or all the branch currents.
• The student will Place a Net Alias (special text inserted in the
schematic) to identify nodes of particular interest
February 2004 ELEC 101 Lab 5 26

27. Lab 05C Schematic
February 2004 ELEC 101 Lab 5 27

28. Lab 05C Add Net Alias
CL on PSpice
CL on Net Alias
Type Net Alias text in the Alias box and CL on OK
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29. Lab 05C Schematic
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30. Bias Point Selection
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31. Lab 05C Schematic with Node Voltages
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32. Lab 5A
Printed Output for Submission

33. Place VDB Voltage Probe at OUT
February 2004 ELEC 101 Lab 5 33

34. Revised Lab05A Probe Output
The increased number of x axis markers makes the graph easier to read
February 2004 ELEC 101 Lab 5 34

35. Lab 5B
Printed Output for Submission

36. Lab 5B Schematic
February 2004 ELEC 101 Lab 5 36

37. Revised Probe Output
We can readily compare the relationship between the input waveform and the output current
February 2004 ELEC 101 Lab 5 37

38. Lab 5C
Printed Output for Submission

39. Lab 05C Output
February 2004 ELEC 101 Lab 5 39