4-4 Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 4
Programming Examples for Visual Basic .NET Users
Programming Basics
Step 6. Open a module (e.g. Module1.vb) in the project.
Step 7. Enter a program code as template. See Table 4-1 for example.
Step 8. Save the project as your template (e.g. \test\my_temp).
To Create Measurement Program
Create the measurement program as shown below. The following procedure needs
your project template. If the procedure does not fit your programming environment,
arrange it to suit your environment.
Step 1. Plan the automatic measurements. Then decide the following items:
• Measurement devices:
Discrete, packaged, on-wafer, and so on.
• Parameters/characteristics to be measured:
h
FE
, Vth, sheet resistance, and so on.
• Measurement method:
Spot measurement, staircase sweep measurement, and so on.
Step 2. Make a copy of your project template (e.g. \test\my_temp to \test\dev_a\my_temp).
Step 3. Rename the copy (e.g. \test\dev_a\my_temp to \test\dev_a\spot_id).
Step 4. Launch Visual Basic .NET.
Step 5. Open the project (e.g. \test\dev_a\spot_id).
Step 6. Open the module that contains the template code as shown in Table 4-1. On the code
window, complete the perform_meas subprogram. Then use the Agilent 4155/4156
VXIplug&play driver functions:
• name.SetSwitch to enable/disable the source/measurement channels
• name.Force, SetIv, etc. to set source outputs
• name.SpotMeas, SweepIv, etc. to perform measurements
• name.ZeroOutput to disable source outputs
where, name must be the declared instrument name (e.g. Ag415x).
Step 7. Insert the code to display, store, or calculate data into the subprogram.
Step 8. Save the project (e.g. \test\dev_a\spot_id).
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