Agilent Technologies 4155C, User Manual

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3-6 Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 4
Programming Examples for Visual Basic Users
Programming Basics
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.
Step 5. Open the project (e.g. \test\dev_a\spot_id).
Step 6. Open the form that contains the template code as shown in Table 3-1. On the code
window, complete the perform_meas subprogram. Then use the Agilent 4155/4156
VXI
plug&play driver functions:
• hp4156b_setSwitch to enable/disable the source/measurement channels
• hp4156b_force, hp4156b_setIv, etc. to set source outputs
• hp4156b_spotMeas, hp4156b_sweepIv, etc. to perform measurements
• hp4156b_zeroOutput to disable source outputs
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).