Breakdown Voltage Measurement - Agilent Technologies B1500A User Manual

Table 3-12
Programming Examples for Visual Basic Users

Breakdown Voltage Measurement

Breakdown Voltage Measurement
Table 3-12 explains example subprograms that enable/disable measurement
channels (perform_meas), perform the quasi pulsed spot measurement (vbd_meas),
and display measurement result data (display_data). This example measures bipolar
transistor breakdown voltage.
Breakdown Voltage Measurement Example
Sub perform_meas(vi As Long, ret As Long)
Dim pins(3) As Long
pins(0) = 1
'pins(1) = 2
pins(2) = 4
ret = agb1500_setSwitch(vi, pins(2), 1)
'ret = agb1500_setSwitch(vi, pins(1), 1)
ret = agb1500_setSwitch(vi, pins(0), 1)
check_err vi, ret
vbd_meas vi, ret, pins()
ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0)
check_err vi, ret
End Sub
Line
1 Beginning of the perform_meas subprogram.
3 to 6 Declares variables, and defines the value.
8 to 10 Enables measurement channels.
13 Calls the vbd_meas subprogram (next page) to perform
breakdown voltage measurement.
15 Disables measurement channels.
11 and 16 Calls the check_err subprogram (shown in Table 3-1) to check if
an error status is returned for the previous line.
18 End of the perform_meas subprogram.
3-56 Agilent B1500 VXIplug&play Driver User's Guide, Edition 3
'SMU port numbers
'SMU1: emitter
SMU2: base - open
'SMU4: collector
Description
'1
'3
'8
'11
'13
'15
'18