Agilent Technologies B1500A Guía de usuario descargar pdf (Pagina 104)

3-10 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Programming Examples for Visual Basic Users

Multi Channel Spot Measurement

Table 3-3 explains example subprograms that enable/disable measurement channels

(perform_meas), perform the multi channel spot measurement (mspot_meas), and

display measurement result data (display_data). This example measures bipolar

transistor collector current and base current.

Table 3-3 Multi Channel Spot Measurement Example

Sub perform_meas(vi As Long, ret As Long) ’1

Dim pins(3) As Long ’SMU port numbers ’3

pins(0) = 1 ’SMU1: emitter

pins(1) = 2 ’SMU2: base

pins(2) = 4 ’SMU4: collector

ret = agb1500_setSwitch(vi, pins(2), 1) ’8

ret = agb1500_setSwitch(vi, pins(1), 1)

ret = agb1500_setSwitch(vi, pins(0), 1)

check_err vi, ret ’11

mspot_meas vi, ret, pins() ’13

ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0) ’15

check_err vi, ret

End Sub ’18

Line Description

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 mspot_meas subprogram (next page) to perform multi

channel spot 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.

1 2 ... 99 100 101 102 103 104 105 106 107 108 109 ... 207 208

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Agilent Technologies B1500A Guía de usuario Pagina 104