Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 3-31
Programming Examples for Visual Basic Users
Staircase Sweep Measurement
ret = agb1500_resetTimestamp(vi) ’40
ret = agb1500_force(vi, m(3), agb1500_VF_MODE, 0, vcon1, 0.05, 0)
ret = agb1500_force(vi, m(2), agb1500_VF_MODE, 0, vcon2, 0.05, 0)
ret = agb1500_setIv(vi, m(1), agb1500_SWP_VF_SGLLIN, 0, vpri1, vpri2, nop, hold,
delay, s_delay, i1comp, p1comp)
check_err vi, ret
ret = agb1500_setNthSweep(vi, 2, m(0), agb1500_VF_MODE, 0, vsyn1, vsyn2, i2comp,
P2comp)
check_err vi, ret ’46
ret = agb1500_msweepIv(vi, m(0), agb1500_IM_MODE, 0, rep, sc(0), md(0), st(0),
tm(0))
check_err vi, ret
ret = agb1500_zeroOutput(vi, agb1500_CH_ALL) ’51
Dim msg As String
If rep = nop Then ’54
save_data nop, md(), st(), sc(), tm(), vi, ret, m()
Else
msg = rep & " measurement steps were returned. It must be " & nop & " steps."
MsgBox msg, vbOKOnly, ""
End If ’59
End Sub ’61
Line Description
40 Resets time stamp.
41 to 42 Applies voltage to device.
43 Sets the primary sweep source.
45 Sets the synchronous sweep source.
48 Performs the staircase sweep measurement.
51 Sets the specified port to the zero output state.
44, 46, and 49 Calls the check_err subprogram (shown in Table 3-1) to check if an error status is
returned for the previous line.
54 to 59 Calls the save_data subprogram to save measurement data. Or, displays a message
box if the number of returned data is not equal to the nop value.
61 End of the sweep_meas subprogram.
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