Agilent Technologies B1500A

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-47
Programming Examples for C++ Users
High Speed Spot C Measurement
Table 4-17 High Speed Spot C Measurement Example
void perform_meas (ViSession vi, ViStatus ret) /* 1 */
{
ViInt32 drain= 1; /* SMU1 */
ViInt32 gate /* CMUH */
ViInt32 source= 4; /* SMU4 */
ViInt32 substrate /* CMUL */
ViReal64 freq= 1000000;
ViReal64 ref_cp= 0;
ViReal64 ref_g= 0;
ViReal64 osc_level= 0.03;
ViReal64 dc_bias= -5;
ViInt32 range= 0;
ViReal64 md[2];
ViInt32 st[2];
ViReal64 mon[2];
ViInt32 st_mon[2];
ViReal64 mt;
ret = agb1500_setSwitch(vi, drain, 1); /* 19 */
ret = agb1500_setSwitch(vi, source, 1);
check_err (vi, ret);
ret = agb1500_force(vi, source, agb1500_VF_MODE, 0, 0, 0.1, 0); /* 23 */
ret = agb1500_force(vi, drain, agb1500_VF_MODE, 0, 0, 0.1, 0);
ret = agb1500_scuuPath(vi, agb1500_CH_CMU, agb1500_SCUU_CMU); /* 26 */
ret = agb1500_setSwitch(vi, agb1500_CH_CMU, agb1500_FLAG_ON);
ret = agb1500_setCmuInteg(vi, agb1500_INTEG_AUTO, 2);
phase_compen (vi, ret); /* 30 */
Line Description
1 Beginning of the perform_meas subprogram.
3 to 17 Declares variables, and defines the value.
19 to 20 Enables source channels connected to the drain and source terminals.
21 Calls the check_err subprogram (shown in Table 4-1) to check if an error status is
returned for the previous line.
23 to 24 Applies 0 V to the drain and source terminals.
26 Sets the SCUU connection path.
27 to 28 Enables the MFCMU, and sets the integration time.
30 Calls the phase_compen subprogram (shown in Table 4-15) used to perform the phase
compensation of the MFCMU.