Agilent Technologies B1500A User's Guide download pdf (Page 203)

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.

1 2 ... 198 199 200 201 202 203 204 205 206 207 208

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Agilent Technologies B1500A User's Guide Page 203