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Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-11

Programming Examples for C++ Users

Pulsed Spot Measurement

Table 4-4 explains an example subprogram that performs the pulsed spot

measurement. The following subprogram will apply voltage to a MOSFET, measure

drain current, and display the measurement result data.

Table 4-4 Pulsed Spot Measurement Example

void perform_meas (ViSession vi, ViStatus ret) /* 1 */

{

ViInt32 drain; /* 3 */

ViInt32 gate;

ViInt32 source;

ViInt32 bulk;

drain = 1; /* SMU1 */

gate = 2; /* SMU2 */

source = 4; /* SMU4 */

bulk = 6; /* SMU6 */ /* 11 */

ret = agb1500_setSwitch(vi, drain, 1); /* 13 */

ret = agb1500_setSwitch(vi, gate, 1);

ret = agb1500_setSwitch(vi, source, 1);

ret = agb1500_setSwitch(vi, bulk, 1);

check_err (vi, ret); /* 17 */

ViReal64 vd; /* 19 */

ViReal64 vg;

ViReal64 idcomp;

ViReal64 igcomp;

ViReal64 base;

ViReal64 width;

ViReal64 period;

ViReal64 hold;

ViReal64 meas;

ViInt32 status; /* 28 */

Line Description

1 Beginning of the perform_meas subprogram.

3 to 11 Declares variables, and defines the value.

13 to 16 Enables measurement channels.

17 Calls the check_err subprogram (shown in Table 4-1) to check if

an error status is returned for the previous line.

19 to 28 Declares variables, and defines the value.

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