Agilent Technologies B1500A User's Guide download pdf (Page 176)

4-20 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Programming Examples for C++ Users

Staircase Sweep Measurement

Table 4-7 uses the multi channel sweep measurement mode to perform the same

measurement as the previous example (Table 4-6, MOSFET Id-Vg measurement).

Table 4-7 Staircase Sweep Measurement Example 3

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

{

ViInt32 drain = 1; /* SMU1 */ /* 4 */

ViInt32 gate = 2; /* SMU2 */

ViInt32 source = 4; /* SMU4 */

ViInt32 bulk = 6; /* SMU6 */

ViReal64 vd = 3;

ViReal64 vg = 3;

ViReal64 idcomp = 0.05;

ViReal64 igcomp = 0.01;

ViReal64 hold = 0;

ViReal64 delay = 0;

ViReal64 s_delay = 0;

ViReal64 pdcomp = 0;

ViReal64 pgcomp = 0;

ViInt32 nop = 11;

ViInt32 rep;

ViReal64 sc[11];

ViReal64 md[11];

ViInt32 st[11];

ViReal64 tm[11];

ViInt32 i;

ViChar f_name[] = "C:\\Agilent\\ex\\data3.txt";

ViChar head1[] = "Vg (V), Id (mA), Time (sec), Status";

ViChar msg1[] = "Saving data...";

ViChar msg2[] = "Data save completed.";

ViChar c = ’\n’; /* 31 */

ret = agb1500_setSwitch(vi, drain, 1); /* 33 */

ret = agb1500_setSwitch(vi, gate, 1);

ret = agb1500_setSwitch(vi, source, 1);

ret = agb1500_setSwitch(vi, bulk, 1);

check_err (vi, ret); /* 37 */

Line Description

1 Beginning of the perform_meas subprogram.

4 to 31 Declares variables, and defines the value.

33 to 36 Enables measurement channels.

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

an error status is returned for the previous line.

1 2 ... 171 172 173 174 175 176 177 178 179 180 181 ... 207 208

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Agilent Technologies B1500A User's Guide Page 176

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