Agilent Technologies B1500A Guia do Utilizador descarregar pdf (Página 168)

4-12 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Programming Examples for C++ Users

Pulsed Spot Measurement

Measurement

Result Example

Id = 14.255000 mA (at 1.5 V)

Vg = 1.5 V

vd = 1.5; /* 30 */

idcomp = 0.05;

vg = 1.5;

igcomp = 0.01;

base = 0;

width = 0.001;

period = 0.01;

hold = 0.1; /* 37 */

ret = agb1500_force(vi, bulk, agb1500_VF_MODE, 0, 0, 0.1, 0);

ret = agb1500_force(vi, source, agb1500_VF_MODE, 0, 0, 0.1, 0);

ret = agb1500_setPbias(vi, gate, agb1500_VF_MODE, 2, base, vg,

width, period, hold, igcomp);

ret = agb1500_force(vi, drain, agb1500_VF_MODE, 2, vd, idcomp, 0);

check_err (vi, ret); /* 43 */

ret = agb1500_measureP(vi, drain, agb1500_IM_MODE, 0, &meas, &status, 0);

check_err (vi, ret); /* 46 */

ret = agb1500_zeroOutput(vi, agb1500_CH_ALL);

check_err (vi, ret); /* 49 */

printf("Id = %9.6f mA (at %3.1f V)\n", meas * 1000, vd);

printf("Vg = %3.1f V\n", vg); /* 52 */

ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0);

check_err (vi, ret); /* 55 */

}

Line Description

30 to 37 Defines the variable values for the source channels.

39 to 42 Applies voltage to device, and sets the pulsed bias source.

45 Performs pulsed spot measurement.

48 Sets the specified port to the zero output state.

51 to 52 Displays the measurement result data.

54 Disables all ports.

43, 46, 49 and 55 Calls the check_err subprogram (shown in Table 4-1) to check if an error status is

returned for the previous line.

56 End of the perform_meas subprogram.

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Agilent Technologies B1500A Guia do Utilizador Página 168