Agilent Technologies B1500A Guide de l'utilisateur télécharger pdf (Page 190)

4-34 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Programming Examples for C++ Users

Staircase Sweep with Pulsed Bias Measurement

ret = agb1500_setSwitch(vi, drain, 1); /* 38 */

ret = agb1500_setSwitch(vi, gate, 1);

ret = agb1500_setSwitch(vi, source, 1);

ret = agb1500_setSwitch(vi, bulk, 1);

check_err (vi, ret); /* 42 */

ret = agb1500_resetTimestamp(vi); /* 44 */

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);

for (j = 0; j < nop2; j++){ /* 48 */

dvg[j] = (j + 1) * vg / nop2;

ret = agb1500_setPbias(vi, gate, agb1500_VF_MODE, 0, 0, dvg[j], width, period,

p_hold, igcomp);

ret = agb1500_setIv(vi, drain, agb1500_SWP_VF_SGLLIN, 0, 0, vd, nop1, hold,

delay, s_delay, idcomp, p_comp);

check_err (vi, ret);

ret = agb1500_sweepPbias(vi, drain, agb1500_IM_MODE, 0, &rep, &sc[i], &md[i],

&st[i], &tm[i]);

check_err (vi, ret);

if ( rep = nop1 ) {

i = i + nop1;

}

else {

printf ("%d measurement steps were returned.\nIt must be %d steps.\n", rep,

nop1);

ret = agb1500_zeroOutput(vi, agb1500_CH_ALL);

ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0);

check_err (vi, ret);

exit (ret);

}

} /* 67 */

ret = agb1500_zeroOutput(vi, agb1500_CH_ALL); /* 69 */

check_err (vi, ret);

Line Description

38 to 41 Enables measurement channels.

44 Resets time stamp.

45 to 46 Applies voltage to device.

48 to 67 Applies pulsed voltage and sweep voltage, and performs staircase sweep

measurement. After that, disables all ports and stops the program execution if the

number of returned data is not equal to the nop1 value.

69 Sets the specified port to the zero output state.

42 and 70 Calls the check_err subprogram (shown in Table 4-1) to check if an error status is

returned for the previous line.

1 2 ... 185 186 187 188 189 190 191 192 193 194 195 ... 207 208

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Agilent Technologies B1500A Guide de l'utilisateur Page 190

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