Agilent Technologies B1500A Guia do Utilizador descarregar pdf (Página 198)

4-42 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Programming Examples for C++ Users

Sampling Measurement

ret = agb1500_setSwitch(vi, t1, 1); /* 30 */

ret = agb1500_setSwitch(vi, t2, 1);

ret = agb1500_setSwitch(vi, low, 1);

ret = agb1500_setFilter(vi, agb1500_CH_ALL, agb1500_FLAG_ON);

ret = agb1500_setAdc(vi, agb1500_HRESOLN_ADC, agb1500_INTEG_MANUAL, 2,

agb1500_FLAG_OFF);

check_err (vi, ret); /* 35 */

ret = agb1500_setSample(vi, bias_h, base_h, interval, nop); /* 37 */

ret = agb1500_addSampleSyncIv(vi, t1, agb1500_VF_MODE, 0, base, bias, icomp);

ret = agb1500_addSampleSyncIv(vi, t2, agb1500_VF_MODE, 0, base, bias, icomp);

ret = agb1500_force(vi, low, agb1500_VF_MODE, 0, vlout, ilcomp, 0);

check_err (vi, ret); /* 41 */

ret = agb1500_sampleIv(vi, mch, mode, range, &point, &index[0], &value[0],

&status[0], 0);

check_err (vi, ret);

ret = agb1500_zeroOutput(vi, agb1500_CH_ALL); /* 46 */

check_err (vi, ret);

if ( point != nop ) { /* 49 */

printf ("%d measurement data were returned.\nIt must be %d data.\n", point,

nop);

ret = agb1500_clearSampleSync(vi);

ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0);

check_err (vi, ret);

exit (ret);

}

Line Description

30 to 32 Enables source and measurement channels.

33 Sets the SMU filter to ON for all output channels.

34 Sets the integration time of the measurement channel’s A/D converter.

35, 41, 44,

47, and 53

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

returned for the previous line.

37 to 40 Sets the sampling timing parameters and constant voltage sources. And applies 0 V to

the low terminal of devices.

43 Performs sampling measurement.

46 Sets all channels to the zero output state.

49 to 55 Stops the program execution if the number of returned data is not equal to the nop value.

1 2 ... 193 194 195 196 197 198 199 200 201 202 203 ... 207 208

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Agilent Technologies B1500A Guia do Utilizador Página 198