Agilent Technologies B1500A User's Guide download pdf (Page 183)

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-27

Programming Examples for C++ Users

Multi Channel Sweep Measurement

ret = agb1500_setAdc(vi, agb1500_HSPEED_ADC, agb1500_INTEG_MANUAL, smpl,

agb1500_FLAG_OFF); /* 41 */

ret = agb1500_setAdcType(vi, agb1500_CH_ALL, agb1500_HSPEED_ADC);

ret = agb1500_resetTimestamp(vi);

check_err (vi, ret); /* 45 */

ret = agb1500_force(vi, emitter, agb1500_VF_MODE, 0, ve, iecomp, 0); /* 47 */

ret = agb1500_force(vi, collector, agb1500_VF_MODE, 0, vc, iccomp, 0);

ret = agb1500_setIv(vi, base, agb1500_SWP_VF_SGLLIN, 0, vb1, vb2, nop, hold, delay,

s_delay, ibcomp, pcomp);

check_err (vi, ret); /* 50 */

ret = agb1500_msweepMiv(vi, mch, mode, range, &rep, &sc[0], &md[0], &st[0],

&tm[0]);

check_err (vi, ret); /* 53 */

ret = agb1500_zeroOutput(vi, agb1500_CH_ALL); /* 55 */

ret = agb1500_setSwitch(vi, agb1500_CH_ALL, 0);

check_err (vi, ret); /* 57 */

if ( rep != nop ) { /* 59 */

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

exit (ret);

}

ViInt32 i; /* 64 */

ViInt32 n;

printf(" Vb (V), Ic (mA), Ib (mA)\n");

for (i = 0; i < nop; i++){

printf(" %4.2f, %9.6f, %9.6f\n", sc[i], md[2*i] * 1000, md[2*i+1] * 1000);

} /* 69 */

Line Description

41 to 42 Sets the high speed ADC, and selects it for all measurement channels.

44 Resets time stamp.

47 to 49 Applies voltage to device, and sets the staircase sweep source.

52 Performs measurement by using the agb1500_msweepMiv function.

55 Sets the specified port to the zero output state.

56 Disables all ports.

39, 45, 50, 53,

and 57

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

returned for the previous line.

59 to 62 Stops the program execution if the number of returned data is not equal to nop.

64 to 69 Displays the measurement result data.

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Agilent Technologies B1500A User's Guide Page 183