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/*** VOLTAGE OUTPUT ADJUSTMENT ***/
for (i=1;i<num_chan+1;i++)
{
result = 0;
while (result < 1)
{
err=viPrintf(dac, “CAL%d:CONF:VOLT?\n”,i); /* Configure for calibration */
if(err < VI_SUCCESS) err_handler(dac, err);
err=viScanf(dac, “%d”, &result); /* Enter integer returned */
/* returns a 1 when ready to calibrate */
if(err < VI_SUCCESS) err_handler(dac, err);
}
result = 1;
while (result !=0)
{
meas_volt=get_voltage (); /* Get the voltage measurement */
err=viPrintf(dac, “CAL%d:VAL:VOLT? %f\n”,i,meas_volt); /* Send the measurement*/
if(err < VI_SUCCESS) err_handler(dac, err);
err=viScanf(dac, “%d”, &result); /* Enter integer returned */
/* returns a 0 when calibration complete */
if(err < VI_SUCCESS) err_handler(dac, err);
if (result == 5) /* Calibration for this channel aborted */
{
printf (“Calibration for channel %d aborted\n”,i);
result = 0;
}
}
}
/*** CURRENT OUTPUT ADJUSTMENT ***/
/*** set the calibration resistor value ***/
result = 0;
while (result < 1)
{
err=viPrintf(dac, “CAL:CONF:RES?\n”); /* Configure for resistance calibration */
if(err < VI_SUCCESS) err_handler(dac, err);
err=viScanf(dac, “%d”, &result); /* Enter integer returned */
/* returns a 1 when ready to calibrate */
if(err < VI_SUCCESS) err_handler(dac, err);
}
meas_res = get_resistance();
err=viPrintf(dac, “CAL:VAL:RES %f\n”,meas_res); /* Send the resistance value */
if(err < VI_SUCCESS) err_handler(dac, err);
/*** channel current output adjustment ***/
for (i=1;i<num_chan+1;i++)
{
result = 0;
while (result < 1)
{
err=viPrintf(dac, “CAL%d:CONF:CURR? \n”,i); /* Configure for calibration */
if(err < VI_SUCCESS) err_handler(dac, err);
163 Voltage/Current Output Adjustment Appendix D