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I AM USING AGILENT 34970A DATA ACQUISITION SWITCH UNIT WITH SCANNING CARD AGILENT 34901A. I WANT TO MEASURE VOLTAGE MEASUREMENTS FROM THREE-CHANNEL PHOTODIODE BY USING CHANNELS 102, 103 AND 104 SIMULTANEOUSLY. I USED THREE TYPES OF THE SAME LABVIEW CODE GIVEN IN FIGURE 3 (http://zone.ni.com/devzone/cda/tut/p/id/4644) FOR READING THE VOLTAGE FROM EACH CHANNEL. HOVEWER THE OBTAINED VOLTAGE RESULTS ARE INCORRECT BY COMPARING WITH MONITORING RESULTS. FOR EXAMPLE, WHEN THE VOLTAGE AT THE CHANNEL 102 IS 2.12 V, THE VOLTAGE READOUT OBTAINED VIA THE SOFTWARE CHANGE RANDOMLY BETWEEN 0.6 V AND 11 V. THE SAME SITUATIONS ARE OBSERVED FOR THE OTHER CHANNELS, 103 AND 104.
