Hi, I am using the NI DAQmx VI's in LabVIEW to write to and read from a circuit board for testing purposes. The hardware setup is the USB-6509 with SCB-100 in DIO/passthrough mode. The USB-6509 is switched to "LOW" in the rear of the box. In NI MAX, the pins are all set to "Tristate".
When I write unsigned 64-bit data to P3.2(pin44) and P3.3(pin42) at the same time, both signals come out "distorted"(when probed at the screw terminals of the SCB-100). Normally, the Highs are around +5V and Lows are around 0V with nothing in between. However, these unclean signals show another level of around +1.7V in addition to the +5V & 0V extremes. Also, the signals do not match the inputted data in LabVIEW. Same thing happens between P3.6(pin36) and P3.5(pin38). If anyone has encountered this before or knows how to correct this issue, I would love to hear from you. Thanks in advance.
