PWM Output Alignment

The NI-9470 PWM waveforms are rising edge-aligned. Configuring multiple channels to use the same external power supply can lead to higher transient currents drawn from the supply, thus increasing supply ripple and noise. You can reduce voltage ripple and noise by keeping Vsup cabling short and by providing bulk capacitance on the supply near the module. The supply must be capable of sourcing the peak current required. Refer to the Output Characteristics section of the NI-9470 Specifications for more infromation on maximum cable lengths.