I am writing functional verification test software for production test equipment. I have an application to determine the phase difference and gain of four acoustic sensors. This requires that I perform a time domain data acquisition of all 4 channels of a PCI-4552 DSA board simultaneously. I know how to acquire from all 4 channels in frequency domain, but there seems to be very little information on acquiring from time domain. It is sketchy on how to even acquire all 4 channels in Frequency domain. My software is LabWindows/CVI and TestStand. Any help would be greatly appreciated.