NI9234 sampling rate - LabVIEW FPGA

Hey guys,

I have very simple question. I am checking a sample code in labview examples for NI 9234. what is the difference between data rate and samples per channels?

If we read with maximum data rate which is 51.2 KS/s (reading 4 channels), so the samples per channel should be 51.2/4=12.8 KS/s/ch . am I right? if this is correct, what is the sample per channel control in the FPGA vi?