Solution
PXI High-Speed Serial Instruments help engineers validate, interface through, and test high-speed serial protocols. These instruments take advantage of FPGA multigigabit transceivers (MGTs) to support line rates up to 28.2 Gbps through different connector types like QSFP or Six Mini-SAS HD.
When data sheets refer to the Data Rate of a high-speed serial FlexRIO device, it is referring to the line rate of one of the channels of the given port. For example, for a PXIe-7902 which has a maximum Data Rate of 12.5 Gbps, each port contains four TX/RX channels. Therefore, the total data that can be transferred to or from the port is 50 Gbps.
However, this calculation is based on the FPGA speed grade alone. Note that the actual maximum amount of data one can send across the ports would likely be less depending on the high-speed serial protocol used and the encoding the protocol is using. Clocking and power limitations can also impact the performance depending on the overall user design as the MGTs consume much more power above ~13 Gbps and it gets harder to close timing in the FPGA.