I should clarify what I have done so far:

RF Splitter used between TX and RX. One signal going to spectrum analyzer. 30dB attenuator at RX. 20 dB attenuator into spectrum analyzer.

While in the opencpi/projects/osps/ocpi.osp.e3xx/applications/fsk_dig_radio_ctrlr folder (development host):

ocpidev build --rcc-platform xilinx19_2_aarch32

ocpidev build --hdl-platform e31x

On remote system:

export OCPI_LIBRARY_PATH=/mnt/ocpi_assets/artifacts:/mnt/ocpi_core/artifacts:/mnt/ocpi_e31x/artifacts:/mnt/ocpi_assets/hdl/assemblies/fsk_modem:/mnt/ocpi_core/hdl/assemblies/fsk_modem:/mnt/ocpi_e31x/hdl/assemblies/fsk_modem/

Then in osps_e31x/applications/fsk_dig_radio_ctrlr:

ocpirun -v -x -t 15 fsk_modem_app.xml