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To use NI-RFSA instrument driver FPGA extensions with RFmx, you must install NI-RFSA along with RFmx and the latest version of LabVIEW. When you install NI-RFSA, a model-specific folder for your device is created in the following location:
For RFmx to recognize your precompiled bitfile, ensure that the precompiled bitfile is located in the model-specific folder that corresponds to your device.
|Note The NI 5624R is supported by RFmx only as part of the NI 5668R VSA. Refer to the NI IF Digitizers Help, located at ni.com/manuals, for more information about using the NI 5624R as a stand-alone device.|
NI-RFSA includes two FPGA bitfiles for use with the NI 5668R in a separate directory from the directories listed in the previous section. The NI 5668R default 400 MHz bitfile and the optional 800 MHz bitfile are located in the following directory:
To use RFmx with NI-RFSA instrument driver FPGA extensions, you must specify the precompiled bitfile you want to use when you initialize the RFmx session. If you want to access additional FPGA functionality provided by the precompiled bitfile, you must also obtain an FPGA reference to use with the LabVIEW FPGA host interface.
|Note You can load only one bitfile on a device at a time. If you are using both RFmx and another device driver such as NI-RFSA or NI-RFSG to simultaneously access the same instrument, both sessions must initialize with the same bitfile.|
Complete the following steps to open an instrument driver session that uses a precompiled bitfile:
where filename.lvbitx is the filename of the bitfile you want to load.
Complete the following steps to obtain an FPGA reference to use with the LabVIEW FPGA host interface:
The following figure illustrates how the code might look after completing the preceding steps.