Solution
When using the PXIe-5841 device to acquire signals as a scanner, the NI-RFSA driver must be installed. This driver is essential for spectrum analysis, power measurements, and scanning operations.
Additionally, if you want to generate signals or perform advanced measurements using the device, it is recommended to install
NI‑RFSG and
NI‑RFMX as well. In most cases, users install all three drivers. However, if you choose to install all of them, it is important to use matching driver versions. Using different driver versions may result in unexpected errors.