Issue Details
Using the NI RF Fixture Characterization Tool, I'm attempting to run a scalar characterization of an SG (signal generator) path. To do this, the signal generator's cabling is connected directly to an RF power meter. When I run the characterization, it fails and the measurements are not close to the expected values:

I notice in the activity log that the "NI CAL-5501" was detected as a power meter, but this is used for vector characterization and I have a different power meter installed that is suitable for this procedure. How can I ensure that this tool uses the correct installed power meter for the scalar characterization?