You can start with our comprehensive user manual can be found under the Help menu in SignalVu. The Getting Started section begins on page 18 and is quite helpful for new users.
https://www.tek.com/en/manual/spectrum-analyzer/signalvu-pc-rsa7100b
I would also recommend checking out this YouTube series that covers getting started with SignalVu-PC (the software that operates our RSA306B):
https://www.youtube.com/playlist?list=PLBfhD_4FPIYvlXXGJHZ-CYqvRAioEbZeP
You can save images, data, setups, and more by pressing File > Save As. To configure SignalVu to record and save data continuously open the recording menu by pressing Setup > Recording.
Since you are interested in tracking down interference I would recommend taking a look at the Mask Testing found under Tools > Mask Search. This allows you to define a mask and save data conditionally.