This feature allows you to :
- Get a "picture" of spectrum activity across the selected range
- Identify intermittently active frequencies.
- See the relative signal strength of signals in the range
And some more stuff that I'm sure others will chip in with.
EDIT: More from the Proscan page:
Band Scope is a tool that can check the antenna performance, coax quality, coverage areas, interference, etc. Bands of frequencies to sweep are configured in the scanner "Search for..." --> "Edit Custom". Simply hit the start button and let the scanner go into action. The window slider control puts a range of frequencies in view. Some of the bands are interesting. Sweep the bands from 25 MHz to 1300 MHz.