The ARC spectrum analyser is part of the ARC5000 and ARC8200 products (BC780XLT support under development). Here is some additional information.
A spectrum analyser will give you a graphical presentation of a certain frequency range. The ARC spectrum analyser has 3 operating mode:
- Realtime Mode: showing realtime activity in a selected search range
- Cumulative Mode: showing all highest signals received since analysis was started
- Hit Mode: showing frequency occupancy in percent since analysis was started
Some screenshots of these modes are available in the example at this site.
You can use a spectrum analyser for several things. First it shows a grapical presentation of a certain frequency range. You can monitor activity to find new or empty frequencies. The occupancy will give you some information about how often a frequency is used.
Here is an example of Spectrum Analysis we did of a UFH cellular band in The Netherlands