@Duane: What about using different colors for harmonics or overlapping frequencies?
If you look at Parts 1 and 2 of the BADASS Display project, you will see videos showing all sorts of ways of displaying the info. One of them had the different colors changing horisontally -- each frequency having a different color.
I also like the "peak hold" type where the top-most dot on a frequency column hangs for a moment and then slowly falls.
The great thing is that -- once youve extracted the spectum info -- you can play with all sorts of ways of displaying it -- that's the part I'm really looking forward to -- I'm hoping to bring this to EE Live 2015! to show it off...
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.