Agilent is starting a webcast series of sessions about Spectrum Analysis and RF basics. It may be of interest of (most) RF Explorer users and RF enthusiast out there.
RF Back to Basics: Part 1 - Signal Analysis on Jan/25th.
For those of you who don't know, Agilent is the spinoff of HP for testing instruments and RF devices among other things, a worldwide reference in RF for many decades.
I recommend all the Agilent background RF documentation to people interested in knowing more about RF, and specially those who want to get the max out of an Spectrum Analyzer. For instance, this is a general guide we recommended to many people already. The link may get invalid anytime as it is internal to Agilent, but if it doesn't work just look for the famous "Application Note 150", the "5952-0292EN.pdf" document or simply "Spectrum Analysis Basics" within the Agilent site.