I've just started using inSIDDer Office and DBx and like it a lot. I'm trying to understand the main spectrum graphs. I can't find much of anything in the user guide or Megageek website about interpreting these graphs. Before I buy Chanalyzer, I'd like to understand better the information available in Office. Frequency I understand. Is height a measure of RF level in dBm? What's the significance of the colors, blue, green, red, etc and the density of the display?