Link capacity Test and spectrum analysis "for dummies"

Hi All,

I am hoping someone can point me to or suggest a good, “for dummies-like” primer on the internet on how to better understand the Link Capacity test and Spectrum analysis from the SM. It seems to be an issue that keeps rearing its ugly head and I just don’t have the resources available (time) at the moment to keep going through it to better explain what might be going on and whether or not they are a good candidate to be installed. I would love something we can build on, edit, add pix to or whatever we need but … just something to help spread the knowledge around for basic troubleshooting. Perhaps there is a basic motorola-based wisp troubleshooting and support site?