This article is for folks familiar with analog and RF principles. The 147.20 repeater for most is ONE big coverage repeater, and all the links and equipment switching is transparent to normal use. Not to be confused with the Seattle "link" switch or other System enhancements. This discussion is just about the repeater itself. A user just uses the repeater like any other repeater on the 2 meter band, to talk to another station. What goes on behind the screen is really a lot. IF you feel you want to know all that goes on, this article is written for you. It may take a while to really understand what's happening every time you press you mic button. If you would rather just go over the operational lines, check out the FAQ and go from there.