Up and downlinks fall into several different classes based on ERP and receiver antenna gain as shown below. The column labeled Standby-receive gain is for the user who is not aware of, nor optimized for satellite reception. For example, an HT in a pocket, or a mobile parked under trees. In this context, the following list prioritizes these needs. From these, then, we determined the optimum trade-offs to arrive at our final design and frequency requirements.
Igate uplink is relatively unconstrained.
Downlink to internet is relatively unconstrained. Spread of applications among multiple receivers to minimize collisions is desired. Reundancy and Backups are desired. Each KPC-9612 can cross relay from either of its two inputs to its two outputs. ALthough we need two 2m downlinks, two 2m uplinks and two 70cm uplinks, we have gone ahead and penciled in some obvious suggestions, so that the uniqueness of the choices is quite obvious.