There is a third controller. Advance Controller used in the simulcast models. Completely programmable from the key pad. Has audio delay built in for the simulcast delays. Watt meter and the software can set deviation, audio eq. frequency's. I am simulcasting a 350 watt and 100 watt on 2 meters.
http://www.n6icw.org/equip1.htm I use the rf shelf with a 902 Rx that come from the control hub of the system. The Advance Controller has a 4 character display. 16 button key pad for programing. PTT and Tx audio input using DB-25 socket on the side of the cabinet. Audio can be heard live direct off the controller at: http://72.245.148.218:8022/listen.pls Chris N6ICW