Dual GPS setups

Digi radios can be configured with Digi’s XCTU program. You need a serial adapter of some kind to connect it to a computer. Digi sells a little board you can plug the modules into for programming. I use the 9Xtend hopping firmware on my radios. There are a number of parameters you can set like the vid and hopping channel (to prevent collisions with other 900 MHz signals).