Alternative radios for SwiftNav Piksi Multi RTK

[Tayler Brumble]

Hello swiftnav-discuss,

I am looking for a longer-range radio (up to 2 km) to use as a substitute for the Freewave 3DRs that came in the kit. I purchased a set of Laird CL4790 radios, and attempted to integrate them into my kit in the same fashion. Like the included radios, they also transmit at 900 MHz and interface with the Piksi multi through a RS232 DCE connection. I have programmed them to communicate over a serial connection with a 115200 baud rate, 8 bits, no parity, and 1 stop bit etc.

https://connectivity.lairdtech.com/wireless-modules/ramp-ism-modules/cable-replacement/cl4790-series

While attempting to test this setup, the behavior I'm seeing from the system confuses me. Every indicator on the radios suggests that they are communicating solidly (link light is on, base and rover radios show the appropriate TX/RX indicators). On the Piksi rover eval board, I see from the LINK LED that the eval board is receiving information from the base station. However, I do not see any of the base station/remote communication in the console. 

Could this be a software issue? I could use guidance on how to further investigate why this setup isn't working.

Regards,

Tayler

[Tayler Brumble]

After some more testing, it seems to reach RTK floating mode for about a minute and then cut out. 
I am getting GPS information from the base station, but so so infrequently. I would say about 95% of packets are dropped.