Scanning RTK Radio Frequency's Joel Dietrich Technical Support - Outback Guidance July 01, 2020 15:26 Updated Follow Related articles Using non-allocated frequencies with a repeater. A321/A221 is not transmitting RTK correctors to the rover. The A321 is not converging as a portable base station. A320/A321 Software Why is the top line of my A321 displaying SBAS instead of GNSS? Comments 0 comments Please sign in to leave a comment.