I have an Ag Leader 7500 unlocked to RTK (TerraStar-X) connected to an InCommand 1200.

But I want to connect it to a Yuma 2 tablet for data collection (SMS Mobile). A salesman where I bought the Yuma 2 said the (demo) unit I have was set up to receive an RTK-quality signal from an external source. The Yuma manual doesn't show how to do this...and a call to the seller reveals that this is Friday, after 5 PM local time. (Grrr...)

Has anyone done this or have any insight into getting a higher-quality signal into a Yuma 2? I hate to tear into it unless I know what I'm looking for. The 7500 material says it has three RS-232 ports, though I think this signal is on a single wire in a 14-wire connector. (I assume an adapter is in order.)

Pin 1 = COM1 TxD
Pin 3 = COM2 TxD
Pin 8 = COM3 TxD

Any help will be greatly appreciated.