I've been trying to get an Echo UAT to talk to my 4500 - as a replacement for a NavWorx box. The output of the echo UAT is GDL-90 and 115k baud. I'm trying to figure out what format to configure in the 4500 so far with no success, it was previously port 3 ADSB-57Kbaud. There are a myriad of selections, but none say the baud rate or specifically gdl-90. Which should I be using?

Thanks!
Mark