I am preparing to wire the serial ports for my AFS4500. I would like to use a seperate GPS for the Lat/Long input so I can cross check the GNS-480 position. The following is the configuration I was thinking of using.

Serial Port # Device Data Format Label (GNAVx GPSx NAVx)
Serial Port #1 ARINC (480) ARINC GNAV 1
Serial Port #2 GTX-330 TFC/ICARUS
Serial Port #3 SL-30 SL-30 NAV 2
Serial Port #4 AFS GPS AFS GPS GPS 2

A couple question with this setup.
1. Will all of the information (except Lat / Long) from the GNS 480 come in over the ARINC? In other words will any navigation functions be lost from the GNS480 interface without the RS232 connection?

2. It is convienient to run the GPS 18X to serial port 4 because the +5VDC and ground are there to power it. Is it acceptable to run the ARINC to Serial port 1 or do I have to swap it with another component?

Bill Rogers