Here are the details you requested:
- RM520N-GL has ANT1 for GNSS L5 and ANT3 for GNSS L1, how is this mapped to the SMA ports on X3000? I guss DIV / GNSS is ANT3, which SMA port is for GNS
The "DIV/GNSS" port is indeed ANT3. The correspondence between other antennas and ports is shown in the diagram below.
- btw is the PCB diagram GL-X3000(Spitz AX) disassembling/board diagram/UART pins - #6 by dohseven here correct? only 3 antenna leads shown
The WiFi uses 3 antennas in total: 2 external dual-band antennas (supporting 2.4GHz & 5GHz) and 1 internal 5GHz antenna.

