User's Manual

14 014-0030-00 Rev. G
5 GPS
In normal operation, the AP requires Global Positioning System (GPS) synchronization. The
GPS connector of the AP receives signals from its externally mounted antenna. The AP also
supplies approximately 3.3 VDC at up to 50 mA through the RF connector for best GPS
reception. No additional external DC connections are required. There is an internal current limit
function that is designed to limit the available current in the range of 100 mA to 150 mA. Since
there is DC power on the RF connector, keep in mind there should never be a DC short applied
to the GPS connector. However, the current limit should self-protect itself from shorts. If a
short is detected a software alarm is generated and the 3.3 VDC is removed from the GPS
connector.
NOTE: The AP must be power cycled to restore power to the GPS antenna.