Xylem H-339 - Manual (Page 9)

1-4 Operation
H-339
First Time Acquire
Once the H-339 is installed and powered, the user can press the ‘Acquire’ button on the main
interface board to start an acquire operation, see figure # 1. The first time acquire may take longer
than normal as the position (location on earth) will be unknown. After the H-339 has acquired a
valid time and position, it will remember this location allowing it to acquire faster in the future. The
‘Status’ light will blink while it is trying to gain a fix to the satellites. Once it has locked on to 3 or
more satellites with sufficient signal strength, valid data will be available and the light will stay on
steady. After pressing the Acquire button the H-339 will try to acquire for approximately four
minutes.
If the H-339 does not acquire after using the ‘Acquire’ button a few times, then use the ‘GPS Utility’
software to see how many satellites are in view and what signal strength is coming from them. With
the ‘GPS Utility’ software running and a cable between the PC and the 9 pin connector on the
interface board, press the ‘Acquire’ button to start the process. The H-339 will try to acquire as long
as this software is running and the cable is connected. It is now possible to reposition the GPS
module to see if a better view of the sky can be found. See appendix B for an overview of the GPS
Utility software.