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Istruzioni per la prima installazione del modulo GPS.



Le righe seguenti sono un estratto delle pagine del Hytec GPS2092 Software user guide e descrivono le operazioni necessarie per la prima installazione del modulo GPS . Queste operazioni vanno eventualmente eseguite anche in caso di problemi nell' aggancio dei segnali dei satelliti.



2.8 RS232 Data Path Selection.

JP 11 and JP 12 are new jumpers fitted on issue 2.0 boards and are used to route the RS232 data communications from the GPS engine to the front-panel diagnostic port for use with an external PC running WINONCORE12, a package which allows fine tuning of the GPS installation not available through the firmware.

To use this feature, move JP11 and JP12 from their default position, which is ‘2-3’, to position ‘1-2’. Remember to move these back once you have finished with this mode !

Note that when these jumpers are in the ‘alternate’ position, the on-board micro still receives GPS messages and will operate normally.



2.9 Using WINONCORE12

Having downloaded the file gpsoc.exe (available from Hytec or a variety of free download sites on the Internet, e..g.: http://www.wmcs.net/download.htm), run it to install the package on your PC. Then connect one of your PC’s serial ports (COM1 is best) to the front panel diagnostic port on the GPS2092.

The front panel RS232 port must always be connected at 9600 baud. The data format is 8 data bits, no parity, 1 stop bit. The pinout of the connector is as follows:

Next, start WINONCORE12 and, last, switch on the VME crate.

If the small green LED along the bottom bar of the WINONCORE12 window starts flashing, the package has established communications and you can then select a variety of display windows to see progress on acquiring satellites and getting a position fix. The best windows are ‘SIGNAL QUALITY’ and ‘NAVIGATION’.

The signal quality window shows you which satellites are in view and being tracked and the navigation window tells you if a good position fix has been obtained.

Also, along the top bar, is a button called ‘SURVEY’. If you click this button after the engine has got a good fix – the NAVIGATION window will tell you if a 3D fix has been obtained.

Once the survey has been completed (about three hours) the engine will enter ‘position hold mode’ and give more precise timing information. It will also remember this selection through power cycles, since battery backup is provided by the 2092.