In order for the LD2 to provide a differential position and RTCM outputs, it must be locked to the correct communications satellite (referred to as “beam” or “channel”) for the current location.
The easiest way to check for lock is to observe the status of the Sync LED on the front panel.
If locked, the Sync LED will be steadily illuminated:
For more detailed information, and to determine which beam is selected, proceed as follows:
Repeatedly press *Page* until screen displays:
Press *Enter* and screen will display:
Press *Enter*, followed by *Page* to show:
Press *Enter* to access the Signal Status page:
This display is for an LD2 unit
This display is for an LD2S unit.
The displays show the following information:
Note: Possible displays for the lock indicator are shown below. For correct operation, all four diamonds must be displayed.
||Reference Lock – Indicates that the internal synthesiser is locked and is independent of the received satellite signal.
||Symbol Lock – Indicates that symbol lock has been acquired.
||Carrier Lock – Indicates that carrier lock has been acquired.
||Frame Synchronisation – Indicates that frame synchronisation has been acquired.