How do I set up cross corrections on an LD5 unit?

The following information details the steps required to configure X-RTCM corrections between two LD5 units.

1. Prepare two 9 way D-Type (male both ends) cross over cables with pins 2 and 3 crossing at either end:

1. Connect the cables to serial port one on the rear of both LD5 units. Then connect the other cable end to serial port three on the rear of both LD5 units.  (If ports 1 or 3 are not free port 2 could be used).
   
    
2. Check the software version of the LD5 unit by selecting ‘Config’ then ‘Config’:
   
   

For versions 5.0.0.17 and later (for earlier versions see below)

1. On the first LD5 unit enter the ‘Config’ menu from the home screen and then select ‘I/O’ from the next menu:
   
   
    
2. Select ‘COM1’ from the next menu, then on the Data Stream tab select ‘LBand RTCMa’ then ‘Next’:
   
   
    
3. On the next page select Protocol: RS232, Baud 9600, Data Bits: 8, Parity: None and Stop Bits: 1. Then select ‘Apply:
   
   
    
4. Return to the Config I/O page, and select ‘COM3’, then on the Data Stream tab select ‘Ext RTCM’, then ‘Next’:
   
   
    
5. On the next page select Protocol: RS232, Baud 9600, Data Bits: 8, Parity: None and Stop Bits: 1. Then select ‘Apply:
   
   
    
6. Once the unit has updated it will return to the Config I/O page, but now there will be an EXT RTCM tab available.
    
7.  Select the EXT RTCM tab and on the next page select RTCM Source: Veripos, then ‘Apply’:
   
   
    
8. Once the unit has updated it will return to the Config I/O page. Press the ‘Home’ button as the configuration on this unit is complete.
    
9. On the second LD5 unit repeat steps 1-8.
    
10. Once these steps are complete press the ‘Home’ button. The configuration is now complete, and X-RTCM should be available on both LD5 units. This can be tested by disabling the L Band corrections on the first LD5 unit, and ensuring that the Latency on the Orion display for this unit does not change. The L Band lock indicator on the Orion display should be red at this time. Once satisfied, re-enable the L Band corrections for this unit, and repeat the procedure on the second LD5 unit.

For versions 4.0.0.9 and earlier

1. On the first LD5 unit enter the ‘Config’ menu from the home screen and then select ‘Routing’ from the next menu:
   
   
    
2. Select ‘COM1’ from the next menu, then on the Data Stream tab select ‘LBand RTCMa’. then ‘Next’:
   
   
    
3. On the next page select Protocol: RS232, Baud 9600, Data Bits: 8, Parity: None and Stop Bits: 1. Then select ‘Apply’:
   
   
    
4. Return to the Config I/O page, and select ‘COM3’, then on the Data Stream tab select ‘Ext RTCM’, then ‘Next’:
   
   
    
5. On the next page select Protocol: RS232, Baud 9600, Data Bits: 8, Parity: None and Stop Bits: 1. Then select ‘Apply:
   
   
    
6. Once the unit has updated it will return to the Config I/O page, but now there will be a 3^rd-Party RTCM tab available.
    
7.  Select the 3^rd-Party RTCM tab and on the next page select EXT RTCM: On, then ‘Apply’:
   
   
    
8. Once the unit has updated it will return to the Config I/O page. Press the ‘Home’ button as the configuration on this unit is complete.
    
9.  On the second LD5 unit repeat steps 1-8.
    
10.  Once these steps are complete press the ‘Home’ button. The configuration is now complete, and X-RTCM should be available on both LD5 units. This can be tested by disabling the L Band corrections on the first LD5 unit, and ensuring that the Latency on the Orion display for this unit does not change. The L Band lock indicator on the Orion display should be red at this time. Once satisfied, re-enable the L Band corrections for this unit, and repeat the procedure on the second LD5 unit.