Note: After changing the PPP solution to APEX the demodulator will then require up to 30 minutes to reconverge and output a PPP position.
To change the PPP Service on an LD4 the software utility Septentrio Rx Tools is required, this software can be downloaded by clicking this link here.
Once the software utility is executed and connected to the LD4 the menu option to switch PPP service is found in the menu Navigation > Positioning Mode > PPP and Differential Corrections, then select the desired PPP service (note that the Apex service must be enabled on the unit):
The configuration now needs to be saved.
Open the Copy Configuration window in the File drop down menu. Select Source as Current and Target as Boot and click Apply: