Configuring a Verify DP Heading input on PORT3 Configuring a Verify DP Heading input through USB For LD2 What is the expected latency from one PPS to the ZDA telegram? Guia rápido do LD2 da VERIPOS (LD2 Quick Guide - Brazilian Portuguese) How can I change the IP address of my LD2(S) when using Verify-DP? How can I determine what L-band firmware versions are installed on the LD2/LD2S? How do I check the GLONASS option on my Topcon GNSS Receiver in an LD2 IMU? How do I check the L-band reception status of my LD2/LD2S demodulator? How do I check version number of my LD2? How do I configure a Position Output on port P1 of my LD2/LD2S? How do I configure my LD2 (Topcon GPS card) to output a ZDA and 1PPS string from Port 1 of the LD2? How do I configure my LD2 to use the Apex service? How do I manually select MF Stations on my LD2 IMU? How do I Remove Standard+ Service in my LD2/LD2S? How do I select MF or HF Auto Frequency on my LD2? How do I upgrade the GLONASS option on my Topcon GNSS Receiver? I have just changed beams and my station list is not fully populated why is this? LD2 DP Bridge Card LD2 Installation Manual LD2 Operations Manual LD2 Quick Guide LD2 Setup - Configuring PPS & ZDA Output from Topcon GPS Card Selecting An LD2 L-band Beam What are the tracking capabilities of my LD2 and what services are available to my unit? What data is available on the LD2 Ethernet port? What do the status LED's on the front panel of the LD2 show? What is demodulator Channel 16 used for and how I configure it? What NMEA telegrams are available for output from the LD2/LD2S?

How do I configure my LD2 (Topcon GPS card) to output a ZDA and 1PPS string from Port 1 of the LD2?

There are two options available to enable the PPS output from the LD2 fitted with a Topcon GPS card.

Warning: This procedure is for LD2 units equipped with Topcon GPS receivers only. It will NOT work with Ashtech equipped units.

Option 1 - Using Topcon PC-CDU software to check the PPS status on the LD2 and configuring the PPS/ZDA output. A document outlining the procedure to do this is available at the bottom of this article.

Option 2 - Topcon script files, are available from VERIPOS Helpdesk which will enable the LD2 to output a ZDA with a 1PPS on port 1 of the LD2.

To upload the file, connect a PC using a serial port (preferably not using a digi port) to port 5 or Port 3 (if Port 3 switch is fitted to rear panel) of the LD2, ensure that port 5 of the LD2 is set to "REMOTE" mode (Configuration > Serial Ports > P5) or ensure Port 3 switch is set to GPS.  Open PCCDU on the PC and connect.  In the menu go to File > Manual Mode.  This will open a dialog box, select Load Script and navigate to the location of the script file and press Open.  Then select the Send Script button. You should see the script load on the screen.

This should enable the 1 second PPS and ZDA on port 1 of the LD2.


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