GPS Pod Setup

When a Power Reset is performed on the Allegro, the internal GPS pod loses factory settings for communication with AI applications. AI provides two utilities that allow you to reset the communication parameters of the internal GPS pod. If you use a u-blox compatible GPS receiver with the Allegro, reset communication parameters using the AMXU GPS Pod Setup utility. For all other GPS receivers (such as a Trimble GPS receiver), set communication parameters using the GPS Pod Setup utility.

Each of the following options on the GPSPodSetup screen are NMEA sentences that are sent from the satellites:

  • GGA – latitude, longitude, and elevation.

  • GSA – the DOP reading (dilution of precision). DOP values identify the accuracy of GPS readings. When a DOP value is zero (0), the GPS receiver does not report the value. When the value is between 1 and 3, GPS accuracy is good; under 2 is excellent. The Allegro records only the PDOP in the CeCi surveys. Readings under 5 are considered good; under 2 is excellent.

  • ZDA – time.

  • SBAS/WAAS – separate constellation of satellites that are used to get differentially corrected GPS.

To reset the communication parameters of the internal GPS pod, refer to one of the following topics: