Garmin 010-11018-00 GPS 20x Technical Specifications - Page 8

1.5.3.4 Accuracy • GPS Standard Positioning Service (SPS) Position: < 15 meters, 95% typical Velocity: 0.1 knot RMS steady state • WAAS Position: Velocity: < 3 meters, 95% typical 0.1 knot RMS steady state • Dynamics: 999 knots velocity (only limited at altitude greater than 60,000 feet), 2g dynamics 1.5.4 Interfaces 1.5.4.1 GPS 20x Electrical Characteristics USB 2.0 full-speed protocol compatible, as well as USB 1.1 full-speed protocol. 1.5.4.2 Garmin Interface and Garmin USB Protocol Refer to the Garmin Device Interface Specification found in the Garmin Device Interface SDK for information about the Garmin Interface and the Garmin USB Protocol. At the time of this printing, this document is located on the Garmin Web site at: www.garmin.com/support/commProtocol.html. See Appendix B: Garmin Binary Output Format for additional information concerning access to binary data from the GPS 20x. Using Spanner (an application that can provide NMEA output via a virtual COM port), the GPS 20x can send NMEA 0183 output sentences. Spanner is available for free on the Garmin web site. To download the software, start at www.garmin.com/oem, select the GPS 20x, and then select Updates & Downloads. Available NMEA 0183 output sentences include GPGGA, GPGSA, GPGSV, GPRMC, and PGRMT (Garmin proprietary sentence). See section 3.1 Transmitted NMEA 0183 Sentences for format descriptions. 190-00880-00 GPS 20x Technical Specifications Page 5 Rev. A