Garmin 010-11018-00 - Mobile PC - GPS Software 기술 사양 - 페이지 6
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1.3 OVERVIEW
The GPS 20x includes an embedded receiver and an antenna. The GPS 20x tracks multiple satellites at a time while
providing fast time-to-first-fix navigation updates once per second. This generation of GPS sensors includes the
capability of FAA Wide Area Augmentation System (WAAS) differential GPS.
The GPS 20x design uses the latest technology and high-level circuit integration to achieve superior performance
while minimizing space and power requirements. The hardware capability combined with software intelligence
makes the GPS 20x easy to integrate and use.
The GPS 20x requires minimal additional components to be supplied by an OEM or system integrator. A minimum
system must provide the GPS with a source of power and a clear view of the GPS satellites. Internal FLASH
memory allows the GPS to retain critical data such as satellite orbital parameters, last-known position, date and
time. End user interfaces such as keyboards and displays are the responsibility of the application designer.
The GPS 20x interfaces to a computer with an available USB port. Drivers are available for use on Windows
®
computers. Macintosh
and Linux drivers are not available from Garmin. After the drivers are loaded, the device
appears to the Windows operating system as a USB-connected device and appears in Device Manager as a Garmin
USB Device.
1.4 FEATURES
•
GPS receiver tracks and uses multiple satellites for fast, accurate positioning and velocity estimates.
•
Differential DGPS capability using real-time WAAS corrections yields position errors of less than 3
meters.
•
Compact design is ideal for applications with minimal space.
•
Binary format data output over the USB interface transmits packets once per second. Refer to
Garmin Binary Output
•
Downloadable Spanner application allows the GPS 20x to output NMEA 0183 sentences. Refer to section
3.1 Transmitted NMEA 0183
•
FLASH-based program allows new software revisions through a Web site download.
•
Non-volatile memory does not require battery backup.
•
Onboard rechargeable backup battery can maintain the real-time clock for up to 10 days.
•
Configurable parameters include expected position, current time and date, and preferred position fix type
(3D or automatic).
190-00880-00
Format.
Sentences.
GPS 20x Technical Specifications
Page 3
®
Appendix B:
Rev. A