1. Introduction
This document provides detailed information relating to the programming of
the DGPS MAX receiver, the Mini MAX receiver, the PowerMAX receiver,
the Vector, the Vector PRO, the Vector Sensor, the Vector Sensor PRO and
the Vector OEM board. Discussion of the programming includes data
message output and commands recognized by the internal GPS engine,
WAAS demodulator, OmniSTAR receiver, beacon sensor, e-Dif software,
menu system, Configuration Wizard, heading commands, binary commands
and other general commands.
This chapter summarizes three communication protocols and discusses the
different ways of communicating with your receiver.
1.1 Summary of Protocols
There are three main protocols that are used to communicate with all of the
receivers. They are: NMEA, Binary and RTCM. NMEA is in ascii format and
can be easily viewed using any terminal program on a PC. It is therefore very
user friendly. Binary data is inherently more efficient than NMEA, but it is
not possible to read it without special software. RTCM is the format used to
transmit and receive corrections to GPS data.
1.1.1 NMEA 0183
NMEA 0183 is a communications standard established by the marine
industry. It has found use in a variety of electronic devices, including GPS
and beacon receivers.
The National Marine Electronics Association publishes updates to the NMEA
0183 message standard. The latest NMEA 0183 standard is available
through:
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