Linx-technologies RXM-GPS-R4 Manual do Utilizador

R4 Series GPS Receiver Module Data Guide

– – – –1415GSV – GPS Satellites in ViewFigure 13 contains the values for the following example:$GPGSV,3,1,12,28,81,285,42,24,67,302,46,31,54,3

– – – –1617VTG – Course Over Ground and Ground SpeedFigure 15 contains the values for the following example:$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*3

– – – –1819100 – SetSerialPortThis command message is used to set the protocol (SiRF binary or NMEA)and/or the communication parameters (baud

– – – –2021Update Rate Control Example1Name Example Units DescriptionMessage ID $PSRF103 PSRF103 protocol headerMsg 00 See Figure 22Mode 010=

– – – –2223104 – LLANavigationInitializationThis command is used to initialize the receiver with the current position (in lattitude, longitude

– – – –2425Typical ApplicationsFigure 27 shows the R4 Series GPS receiver in a typical application using a passive antenna.A microcontroller U

– – – –2627Board Layout GuidelinesThe module’s design makes integration straightforward; however, it is still critical to exercise care in PCB

– – – –2829Microstrip DetailsA transmission line is a medium whereby RF energy is transferred from one place to another with minimal loss. Thi

– – – –3031ResourcesSupportFor technical support, product documentation, application notes, regulatory guidelines and software updates, visit

DisclaimerLinx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to mak

Table of Contents 1 Description 1 Features 1 Applications 2 Ordering Information 2 Absolute Maximum Ratings 2 Electrical Specications 4 Pin As

– –1DescriptionThe R4 Series GPS receiver module is a self-contained high-performance GPS receiver. Based on the SiRFstar IV chipset, it provides

– – – –23Ordering InformationOrdering InformationPart Number DescriptionRXM-GPS-R4-x R4 Series GPS Receiver ModuleMDEV-GPS-R4 R4 Series GPS Re

– – – –45NC1NC21PPS3TX4RX5GND21NC61PPS7/RESET8RFPWRUP9ON_OFF10GND 20RFIN 19GND 18VOUT 17NC 16GND 22NC 15NC 14NC 13VCC 12VBACKUP 11Figure 5: R4

– – – –67Time To First Fix (TTFF)TTFF is often broken down into three parts:Cold: A cold start is when the receiver has no accurate knowledge

– – – –89Antenna ConsiderationsThe R4 Series module is designed to utilize a wide variety of external antennas. The module has a regulated po

– – – –1011Slow Start TimeThe most critical factors in start time are current ephemeris data, signal strength and sky view. The ephemeris data

– – – –1213NMEA Output MessagesThe following sections outline the data structures of the various NMEA messages that are supported by the modul