Linx R4 Series Data Manual

Gps receiver module

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R4 Series

GPS Receiver Module

Data Guide

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Summary of Contents for Linx R4 Series

Page 1 R4 Series GPS Receiver Module Data Guide...
Page 2: Table Of Contents
ANSI and NFPA standards. It is solely the responsibility Module Description of any Linx customer who uses one or more of these products to Backup Battery incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application.
Page 3: Description
SMD package, the receiver requires no programming or additional RF components (except an antenna) to form a complete GPS solution. The module’s standard NMEA data output makes the R4 Series easy to integrate, even by engineers without previous RF or GPS experience.
Page 4: Ordering Information
1.8V Level Pin 1.85 Output Low Current RXM-GPS-R4-x R4 Series GPS Receiver Module MDEV-GPS-R4 R4 Series GPS Receiver Master Development System Output High Current TX Pin 0.05 EVM-GPS-R4 R4 Series GPS Receiver Evaluation Module x = “T” for Tape and Reel, “B” for Bulk 1.8V Level Pin...
Page 5: Pin Assignments
Figure 5: R4 Series GPS Receiver Pinout (Top View) throughout the day. A GPS receiver receives and times the signals sent by multiple satellites Pin Descriptions and calculates the distance to each satellite.
Page 6: Time To First Fix (Ttff)
Universal Time master clocks. This output and signals that are as low as –160dBm. The R4 Series can track up to 48 the time calculated from the GPS satellite transmissions can be used as a satellites at the same time.
Page 7: Antenna Considerations
Antenna Considerations Power Control The R4 Series module is designed to utilize a wide variety of external The R4 Series GPS Receiver module offers two power control modes: Full antennas. The module has a regulated power output which simplifies Power and Hibernate. In Full Power mode the module is fully active and the use of GPS antenna styles which require external power.
Page 8: Slow Start Time
• Read the NMEA data from the TX pin into a receive buffer. Protocols Linx GPS modules use the SiRFstar IV chipset. This chipset allows two • Separate it into six buffers, one for each message type. Use the protocols to be used, NMEA-0183 and SiRF Binary. Switching between the characters ($) and <CR>...
Page 9: Nmea Output Messages
NMEA Output Messages GLL – Geographic Position – Latitude / Longitude Figure 10 contains the values for the following example: The following sections outline the data structures of the various NMEA messages that are supported by the module. By default, the commands $GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52 are at 9,600bps, 8 data bits, 1 start bit, 2 stop bits, and no parity.
Page 10 RMC – Recommended Minimum Specific GPS Data Mode 1 Values Figure 14 contains the values for the following example: Value Description $GPRMC,053740.000,A,2503.6319,N,12136.0099,E,2.69,79.65,100106,,,A*53 Manual – forced to operate in 2D or 3D mode Recommended Minimum Specific GPS Data Example Automatic – allowed to automatically switch 2D/3D Name Example Units...
Page 11: Nmea Input Messages
NMEA Input Messages VTG – Course Over Ground and Ground Speed Figure 15 contains the values for the following example: The following outlines the serial commands input into the module for configuration. By default, the commands are input at 9,600bps, 8 data bits, $GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38 1 start bit, 2 stop bits, and no parity.
Page 12 100 – SetSerialPort 101 – NavigationInitialization This command message is used to set the protocol (SiRF binary or NMEA) This command is used to initialize the receiver with the current position (in and/or the communication parameters (baud rate). Generally, this X, Y, Z coordinates), clock offset, and time, enabling a faster fix.
Page 13 103 – Update Rate Control MSGValues This command is used to control the output of standard NMEA messages Value Description GGA, GLL, GSA, GSV, RMC and VTG. Using this command message, standard NMEA messages may be polled once, or setup for periodic output.
Page 14 105 – Development Data On / Off 104 – LLANavigationInitialization Use this command to enable development data information if you are This command is used to initialize the receiver with the current position having trouble getting commands accepted. Invalid commands generate (in lattitude, longitude and altitude coordinates), clock offset, and time, enabling a faster fix.
Page 15: Typical Applications
Typical Applications Master Development System Figure 27 shows the R4 Series GPS receiver in a typical application using a The R4 Series Master Development System provides all of the tools passive antenna. necessary to evaluate the R4 Series GPS receiver module. The system...
Page 16: Board Layout Guidelines
Board Layout Guidelines Each of the module’s ground pins should have short traces tying immediately to the ground plane through a via. The module’s design makes integration straightforward; however, it is still critical to exercise care in PCB layout. Failure to observe good Bypass caps should be low ESR ceramic types and located directly layout techniques can result in a significant degradation of the module’s adjacent to the pin they are serving.
Page 17: Microstrip Details
This is a critical factor, especially in automated assembly techniques. Since the modules contain discrete high-frequency products like Linx RF modules, because the trace leading components internally, the assembly procedures are critical to ensuring to the module’s antenna can effectively contribute to the length of the...
Page 18 RF Design Services within the limits mandated by the modules. The figure below shows the For customers who need help implementing Linx modules, Linx offers recommended reflow oven profile for the modules. design services including board layout assistance, programming, certification advice and packaging design.
Page 19 Under no circumstances shall any user be conveyed any license or right to the use or ownership of such items. ©2016 Linx Technologies. All rights reserved. The stylized Linx logo, Wireless Made Simple, WiSE, CipherLinx and the stylized CL logo are trademarks of Linx Technologies.