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R4 Series

GPS Receiver Module

Data Guide

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Содержание R4 Series

Страница 1: ...R4 Series GPS Receiver Module Data Guide...

Страница 2: ...egulatory certification and warranty Customers may use our non Function Modules Antenna and Connectors as part of other systems in Life Safety Situations but only with necessary and industry appropria...

Страница 3: ...us RF or GPS experience Features SiRF Star IV chipset Built in jammer remover High sensitivity 160dBm 48 channels Fast TTFF at low signal levels Battery backed SRAM CGEE allows 3 day prediction No pro...

Страница 4: ...Supply Operating Voltage VCC 3 0 3 3 3 6 VDC Supply Current lCC Peak 122 mA 1 Acquisition 56 mA 1 Tracking 33 mA 1 Hibernate 0 43 mA 1 Backup Battery Voltage VBAT 2 0 6 0 VDC Backup Battery Current IB...

Страница 5: ...satellite transmits low power radio signals which contain three different bits of information a pseudorandom code identifying the satellite ephemeris data which contains the current date and time as...

Страница 6: ...then outputs the data through a standard serial port using several standard NMEA protocol formats The GPS core handles all of the necessary initialization tracking and calculations autonomously so no...

Страница 7: ...RFIN line This bead prevents the RF from getting into the power supply but allows the DC voltage onto the RF trace to feed into the antenna A series capacitor inside the module prevents this DC volta...

Страница 8: ...have selectable baud rates it s recommended that SiRF Binary use 115 200bps For a detailed description of the SiRF Binary protocol see the SiRF Binary Protocol Reference Manual available from SiRF Tec...

Страница 9: ...rential GPS SPS Mode fix valid 3 5 Not supported 6 Dead Reckoning Mode fix valid Figure 9 Position Indicator Values GLL Geographic Position Latitude Longitude Figure 10 contains the values for the fol...

Страница 10: ...s Channel 4 Range 00 to 90 Azimuth 077 degrees Channel 4 Range 00 to 359 SNR C No 46 dB Hz Channel 4 Range 00 to 99 null when not tracking Checksum 73 CR LF End of message termination 1 Depending on t...

Страница 11: ...Figure 17 outlines the message identifiers supported by the module Serial Data Structure Name Example Description Start Sequence PSRF Message ID MID Message Identifier consisting of three numeric cha...

Страница 12: ...alization This command is used to initialize the receiver with the current position in X Y Z coordinates clock offset and time enabling a faster fix Increased receiver sensitivity and the removal of S...

Страница 13: ...ssages may be polled once or setup for periodic output Checksums may also be enabled or disabled depending on the needs of the receiving program NMEA message settings are saved in battery backed memor...

Страница 14: ...ault value of 96000 is used Figure 24 ResetCfg Values ResetCfg Values Hex Description 0x01 Hot Start All data valid 0x02 Warm Start Ephemeris cleared 0x04 Cold Start Clears all data in memory 0x08 Cle...

Страница 15: ...e is also included for use with a PC running custom software or the included development software The Master Development System software enables configuration of the receiver and displays the satellit...

Страница 16: ...r the module A ground plane as large and uninterrupted as possible should be placed on a lower layer of your PC board opposite the module This plane is essential for creating a low impedance return fo...

Страница 17: ...ackage that supports hand and automated assembly techniques Since the modules contain discrete components internally the assembly procedures are critical to ensuring the reliable function of the modul...

Страница 18: ...irreparably damage the modules Assembly personnel need to pay careful attention to the oven s profile to ensure that it meets the requirements necessary to successfully reflow all components while sti...

Страница 19: ...stomer including without limitation breach of contract breach of warranty strict liability or negligence Customer assumes all liability including without limitation liability for injury to person or p...

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