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1. RF connector feed l Figure 14 RF connection to antenna feed of the JP7 T GPS receiver This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 47 GPS RECEIVER JP7 T VERSION 1 04 To make a proper antenna connection to the antenna pads available on bottom side of JP7 TC 2 only refer to the figure below which shows their position and pin name refer also to table 6 a v e o o e H e e o RF_IN RF_GND RF_GND e oe o D e III I e D 1 25 SS 2 amp Ki ki A A Ki e Ki e La RFfeed 6 SEA antenna pads Figure 15 RF connection to antenna feed of the JP7 TC 2 GPS receiver Recommendations for layout and soldering Please note that the dimension tolerance is 0 1 mm BE k em 0 8 a seat men Em mm my 2 8 a oY mee Keel 25 4 a aay a Est Pe Een m Em See Een 1 277 ay 1 5 y 25 4 ki gt Figure 16 Recommendations for layout This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 48 GPS RECEIVER JP7 T VERSION 1 04 Recommended soldering reflow profile for JP T family mounting on PCB A 10 sec
2. Hex ASCII Name Description 0x 8F 143 Static Navigation Configuration for static operation 0 x 90 144 Poll Clock Status Poll Polls the clock status 0x91 145 Set DGPS Serial Port DGPS port baud rate data bits stop bits and parity 0x92 146 Poll Almanac Polls for almanac data 0x 93 147 Poll Ephemeris Polls for ephemeris data 0x 94 148 Flash Update On the fly software update 0x 95 149 Set Ephemeris upload Sends an existing ephemeris to the receiver 0 x 96 150 Switch Operating Mode Test mode selection SV ID and period 0x97 151 Set Trickle Power Push to fix mode duty cycle and on Parameters time 0x 98 152 Poll Navigation Parameters Polls for the current navigation parameters 0x A5 165 Set UART Configuration Protocol selection baud rate data bits stop bits and parity 0x A6 166 Set Message Rate SiRF binary message output rate OxA7 167 Low Power Acquisition Low power configuration Parameters parameters 0x B6 182 Set UART Configuration Obsolete Table 8 SiRF Input Messages 7 2 NMEA data message The SiRFstarlle evaluation receiver is capable of outputting data in the NMEA 0183 format as defined by the National Marine Electronics Association NMEA Standard for Interfacing Marine Electronic Devices Version 2 20 January 1 1997 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 41 GPS RECEIVER JP7 T VERSION 1 04 7 2 1 NMEA out
3. without characters and Index first checkSum 0 while index lt msgLen checkSum checkSum message index checkSum checkSum AND 2 1 Note All fields in all proprietary NMEA messages are required none are optional All NMEA messages are comma delimited This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 43 GPS RECEIVER JP7 T VERSION 1 04 8 Mechanical draw The following chapters describe the mechanical dimensions of JP7 T family and give recommendations for integrating JP7 T family into the user application Note that the absolute maximum dimension for all modules JP7 T JP7 TB JP7 TC 1 JP7 TC 2 is 25 4 mm x 25 4 mm L x B Figure 9 shows the top view on JP7 T family without connectors and provides an overview of the mechanical dimensions of the board Please note that the JP7 T family has a dimension tolerance from 0 1 mm 25 4 mm
4. Abbreviation Description DGPS Differential GPS DOP Dilution of Precision SDI SDO A P BERGERE ml ee S Selective Availability Wide Area Augmentation System 8 0 4 Related documents it Key Printed Circuit Board D SC 1 SiRF binary and NMEA protocol specification http www falcom de service downloads manual SiRF SiRFmessages pdf 2 SiRF demo software and manual http www falcom de service downloads manual SiRF SiRFdemo pdf http www falcom de service downloads manual SiRF SiRFdemo zip This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 7 GPS RECEIVER JP7 T 0 5 Order options VERSION 1 04 Before you start up the receiver make sure that your package includes the following items If any item is missing or damaged please contact your vendor immediately According to your requirements you can choose the desired unit In the figure below the available components are marked with red colour In order to have a clear view and to detect the required option of JP7 T family imaged below please print this page with a colour printer JP7 T family bottom side amp Fatcom GPS RECEIVER gt JP7 T WINNT 000073 made in E C TOP SIDE The table below contains the order options of JP7 T family JP7 TC 1 JP7 TC 2 30 pin out on the left and right side of JP7 T are available for use 4
5. Transport device in ESD shielded containers Monitor and test all ESD protection equipment Treat the JP7 T family GPS receiver as extremely sensitive to ESD This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 10 GPS RECEIVER JP7 T VERSION 1 04 2 Safety standards The GPS receiver meets the safety standards for RF receivers and the standards and recommendations for the protection of public exposure to RF electromagnetic energy established by government bodies and professional organizations such as directives of the European Community Directorate General V in matters of radio frequency electromagnetic energy This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 11 GPS RECEIVER JP7 T VERSION 1 04 3 GPS basics principle 3 1 Signal Processing Operation The major parts of JP7 T Signal Processing Antenna input spor Output GPS spe data GRF2i LP 123 GSP2e LP RF acc Signal Front End c Processor Address Bus FLASH Data Bus 8MBit GPS software The JP7 T family is designed to use L1 Frequency C A Code The module is separated into four major parts RF frequency down converter digital baseband demodulation embedded ARM microprocessor and internal GPS software stored on board 8 MBits Flash Memory The RF frequ
6. max 1000 Set the time which will be spent for tracking dc 10 msot numeric the on Time in milliseconds Possible value 200 900 Set the time duration of each tracking period XX Ai Checksum has to be calculated in hexadecimal Example SPSRF107 0 200 200 3D The receiver will be set in Trickle Power mode where 20 of time it will spend for tracking and the tracking period will takes 200 msec Table 1 Example of Trickle Power Mode Control Note If the receiver is set into the Trickle Power Mode the high data rate transmission is recommended as suitable This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 21 GPS RECEIVER JP7 T VERSION 1 04 Computation of Duty Cycle and On Time The Duty Cycle is the desired time which will be spent for tracking The On Time is the duration of each tracking period range is 200 900 msec To calculate the Trickle Power update rate as a function of Duty Cycle and On Time use the following formula On Time Duty Cycle On Time Off Time Duty Cycle Update rate Off Time On Time Hint It is not possible to enter an On Time gt 900 msec Following are some examples of selections Mode On Time msec Duty Cycle Update Rate 1 Hz Continuous 1000 100 1 Trickle Power 200 20 1 Trickle Power 200 10 2 Trickle Power
7. GPS RECEIVER JP7 T VERSION 1 04 9 LAYOUT RECOMMENDATION uuu cccetteeerenseeeee 47 9 1 GROUND PLANES eet cosets PEKEE ESEE EEEE EEEE EEE EEEE E EEEE EEES 47 9 2 RE CONNECTION iss ENEE TE EE EEE SEE TEENE EE EE EE E EENES N 47 10 FIRST STEPS TO MAKE IT WORK 50 11 1 BOARD TO BOARD CONMNEPCTOR 53 LE RE CONNECTOR 955 ssscssi ccscssceaccanssscesevsiesedneatssabensdedvonsetsesievscetcougoiedsdensssdvotcndesdbarsdedcdtyols tebersdedieavade 53 11 3 FIRMWARE INTERFACE sssccssssscssscssssccnsvssessssscssecssssceavssssssssssecssssessasssssasosensecessnesnessesnasseseeeceees 54 11 4 XTRAC FIRMWARE DESCRIPTION cccscessesecssesscssesscsseescesecssesecsessscsesescsaecesesecsussecnesesesseeesenecanenss 54 11 4 1 SiRFXTrac2 firmwares default settmnges ce eecesecsessecseeeeceeeeecesecseesecaessessecaeeseenaseeeaeeeeeaeeas 54 RR 2 RT EE 55 Version history Version number Author Changes 1 00 Fadil Beqiri Initial version 1 01 Fadil Beqiri The signal names of serial ports updated New section 0 XTrac software description added CheckSum calculation added A complete update implemented 1 02 Fadil Beqiri Chapter 11 3 updated 1 03 Fadil Beqiri Chapter 5 4 added APM mode The serial ports of JP7 T family are 3 3 V CMOS only and not 5 V TTL compatible The GPIOl pin on all GPS units operating with SiRFXTrac2 fimware can be used to control the validity of GPS receiving data See added note
8. 0 2 Scope of the user s manual This document describes the hardware interface and the technical specifications of the JP7 T It is also the preliminary data sheet for the electrical and mechanical device application design As far as JP7 T family concept is concerned there are three different JP7 T GPS Receiver Modules available The difference between these receivers can be recognized by looking on the bottom side of the module see attached picture on the chapter 0 5 Order option To choose a unit it depends on the customer requirements JP7 T JP7 TB JP7 TC 1 JP7 TC 2 RF Part TCXO 25 5535 MHz 25 5535 MHz 25 5535 MHz 25 5535 MHz Active antenna power built in built in built in built in control U FL R SMT No RF RF connector Not available Not available plug antenna LEO connector from Hirose Solder pads only Digital Part 50 pin Hirose 50 pin Hirose DF12C Board Connector Not available Not available DF12C Board To Board connector To Board connector Balls Not available 48 Balls are ee eee en available In this manual user will not find separately description for each option of devices The interfaces pin out and some application s example are the same for all devices This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 6 GPS RECEIVER JP7 T VERSION 1 04 0 3 Used abbreviations
9. V_ANT This pin is an input and reserved for an external DC power supply for an active antenna The antenna bias for an external active antenna can be provided in two ways to pin V_ANT In order to use a 5 V or 12 V active GPS antenna the V_ANT has to be connected to 5 V 12 V external power supply respectively The other possibility is available when you connect the VC3 0 output which provides 3 0 V to V_ANT so that an antenna with 3 0 V supply voltage can be used Hint The input voltage on the V_ANT should be chosen according to the antenna to be used Note The GPS receiver JP7 T family has to be connected to an active GPS antenna with a max current 25 mA VC3 0 This pin is an output which provides 3 0 V DC and can be connected to the V_ANT to supply the connected GPS antenna In Trickle Operation and Push To Fix operation VC3 0 is switched off when the receiver sets itself into the sleep mode When the receiver wakes up the VC3 0 is switched on This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 37 GPS RECEIVER JP7 T VERSION 1 04 6 8 4 General purpose input output Several I O s GPIOO GPIO1 GPIO3 GPIO5 GPIO6 GPIO7 GPIO10 GPIO13 GPIO14 GPIO15 please refer to the tables 4 5 6 of the CPU are connected to the hardware interface connector of the JP7 T family They are reserved for customer specific applications For example For realiz
10. Not used currently reserved for expansion POWER_ 1 5 1 5 Percent Power Duty Cycle defined as 10 DUTY_CYCL 3 15 the time in full power to total E operation time 1 gt 20 duty cycle is this value 5 TIME DUTY 1 Time Power Duty cycle priority 11 _CYCLE Bits 0x01 Time between two 0 1 consecutive fixes has priority 0x02 Power Duty cycle has higher priority Bits 2 7 reserved for expansion Spare Byte 2 1 Reserved for expansion 12 1 lt A value of zero for the NUM FIXES value indicates that continuous APM cycling is requested APM will continue to cycle until power is removed or a new APM command is received 2 The bounds for the TIME BTW_FIXES value for the APM is limited from 10 s to 180 s This is slightly different than the message limits This range may be expanded or the next byte may be used for expansion to further extend this range in the future 3 Ifa duty cycle of 0 is entered it will be rejected as out of range If a duty cycle value of 20 is entered the APM module will be disabled and continuous power operation will resume Value Position Error in meters 0x00 lt 1 meter 0x01 lt 5 meters 0x02 lt 10 meters 0x03 lt 20 meters 0x04 lt 40 meters 0x05 lt 80 meters 0x06 lt 160 meters 0x07 No maximum 0x08 Reserved This confidential document is the property of FALCOM GmbH and may not be copied or circula
11. Regarding to the figure below SiRFdemo software version 3 61 Low Power dialog box a brief description is added in the table above APM parameters Please refer to the corresponding numbers assigned in the last column of the table above APM parameters x Status Done Polling Mode APM Disable Continuous Model APM Enable Power Saving Mode Num APM Cycles Before Sleep 0 255 0 ID cycles means unlimited APM cycles APM Settings 3 4 Time Between Fixes 10 180 sec 30 i Power Duty Cycle 50 Timing Priority Preference Time Between E Accuracy amp Timing Max Response Time 0 255 sec Max Requested Horiz Error Max Requested Vert Error Figure 4 Low power XTrac dialog box 5 5 NMEA input message for Trickle Power Mode The input command message below sets the FALCOM JP7 T family into the Trickle Power Mode or Push To Fix Mode Details to configure Trickle Power Mode and Push To Fix Modes are described below The receiver accepts the input message with following format PSRF107 lt parameter gt lt parameter gt lt parameter gt lt Checksum gt lt CR gt lt LF gt EE DESCRIPTION PSRF107 Parameters description ptf ptf numeric performs the receiver in one of two pre defined modes dc Possible values msot 0 Set the receiver in Trickle Power mode XX 1 Set the receiver in Push To Fix mode lt CR gt lt LF gt dc Ai numeric Duty Cycle in percent Possible value
12. gt Figure 9 The mechanical draw of the JP7 T family This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 44 3 20 mm GPS RECEIVER JP7 T 4 70 mm 5 70 mm 6 70 mm VERSION 1 04 Figure 10 shows the bottom view on JP7 TB and provides an overview of the mechanical dimensions of the pointed balls 8 20 mm 22 20 mm 20 70 mm 17 20 mm 18 70 mm 19 70 mm 15 70 mm 14 20 mm 12 70 mm 11 20 mm 9 70 mm 23 70 mm S 22 70 mm 14 20 mm seg lt 12 70 mm 11 20 mm H 9 70 mm 8 20 mm pe eee 6 70 mm GT oiid 5 20 mm cel 4 20 mm g 3 70 mm ee a ei 2 70 mm 1 70 mm ag L Round ball diameter 2 20 mm Square ball dimentions Figure 10 2 20 mm The mechanical draw of the JP7 TB This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 45 GPS RECEIVER JP7 T VERSION 1 04 Figure 11 shows the bottom view on JP7 TC 1 2 and provides an overview of the mechanical dimensions of the integrated 50 pin connector and RF connector Figure 11 The mechanical draw of the JP7 TC 1 12 7 mm lt Le 20 25 mm l 21 7 mm J 23 20 MM J GI 1 00 mm Round ball
13. 7 1 SiRF binary data message Table 7 lists the message list for the SIRF output messages Hex ASCII Name Description 0x02 2 Measured Navigation Data Position velocity and time 0x03 3 True Tracker Data Not implemented 0 x 04 4 Measured Tracking Data Satellite and C No information 0 x 06 6 SW Version Receiver software 0x07 7 Clock Status Current clock status 0x 08 8 50 BPS Subframe Data Standard ICD format 0x 09 9 Throughput Navigation complete data 0x 0A 10 Error ID Error coding for message failure 0x 0B 11 Command Successful request Acknowledgement 0x 0C 12 Command No Unsuccessful request Acknowledgement 0x 0D 13 Visible List Auto Output 0x OE 14 Almanac Data Response to Poll 0 x OF 15 Ephemeris Data Response to Poll 0x10 16 Test Mode 1 For use with SiRFtest Test Mode 1 0x11 17 Differential Corrections Received from DGPS broadcast 0x12 18 Ok To Send CPU ON OFF Trickle Power 0x13 19 Navigation Parameters Response to Poll 0x14 20 Test Mode 2 Additional test data Test Mode 2 0x 1C 28 Nav Lib Measurement Data Measurement Data This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 39 GPS RECEIVER JP7 T VERSION 1 04 Hex ASCII Name Description 0x 1D 29 Nav Lib DGPS Data Differential GPS Da
14. UO Description Level 1 VCC I Supply voltage 3 3 V DC5 2 GND Digital ground A BOOT_SELECT I Boots in update mode if high CMOS 4 SDI I Serial Data Input A CMOS 5 SDO1 O Serial Data Output A CMOS 6 SDO2 O Serial Data Output B CMOS 7 SDI2 I Serial Data Input B CMOS 8 GPIO3 LO See chapter 6 8 4 9 RF_ON O Highif RF part on RF chip is on CMOS 10 GND Digital ground 11 RF GND Analog ground 12 RF GND Analog ground 13 RF GND Analog ground 14 RF GND Analog ground 15 RF GND Analog ground 16 RF GND Analog ground 17 RF_IN I GPS signal from connected 50 Ohms antenna 1 575 GHz This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 29 GPS RECEIVER JP7 T VERSION 1 04 6 7 Balls assignment of the JP7 TB Figure 6 Ki v Wl 37 35 33 31 29 27 25 S 36 34 32 30 28 26 Q Lei ZG ei N ZS wen 3 Ze S a No ara Ze om EI Ee Om ee en e ee Ln on 2 BI a l o D EI 2 4 6 8 210 12 La Ki a Ki E La 1 3 5 7 9 11 13 Balls assignment of the JP7 TB Pin Name UO Description Level 18 RF GND Analog ground 19 V_ANT I Power supply for active antenna upto 12 V DC 20 VC3 0 O Supply voltage of RF section 3 0 V DC 21 V_BAT I Power for RTC and SRAM 3 V DC 45 22 RESET N I Resets the unit if active LOW CMOS 23 GPIO10 LO See chapter 6 8 4 CMOS 24 GPIO6 UO See chapter 6 8 4 CMOS 25 GPIO5
15. following settings on serial interfaces SDH SDO1 first serial port NMEA 4800 baud Msg GLL GGA RMC GSV GSA without VTG 8 data bits no parity 1 stop bit SDI2 SDO2 second serial port RTCM 4800 baud 11 4 2 Order options As far as the SiRFXTrac2 firmware is concerned the products listed below with specific requirements are also available upon request Using firmware Name Options version JP7 TX SiRFXTrac2 30 pin out on the left and right side of JP7 T are available for use JP7 TBX SiRFXTrac2 48 Balls are available for use JP7 TCX 1 SiREXTrac A 50 pin connector and a RF connector are bd available for use O z A 50 pin connector and solder pads for an a antenna cable are available for use ete Re ae There is no antenna cable included in the delivery package This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 55
16. not be copied or circulated without permission Page 31 GPS RECEIVER JP7 T VERSION 1 04 Ball Name UO Description Level 2a GND Digital ground 28 GND Digital ground 29 GND Digital ground 30 GND Digital ground 31 Vcca O Control output for RF part ie ee N el 32 GPIO3 UO See chapter 6 8 4 CMOS 33 SDI2 I Serial Data Input B CMOS 34 SDO2 O Serial Data Output B CMOS 35 SDO1 O Serial Data Output A CMOS 36 SDI I Serial Data Input A CMOS 37 BOOT SELECT I Boots in update mode if high CMOS 38 GND Digital ground 39 VCC I Main power supply 3 3 V DC 5 30 VCC I Main power supply 3 3 VDC 5 41 GND Digital ground 42 RFPC1 O Control output for Trickle 2 85 V DC Power Mode max 25 mA sl wn ae ed zez 44 GPIOI5 UO See chapter 6 8 4 CMOS 45 GPIO14 UO See chapter 6 8 4 CMOS 46 GPIO13 UO See chapter 6 8 4 CMOS 47 T MARK O 1 PPS Time Mark Output CMOS not supported by SiRFXTrac software 48 GND Digital ground Table 7 Pin assignment of the JP7 TB This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 32 GPS RECEIVER JP7 T VERSION 1 04 6 8 Pin assignment of the 50 pin connector i 50 26 i 8 E dk o p e BI S Ka z S 5 Ka j o lt x e x E E 3 j D i e j Ce g 3 SLELLLELL DI KKK Connector antenna pads Figure 7 Pin out of t
17. 2 firmware is able to track the GPS signals at an extremely small level by 16 dBHz In addition higher sensitivity allows it more flexibility onits design the placement of the antenna and the selection of the kind of antenna The GPS receiver continuously tracks all satellites in view thus providing accurate satellite position data The highly integrated digital receiver uses the SiRFstarll Low Power chipset The internal GPS software completes the package providing flexible system architecture for standalone GPS based products In order to save space on the application platform the FALCOM JP7 T family comes as an extremely slim and compact module This makes it ideally suited for a broad range of mobile computing devices and particularly offers easy integration with smart phones PDAs and other handhelds The FALCOM JP7 T family is also designed to be an entire product such as an AVL tracking unit handheld GPS Please consult SiRF www sirf com for special information about the SiRFstarII Low Power chipset FALCOM GPS RECEIVER JP7 T HU UN OOOO Z 3 made in E C Figure 1 The FALCOM JP7 T family GPS receiver top side and bottom view This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 5 GPS RECEIVER JP7 T VERSION 1 04 Users are advised to proceed quickly to the chapter Security and read the hints carefully to secure its optimal use
18. 300 10 3 Trickle Power 500 5 10 Table 2 Example of Selections for Trickle Power Mode of Operation Update Rates seconds 6 7 On Time msec 200 300 400 500 600 700 800 900 y cs sissy N sys amp KIAIA AAAA S KIAIA AAAA Li ASAA AASS SAAS AISIA aAa 90 seyss oe sys ASSESS Table 3 Trickle Power supported Modes Push To Fix In this mode the receiver will turn on every 30 minutes to perform a system update consisting of a RTC calibration and satellite ephemeris data collection if required i e a new satellite has become visible as well as all software tasks to support SnapStart in the event of an NMEA Ephemeris collection time in general takes 18 to 30 seconds If ephemeris data is not required then the system will re calibrate and shut down In either case the amount of time the receiver remains off will be in proportion to how long it stayed on On Period 1 Duty Cycle Off period Duty Cycle This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 22 GPS RECEIVER JP7 T VERSION 1 04 The off period has a possible range between 10 and 7200 seconds The default is 1800 seconds Comparison A comparison of the Trickle Power and Push to Fix modes is shown in Figure below This diagram shows that for position
19. 8 Balls are available for use A 50 pin connector and a RF connector are available for use Name JP7 T JP7 TB JP7 TC 1 JP7 TC JP7 TC 2 A 50 pin connector and solder pads for an antenna cable are available for use There is no antenna cable included in the delivery This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 8 GPS RECEIVER JP7 T VERSION 1 04 1 Security This chapter contains important information for the safe and reliable use of the GPS receiver Please read this chapter carefully before starting to use the GPS receiver 1 1 General information The Global Positioning System uses satellite navigation an entirely new concept in navigation GPS has become established in many areas for example in civil aviation or deep sea shipping It is making deep inroads in vehicle manufacturing and before long everyone of us will use it this way or another The GPS system is operated by the government of the United States of America which also has sole responsibility for the accuracy and maintenance of the system The system is constantly being improved and may entail modifications effecting the accuracy and performance of the GPS equipment 1 2 Restricted use Certain restrictions on the use of the GPS receiver may have to be observed on board a plane in hospitals public places or government institutions laboratories etc Follow these in
20. During the subsequent background cycles or when a user requests a position update the RESET N has to be used a reset is generated and a hot start will be typically performed which may take up to a maximum of 8 seconds The receiver wakes up computes its position fix and goes back to the previous sleep phase again 5 4 Advanced Power Management APM SiRFXTrac version 2 0 supports a form of software power management called Advanced Power Management APM Please note that the Trickle Power and Push to Fix modes described on the chapters 5 2 and 5 3 here are not supported APM is a software power management solution designed to reduce the overall power consumption of the JP7 T family JP7 TX operating with SiRFXTrac version 2 0 software The actual operation of APM and power saving is very dependant on two things 1 The available satellite signal strength e Available signal strength will effect the behavior of APM as APM will keep the receiver operating in full power until a position fix is possible before shutting down to conserve power The lower the signals available the longer the receiver must remain on to obtain a position fix This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 16 GPS RECEIVER JP7 T VERSION 1 04 2 and whether power consumption has priority over the expected time between fixes e If power consumption or duty cycle is priority the receiver w
21. E e N Square pads for an antenna cable Figure 12 The mechanical draw of the JP7 TC 2 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 46 GPS RECEIVER JP7 T VERSION 1 04 9 Layout recommendation 9 1 Ground planes JP7 T GPS receiver needs two different ground planes The pins RF_ GND Pins 11 12 13 14 15 16 18 shall be connected to analog ground the pins GND Pins 2 10 30 to digital ground The two ground planes shall be separated the planes are connected inside the receiver see Figure 13 connected internally N A Digital GND Analog GND Figure 13 Ground plane of the JP7 T family GPS receiver 9 2 RF connection The JP7 T family GPS receiver is designed to be functional by using either a passive patch antenna or an antenna connector with standard RF cables In order to make a RF connection properly the user has to connect the antenna points or the pins of the connector to the RF pin pin 17 and RF grounds GND s of RF part respectively see Figures 13 and 14
22. Electrical Characteristics 6 5 1 1 General Frequency C A code Channels 6 5 1 2 Accuracy Position Velocity Time time 6 5 1 3 DGPS Accuracy Position Velocity 6 5 1 4 Datum WGS 84 6 5 1 5 Time to First Position Hot start Warm start Cold start 6 5 1 6 Sensitivity Tracking Hot Start Warm Start Cold Start VERSION 1 04 L1 1575 42 MHz 1 023 MHz chip rate 12 10 meters CEP without SA 0 1 meters second without SA 1 microsecond synchronized to GPS 1 to 5 meters typical 0 05 meters second typical lt 4 sec average lt 35 sec average lt 45 sec average The values listed above are available by using the SiRFXTrac2 firmware only 16 dBHz 23 dBHz 28 dBHz 32 dBHz The sensitivity value is specified at the correlator On a JP7 T Evaluation Receiver using SiRFXTrac2 firmware with the supplied antenna 32 dBHz is equivalent to 142 dBm or 172 dBW Other board and antenna characteristics will vary 6 5 1 7 Acquisition Rate Snap start Hot start Warm start Cold start lt 3 sec average lt 8 sec average lt 38 sec average lt 45 sec average This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 27 GPS RECEIVER JP7 T 6 5 1 8 Dynamic Conditions Altitude Velocity Acceleration Jerk 6 5 1 9 DC Power Main power Continuous mode Backup battery power 6 5 1 10 Serial Port Electrical interface P
23. LO See chapter 6 8 4 CMOS 26 GPIO7 UO See chapter 6 8 4 CMOS 27 GPIOO UO See chapter 6 8 4 CMOS 28 GPIO1 UO See chapter 6 8 4 CMOS 29 T MARK O One pulse per second CMOS not supported by SiRFXTrac software 30 GND Digital ground Table 4 Pin assignment of the JP7 T This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 30 GPS RECEIVER JP7 T VERSION 1 04 Ball Name UO Description Level 1 GPIO1 UO See chapter 6 8 4 CMOS 2 GPIOO LO See chapter 6 8 4 CMOS 3 GPIO7 UO See chapter 6 8 4 CMOS 4 GPIO5 UO See chapter 6 8 4 CMOS 5 GPIO6 UO See chapter 6 8 4 CMOS 6 GPIO10 LO See chapter 6 8 4 CMOS 1 RESET _ N I Reset the unit if Active Low CMOS 8 V_BAT I Power for RTC and SRAM 3 V DC 5 9 VC3 0 O Supply voltage of RF section E EE 10 V_ANT I Power supply for an active Up to 12 V DC antenna max 25 mA 11 RF GND Analog ground 12 RF GND Analog ground 13 RF_IN I GPS signal from connected 50 Ohms 1 575 antenna GHz 14 GND Digital ground 15 GND Digital ground 16 GND Digital ground 17 GND Digital ground 18 GND Digital ground 19 GND Digital ground 20 GND Digital ground 21 GND Digital ground 22 GND Digital ground 23 GND Digital ground 24 GND Digital ground 25 GND Digital ground 26 GND Digital ground This confidential document is the property of FALCOM GmbH and may
24. P7 T family JP7 TX operating with SiRFXTrac software do not support Trickle Power and Push To Fix operations The SiRFXTrac software known as firmware supports another operation mode as far as the low power consumption is recognized which is identified as APM mode Advanced Power Management for more information see chapter 5 4 5 1 Normal Operation In this default implementation of normal mode the JP7 T family is fully powered and performs the function of signal search acquisition measurement and satellite tracking The amount of time spent in the initial full power is dependent on the start condition that applies the number of satellites for which the ephemeris must be collected and the time to calibrate the RTC as well as the location of the GPS antenna which must have an unobstructed view to the sky in order to receive the satellite radio transmissions When the JP7 T family has been locked on to at least four satellites the receiver is able to calculate its current positions In this mode the JP7 T family is fully powered and satellite searching initial acquisition initial position calculation and tracking measurement functions are always performed In order to reduce the start up time of the receiver it is preferable to be connected to an external back up battery so that the RTC is running during the power interrupt The backup power is required for retention of SRAM memory and maintaining the Real Time Clock The validity of data s
25. SSC PELS 3 5 C sec a 200 0 1 5 C sec 2 Preheatin Va D en l S gt 8 100 sec E 4 di 100 rr 50 gt k 200 220 sec Time sec gt Figure 18 Typical solder conditions temperature profile reflow conditions Consider a long time in the soldering zone with temperature higher than 180 C has to be kept as short as possible to prevent component and substrate damages Peak temperature must not exceed 240 C JP7 T family are able to withstand twice the previous recommended reflow profile in order to be compatible with a double reflow when SMDs are mounted on both sides of the PCB A maximum of two soldering reflows is allowed for these packages The use of a no clean flux is highly recommended to avoid any cleaning operation In order to prevent any bump cracks ultrasonic cleaning methods are not recommended This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 49 GPS RECEIVER JP7 T VERSION 1 04 10 First steps to make it work ACTIVE ANTENNA BN a DIGITAL PART DIGITAL PART Rehaeree O VCC 3 3 VDC Figure 17 The minimum hardware interface of JP7 T to get started Antenna The antenna connection is the most critical part of PCB routing Previously placing the JP7 T on the PCB secure that the connection to the antenna signals is routed In order to make it prop
26. This document is available at HTTP WWW FALCOM DE JP7 T Family GPS Receiver Hardware description Version 1 04 GPS RECEIVER JP7 T VERSION 1 04 Contents 7 2 3 INTRODUCTION sccsisssssscssassccsccsssnssavssistentsennseccsansavsassenand GENER EE 5 SCOPE OF THE USER S MANUALE 6 USED ABBREVIATIONS ccccccesssssecssseeceesseeececsuceccessececssnsecsesuececeseecsesueeceesaeeecesuseceesinseseesaeeeesesaeees 7 RELATED DOCUMENTS ttrt tt tt ttrt tE EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEE EEEE 7 ONDIKO N COINA EEE N 8 SECURITY SCHSHSSSSSHSSHSSSHSSHSHSSHSSHSHSHSHSSSHSSHSHSHSHSHSSHSSHSHSHSHSSHSHSHSHSHSHSHSSHSSHSHSHHSHSSHHSHSOHSSHSSSOSES 9 GENERAL INFORMA TION EE 9 RESTRICTED USE geseet eege ous E A ss ee 9 CEL DREN EE 9 OPERATION ANTENINA E E EAEE EEE E EAE ANEL ASE E EEEE AA E A ENE E E 9 ELECTROSTATIC DISCHARGE ESD sviirissiteis icici craes EEN dee AN 10 SAFETY STANDARDS scissscsscsersessesieserrsrcrssdernsvieriesensmn Uh GPS BASICS PRINCIPLE EN kr SIGNAL PROCESSING OPERATION yisecseic ssss4 ede0sceavsa0dscdeesseassaesdoucdevssoaveqoededcdessseowooredecedsosseaseeesde 12 TECANK AL DA NN NN DESCRIPTION OF OPERATING MODES 15 NORMAL OPERATION 15 TRICKLE POWER OPERATION esne 15 PUSH TO FIX Mopp 16 ADVANCED POWER MANAGEMENT ADM 16 NMEA INPUT MESSAGE FOR TRICKLE POWER Mopp 21 TECHNICAL DESCRIPTION ccccsscccsssccssscceees 24 RECEIVER ARCHITECTURE ss sic
27. ation of a SPI Bus For realization of an Antenna indication These pins are not supported by the current GPS firmware Please note that the GPIOI pin on all GPS units operating with SiRFXTrac 2 firmware with NMEA 38400 Baud only is defined as an output pin and it controlls the validity of GPS receiving data A possible circuit to use this pin is shown in figure below If the LED flashes in rhythm the GPS receiver is searching satellites i e the GPS receiver receives invalid position data If the LED lights permanently i e the GPS receiver receives valid positions data Is the GPS receiver in APM Mode assumed that a position fix already has been obtained for more details refer to chapter 5 4 the LED lights permanently When the GPS receiver wakes up from the shut down to the full power mode the LED flashes in rhythm and then it lights permanently if valid GPS positions data is being received V Input 3 3 V DC 330 Q DES EE Fees 47 KQ GND This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 38 GPS RECEIVER JP7 T VERSION 1 04 7 Software interface The FALCOM JP7 T family supports NMEA 0183 and SiRF binary protocols A short description of these protocols is provided herein For more detailed information please refer to the SiRFstarII message set specification available in the section service downloads manuals at FALCOM home page
28. e 2 GND Digital ground 24 GND Digital ground 25 GND Digital ground 26 GND Digital ground ai GND Digital ground 28 GND Digital ground 29 GND Digital ground 30 GND Digital ground 31 GND Digital ground 32 GND Digital ground 33 GND Digital ground 34 GND Digital ground 35 GND Digital ground 36 GND Digital ground Ee Veca O Control output for RF part oe e i 38 Veca O Control output for RF part E E f This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 34 GPS RECEIVER JP7 T VERSION 1 04 PIN Name UO Description Level 39 GPIO3 UO See chapter 6 8 4 CMOS 40 SDI2 I Serial Data Input B CMOS 41 SDO2 O Serial Data Output B CMOS 42 SDO1 O Serial Data Output A CMOS 43 SDI I Serial Data Input A CMOS 44 BOOT_SELECT I Boots in update mode if high CMOS 45 vee I Main power supply TOON DERS 46 VCC I Main power supply 3 3 V DC 5 47 VCC I Main power supply tao VOC 5 48 VCC I Main power supply 3 3 V DC 5 49 VCC I Main power supply ONDES 50 VCC I Main power supply S 5 Antenna pads on the JP7 TC 2 only 1 RF GND Analog ground 2 RF_IN I GPS signal from connected 50 Ohms 1 575 antenna GHz 3 RF _ GND Analog ground Table 6 Pin assignment of the JP7 TC 1 2 6 8 1 Configuration and timing signals RESET _N This pin provides an active low reset input to the board It causes
29. e level shifters e g MAX 3232 from Maxim in order to obtain RS 232 compatible signal levels se also chapter 10 All supported variable baud rates and all can be controlled from the appropriate screens in SiRFdemo software You can directly communicate with a PC serial port SDI This is the main receiving channel and is used to receive software commands to the board from SiRFdemo software or from user written software SDI2 This is the auxiliary receiving channel and is used to input differential corrections to the board to enable DGPS navigation SDO1 This is the main transmitting channel and is used to output navigation and measurement data to SiRFdemo or user written software SDO2 For user s application This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 36 GPS RECEIVER JP7 T VERSION 1 04 6 8 3 DC input signals VCC This is the main DC power supply for 3 3 V powered board JP7 T family RF_IN Active antennas have an integrated low noise amplifier They can be directly connected to this pin RF_IN If an active antenna is connected to RE IN the integrated low noise amplifier of the antenna needs to be supplied with the correct voltage through pin V_ANT Caution Do not connect or disconnect the antenna when the JP7 T family is running Caution The RF IN is always fed from the input voltage on the V_ANT Do not use any input voltage on this pin
30. e 4 GPS RECEIVER JP7 T VERSION 1 04 0 Introduction 0 1 General This description is focussed on the GPS receiver of the FALCOM JP7 T family from FALCOM GmbH The JP7 T family is an excellent device designed and supports a wide variety of solutions regarding to the customer fulfilment the wide variety of the JP7 T family offers easy integration in various ways on the user independent application platform Regarding to the JP7 T family which contains JP7 T JP7 TB JP7 TC 1 2 concept there are three different GPS receivers with different options This manual contains information about purpose and use of the GPS receivers included into the FALCOM JP7 T family Please read this manual very carefully to avoid any mistakes and to secure an optimal use of the devices Each GPS receiver in the JP7 T family is a single board 12 parallel channel receiver intended as a component for OEM products The FALCOM JP7 T family is based and advanced on the FALCOM JP7 GPS receiver which delivers major advancement in GPS performance accuracy integration computing power and flexibility without modification regarding to the receiver form factor and pin out Each GPS receiver of the FALCOM JP7 T family has an integrated temperature compensated crystal oscillators TCXO Due to the higher stability of frequency it offers a highly improved performance Additionally a TCXO accept the condition for use the SiRFXTrac2 firmware The JP7 T family using SiRFXTrac
31. egration computing power and flexibility RECEIVER ARCHITECTURE Antenna input ea GRF2i LP RF Front End T MARK sp GSP2e LP T Bro Signal sm SDI2 Address Bus Data Bus 7 e a VCCRF Processor OET x x VANT XTAL RTC 9 x GPIO Main Input Power 3 3 V DC JP7 TC TC 1 2 JP7 T 6 x GPIO JP7 TC TC 1 2 9 x GPIO BOOTSELECT Figure 5 Receiver architecture of the JP7 T family GPS receiver Figure 5 above shows the block diagram of the JP7 T family architecture This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 24 GPS RECEIVER JP7 T VERSION 1 04 6 2 Description of GPS receiving signals When the GPS receiver is initially turned on it begins to determinate its current positions velocity and time In order to perform a successful start it must have a current almanac a reasonable expectation of its current location and a reasonable idea of the current time When the Ephemeris data are completely collected then satellite signals are tracked continuously and the position is calculated from time to time While the receiver is trying to obtain a position fix it needs to be locked on to at least four satellites In order to calculate quickly its current location the receiver uses the current received signals together with data from its memory SRAM The initial state of the receiver ref
32. ency conversion and the baseband demodulation are executed by hardware while the embedded ARM processor computes the GPS Position Velocity and Time solution employing the internal GPS software The purpose of the RF circuitry is to reinforce the very weak 130dBm nominal GPS signal filters it and down converts it to an Intermediate Frequency IF of 9 45MHz for digital processing The JP7 T family architecture relies on the high level of integration in the RF part to significantly reduce part count and circuit complexity The IF filter is built in as well e The digital baseband demodulator takes the quantified GPS signal and detects the individual satellites serial data bit stream along with the associated pseudo range This action consists of removing spread spectrum and Doppler frequency components of the signal to obtain the serial data messages The embedded ARM processor monitors channel allocation extracts the raw satellite tracking data computes the position and time solution and sends it on a serial port for high level applications to use or process it locally Support functions for the microprocessor include real time clock and reset pulse generator circuits e The internal GPS software monitors and allocates channels computes the Position Velocity and Time using the pseudo range of the satellites and reformat the data to be output at the serial interface or used locally The internal GPS software is a tasking based arch
33. erly functional a control impedance line has to connect the RF_IN signal with antenna feed points or antenna connector respectively The routing on the PCB depends on your choice Power The input power is also very important as far as the minimum and maximum voltage is concerned The power supply of JP7 T family has to be a single voltage source of VCC at 3 3 VDC The power supply has to be able to provide a sufficient current which typically rises to 200 mA Please connect GND pins to ground and connect the line which supplies the VCC pin to 3 3 V properly If they are correctly connected the board is full powered and the unit begins obtaining its position fix Serial Interface The JP7 T family provides two serial interfaces Each interface is provided with two wire the SDI1 SDO1 supports line and ground for the first serial interface port A and SDI2 SDO2 supports line and ground for the second serial interface port B These pins are 3 3 V CMOS compatible In order to use different voltage levels an appropriate level shifters has to be used E g in order to provide RS232 compatible levels use the 3 V compatible MAX3232 transceiver from Maxim or others based on the required levels The GPS data will be transmitted through port A first serial port if an active antenna is connected which has a good view to sky no obstacle You This confidential document is the property of FALCOM GmbH and may not be copied or circulated with
34. ers to the last status of the receiver in memory SRAM This essentially determines the length of time it will take for the receiver to obtain a GPS fix Position can be quickly fixed within 8 seconds from a hot start state and typically 45 seconds from a cold start state The receiver uses the satellite signals to calculate its exact current location by calculating the receiver distance from the satellites The position data within the receiver is then converted into latitude and longitude coordinates which are usually provided in the geodetic datum on which the GPS is based WGS84 6 3 Start Up Modes The start up modes of the JP7 T family depend on the last stored position in the SRAM memory such as the current time and ephemeris data So that the JP7 T family can be initiated to one of three different start up procedures but note that only one can be initiated at a time In order to perform a Warm and Hot start a backup battery has to be connected to the JP7 T family Without an external backup battery the receiver will perform a cold start after every turn on To achieve the faster start up offered by a hot or warm start a backup battery must be connected To maximize battery lifetime the battery voltage should not exceed the maximal supply voltage and should be between 2 85 V and 3 15 V 6 3 1 Cold start The unit stores data about where the satellites are located at any given time The data is called almanac Occasionally whe
35. es must be WGS84 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 42 GPS RECEIVER JP7 T VERSION 1 04 Note NMEA input messages 100 to 105 are SiRF proprietary NMEA messages The MSK NMEA string is defined by the NMEA 0183 standard 7 2 3 Transport Message Start Sequence Payload Checksum End Sequence PSRF lt MID gt Data CKSUM lt CR gt lt LF gt 1 Message Identifier consisting of three numeric characters Input messages begin at MID 100 2 Message specific data Refer to a specific message section for lt data gt lt data gt definition 3 CHECKSUM is a two hex character checksum as defined in the NMEA specification Use of checksums is required on all input messages 4 Each message is terminated using Carriage Return CR Line Feed LF which is r n which is hex OD OA Because r n are not printable ASCII characters they are omitted from the example strings but must be sent to terminate the message and cause the receiver to process that input message CheckSum The checksum is 15 bit checksum of the bytes in the payload data The following pseudo code defines the algorithm used Let message to be the array of bytes to be sent by the transport Let msgLen be the number of bytes in the message array to be transmitted Clearly to say the string over which the checksum has to be calculated is between the and
36. he interface connector on the JP7 TC 1 2 Please note that the JP7 TC 2 is without RF connector and there is no antenna cable included in the delivery package The pin assignment of 50 pin connector described in the table below is the same as JP7 TC 1 PIN Name UO Description Level 1 RFPC1 O Control output for Trickle 2 85 V DC Power Mode max 25 mA Control output for Trickle 2 85 V DC S St Power Mode max 25 mA 3 GPIO15 LO See chapter 6 8 4 CMOS 4 GPIO14 UO See chapter 6 8 4 CMOS 5 GPIO13 LO See chapter 6 8 4 CMOS 6 T MARK O 1 PPS Time Mark Output CMOS not supported by SiRFXTrac software 7 GPIO1 UO See chapter 6 8 4 CMOS 8 GPIOO UO See chapter 6 8 4 CMOS 9 GPIO7 LO See chapter 6 8 4 CMOS 10 GPIO5 UO See chapter 6 8 4 CMOS 11 GPIO6 LO See chapter 6 8 4 CMOS 12 GPIO10 LO See chapter 6 8 4 CMOS 13 RESET N I Reset the unit if Active Low CMOS This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 33 GPS RECEIVER JP7 T VERSION 1 04 PIN Name UO Description Level 14 V_BAT I Power for RTC and SRAM 3 V DC 45 15 V_BAT I Power for RTC and SRAM 3 V DC 45 16 GND Digital ground 17 GND Digital ground 18 GND Digital ground 19 GND Digital ground 20 VC3 0 O Supply voltage of RF section E E 21 GND Digital ground 22 V_ANT I Power supply AN an active Up GE Ge e
37. he settings for the trickle power mode can be modified by using the SiRFstar demo software For example if the FALCOM JP7 T is configured to enter the OnTime mode each 10 s for a duration of 200 ms the This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 13 GPS RECEIVER JP7 T VERSION 1 04 average power consumption can be reduced up to approx 95 approx 15 mW ca 4 8 mA at Vcec 3 3 V For more details see chapter 5 Operating modes ON OFF Time Time gt Continuous Tricklepower Mode d Mode 800 ms 1s Figure 2 Example for the trickle power mode of FALCOM JP7 T family This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 14 GPS RECEIVER JP7 T VERSION 1 04 5 Description of operating modes There are three basic operating modes in which the JP7 T family operates during use Each mode is used to accomplish a different task during the process of acquiring and maintaining the GPS information The FALCOM JP7 T family designs include all the functionality necessary to implement the three different modes of operation The default mode of JP7 T family is normal mode continuous mode Three different operating modes are described below Additionally two of them are designed as low power mode consumption such as the Trickle Power mode and Push To Fix mode The J
38. ill monitor the on time and then set subsequent off times to maintain the designated duty cycle In changing signal environments variable time between fixes can be expected If time between fixes is of priority the receiver will maintain the expected time between fixes without maintaining duty cycle In low signal environments this may result in the receiver staying in full power to maintain time between fixes By means of released SiRFdemo software version 3 61 from SiRF the user is able to configure this operation mode with desired setting Figure below demonstrates the difference in operation between duty cycle and time between fixes priority operation in changing signal strength environments All three graphs are explained as follows High 1 GPS signal Power Level C No Low Indicates Fix Sent Y 4 Power Level Full Duty Priority Low WY vy vy Power Level Full TBF Priority Low Time GPS signals Level Drops e g User walks indoors 2 Lower signal results in longer Ontime In maintain duty cycle Offtime is increased Lower signals means missed TBF To maintain future TB Fs board goes into full power until signal level impove e TBF means Time Between Fixes The top graph of Figure above shows the GPS signal level as a function of time At point 1 the signal level drops significantly which results in the GPS receiver requiring more time to acquire the signal and generate a fix after starti
39. in chapter 6 8 4 The SiRFXTrac2 firmware is available in two versions see updated chapter 11 4 1 1 04 Fadil Beqiri The mechanical dimensions of the balls position on the JP7 TB C receiver updated see Figure 10 and Figure 12 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 3 GPS RECEIVER JP7 T VERSION 1 04 Cautions Information furnished herein by FALCOM is believed to be accurate and reliable However no responsibility is assumed for its use Also the information contained herein is subject to change without notice Please read carefully the safety precautions If you have any technical questions regarding this document or the product described in it please contact your vendor General information about FALCOM and its range of products is available at the following internet address http www falcom de Trademarks Some mentioned products are registered trademarks of their respective companies Copyright The JP7 T family hardware description is copyrighted by FALCOM GmbH with all rights reserved No part of this user s guide may be produced in any form without the prior written permission of FALCOM GmbH FALCOM GmbH No patent liability is assumed with respect to the use of the information contained herein This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Pag
40. in the delivery package In order to have one the users of JP7 T family have to purchase it This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 51 GPS RECEIVER JP7 T VERSION 1 04 gt Ete Demo 3 58 on COM1 38400 i oj sl Setup View Action Navigation Poll Window EmA fw e 12 Channel Signal Level view WK 1222 POS 3975876 771840 4910681 CLK 91472 CHNL 12 Figure 19 Example of using of the SiRFdemo The SiRFdemo manual and software are available on the FALCOM Website for free download gt www falcom de service downloads manual SiRF SiRFdemo pdf gt www falcom de service downloads manual SiRF SiRFdemo zip This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 52 GPS RECEIVER JP7 T VERSION 1 04 11 Appendix 11 1 Board to board connector This chapter provides specifications for the 50 pin board to board connector that serves as physical interface to the host application The receptacle assembled on the JP7 TC is type Hirose DF12C Mating headers from Hirose are available in different stacking heights ame Figure 20 a Hirose DF12C receptacle on JP7 TC Figure 20 b Header Hirose DF12C 11 2 RF connector The JP7 TC uses an ultra miniature SMT antenna connector supplied from Hirose Ltd The product name is e U FL R SMT The pos
41. itecture driven by the 100ms interrupt generated by GSP2e internal hardware This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 12 GPS RECEIVER JP7 T 4 Technical data FEATURES VERSION 1 04 OEM single board 12 channel GPS receiver size weight casing TCXO 8Mbit FLASH memory operating voltage power consumption temperature range protocol trickle power mode JP7 T 25 4 x 25 4 x 3 mm L x B x H JP7 TB 25 4 x 25 4 x 3 3 mm L x B x H JP7 TC 1 25 4 x 25 4 x 5 2 mm L x B x H JP7 TC 2 25 4 x 25 4 x 5 2 mm L x B x H JP7 T 2 5 g without shielding JP7 TB_ 2 5 g without shielding JP7 TC 1 2 5 g without shielding JP7 TC 2 2 5 g without shielding Fully shielded 3 3 V DC 5 220 mW continuous mode with Low Power chipset 40 to 85 C operation transportation and storage SDI1 SDO1 NMEA 9600 baud Msg GLL GGA RMC VTG GSV GSA 8 data bits no parity 1 stop bit SDI2 SDO2 RTCM 9600 baud The default Mode of FALCOM JP7 T is continuous Mode but the user can set FALCOM JP7 T into the Trickle Power Mode via input command message The FALCOM JP7 T family enters the trickle power mode corresponding to figure 2 800 ms OFF Time and 200 ms ON Time as soon as valid GPS data are available As a result the average power consumption is reduced by approximately 80 approximately 150 mW T
42. itially turned on it begins to determinate its current positions velocity and time which will be calculated from tracking the GPS signals at an extremely small level by 16 dBHz While trying to calculate a position fix the receiver needs to be locked on to at least four satellites Your position can be extremely quick fixed within 4 seconds instead of within 8 seconds using other GPS software from a hot start state and within 45 seconds from a cold start state As a general note the SiRFdemo v3 61 supports the additional functionality and configuration of SiRFXTrac2 This software is now available on FALCOM s Website for free download gt www falcom de service downloads manual SiRF SiRFdemo3 61 zip 11 4 1 SiRFXTrac2 firmwares default settings There are two SiRFXTrac2 firmware which can be delivered to the end user upon user request 1 SiRFXTrac 2 firmware version with NMEA 38400 baud All GPS units which use this SiRFXTrac2 firmware version have the following settings on serial interfaces SDI1 SDO1 first serial port This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 54 GPS RECEIVER JP7 T VERSION 1 04 NMEA 38400 baud Msg GLL GGA RMC GSV GSA and VTG 8 data bits no parity 1 stop bit SDI2 SDO2 second serial port RTCM 38400 baud 2 SiRFXTrac2 firmware version with NMEA 4800 baud All GPS units which use this SiRFXTrac2 firmware version have the
43. ition of the antenna connector on the JP7 TC board has to be seen on bottom side on the upper right corner Mating plugs and cables can be chosen from the Hirose U FL Series Examples are shown in figure below For latest product information please contact your Hirose dealer or visit the Hirose home page for example http www hirose com Figure 21 Mechanical dimensions of U FL R SMT connector with U FL LP 040 plug This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 53 GPS RECEIVER JP7 T VERSION 1 04 11 3 Firmware Interface The table below shows supported SiRF firmware versions in the JP7 T family devices GPS Supported SiRF internal firmware version Receiver 2 20 2 32 SiRFXTrac2 SiRFDrive JP7 T X X S JP7 TB x x 2 x JP7 TC 1 x x g x JP7 TC 2 x x e x JP7 TX x JP7 TBX x x JP7 TCX 1 X X JP7 TCX 2 X X The firmware is also supported from the unit but the unit will not be delivered with that firmware 11 4 XTrac firmware description The JP7 T family using SiRFXTrac2 software offers high position accuracy and fast Time To First Fix TTFF than is currently possible with other autonomous GPS solution This means that the JP7 T family will continue to determinate its positions or obtain an initial fix in places where previously not possible When the GPS receiver loaded with SiRFXTrac2 is in
44. n the JP7 T family has been turned off for a long time the almanac can get out dated or cold The cold start takes place when the receiver does not know its last position or time In this start up mode the receiver either does not operate under back up power conditions or it is the first start up time i e no idea about ephemeris or almanac data At this time the Ephemeris data has yet to be completely collected Once the ephemeris data is collected from in view satellites then the data from these satellites is considered valid and available for navigation This start up scenario is one of the longest time which the receiver will take to obtain a GPS fix This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 25 GPS RECEIVER JP7 T VERSION 1 04 6 3 2 Warm start This start up procedure so called Warm start is performed when the time and position are known to within some limits as well the almanac data are known and at least 3 Satellites Ephemeris are valid from previous operation The validity of this data is dedicated if the receiver is switched off for more than 2 hours If the receiver has been moved for more than 100 miles or the accurate time is currently not available then the Ephemeris data can be invalid In such case the receiver will have to acquire the satellites and to collect the Ephemeris data which are in this scenario required 6 3 3 Hot start This s
45. ng the next APM cycle A receiver using Duty priority middle graph recognizes that the On Time of the current cycle is suddenly longer point 2 such that to maintain the duty cycle the subsequent Off Time must also be longer It can be seen that the TBF value in the Duty cycle case is variable although generally it will be constant for a given signal level This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 17 GPS RECEIVER JP7 T VERSION 1 04 In the TBF priority case bottom graph GPS recognizes point 3 that it has missed sending out a fix when normally expected after a TBF interval has elapsed The GPS enters the full power mode because it knows that it cannot acquire a fix in the requested TBF time given the current signal conditions Once the signal conditions improve the GPS is allowed to enter the low power mode again The Duty priority is designed to maximize battery life and is primarily functional during signal conditions in which it may be difficult to provide navigation information i e low Cno on several of the satellites The board will monitor the On Time of its current cycle and set its subsequent Off Time to maintain the indicated Duty Cycle The effect of this is that the time between subsequent fixes TBF when Duty is selected is a variable number generally stable when the signal conditions are not changing The board will make no attempt to main
46. on Send button to place the receiver into APM mode The SiRF input message above corresponds to the polled receiver configuration on figure below The configuration can be polled by selecting Set Low Power from the Action menu of main window when the status of receiver is polled its configuration is updated as shown in the figure below Note that the GPS receiver can also be set into the APM mode using the following window This window allows users easy and comfortable configuration of APM Just select the mode to APM Enable option from the Mode group box The APM mode of GPS can be configured according to your requirements Click on Send button to place the receiver into APM mode with set operating parameters The below schematic shows the structure and description of the APM Mode input message 35 01 00 1E 00 06 06 00 00 0A 01 00 Reserved for expansion APM settings Timing Priority Preference APM settings Power Duty Cycle Accuracy and Timing Accuracy Priority Preference Accuracy and Timing Max Response Time Accuracy and Timing Max Requested Vert Error Accuracy and Timing Max Requested Horiz Error Reserved for expansion APM settings Time Between Fixes Num APM cycles before sleep 0 gt 255 Mode AMP Enable Message ID Figure 3 Structure of APM input message This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 20 GPS RECEIVER JP7 T VERSION 1 04
47. out permission Page 50 GPS RECEIVER JP7 T VERSION 1 04 can use port B second serial port to feed in DGPS correction data Pull up 100 kQ unused SDI inputs Active Antenna Bias Voltage The output voltage at the antenna cable can be used to power the bias voltage of the antenna provided can make sure that the antenna runs down to 2 7 V bias voltage and the current does not exceed 20 mA Backup Battery In order to allow the GPS receiver to perform internally the warm and hot start it is advisable to connect the V_BAT pin to an external backup battery For more information on cold warm and hot start scenarios please refer to the Section 6 3 Start Up In case of a power interruption on pin VCC the real time clock and backed up SRAM are continually supplied through V_BAT The voltage at this pin has to be 3 V DC 5 If you do not use a backup battery connect this pin to GND or leave it open Do not use a super cap for the battery backup supply recommended by SiRF The quickest way to get first results with the JP7 T is to use the JP7 T Evaluation board together with the program SiRFdemo Figure 18 JP7 T Evaluation board The Evaluation board contains Evaluation Box JP7 T sample with soldered antenna cable power supply AC DC adapter Type FW738 05 Output SVDC 1 3 A active GPS antenna FAL ANT 3 RS232 level shifter RS232 cable to your computer The Evaluation board with contained components is not included
48. put messages Table 9 lists all NMEA output messages supported by SiRFstarlle evaluation receiver and a brief description Option Description GGA Time position and fix type data GLL Latitude longitude UTC time of position fix and status GSA GPS receiver operating mode satellites used in the position solution and DOP values GSV The number of GPS satellites in view satellite ID numbers elevation azimuth and SNR values MSS _ This message can be switched on via SiRFdemo software Signal to noise ratio signal strength frequency and bit rate from a radio beacon receiver RMC Time date position course and speed data VTG Course and speed information relative to the ground Table 9 NMEA Output Messages 7 2 2 NMEA input messages Message MID Description Set Serial Port 100 Set PORT A parameters and protocol Navigation Initialization 101 Parameters required for start using X Y Z Set DGPS Port 102 Set PORT B parameters for DGPS input Query Rate Control 103 Query standard NMEA message and or set output rate LLA Navigation Initialization 104 Parameters required for start using Lat Lon Alt Development Data On Off 105 Development Data messages On Off MSK Receiver Interface MSK Command message to a MSK radio beacon receiver Table 10 NMEA Input Messages 1 Message Identification MID 2 Input co ordinates must be WGS84 3 Input co ordinat
49. rotocol messages DGPS protocol 6 5 1 11 Time IPPS Pulse Level Pulse duration Time reference Measurements 6 5 1 12 TCXO Specification VERSION 1 04 18 000 meters 60 000 feet max lt 515 meters second 1000 knots max 4 g max 20 meters second max 3 3 VDC 5 65 mA at 3 3 V DC 3 V DC 45 Two full duplex serial communication CMOS SiRF binary and NMEA 0183 version 2 32 with a baud rate selection SiRF binary position velocity altitude status and control NMEA GGA GLL GSA GSV RMC and VTG RTCM SC 104 version 2 32 type 1 5 and 9 CMOS 100 ms At the pulse positive edge Aligned to GPS second microsecond Typical phase noise density 1 Hz offset 57 0 dBc Hz Typical phase noise density 10 Hz offset 88 0 dBc Hz Typical phase noise density 100 Hz offset 112 0 dBe Hz Typical phase noise density 1 kHz offset 130 0 dBe Hz Typical phase noise density 10 kHz offset 140 0 dBe Hz Load sensitivity Long term stability 10 load change 0 2 ppm Frequency drift over 1 year 0 5 to 2 0 ppm This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 28 GPS RECEIVER JP7 T VERSION 1 04 6 6 Hardware interface Pin NR Pin NR 16 30 1 15 16 17 18 19 20 15 14 13 12 11 21 10 22 9 23 8 24 7 25 6 5 DIGITAL PART y 28 3 29 2 30 1 Pin Name
50. sseisecccsyecevee0086iscs ces aieea EREE edn dE ENEE ENEE DESEN 24 DESCRIPTION OF GPS RECEIVING SIONALS 25 START UP MODES ieseevssidsiesseecceasesedceoseesccaesssveedenscascsssSucsacesdesvedesGnicecu soavevesiaaeeessbeoveoreeeacessessseeatees 25 CON SHAN AEON PESE AE ee ege EE 25 Warmi start eege geed E A EE E T A E E eas Ae eae aes eS 26 Hot start soseen EE ee eT 26 PRODUCTAPPLICA IONS EE 26 TECHNICAL SPECIFICATIONS anren T a EAS E a EA EE 27 Electrical Characteristi S seseina dee E ET A A EAO EERE 27 HARDWARE INTERFACE veces eni ra a EAS E E E a EAA ETE 29 BALLS ASSIGNMENT OF THE JP 7 T EE 30 PIN ASSIGNMENT OF THE 50 PIN CONNPCTOR 33 Configuration and timing aignals ceceseecsssecseeeeceeeeeceseeeceaecaeeseeseeseceaeeeeaecateaecaeverenaeeneeaeeates 35 Serial communication signals o ces ics ceocecossaeetessavesevsstsesanechesseuseensstadeuees Sloessescnssesseseisdensclvaleteveubes 36 DC Late LE EE 37 General purpose mmputoutput ec ecceccesecesecscecseeeseeseecseecseeeseeeeeeeecsseeeseesaeeeseeaeeaesaecneeeaeeeseeees 38 SOFTWARE INTERFACE SOCHSHSHSHSHSHSHSSHHSSHSSHSSHHSHSSHSSHHSHSHSHHSHSSHHHSHSSOEESES 39 SIRF BINARY DATA M SSAOE 39 NMEA DATA MESSAGE 41 NMEA output E 42 eh Ee ET 42 Transport Messages sxasvscbec 5cisacshe sashes se eege eege 43 MECHANICAL DRAW sssssssssessessssssseessssseosssssooossssseseee 44 This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 2
51. structions 1 3 Children Do not allow children to play with the GPS receiver It is not a toy and children could hurt themselves or others The GPS receiver consists of many small parts which can come loose and could be swallowed by small children Thoughtless handling can damage the GPS receiver 1 4 Operation antenna Operate the GPS receiver with an antenna connected to it and with no obstruction between the receiver and the satellite Make absolutely sure that the antenna socket or antenna cable is not shorted as this would render the GPS receiver disfunctional Do not use the receiver with a damaged antenna Replace a damaged antenna without delay Use only a manufacturer approved antenna Use only the supplied or an approved antenna with your GPS receiver Antennas from other manufacturers which are not authorized by the supplier can damage the GPS receiver Technical modifications and additions may contravene local radio frequency emission regulations or invalidate the type approval Authorized GPS antennas FAL ANT 3 active antenna This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 9 GPS RECEIVER JP7 T VERSION 1 04 1 5 Electrostatic Discharge ESD The JP7 T family GPS receiver contains class 1 devices The following Electrostatic Discharge ESD precautions are recommended Protective outer garments Handle device in ESD safeguarded work area
52. ta 0x 1E 30 Nav Lib SV State Data Satellite State Data Ox IF 31 Nav Lib Initialization Data Initialization Data 0x FF 259 Development Data Various status messages Table 7 SiRF Output Messages Table 8 lists the message list for the SiRF input messages Hex ASCII Name Description 0x55 85 Transmit Serial Message User definable message 0 x 80 128 Initialize Data Source Receiver initialization and associated parameters 0x8l 129 Switch to NMEA Protocol Enable NMEA message output rate and baud rate 0 x 82 130 Set Almanac upload Sends an existing almanac file to the receiver 0 x 84 132 Software Version Poll Polls for the loaded software version 0x85 133 DGPS Source Control DGPS correction source and beacon receiver information 0x86 134 Set Main Serial Port Baud rate data bits stop bits and parity 0x87 135 Switch Protocol Obsolete 0 x 88 136 Mode Control Navigation mode configuration 0 x 89 137 DOP Mask Control DOP mask selection and parameters Ox8A 138 DGPS Mode DGPS mode selection and timeout value 0x 8B 139 Elevation Mask Elevation tracking and navigation masks 0x 8C 140 Power Mask Power tracking and navigation masks 0x 8D 141 Editing Residual Not implemented 0x 8E 142 Steady State Detection not Not implemented used This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 40 GPS RECEIVER JP7 T VERSION 1 04
53. tain the TBF in this case The only exception is if the Off Time based on the On Time and Duty Cycle would result in a smaller TBF than requested by the user If the user has selected the TBF priority the behavior will be quite different In general the board will try to maintain the TBF In certain situations this could mean that the board will go to full power between subsequent fixes Figure attached on this section demonstrates the concept behind duty cycle and TBF priority The diagram is fairly simplistic and is meant only to show general behavior during a GPS signal power transition During APM shutdown periods the GPS receiver will not be able to receive transmit messages To send any messages to the GPS receiver and the GPS receiver to be able to process input messages the user must wait until the next cycle of APM or a external reset has to be performed However the SiRF Binary Message OkToSend will be used to indicate the start and end of each APM cycle The following formula calculates the Off Time a function of On Time and Duty Cycle 1 Duty Cycle Off Time On Time Duty Cycle To implement the APM certain parameters must be initialized in the APM module These parameters are provided via the SiRF Binary APM message The APM module will not engage until it has received all of the information In some applications it is possible to set up the default parameter values to provide APM operation wi
54. tart up procedure so called Hot start is performed when the time and position are accurately known as well the almanac data are also valid The validity of this data is dedicated if the receiver has been switched off for less than 2 hours and the real time clock RTC has been operating during that switch off time This start up procedure performs computing of valid positions only The problems which may be met while start up modes The validity of the Real time Clock RTC during start up is determined in part through a checksum of the SRAM to see if it has been corrupted If the SRAM checksum shows the memory has been corrupted the RTC is also assumed to be invalid and the system ignores the RTC value In this case the system will not perform a hot start but will fall back to a cold start mode with a longer time to first fix TTFF on the order of less than 45 seconds typical These problems may happen in case of the RTC randomly drop counts under minimal supply voltage conditions which is supplied from external connected backup battery and supports the RTC operation 3 0 VDC 5 6 4 Product applications Handheld GPS receiver applications Automotive applications Marine navigation applications Aviation applications Timing applications This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 26 GPS RECEIVER JP7 T 6 5 Technical specifications 6 5 1
55. ted without permission Page 19 GPS RECEIVER JP7 T VERSION 1 04 The GPS receiver accepts the SiRF input message specified in Hex format lt Message ID gt lt space gt lt APM_ENABLED gt lt space gt lt Num Fixes gt lt space gt lt TIME_BTW_FIXES gt lt space gt lt Spare Byte 1 gt lt space gt lt HORL ERR MAN space lt VERT_ ERR MAN lt space gt lt RESP_TIME MAX gt lt space gt lt TIME_ACC_PRIORITY gt lt space gt lt POWER_DUTY_CYCLE gt lt space gt lt TIME_DUTY_CYCLE lt space gt lt Spare Byte2 gt The input message is accepted if the GPS receiver operates in the SiRF binary mode else the input message will be ignored The APM mode cannot be implemented if the receiver operates in the NMEA mode In order to set the receiver into the APM mode via SiRF input message start the SiRFdemo software version 3 61 select the COM port where GPS receiver is connected and the baud rate to 38400 bps then open the COM port If the receiver is operating in NMEA mode switch it to the SiRF binary mode select Switch to SiRF protocol from the Action menu of main window After the receiver has obtained a GPS fix it is able to be set in the APM mode To do this open Action menu from main window and start Transmit Serial Message On the appeared dialog box type the following characters 35 01 00 1E 00 06 06 00 00 0A 01 00 do not forget to set the space character between 2 bytes If the SiRF input message is correctly typed click
56. the Trickle Mode configuration are kept from previous operation If the receiver fails to acquire satellites within a given period of time approx 150 sec the receiver sets itself into the sleep phase The duration of this sleep phase is approx 30 sec After that the receiver wakes up resets itself and tries to acquire satellites which are in view This procedure repeats itself until the initial position computation of GPS receiver is completed Hint After initial turn on or system reset the JP7 T will remain in the full power tracking until a series of Kalman filter navigation solution is obtained all ephemeris data is collected and the RTC is calibrated prior to transitioning to the low power duty cycle mode 5 3 Push to Fix Mode The Push to Fix mode puts the FALCOM JP7 T family into a background duty cycle which provides a periodic refresh of position receiver time ephemeris data and RTC calibration every 30 minutes The Push to Fix mode is similar but executive from Trickle Power mode meaning that only one mode can be set at a time In this mode the receiver sets itself into the sleep phase for 29 5 minutes and a full tracking phase for 30 seconds During the tracking phase the JP7 T family acquires satellites computes position and updates ephemeris data as well the RTC is being calibrated The transition into the Push to Fix mode of JP7 T family can be implemented and configured by using the Set Operating Mode command in SiRFdemo
57. the board to reset and to start searching for satellites If not utilized this input pin may be left open T MARK This pin provides 1 pulse per second output from BOOT SELECT RFPCO the board which is synchronized to within 1 microsecond of GPS time The output is a CMOS level signal Set this Pin to high 43 3 V DC for reprogramming the flash of the JP7 T for instance updating a new firmware for the JP7 T RFPCO pin is provided to the JP7 TB and JP7 TC module This pin is a control output for the Trickle This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 35 GPS RECEIVER JP7 T VERSION 1 04 Power Mode A possible circuit is shown in figure below If the LED lights permanently the GPS receiver is searching satellites Is the GPS receiver in Trickle Power Mode the LED flashes in rhythm i e the GPS receiver receives valid positions data see also figure 8 Note By switched off Trickle power the LED will flash permanently The reception of satellites data can be checked by using the T Mark however can not be evaluated EAN o Vcc 3 3 V DC 330 Q 5 47 KQ A RFPCO o BC817 GND figure 8 The control output for Trickle Power Mode 6 8 2 Serial communication signals The board supports two full duplex serial channels All serial connections are at CMOS levels If you need different voltage levels use appropriat
58. thout the entry of the APM message Table below describes the SiRF Binary APM parameters APM parameters SiRF Se Bytes Scale Example Units Description as Figure 4 Message ID 1 0x35 53 decimal 1 APM _ 1 TRUE APM Enable Disable flag Bits 2 ENABLED Bit 0 FALSE 1 7 reserved for expansion Num Fixes 1 Number of requested APM 3 cycles May have one or more fix per cycle This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 18 GPS RECEIVER JP7 T VERSION 1 04 Range 0 gt 255 TIME BTW_ 1 1 Seconds Time between requested fixes 4 FIXES Range 10 gt 180 Spare Byte 1 1 Reserved for expansion 5 HORI ERR 1 See Table Maximum requested horizontal 6 MAX error GPS shall try to provide a position with horizontal error less than this specified value in 95 of the cases VERT_ERR_ 1 See Table Maximum requested vertical 7 MAX error GPS shall try to provide a position with vertical error less than this specified value in 95 of the cases Not used reserved for expansion RESP_TIME_ 1 1 Seconds Maximum response time GPS 8 MAX shall try to provide a position within the specified time Not used reserved for expansion TIME ACC 1 0x00 No priority imposed 9 PRIORITY Bits 0x01 RESP_TIME_ MAX has 0 1 higher priority 0x02 HORI ERR MAX has higher priority Bits 2 7 reserved for expansion
59. tored in SRAM is kept due to RTC keeps running and these data will be needed on the next power up scenario 5 2 Trickle Power Operation In the Trickle Power mode power is still applied to the JP7 T family but the GPS engine is shut off and RF circuits are powered down The Trickle Power mode provides a method of operating the JP7 T family in a user programmable duty cycle consisting of a receiver measurement on time tracking and an interval of position update thereby reducing the average power consumption over a period of time The transition into the Trickle Power mode of JP7 T family can be implemented and configured by using the Set Operating Mode command in SiRFdemo Between two on time tracking periods the JP7 T family sets itself in the sleep phase in other words into the low power consumption The transition from sleep mode of JP7 T family back to the on time tracking is generated through the internal RTC which transmits a wake up signal to the GPS engine to switch it on as This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 15 GPS RECEIVER JP7 T VERSION 1 04 well the RF circuit is powered on The JP7 T is waked up and begins to acquire the on view satellites In order to reduce the start up time of the receiver for the next power up is preferable to connect an external back up battery so that the RTC is running during the power interrupt and the required data and
60. update intervals less than approximately 600 seconds i e rates faster than one fix per 10 minutes the Trickle Power mode at an update interval of 10 seconds offers a lower power solution The user would then be required to filter the output position data to use only the data points corresponding to the desired update interval For example if the desired position output is at 60 second intervals then the user would only need one out of every six position outputs at a 10 second Trickle Power update interval Alternatively the user could perform smoothing or averaging of the position data and provide an output at the desired rate T E d E 3 oO 10 100 1000 10000 Update Period sec This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission Page 23 GPS RECEIVER JP7 T VERSION 1 04 6 Technical Description 6 1 Receiver Architecture The JP7 T family OEM GPS receiver from FALCOM is a new OEM GPS receiver product that features the SiRFstarlIl Low Power chipset This completes 12 channels WAAS enabled GPS receiver provides a vastly superior position accuracy performance in a much smaller package The SiRFstarII architecture builds on the high performance SiRFstarI core adding an acquisition accelerator differential GPS processor multipath mitigation hardware and satellite tracking engine The JP7 T family delivers major advancements in GPS performance accuracy int

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