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1. V Data invalid Mode Indicator A A Autonomous D DGPS E DR checksum 7E lt CR gt lt LF gt End of sentence SR 92 User s Manual V1 0 pac A ma SR 92 Manual V1 0 3 4 GPGSA GNSS DOP and Active Satellites H Example GPGSA A 3 05 02 26 27 09 04 15 1 8 1 0 1 5 11 H Explanation Contents Example Explanation Message ID GPGSA GSA protocol header Mode 1 A M Manual forced to operate in 2D or 3D mode A 2D Automatic allowed to automatically switch 2D 3D Mode 2 3 1 Fix not available 2 2D lt 4 Satellites used 3 3D gt 3 Satellite s used Satellite used in solution 05 Satellite on Channel 1 Satellite used in solution 02 Satellite on Channel 2 Ss Display of quantity used 12 max PDOP 1 8 Position Dilution of Precision HDOP 1 0 Horizontal Dilution of Precision VDOP 1 5 Vertical Dilution of Precision checksum 11 lt CR gt lt LF gt End of sentence 3 5 GPGSV GNSS Satellites in View m Example GPGSV 2 1 07 07 79 048 42 02 51 062 43 26 36 256 42 27 27 138 42 71 GPGSV 2 2 07 09 23 313 42 04 19 159 41 15 12 041 42 41 H Explanation Contents Example Unit Explanation Message ID GPGSV GSV protocol header Number of messages 2 Range 1 to 3 Message number 1 Range 1 to 3 Satellites in view 07 Number of satellites visible from receiver Satellite ID numb2. and SNR values GPRMC Recommended minimum specific GNSS data time date position course speed GPVTG Course over ground and ground speed GPZDA PPS timing message synchronized to PPS The SR 92 adopts interface protocol of National Marine Electronics Association s NMEA 0183 Version 3 00 interface specification SR 92 supports 7 types of NMEA sentences GPGGA GPGLL GPGSA GPGSV GPRMC GPVTG and GPZDA The default output sentences are GPGGA GPGSA GPGSV and GPRMC The UART communication parameters are 4800 bps 8 data bits 1 stop bit and no parity Other output sentences baud rate and related configurations could be requested based on MOQ Single message example GPGGA 101229 487 3723 2475 N 12158 3416 W 1 07 1 0 9 0 M 0000 3E GPGLL 2446 8619 N 12100 2579 E 060725 000 A A 7E GPGSA A 3 05 02 26 27 09 04 15 1 8 1 0 1 5 11 GPGSV 3 1 12 07 62 081 37 16 61 333 37 01 60 166 37 25 56 053 36 74 GPGSV 3 2 12 03 43 123 33 23 32 316 34 14 17 152 30 20 16 263 33 78 GPGSV 3 3 12 19 17 210 29 06 08 040 15 06 117 27 21 05 092 27 7E GPRMC 151229 487 A 3723 2475 N 12148 3416 W 0 13 309 62 120598 A 5F GPVTG T M 0 00 N 0 0 K A 13 GPZDA 060526 000 20 06 2006 51 SR 92 User s Manual V1 0 pac A ma 3 2 GPGGA Global Positioning System Fix Data SR 92 Manual V1 0 m Example GPGGA 101229 487 3723 2475 N 12158 3416 W 1 07 1 0 9 0 M 0000 3E H Explanation Contents Example Unit Explana
3. Explanation Contents Example Unit Explanation Message ID GPZDA ZDA protocol header UTC time 181813 Either using valid IONO UTC or estimated from default leap seconds Day 14 Day according to UTC time 01 to 31 Month 10 Month according to UTC time 01 to 12 Year 2006 Year according to UTC time 1980 to 2079 Local zone hour 00 hour Offset from UTC set to 00 Local zone minutes 00 minute Offset from UTC set to 00 checksum 4F lt CR gt lt LF gt End of sentence SR 92 User s Manual V1 0 12 pacA ma 4 Electrical and Environmental Data SR 92 Manual V1 0 Electrical Data Power Supply 3 3 5 5VDC Power Consumption w o antenna 40mA average tracking Backup Battery Supply Nominal voltage 3 0 V Digital UO Vin 2 3 15V Vi 0 0 85V Vou gt 2 1 V Nos 0 72V Protocols NMEA default SIRF Binary Environmental Data Operating temperature 40 85 C Storage temperature 40 125C Vibration 5Hz to 500Hz 5g Shock Half sine 30g 11ms 13 SR 92 User s Manual V1 0 pacA ma SR 92 Manual V1 0 5 Application To have best performance it is suggested to place SR 92 at the location of best RF signal reception say the upper side of product housing The motherboard is usually perpendicular to the upper side housing In this case just connect the 5 pin to the motherboard via connection wires Please not
4. H bf SR 92 Manual V1 0 GPS Engine Board Manual SA G2 SIRF STAR II V 1 0 Easy to Use Ultra High Performance GPS Smart Antenna Module With Power Control DAG Made in Taiwan 2008 08 08 service dagamagps com www dagamagps com FREE SERVICE HOT LINE FOR MAINLAND 400 820 1322 H bf SR 92 Manual V1 0 ns subject t Contents Se i out prior 1 Introduction 2 2 2 cece cece cece cece eee eeceeeeeeeuuuneeeeeeeeennaaeeeeeeeennnnaeeeetetnnusaees 1 1 1 ONERWVIEN 1 1 2 MAIN ER GE 1 1 3 RECEIVER BPGCIEICATIONS 2 1 4 PROTOCOLS eieiei EE EE EE ee EE 3 1 5 ANTENNA ntaa ATEEN NE OE AOE VEEN TEE E E E etna teseasen 3 2 Hardware Interface 4 2 1 MODULE DImMENSION sess ssse eese eese essnee 4 2 2 PIN ASSIONMENT E E E AE E A A 4 2 3 MODULE PLACEMENT 4 2 4 POWER SAVING cenarios eea a e a Te E ET 5 2 4 1 Power Saving of Trickle Power 5 2 4 2 Power Saving of Adaptive Trickle Power 5 2 4 3 Power Saving of Push TOL IG xo oscats ci scoaisiantaetasena eens ae 5 2 4 4 Power Saving of Power SWUM a EE eaten 6 3 Software Interface 7 3 1 NMEA OUTPUT MESSAGES ccccsssesessssssssssssssssssssssssssssssssssssssssnssssssssssensnenenes H 3 2 GPGGA GLOBAL POSITIONING SYSTEM FIX Data 8 3 3 GPGLL GEOGRAPHIC POSITION LATITUDE LONGITUDE ccceececeeeeeees 8 3 4 GPGSA GNSS DOP AND ACTIVE SATELLITES cccccccccccecccecececececccceececeeeecs 9 3 5 GPGSV GNSS SATELLITES IN NIEWEN 9 3 6 G
5. PRMC RECOMMENDED MINIMUM SPECIFIC GNSS Data 10 3 7 GPVTG COURSE OVER GROUND AND GROUND SPEED 10 3 8 GPZDA SIRF TIMING MpssgAOoE 11 4 Electrical and Environmental Data 12 5 Application EE 13 SR 92 User s Manual V1 0 pacA ma SR 92 Manual V1 0 1 Introduction 1 1 Overview SR 92 is a low power ultra high performance easy to use GPS smart antenna module based on SiRF s third generation single chip Its low power consumption and high performance enables the adoption of handheld applications The slim design allows SR 92 to be placed on topside of the housing to have best GPS signal reception The 5 pin I O interface is then connected to the main board with either connector or wire soldering The integrated antenna design helps reduce the RF and EMI issues to minimum Fast adoption and high yield production becomes possible The power control feature is very convenient to turn on off power via GPIO control pin It s especially useful in cases such as to turn off power as the user just wants to watch a movie and GPS function is not needed in the PMP case 1 2 Main Features Not only handheld but also any other GPS applications can share the following major features of SR 92 Easy adoption with best performance Integrated antenna and EMC protection Built in backup battery allowing hot warm starts and better performance No external component demand just connect and use Minimum RF and EMI efforts Small siz
6. d by request of MOQ SR 92 User s Manual V1 0 pac A ms SR 92 Manual V1 0 2 4 4 Power Saving of Power Switch The Power Switch power saving mechanism will turn off not only the CPU and RF but also the whole engine board In the mean time the backup battery will start to power GPS s RTC and internal memory for better performance The power saving is controlled by the external application via the control pin PWR_CTRL pin 5 The engine board will be on if PWR_CTRL pin is low It would be off if the pin is high or floating The designer has full control of the power supply status of the smart antenna The power saving is also more complete Applications such as PMP navigator may prefer to stop GPS while it just runs movie watching There might be similar demand for different applications This mechanism is achieved by hardware and external control of pin PWR_CTRL is required if this mechanism is used Tie this pin to low if the mechanism is not used SR 92 User s Manual V1 0 pacA ma SR 92 Manual V1 0 3 Software Interface 3 1 NMEA Output Messages The NMEA 0183 Output Messages are shown as below NMEA Record Descriptions GPGGA Global positioning system fixed data time position fixed type GPGLL Geographic position latitude longitude UTC time of position fix and status GPGSA GPS receiver operating mode active satellites and DOP values GPGSV GNSS satellites in view ID number elevation azimuth
7. e of 18 W x 21 L x 7 H mm with patch antenna of 18x18x4mm Fully implementation of ultra high performance SiRF Star II single chip architecture High tracking sensitivity of 159dBm Low power consumption of 40mA at full tracking Hardware power saving control pin allowing power off GPS via GPIO SR 92 could be arranged at best reception location inside housing K A AAA Firmware upgradeable for future potential performance enhancements SR 92 User s Manual V1 0 1 3 Daca ms SR 92 Manual V1 0 Receiver Specifications Features Specifications GPS receiver type 20 channels L1 frequency C A code Horizontal Position Accuracy lt 2 5m Autonomous lt 2 0m WAAS 50 24hr static 1380dBm Velocity Accuracy lt 0 01 m s speed lt 0 01 heading 50 30m s Time accuracy ius or less TTFF Time to First Fix 50 130dBm autonomous Hot Start 1s Warm Start 35s Cold Start 42s Sensitivity Autonomous Tracking 159dBm Acquisition 142dBm Measurement data output Update time 1 second NMEA output protocol V 3 00 Baud rate 4800 default 9600 19200 38400 57600 bps 8 N 1 Datum WGS 84 Default GGA GSA RMC and GSV Other options VTG GLL ZDA or SiRF binary Max Altitude lt 18 000 m Max Velocity lt 1 852 km hr SBAS Support WAAS EGNOS Dynamics lt Ag Power consumption 40mA continuous tracking mode Power
8. e that the backup battery is already included in SR 92 You saved the space charging circuit and related materials To control the power of SR 92 connect the PWR_CTRL pin to a GPIO of micro processor One can pull low it during normal run To cut off the power of SR 92 pull high or just let it floating Tie the PWR_CTRL pin to low if the power saving control feature is not needed All Rights Reserved SR 92 User s Manual V1 0 14
9. er 07 Channel 1 Range 1 to 32 Elevation 79 degrees Elevation angle of satellite as seen from receiver channel 1 00 to 90 Azimuth 048 degrees Satellite azimuth as seen from receiver channel 1 000 to 359 SNR C No 42 dBHz Received signal level C No from receiver channel 1 00 to 99 null when not tracking Satellite ID number 27 Channel 4 Range 1 to 32 Elevation 27 degrees Elevation angle of satellite as seen from receiver channel 4 00 to 90 Azimuth 138 degrees Satellite azimuth as seen from receiver channel 4 000 to 359 SNR C No 42 dBHz Received signal level C No from receiver channel 4 00 to 99 null when not tracking checksum 71 lt CR gt lt LF gt End of sentence SR 92 User s Manual V1 0 KS Daca ms P SR 92 Manual V1 0 3 6 GPRMC Recommended Minimum Specific GNSS Data Example GPRMC 151229 487 A 3723 2475 N 12148 3416 W 0 13 309 62 120598 A 5F Explanation Contents Example Unit Explanation Message ID GPRMC RMC protocol header UTC Time 151229 487 hhmmss sss hh hour mm minute ss second Status A A Data valid V Data invalid Latitude 3723 2475 ddmm mmmm dd degree mm mmmm minute North South N N North Latitude S South Latitude Longitude 12148 3416 dddmm mmmm dd degree mm mmmm minute East West W E East Longitude W West Longitude Speed over ground 0 13 knots Receiver s speed Course over ground 309 62 degre
10. es Receiver s direction of travel Moving clockwise starting at due north Date 120598 ddmmyy dd Day mm Month yy Year Magnetic variation degrees This receiver does not support magnetic declination All course over ground data are geodetic WGS84 directions Mode Indicator A A Autonomous D D GPS N Data not valid checksum DF A Autonomous M Manual D DGPS S Simulation E Dead Reckoning N Data Invalid lt CR gt lt LF gt End of sentence 3 7 GPVTG Course over Ground and Ground Speed Example GPVTG 309 62 T M 0 18 N 0 5 K A OF Explanation Contents Example Unit Explanation Message ID GPVTG VTG protocol header Course over ground 309 62 degrees Receiver s direction of travel Moving clockwise starting at due north geodetic WGS84 directions Reference T True Course over ground degrees Receiver s direction of travel Reference M Magnetic Speed over ground 0 18 knots Measured horizontal speed Unit N Knots Speed over ground 0 5 km hr Measured horizontal speed Unit K km hr Mode Indicator A A Autonomous D DGPS E DR SR 92 User s Manual V1 0 10 KS Ama SR 92 Manual V1 0 checksum OF lt CR gt lt LF gt End of sentence 11 SR 92 User s Manual V1 0 D Daca ms SR 92 Manual V1 0 3 8 GPZDA SIRF Timing Message Example GPZDA 181813 14 10 2006 00 00 4A
11. me interval The biggest time interval to report a position is 10 seconds The on and off ratio is configurable This feature is useful for applications that need to report position regularly while power saving is significant This feature is done by firmware automatically if this feature is enabled The standard firmware does not turn on this feature It could be customized by request of MOQ 2 4 2 Power Saving of Adaptive Trickle Power The adaptive trickle power saving mechanism is basically the same as trickle power saving mechanism with difference that it would not turn the power off if the signal quality is not good enough for tracking Thus it keeps both benefits of performance and power saving intelligently This feature is done by firmware automatically if this feature is enabled The standard firmware does not turn on this feature It could be customized by request of MOQ 2 4 3 Power Saving of Push To Fix The Push To Fix power saving mechanism will not report position data until a specified time interval expires or triggered by external event Typically to keep the up to date position data it would wake up to collect ephemeris and almanac data every 30 minutes The time interval is also configurable This mechanism is especially useful for applications that need position data only on demand This feature is done by firmware automatically if this feature is enabled The standard firmware does not turn on this feature It could be customize
12. supply 3 3V Dimension single side 18 W x 21 L x 7 H mm w 18x18x4 mm patch antenna Operating temperature 40T 85T Storage temperature 40T 125T SR 92 User s Manual V1 0 pacA ms SR 92 Manual V1 0 1 4 Protocols Both NMEA and SiRF binary protocols could be supported via serial UART I O port RXA TXA The default supported protocol is NMEA protocol 1 Serial communication channel i No parity 8 data bit 1 stop bit N 8 1 ii User selectable factory set baudrate among 4800 9600 19200 38400 and 57600 default 4800 bps 2 NMEA 0183 Version 3 00 ASCII output i Default GGA 1 sec GSA 1 sec GSV 3 sec RMC 1 sec ii Optional VTG GLL ZDA 1 5 Antenna SR 92 has a built in patch antenna of dimension 18x18x4mm To have the best performance we suggest tuning the RF antenna together with product s outside shell of housing SR 92 User s Manual V1 0 pacA ma 2 Hardware Interface SR 92 Manual V1 0 2 1 Module Dimension 18mm The dimension of SR 92 is 18 mm W x 21 mm L x 7 mm H with a patch antenna of 18x18x4mm Les _ 2 2 Pin Assignment e es 07M 5 pin Interface Pin Name Function 1 0 1 GND Ground Input 2 VCC Power supply of 3 3 5 5 VDC Input 3 TX Port A serial data output GPS out N 8 1 NMEA v3 00 output Output 4 RX Port A serial data input GPS in N 8 1 accepts commands from external applica
13. tion Message ID GPGGA GGA protocol header UTC Time 101229 487 hhmmss sss hh hour mm minute ss second Latitude 3723 2475 ddmm mmmm dd degree mm mmmm minute North South N N North Latitude S South Latitude Longitude 12158 3416 dddmm mmmm dd degree mm mmmm minute East West W E East Longitude W West Longitude Position Fix Indicator 1 0 Fix not available or invalid 1 GPS SPS Mode fix valid 2 Differential GPS SPS Mode fix valid 3 5 Not supported 6 Dead Reckoning Mode fix valid Satellites Used 07 Number of satellites used in positioning calculation 0 to 12 HDOP 1 0 Horizontal Dilution of Precision MSL Altitude 9 0 meters Unit M Meters Geoidal separation meters Units M Meters Age of Diff Corr second Null fields when DGPS is not used Diff Ref Station ID 0000 checksum 3E lt CR gt lt LF gt End of sentence 3 3 GPGLL Geographic Position Latitude Longitude m Example GPGLL 2446 8619 N 12100 2579 E 060725 000 A A 7E H Explanation Contents Example Unit Explanation Message ID GPGLL GLL protocol header Latitude 2446 8619 ddmm mmmm dd degree mm mmmm minute North South N N North Latitude S South Latitude Longitude 12100 2579 dddmm mmmm dd degree mm mmmm minute East West E E East Longitude W West Longitude UTC Time 060725 000 hhmmss sss hh hour mm minute ss second Status A A Data valid
14. tions e g Input SiRFDemo 5 PWR_CTRL Hardware controlled power saving pin Input If this function is used it is usually connected to a GPIO pin of a micro processor Low for normal run High or floating turn off VCC for power saving Tie it to low if this pin is not used 2 3 Module Placement The SR 92 module could be placed on any location of your product s housing that has best signal reception The 5 pin interface is then connected to your motherboard There are two items that extrude the bottom PCB plane of SR 92 It may affect the placement of SR 92 into your product s housing 1 The antenna is soldered to SR 92 at the bottom via one soldering point The soldering extrudes the bottom PCB plane of SR 92 It is suggested to reserve a hole of 2 mm and depth of 1mm on the under housing 2 The built in battery is also soldered to SR 92 at the bottom via two soldering points The soldering extrudes the bottom PCB plane of SR 92 SR 92 User s Manual V1 0 pac A ma SR 92 Manual V1 0 2 4 Power Saving SR 92 supports various kinds of power saving mechanisms Trickle Power Adaptive Trickle Power Push To Fix and power switch The first three kinds of power saving mechanisms are implemented in software and the power switch mechanism is implemented in hardware 2 4 1 Power Saving of Trickle Power The trickle power saving mechanism is achieved by switching off and on CPU and RF ata fixed ti
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