C3-470A Jnavi SPECSHEET
JCOM MODEL NAME CODE NO.
CUSTOMER MODEL NAME
GR - C3-470A - XXXX - T - P
C3-470A
APPROVAL INVESTIGATION INSPECTION
J communications co., Ltd.
J communications co., Ltd. 1/20 Ver: 1.0 www.jcomco.com
C3-470A-Jnavi HighPerformance GPS Receiver
Contents
1. Functional Description
1.1 Features 1.2 Block Diagram
1.3 Receiver Unit Specifications 1.4 Protocols
2. Interface Specification
2.1 Pin Description 2.2 I/O Pin Command Level
2.3 Serial Interfaces Setting(User programmable setting command)
3. Electrical Specification
3.1 Absolute Maximum Ratings 3.2 Operating Conditions 3.2.1 DC Characteristics 3.2.2 AC Characteristics
3.2.3 Active Antenna Selection(Recommend) 3.2.4 RF Input Impedance
4. Performance Specification
4.1 3D Tracking Sensitivity (Level Decrease) 4.2 3D Re-Tracking Sensitivity (Level Increase) 4.3 Temperature & Sensitivity
5. Mechanical Dimension & Pin Description
6.
J communications co., Ltd. 2/20 Ver: 1.0 www.jcomco.com
C3-470A-Jnavi HighPerformance GPS Receiver 1. Functional Description 1.1 Features Fully self-contained GPS receiver Fully shield Full implementation of SiRFstarTMIII GPS architecture GSC3F(High Performance GPS Single Chip) GPS DSP with integrated real time clock(RTC) ARM7TDMI CPU 4Mbit FLASH memory Low noise amplifiers and SAW filters. TCXO, Reset & Regulator etc Built-In Back-up Battery GPS receiver With Patch Antenna Selectable internal/external RF connector Patch Antenna Size : 35(w)mm X 35(d)mm X 3(h)mm Size : 39.0(w)mm X 35.5(d)mm X 8.0(h)mm Weight : 21.5 grams 1.2 Block Diagram J communications co., Ltd. 3/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver
1.3 Receiving Unit Specifications
Receiver type : L1 frequency, C/A Code, 20-channel Max up-date rate : 1 sec
Accuracy (SA off) : Position < 10m 3DRMS
3D Tracking Sensitivity : -156dBm at the receiver input(typical) Operational Limits : Altitude < 18,000m (60,000ft)
Velocity < 515m/s (1,000knots)
Time To First Fix (TTFF)
a) Cold Start 60sec (typical)
In a ‘Cold Start’ scenario, the receiver has no knowledge of position, time or the satellite constellation. The receiver starts to search for signals blindly. Cold start time is the longest startup for this module
b) Warm Start 40sec (typical)
In a ‘Warm Start’ scenario, due to a backup battery the receiver knows its last poison, the approximate time and the constellation almanac.
Thanks to this it can quickly acquire satellites and gat a position fix faster then in ‘Cold Start’ mode.
c) Hot Start < 3sec (typical)
In a ‘Hot Start’ scenario, the receiver has been powered off for less then 2 hours since the last valid navigation solution. The GPS uses its last Ephemeris data to calculate a position fix.
Re-acquisition time 5sec typical (within 60sec GPS signal obstruction)
1.4 Protocols
NMEA 0183 (default) 9600bps
User programmable setting for baud rate, NMEA & Interval time
by user define message setting Command. (see 2.3 Serial Interface Setting)
J communications co., Ltd. 4/20 Ver: 1.0 www.jcomco.com
C3-470A-Jnavi HighPerformance GPS Receiver
Output Messages
Table 1-1 lists each of the NMEA output messages specifically developed and defined by SiRF for use within SiRF products.
Table 1-1 NMEA Output Message
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 RMC Time, date, position, course and speed data. VTG Course and speed information relative to the ground. 150 OK to send message.
A full description and definition of the listed NMEA messages are provided by the next sections of this chapter.
Table 1-2 provides a summary of supported SiRF NMEA output messages by the specific SiRF platforms.
Table 1-2 Supported NMEA
Message SiRF Software Options GGA Yes GLL Yes GSA Yes GSV Yes RMC Yes VTG Yes
J communications co., Ltd. 5/20 Ver: 1.0 www.jcomco.com
C3-470A-Jnavi HighPerformance GPS Receiver
GGA ―Global Positioning System Fixed Data
Table 1-3 contains the values for the following example:
$GPGGA, 161229,487,3723,2475,N,12158,3416,W,1.07,1.0,9.0,M….0000*18
Table 1-3 GGA Data Format
Name Example Units Message ID UTC Time
$GPGGA 161229,487
Description
GGA protocol header hhmmss,sss
Latitude 3723,2475 ddmm,mmmm N/S Indicator
N
N-north or s-south
Longitude 12158,3416 dddmm,mmmm E/W Indicator Position Fix Indicator Satellites Used HDOP MSL Altitude
W I 07 1.0 9.0
Meters
E=east or W=west See Table 1-4 Range 0 to 12
Horizontal Dilution of Precision
Units M Meters Geoid Separation
Meters
Units M Meters Age of Diff. Corr. Diff. Ref. Station ID
0000
Second
Null fields when DGPS is not used
Checksum *18 Table 1-4 Position Fix Indicator End of message termination Value Description 0 1 2 Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid 3-5 Not supported 6 Note – A valid position fix indicator is derived from the SiRF Binary M.I.D. 2position mode1 See the SiRF Binary Reference Manual J communications co., Ltd. 6/20 Ver: 1.0 www.jcomco.com Dead Reckoning Mode, fix valid C3-470A-Jnavi HighPerformance GPS Receiver GLL-Geographic Position-Latitude/Longitude Table 1-5 contains the values for following example: $GPGLL, 3723.2475,N,12158.3416,W,161229.487,A,A*41 Table 1-5 GLL Data Format Name Example Units Message ID $GPGLL GLL protocol header Description Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator UTC Time Status Mode W 161229.487 A A E=east or W=west hhmmss.sss A= data valid or V=data not valid A=Autonomous, D=DGPS, E=DR Checksum *41 End of message termination J communications co., Ltd. 7/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver GSA-GNSSDOP and Active Satellites Table 1-6 contains the values for the following example: $GPGSA,A,3, 07,02,26,27,09,04,15,,,,,,,,1.8,1.0,1.5*33 Table 1-6 GSA Data FormatName Example Units Message ID Mode 1 Mode 2 Satellite UsedSatellite Used 111 Description $GPGSA A 3 07 02 GSA protocol header See Table 1-7 See Table 1-8 Sv on Channel 1 Sv on Channel 2 .... .... Satellite UsedPDOP HDOP VDOP 1.8 1.0 1.5 Sv on Channel 12 Position Dilution of Precision Horizontal Dilution of Precision Vertical Dilution of Precision Checksum *33 1. End of message termination Satellite used in solution Table 1-7 Mode 1 Value Description M A Table 1-8 Mode 2 Value Description 1 Fix not Available 2 2D(<4SV's used) 3 3D(>3SV's used) Manual-forced to operate in 2D or 3D mode 2Dautomatic-allowed to automatically switch 2D/3D J communications co., Ltd. 8/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver GSV-GNSS Satellite in View Table 1-9 contains the values for the following 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 Table 1-9 GSV Data Format Name Example Units Message ID Number of MessagesMessage NumberSatellites in View Satellite ID Elevation Azimuth SNR(c/No) 1 1 Description $GPGSV 2 1 07 07 79 048 42 degrees degrees dBHz GSV protocol header Range 1 to 3 Range 1 to 3 Channel 1 (Range 1 to 32) Channel 1 (Maximum 90) Channel 1 (True, Range 0 to 359) Range 0 to 99, null when not tracking …. …. Satellite ID Elevation Azimuth SNR(C/No) 27 27 138 42 degrees degrees dBHz Channel 4 (Range 1 to 32) Channel 4 (Maximum 90) Channel 4 (True, Range 0 to 359) Range 0 to 99, null when not tracking Checksum *71 End of message termination 1. Depending on the number of satellites tracked multiple messages of GSV data may be required. J communications co., Ltd. 9/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver RMC-Recommended Minimum Specific GNSS Data Table 1-11 contains the values for the following example: $GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598, ,*10 Table 1-11 RMC Data Format Name Message ID UTC Time Status Latitude N/S Indicator Longitude E/W Indicator Example $GPRMC 161229.487 A Units Description RMC protocol header hhmmss.mmmm A=data valid or V=data not valid ddmm.mmmm 3723.2475 N=north or S=south N 12158.3416 ddmm.mmmm E=east or W=west W Speed over Ground Course over Ground 0.13 309.62 knots degrees True Date 120598 ddmmyy Magnetic Variation degrees E=east or W=west Checksum *10 1. 2. End of message termination A valid status is derived from the SiRF Binary. M.I.D 2 position mode 1. See the SiRF Binary Reference Manual. SiRF Technology Inc. dose not support magnetic declination. All “course over ground” data are geodetic WGS84 directions. J communications co., Ltd. 10/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver VTG-Course Over Ground and Ground Speed Table 1-12 contains the values for the following example: $GPVTG,309.62,T, ,M,0.13,N,0.2,K,A*23 table 1-12 VTG Data Format Name Message ID Example Units Description $GPVTG VTG protocol header Course 309.62 degrees Measured herding Reference T True 1 Course Reference M degrees Measured heading Magnetic Speed 0.13 knots Measured Horizontal speed Units N knots km/hr Measured horizontal speed Kilometers per hour A=Autonomouse, D=DGPS, E=DR Speed 0.2 Units K Mode A Checksum *23 End of message termination 1. SiRF Technology Inc. dose not support magnetic declination. All “course over ground” data are geodetic WGS84 directions. J communications co., Ltd. 11/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 2. Interface Specification 2.1. Pin Description Pin no 1 Name EN Pin Description Supply regulator enable I/OI Note Open or low then enable 2.0v~VCC then disable 2 VCC(5.0V) Supply Voltage 3 TXA 4 RXA Serial TX Port A Serial RX Port A 5 GND Ground I Module boots into special debug Mode if VCC during reset I Used O Used I Used 6 BOOT Module Boots Port 5.0V : Boot ON N.C : Boot OFF 2.2 I/O Pin Commend LevelRXA Input Level J communications co., Ltd. 12/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 2.3 Serial Interfaces Setting MESSAGE COMMAND COLD START WARM START HOT START FACTORY RESET $PSRF101,0,0,0,000,0,0,12,4*10 $PSRF101,0,0,0,000,0,0,12,2*16 $PSRF101,0,0,0,000,0,0,12,1*15 $PSRF101,0,0,0,000,0,0,12,8*1C Customer Define Message Setting Command Table 2.3 contains the values for the following example: $PSRF201,NMEA9600,NULL38400,GGA1,GLL0,GSA1,GSV1,RMC1,VTG0,USER0*0D 2.3 Data Format Table Name Message ID Example Units Description $PSRF Protocol Header 201 Measured heading Protocol(Port A) Baudrate(Port A) Protocol(Port B) Baudrate(Port B) NMEA 9600 NULL 38400 Data Format bps Data Format bps sec sec sec sec sec sec NULL, NMEA, Jcom(Customer Dependency) 4800, 9600, 19200, 38400, 57600 NULL, NMEA, Jcom(Customer Dependency) 4800, 9600, 19200, 38400, 57600 GGA Data Output Interval Time 1sec (0∼10sec Selectable)GLL Data Output Off (0∼10sec Selectable) GSA Data Output Interval Time 1sec (0∼10sec Selectable)GSV Data Output Interval Time 1sec (0∼10sec Selectable) RMC Data Output Interval Time 1sec (0∼10sec Selectable)VTG Data Output Off(0∼10sec Selectable) Customer Option(Default 0) GGA Interval Time GGA1 GLL Interval Time GSA Interval Time GSV Interval Time RMC Interval Time VTG Interval Time GLL0 GSA1 GSV1 RMC1 VTG0 USER Interval Time USER0 Checksum *0D See Below*1 End of message termination J communications co., Ltd. 13/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 3. Electrical Specification 3.1 Absolute Maximum Ratings Parameter Min Max Unit Power supply voltage(VCC) Serial port Input pin voltage Storage temperature Warning – Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage. These are stress ratings only. Operation beyond “Operating conditions” is not recommended and extended exposure beyond the “Operating condition” may affect device reliability. 3.6 -0.3 -20 5.5 5.0 +80 V V 3.2 Operating Conditions 3.2.1 DC Characteristics ( Test Temperature : 25) Parameter Condition Min Typical Max Unit Operating supply voltage Operating supply ripple voltage Sustained supply current Peak supply current RXA TTL H Level RXA TTL L Level TXA TTL H Level TXA TTL L Level VCC VCC=5.0V VCC=5.0V VCC=5.0V VCC=5.0V VCC=5.0V VCC=5.0V 3.6 80 85 2.1 0 2.1 0 5.0 85 90 5.5 50 90 95 VCC 0.9 2.8 0.8 V mVppmA mA V V V V External Antenna Output Voltage VCC=5.0V 2.7 2.8 2.9 V External Antenna Output Current Operating temperature * VCC=5.0V VCC=5.0V - -20 - +25 20 +60 mA * Operating Temperature GPS DEVICE : -40 ~ +80 BACK-UP BATTERY : -20 ~ +60 (Lithium-Ion Rechargeable Battery) J communications co., Ltd. 14/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 3.2.2 AC Characteristics ( Test Temperature : 25 VCC = 5.0V Internal Antenna Input : Conducted ) Parameter Condition Min TypicalMax Unit Tracking Sensitivity (C/N) Re-acquisition Sensitivity (C/N) Cold start Sensitivity (C/N) Cold start time(TTFF) Hot start time Re-acquisition time (5 sec) Re-acquisition time (60 sec) Position error (Latitude, Longitude) Position error (Elevation) 3D (C/N avg. 13dBHz) 3D (C/N avg. 16dBHz) 3D (SV 9EA in view) -126 dBm(2D) (SV 9EA) -126 dBm(2D) (SV 9EA) -126 dBm(3D) (SV 9EA) -126 dBm(3D) (SV 9EA) -126 dBm(SV 9EA in View)-126 dBm(SV 9EA in View) 25 -156 -153 -135 60 1 3 3 10 50 50 100 dBm dBm dBm sec sec sec sec m m External ANT Connector Impedance 3.2.3 Active Antenna Selection Guide Recommend Parameter Condition Frequency 1575.42MHz Polarization RHCP V.S.W.R Less than 2.0 Impedance 50 LNA Gain Noise Figure Axial Ratio Band Attenuation 26dB2dB 1.5dB(Max) 3dB(Max) 20dB(Min) @FO50MHz Voltage DC 3V(10%) Current 20mA(Max) J communications co., Ltd. 15/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 3.2.4 RF Input Impedance J communications co., Ltd. 16/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 4 Performance Specification 3D Tracking Sensitivity C/N [dB/Hz]6050403020100-116-120-124-128-132-136-140-144-148-152-1527080Input Level [dBm] 3D Re-Tracking Sensitivity C/N [dB/Hz]5550454035302520151050-116-120-124-128-132-136-140-144-148-15690 Input Level [dBm] Temperature & Sensitivity (Input : -130dBm)Sensitivity [dB-Hz]4039383736353433323130-40-30-20-1001020304050Temperature []60J communications co., Ltd. 17/20 Ver: 1.0 www.jcomco.com -156 C3-470A-Jnavi HighPerformance GPS Receiver 5. Mechanical Dimension & Pin Description J communications co., Ltd. 18/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver Maker : Yeonho Electronics J communications co., Ltd. 19/20 Ver: 1.0 www.jcomco.com C3-470A-Jnavi HighPerformance GPS Receiver 6. Packing Description J communications co., Ltd. 20/20 Ver: 1.0 www.jcomco.com 因篇幅问题不能全部显示，请点此查看更多更全内容