JS-3M

CO E L NF IM ID IN EN AR TI Y AL Datasheet (Preliminary) JS-3M PR Extra Low Power Smart GPS Sensor July 17, 2011 Related Documents • Navman Wireless OEM NMEA reference manual • SiRF Binary Protocol reference manual Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com JS-3M | Datasheet (Preliminary) CONTENTS 1.0 Introduction........................................................................ 1 2.0 Technical description. ..................................................... 1 Tables Table 3-1: Acquisition times at –125 dBm............................. 5 Table 3-2: Sensitivity...................................................................... 7 Table 3-3: Position and velocity accuracy.............................. 7 Table 4-1: Power consumption (continuous mode).......... 8 Table 5-1: Default NMEA messages......................................... 9 Table 5-2: Proprietary message parameters......................... 9 Table 5-3: Proprietary NMEA input messages.....................10 Table 7-1: Ordering information..............................................10 PR CO E L NF IM ID IN EN AR TI Y AL 2.1 Product applications.......................................................... 1 2.2 Receiver architecture.......................................................... 2 2.3 Physical characteristics...................................................... 2 2.4 Mechanical specifications – Physical dimensions and pin out assignments.................................................. 3 2.4.1 JS-3M – Physical dimensions........................................... 3 2.5 Environmental...................................................................... 4 3.0 Performance characteristics......................................... 5 3.1 TTFF (Time To First Fix)...................................................... 5 3.1.1 Hot start.................................................................................. 5 3.1.2 Warm start.............................................................................. 5 3.1.3 Cold start................................................................................. 5 3.2 Acquisition times................................................................. 5 3.3 Two LED indicators.............................................................. 6 3.4 Power management........................................................... 6 3.4.1 Adaptive TricklePower....................................................... 6 3.5 Differential aiding................................................................ 6 3.5.1 Satellite Based Augmentation Systems (SBAS)......... 6 3.6 Sensitivity............................................................................... 7 3.7 Dynamic constraints........................................................... 7 3.8 Position and velocity accuracy....................................... 7 3.9 Multi-mode aiding.............................................................. 7 4.0 Electrical requirements....................................................8 4.1 Power consumption............................................................8 4.2 Electrical connections.........................................................8 4.3 Back-up battery.................................................................... 8 5.0 Software interface............................................................. 9 5.1 NMEA output messages.................................................... 9 5.1.1 Proprietary NMEA messages........................................... 9 5.1.2 Proprietary NMEA input messages...............................10 6.0 Product handling..............................................................10 6.1 Packaging and delivery....................................................10 6.2 Safety.......................................................................................10 6.3 Disposal..................................................................................10 7.0 Ordering information. ....................................................10 8.0 Glossary and acronyms..................................................11 Figures Figure 2-1: ................................................... Receiver architecture 2 Figure 2-2: .....................................JS-3M – Physical dimensions 3 Figure 3-1: ............................................. LED indicator duty cycle 6 Figure 4-1: .........RJ11 connector and electrical connections 8 Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com JS-3M | Datasheet (Preliminary) 1.0  Introduction JS-3M from Jupiter Solutions is a complete GPS receiver that has included the magnetic mount plastic housing and high performance J-3A GPS receiver board. This datasheet specifies the performance of the 20-channel ultra-high sensitivity J-3A receiver board which is based on the proven Jupiter3 GPS module. JS-3M provides the fastest TTFF (Time to First Fix) possible for all weather conditions, in challenging environments such as densely built cities, heavy foliage, and enclosed spaces. Jupiter Solutions is offered in volume purchase as indicated in Section 7 Ordering Information. 2.0  Technical description JS-3M has enhanced the architecture of the Jupiter3 module by adding carefully selected key components including antenna, LNA, LDO, back-up battery and driver to comprise the complete receiver solution. This ensures frequency stability, optimized sensitivity at chipset level down to –159 dBm, lower power consumption and a faster TTFF (Time To First Fix). CO E L NF IM ID IN EN AR TI Y AL By providing the on-board micro-battery, the JS-3M allows rapid satellite acquisition times by preserving system data in SRAM and the power to the RTC section of the Jupiter3 module. Protocols supported are selected NMEA (National Marine Electronics Association) data messages and SiRF Binary. 2.1  Product applications The JS-3M offers high performance and maximum flexibility in a wide range of OEM configurations. The four pins digital interface makes it ideal for: • navigation systems – where athermic glass, or an unsuitably positioned antenna inside the vehicle will reduce visibility and signal strength • vehicle and people tracking devices – where satellites are obstructed by partially covered car parks and walkways, tracking even continues indoors • marine buoys – where multipath and unstable sea conditions make satellite visibility irregular PR • asset tracking – where construction machinery is located in covered yards and areas of dense foliage • people tracking - home detention and house arrest applications, emergency location services Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com 1 JS-3M | Datasheet (Preliminary) 2.2  JS-3M functional architecture 5V for RS-232 main power brown-out detector regulator VDD_RTC regulator Micro Battery Jupiter3 VCC_RF  VDD_BB   SRESET  VDD_RTC TCXO LNA SAW Filter CO E L NF IM ID IN EN AR TI Y AL Antenna GSC3f/LP Combined RF/baseband device/1Mb SRAM 4Mb Flash device RTC crystal 1 PPS GPS FIX UART Red LED Orange LED Isolator/Driver RS-232 Interface Figure 2-1: JS-3M GPS Receiver Architecture 2.3  Physical characteristics PR The JS-3M is a complete GPS sensor within an enclosed housing that is waterproof to IPx7. The standard cable is 3m in length with a RJ11 connector. If customization on cable length and connector are required, please contact our sales manager for details. Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com 2 JS-3M | Datasheet (Preliminary) 2.4  Mechanical specification 2.4.1  JS-3M: Physical dimensions Dimensions in mm: 51 max 3000 ± 100 (RJ11) RJ11 1 6 1: NC 4: TX 2: GND 5: VDD 3: RX 6: NC PR 15 max CO E L NF IM ID IN EN AR TI Y AL 41 max Figure 2-2: JS-3M: Physical dimensions Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com 3 JS-3M | Datasheet (Preliminary) 2.5  Environmental Environmental operating conditions: operating temperature (Topr): –20ºC to +60ºC storage temperature (Tstg): –40ºC to +60ºC (25ºC typical) humidity: up to 95% non-condensing or a wet bulb temperature of +35ºC altitude: –304 m to 18 000 m vibration: random vibration IEC 68-2-64 max. vehicle dynamics: 500 m/s PR CO E L NF IM ID IN EN AR TI Y AL shock (non-operating): 50 G peak, 11 ms Navman Wireless OEM Solutions • 27422 Portola Parkway -Suite 320; Foothill Ranch, CA 92610 TEL: +(949) 461-7150 • FAX: +(949) 461-7860 • www.navmanwirelessoem.com 4 JS-3M | Datasheet (Preliminary) 3.0  Performance characteristics 3.1  TTFF (Time To First Fix) TTFF is the actual time required by a GPS receiver to achieve a position solution. This specification will vary with the operating state of the receiver, the length of time since the last position fix, the location of the last fix, and the specific receiver design. Aiding is a method of effectively reducing the TTFF by making every start Hot or Warm. 3.1.1  Hot start A hot start results from a software reset after a period of continuous navigation, or a return from a short idle period (i.e. a few minutes) that was preceded by a period of continuous navigation. In this state, all of the critical data (position, velocity, time, and satellite ephemeris) is valid to the specified accuracy and available in SRAM. Battery backup of the SRAM and RTC during loss of power is required to achieve a hot start. CO E L NF IM ID IN EN AR TI Y AL 3.1.2  Warm start A warm start typically results from user-supplied position and time initialization data or continuous RTC operation with an accurate last known position available in memory. In this state, position and time data are present and valid but ephemeris data validity has expired. 3.1.3  Cold start A cold start acquisition results when either position or time data is unknown. Almanac information is used to identify previously healthy satellites. 3.2  Acquisition times Table 3-1 shows the corresponding TTFF times for each of the acquisition modes. Mode PR hot start TTFF @ –125 dBm Typ 90% 500 ms