Navman Jupiter 110 Manuale utente

Related documents

• Jupiter 110 Product brief LA000511

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note LA000513

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MN000315

• SiRF Binary protocol reference manual

Jupiter 110

Integrated GPS Sensor

Module

Data Sheet/

Integrator’s Manual

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Contents

Related documents................................................................................................. 1

1.0 Introduction ....................................................................................................... 4

2.0 Technical description ....................................................................................... 4

2.1 Receiver architecture.................................................................................................... 4

2.2 Major components of the Jupiter 110 ........................................................................... 5

2.3 Product applications..................................................................................................... 5

2.4 Physical characteristics................................................................................................ 5

2.5 Mechanical specication .............................................................................................. 5

2.6 Environmental .............................................................................................................. 5

2.7 Compliances................................................................................................................. 6

2.8 Marking/serialisation .................................................................................................... 6

3.0 Performance characteristics ........................................................................... 7

3.1 TTFF (Time To First Fix)............................................................................................... 7

3.1.1 Hot start ................................................................................................................ 7

3.1.2 Warm start............................................................................................................ 7

3.1.3 Cold start .............................................................................................................. 7

3.2 Acquisition times .......................................................................................................... 7

3.3 Battery backup ............................................................................................................. 7

3.4 Power management ..................................................................................................... 7

3.4.1 TricklePower mode ............................................................................................... 7

3.5 Differential aiding WAAS/EGNOS................................................................................ 8

3.6 Navigation modes......................................................................................................... 8

3.7 Core processor performance ....................................................................................... 8

3.8 Dynamic constraints..................................................................................................... 8

3.9 Position and velocity accuracy ..................................................................................... 8

4.0 Electrical requirements .................................................................................... 9

4.1 Power supply ................................................................................................................ 9

4.2 RF sensitivity................................................................................................................ 9

4.2.1 Internal patch antenna.......................................................................................... 9

4.2.2 External RF connector ......................................................................................... 9

4.3 Data input/output levels...............................................................................................10

5.0 Interfaces......................................................................................................... 10

5.1 External antenna connector ........................................................................................10

5.1.1 External antenna voltage .....................................................................................10

5.2 External I/O connector ................................................................................................11

5.2.1 I/O connector signals...........................................................................................11

5.2.2 I/O connector description....................................................................................11

6.0 Software protocol ........................................................................................... 12

6.1 NMEA output ...............................................................................................................12

6.2 Navman NMEA low power mode messages...............................................................12

6.2.1 Low power conguration .....................................................................................12

6.2.2 Low power acquisition conguration...................................................................13

6.3 Navman NMEA active antenna status message.........................................................13

6.4 SiRF binary output ......................................................................................................13

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Tables

Table 3-1: Acquisition times................................................................................................ 7

Table 3-2: Jupiter 110 processor performance................................................................... 8

Table 3-3: Position and velocity accuracy.......................................................................... 8

Table 4-1: Operating power for the Jupiter 110 .................................................................. 9

Table 4-2: RF sensitivity at patch antenna ......................................................................... 9

Table 4-3: RF sensitivity at external RF connector ............................................................ 9

Table 4-4: Input/output voltage levels ...............................................................................10

Table 5-1: External antenna characteristics ......................................................................10

Table 5-2: Module I/O pinouts ...........................................................................................11

Table 5-3: I/O connector part numbers .............................................................................11

Table 6-1: NMEA default settings......................................................................................12

Table 6-2: Low power modes message values .................................................................12

Table 6-3: Low power acquisition input values..................................................................13

Table 6-4: Antenna status output message values ...........................................................13

Table 10-1: Jupiter 110 ordering information .....................................................................16

Figures

Figure 2-1: Jupiter 110 architecture .................................................................................... 4

Figure 2-2: Application example......................................................................................... 6

Figure 5-1: Pinout I/O connector .......................................................................................11

Figure 9-1: Jupiter 110 mechanical layout .........................................................................15

7.0 Mounting option .............................................................................................. 14

8.0 Product handling............................................................................................. 14

8.1 Packaging and delivery ...............................................................................................14

8.2 ESD sensitivity ............................................................................................................14

8.3 Safety ..........................................................................................................................14

8.4 RoHS compliance .......................................................................................................14

8.5 Disposal ......................................................................................................................14

9.0 Jupiter 110 mechanical layout ....................................................................... 15

10.0 Ordering information .................................................................................... 16

11.0 Glossary and acronyms................................................................................ 16

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LNA

patch

antenna

RTC crystal

serial data in

serial data out

+ power in

GND

RTC backup

battery

backup

RFIC

TCXO

bandpass

lter

2.8 V

regulator

baseband

processor

Flash

memory

1.8 V

regulator

voltage

detector

BOOT CMOS serial IO

external

antenna

sense

external

antenna

input

reset

voltage

detector

antenna

switch

1.0 Introduction

The Jupiter 110 sensor module is based on the SiRFstarIIe/LP navigation engine and provides

OEMs with an ideal integrated solution for cost effective GPS based navigation and tracking

systems.

The module continuously tracks all satellites in view and uses enhanced ltering to provide

fast and accurate positioning information, even in dense urban environments. The sensor

combines advanced performance, compact form factor and very low current consumption in an

economically priced package.

2.0 Technical description

The Jupiter 110 module provides a 12-channel GPS receiver and patch antenna in an open

board design that is compact, versatile and easy to adopt. The Jupiter 110 is available in four

congurations:

• Jupiter 110 (standard) – GSW2 navigation software

• Jupiter 110R – supports an external RF antenna

• Jupiter 110S (high sensitivity) – XTrac positioning software

• Jupiter 110RS – XTrac positioning software and external RF antenna support

The Jupiter 110 variants can be mounted externally or internal to a wide variety of devices,

including PDAs, smartphones, hand-held radios and data terminals.

Protocols supported are selected NMEA (National Marine Electronics Association) data

messages and SiRF binary. The default setting is NMEA-0183 (v2.2).

2.1 Receiver architecture

The functional architecture of the module receiver is shown in Figure 2-1.

Figure 2-1: Jupiter 110 architecture

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2.2 Major components of the Jupiter 110

Antenna: The antenna receives the GPS signals.

LNA (Low Noise Amplier): This amplies the GPS signal and provides enough gain for the

receiver to use a passive antenna. A very low noise design is utilised to provide maximum

sensitivity.

Bandpass lter (1.575 GHz): This lters the GPS signal and removes unwanted signals caused by

external inuences that would corrupt the operation of the receiver.

RFIC (Radio Frequency Integrated Circuit): The RFIC (SiRFstarII GRF 2i/LP), and related

components, convert the GPS signal into an intermediate frequency, and then digitise it for use

by the baseband processor.

TCXO (Temperature Compensated Crystal Oscillator): The highly stable 24.5535 MHz

temperature compensated crystal oscillator is required as the reference for the local oscillator.

Stability in this frequency is required to achieve a fast TTFF (Time To First Fix).

Baseband processor: The SiRFstarII GSP 2e/LP processor is the main engine of the GPS

receiver. It runs all GPS signal measurement code, navigation code, and other ancillary routines,

such as power saving modes. The normal I/O of this processor is via the serial port.

Flash memory: The Flash memory stores software and also some long term data.

RTC (Real Time Clock) crystal: The 32 kHz crystal operates in conjunction with the RTC inside

the baseband block, and provides an accurate clock function when main power has been

removed.

Regulators: The regulators provide a clean and stable voltage supply to the components in the

receiver.

2.3 Product applications

The module is suitable for a wide range of integrated OEM GPS design applications such as:

PDAs and smartphones with integrated navigation

custom navigation and tracking equipment

on-board equipment for eet management

Figure 2-2 shows an example of a personal navigation system based on a Pocket PC, with the

integrated sensor module housed inside a custom ip-up enclosure.

2.4 Physical characteristics

The Jupiter 110 is an open frame structure on a single PCB, with patch antenna mounted on the

upper surface and the GPS receiver components housed on the lower surface.

2.5 Mechanical specication

The physical dimensions of the Jupiter 110 are as follows:

length: 39.0 mm

width: 34.0 mm

thickness (without external RF connector): 6.8 mm

thickness (with external RF connector): 8.3 mm

weight: 11 g

2.6 Environmental

The environmental operating conditions of the Jupiter 110 are as follows:

temperature: –40ºC to +85ºC

altitude: –304 m to 18 000 m

vibration: random vibration IEC 68-2-64

max. vehicle dynamics: 500 m/s

shock (non-operating): 18 G peak, 5 ms

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2.7 Compliances

The Jupiter 110 complies with the following:

Directive 2002/95/EC on the restriction of the use of certain hazardous substances in

electrical and electronic equipment (RoHS)

CISPR22 and FCC: Part 15, Class B for radiated emissions

Automotive standard TS 16949

Manufactured in an ISO 9000 : 2000 accredited facility

2.8 Marking/serialisation

The Jupiter 110 supports a 128 barcode indicating the unit serial number. The Navman

13-character serial number convention is:

characters 1 and 2: year of manufacture (e.g. 06 = 2006, 07 = 2007)

characters 3 and 4: week of manufacture (1 to 52, starting rst week in January)

character 5: manufacturer code

characters 6 and 7: product and type

character 8: product revision

characters 9-13: sequential serial number

•

Figure 2-2: Application example

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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

specication will vary with the operating state of the receiver, the length of time since the last

position x, the location of the last x, and the specic receiver design.

3.1.1 Hot start

A hot TTFF 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, time and satellite ephemeris) is valid

to the specied accuracy and available in SRAM.

3.1.2 Warm start

A warm TTFF typically results from user-supplied position and time initialisation data or

continuous RTC operation with an accurate last known position available. In this state,

position and time data are present and valid but ephemeris data validity has expired.

3.1.3 Cold start

A cold TTFF acquisition state results when position or time data is unknown. Almanac

information stored in Flash memory 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

J110/J110R J110S/J110RS

Typ 90% Typ 90%

TTFF hot (valid almanac, position, time & ephemeris) 8 s 12 s 8 s 12 s

TTFF warm (valid almanac, position & time) 38 s 42 s 38 s 40 s

TTFF cold (valid almanac) 44 s 55 s 45 s 56 s

re-acquisition (<10 s obstruction with valid almanac,

position, time & ephemeris) 100 ms 100 ms 100 ms 100 ms

Table 3-1: Acquisition times

3.3 Battery backup

The battery backup input line powers the RTC section of the baseband receiver. Supplying

power to this pin is required for normal operation and ensures that the RTC continues to operate

even when the main power is interrupted. Refer to Table 4-1 for the Jupiter 110 battery backup

supply voltages.

3.4 Power management

During normal operating mode the Jupiter 110 runs continuously, providing a navigation solution

at a maximum rate of once per second. This continuous mode provides no power saving. For

power saving, TricklePower mode can be set using NMEA or SiRF Binary messages.

3.4.1 TricklePower mode

The TricklePower mode can be enabled to reduce average power consumption. The main

power is supplied to the module continuously. An internal timer wakes the processor from

sleep mode. The module computes a navigation position x, after which the processor

reverts to sleep mode. The duty cycle is controlled by a user-congurable parameter.

If ephemeris data become outdated, the TricklePower mode will attempt to refresh the data

set within every 30 minute period, or for every new satellite that comes into view.

With TricklePower set to a 20% duty cycle, a power saving of 50% can easily be achieved

with minimal degradation in navigation performance.

In Adaptive TricklePower mode, the processor automatically returns to full power when signal

levels are below the level at which they can be tracked in TricklePower mode.

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If the ephemeris data become invalid, the RTC has the ability to self activate and refresh the

data, thus keeping the restart TTFF very short.

For further information about TricklePower refer to the Low Power Operating Modes

application note (LA000513).

3.5 Differential aiding WAAS/EGNOS

The Jupiter 110 is capable of receiving WAAS and EGNOS differential corrections. WAAS/

EGNOS improves horizontal position accuracy to <6 m 2 dRMS by correcting GPS signal errors

caused by ionospheric disturbances, timing and satellite orbit errors.

3.6 Navigation modes

The Jupiter 110 supports 3D (three-dimensional) and 2D (two-dimensional) modes of navigation.

3D navigation: the receiver defaults to 3D navigation when at least four GPS satellites are

being tracked. In 3D navigation, the receiver computes latitude, longitude, altitude, and time

information from satellite measurements.

2D navigation: when less than four GPS satellite signals are available, or when a xed altitude

value can be used to produce an acceptable navigation solution, the receiver will enter 2D

navigation using a xed value of altitude determined by the host. Forced operation in 2D mode

can be commanded by the host.

In 2D navigation, the navigational accuracy is primarily determined by the relationship of the

xed altitude value to the true altitude of the antenna. If the xed value is correct, the specied

horizontal accuracies apply. Otherwise, the horizontal accuracies will degrade as a function of

the error in the xed altitude.

3.7 Core processor performance

The standard Jupiter 110 with GSW2 software runs at a CPU clock speed of 12.28 MHz. Using

XTrac software (Jupiter 110S and 110RS), the clock speed increases to 24.5 MHz. An SDK

(Software Development Kit) is available from SiRF to customise the Jupiter 110 rmware. Using

the SiRF SDK the clock speed can be increased up to 49 MHz.

The processor performance of the Jupiter 110 is shown in Table 3-2.

Parameter J110/J110R J110S/J110RS

typical performance 2-3 MIPS 4-5 MIPS

peak performance 6-7 MIPS 8-9 MIPS

Table 3-2: Jupiter 110 processor performance

3.8 Dynamic constraints

The Jupiter 110 is programmed to lose track if any of the following limits is exceeded:

Velocity: 500 m/s max

Acceleration: 4 G (39.2 m/s/s) max

Altitude: 18 000 m

3.9 Position and velocity accuracy

Position and velocity accuracy of the Jupiter 110 are shown in Table 3-3, assuming full accuracy

C/A code. These values are the same in normal operation and when TricklePower is active.

Parameter J110/J110R J110S/J110RS

horizontal CEP 2.2 m 3.0 m

horizontal (2 dRMS) 5.5 m 6.0 m

vertical VEP 2.5 m 5.0 m

3D SEP 5.0 m 5.0 m

velocity 3D (2 sigma) 0.1 m/s 0.1 m/s

Table 3-3: Position and velocity accuracy

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4.0 Electrical requirements

4.1 Power supply

The module is designed to operate using the supply voltages shown in Table 4-1. These values

do not include external antenna current on the J110R and J110RS.

Parameter J110/J110R J110S/J110RS

input voltage 3.0 to 3.6 VDC 3.0 to 3.6 VDC

current (typ) at full power (3.3 VDC) 75 mA 85 mA

current (max) 100 mA 100 mA

current (typ) at 20% TricklePower 35 mA 60 mA

battery backup voltage 2.0 to 3.6 VDC 2.0 to 3.6 VDC

battery backup current (non-operating) <10 µA at 25ºC <10 µA at 25ºC

battery backup current (operating mode) 18 µA typ, 50 µA max 18 µA typ, 50 µA max

Table 4-1: Operating power for the Jupiter 110

4.2 RF sensitivity

4.2.1 Internal patch antenna

The RF sensitivity measured at the internal patch antenna is shown in Table 4-2.

Parameter J110 J110S

acquisition sensitivity 33 dBHz 30 dBHz

tracking sensitivity 25 dBHz 14 dBHz

navigation sensitivity 28 dBHz 17 dBHz

Table 4-2: RF sensitivity at patch antenna

4.2.2 External RF connector

The RF sensitivity measured at the external RF connector using a 21 dB gain amplier is

shown in Table 4-3.

Parameter J110R J110RS

acquisition sensitivity –135 dBm –138 dBm

tracking sensitivity –144 dBm –155 dBm

navigation sensitivity –141 dBm –154 dBm

Table 4-3: RF sensitivity at external RF connector

Note: The external antenna input requires additional signal gain in the external antenna.

4.3 Data input/output levels

All communication between the Jupiter 110 and external devices is through the I/O (input/output)

connector. The I/O data is CMOS serial.

The I/O connector voltage levels measured at PWR_IN = 3 V are shown in Table 4-4.

Signals Parameter Value

TXD, RXD

& BOOT

VIH (min) 2.0 V

VIH (max) PWR_IN +0.1

VIL (min) 0.1 V

VIL (max) 0.8 V

VOH (min) at IOH 0.5 mA 2.0 V

VOH (max) PWR_IN

VOL (min) 0

VOL (max) at IOL –0.5 mA 1.0 V

Table 4-4: Input/output voltage levels

5.0 Interfaces

5.1 External antenna connector

The RF connector for the external antenna is an MMCX type jack straight connector. This

connector is available on the Jupiter 110R and the Jupiter 110RS.

5.1.1 External antenna voltage

DC power is supplied to the external antenna from the main power supply via the internal

antenna selection switch.

The external antenna characteristics are shown in Table 5-1.

Parameter External

antenna current Notes

internal patch antenna to external

antenna switchover threshold 5 mA

external antenna to internal patch

antenna switchover threshold 1 mA

reducing the external antenna current

from 5 to 1 mA will result in switchback

to the internal patch antenna

external antenna over current

latch threshold 80 mA

external antenna over current

reset threshold 200 µA

reducing the current from 80 mA to

200 µA, or no load, will result in the

DC supply being made available to the

internal patch antenna. To reset the

‘over current’ trip, remove power from

the unit for >3 s.

Table 5-1: External antenna characteristics

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