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LA000510C © 2006 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.

Figure 4-1 Development Unit test equipment

The Development Unit should be set up as shown in Figure 4-1 with only the RTCM correction 

source connected to the receiver. If the RTCM cable is not connected to the receiver’s auxiliary 

port, DGPS operation will not be possible. When RTCM data is being received the AUX LED will 

be lit.

Note:

 the Development Unit may be connected to either the COM1, COM2, COM3, or COM4 

serial ports and the RTCM differential correction data source connected either directly to 
the receiver’s auxiliary I/O port, to one of the remaining serial ports of the PC, or to both 

using an OEM-supplied three-connector serial cable.

4.4 Operating the GPS Analyser software

There are two software packages supplied with the GPS Development kit: SiRFDemo and 

SiRFFlash. The VisualGPS program can be obtained free of charge from the VisualGPS website 

 

(

www.visualgps.net/VisualGPS/

).

4.4.1 VisualGPS

VisualGPS graphically presents the serial data transmitted by the receiver. The receiver output 

must be enabled in the NMEA protocol for this software to be used.

To enable the receiver output

1. Open the VisualGPS software installed on the PC.
2. Select the Settings>Communications tab. 
3. When the Communications Settings window is displayed, select the correct COM Port and set 

the Baud rate to 9600 Baud.

When this has been carried out, and the Development Unit is powered, raw NMEA data should 

appear in the NMEA Monitor Window. For more detailed information on any of the analysis 

windows, use the Help function in the top toolbar. 

4.4.2 SiRFDemo

SiRFDemo software can provide analysis of receiver output in either SiRF binary or NMEA 

protocols. When enabled in NMEA format, the only analysis provided is raw data being 

transmitted by the receiver. While the module is transmitting serial data in NMEA format, it is 

suggested that VisualGPS is used for analysis, rather than SiRFDemo. 

To provide graphical presentation of the data, the receiver can be set to output in SiRF binary 

format. 

RTCM DGPS

 

data source

optional connection for logging RTCM data

monitor

antenna

power

optional antenna 

or pre-amplifier 

development unit

PC

Summary of Contents for LA000507

Page 1: ...dead reckoning TU20 D421 201 Related documents Jupiter 20 Product brief LA000509 Jupiter 20 Data sheet LA000507 Jupiter 20 DR Application note LA000433 Jupiter 30 20 Integrator s manual LA000577 SiRF...

Page 2: ...DIP switch 6 Antenna preamp power select 3 3 V or 5 12 V 8 3 2 7 DIP switch 7 Antenna preamp power select 5 V or 12 V 8 3 2 8 DIP switch 8 Antenna preamp power enable 8 3 3 Function LEDs 8 3 3 1 1PPS...

Page 3: ...4 Pin layout of the clock out connector 9 Figure 3 5 Internal layout of the Development Unit 9 Figure 3 6 Jupiter 20 adapter board 11 Figure 4 1 Development Unit test equipment 13 Figure 5 1 DR interf...

Page 4: ...rce for SRAM and RTC Provision to insert a current measuring device to monitor both primary and backup power usage under various conditions Regulated DC power supply to the Jupiter 20 module Status in...

Page 5: ...alysis software are also provided to allow communication with the Jupiter 20 GPS receiver through a serial port This Windows based software presents the receiver s raw data in a geographical form allo...

Page 6: ...r of the unit will stop secondary power being applied assuming Jumper JB5 6 and switch 5 are correctly set Having this secondary power supply applied means that the Jupiter 20 will have a hot start ca...

Page 7: ...FR OFF high 3 Serial BOOT OFF normal run 4 GPIO1 W_TICKS OFF high 5 RTC BACKUP POWER ON enabled 6 PREAMP power select OFF 3 V 7 PREAMP power select OFF 12 V 8 PREAMP power enable ON enabled These fun...

Page 8: ...s of switches 7 and 8 also need to be considered when using the preamp function Note the supplied antenna is a 3 3 V type 3 2 7 DIP switch 7 Antenna preamp power select 5 V or 12 V DIP switch 7 also c...

Page 9: ...round Table 3 2 Pin functions of the clock out connector 4 3 2 1 Figure 3 4 Pin layout of the clock out connector A mating connector for the clock out connector is supplied with the Development kit Th...

Page 10: ...3 3 V supplied to Pin 1 of the DR connector JB13 14 not used JB14 15 not used JB16 17 Internal interface enable normally fitted Table 3 4 Pin functionality In addition to the configurable jumpers the...

Page 11: ...e connectors and indicators Figure 3 6 Jupiter 20 adapter board Table 3 6 lists the pin configurations for the J1 and J2 connectors Jupiter function J2 2 54 mm pitch header pin no J1 2 mm pitch header...

Page 12: ...a clear view of the sky for optimal reception of the satellite signals The 1PPS LED should begin flashing at 1 Hz once the receiver is powered and has started receiving at least one satellite This pro...

Page 13: ...ualGPS VisualGPS graphically presents the serial data transmitted by the receiver The receiver output must be enabled in the NMEA protocol for this software to be used To enable the receiver output 1...

Page 14: ...d now present information in each window similar to that of VisualGPS Whilst enabled in SiRF binary protocol more of the analysis software s functionality can be accessed To switch back into NMEA mode...

Page 15: ...normally at 0 V but rises to 3 V when the vehicle is in the reverse gear Use of this signal is optional if it is not used the effect of occasional reversing by the vehicle will not significantly degr...

Page 16: ...DUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE CONSEQUENTIAL OR INCIDENTAL DAMAGES MERCHANTABILITY OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL P...

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