Table 3-5 Signals available on the test points ...................................................................12
Table 3-6 Connections J1 (2 mm pitch header) and J2 (2.54 mm pitch header) ..............13
1.0 Introduction
(1)
(2)
(3)
(4)
(5)
(6)
software and documentation
Serial Port 1
Antenna
DR
Clock
Out
Serial Port 2
-
+
DC Power
9-16Volts
This document provides detailed guidelines for the operation and conguration of the Jupiter
30 GPS Module Development Kit. The AA003029 series of development kits assist in the
integration of the Jupiter 30 in a customer’s application, offering a simple and easy to use
platform for evaluation purposes.
It is recommended that the user pays particular attention to the conguration settings outlined
in section 3.0 prior to applying power and operating the development unit. For example, it is
important to understand and recognise the main functional switches and connector locations
accessible on the development unit’s front and rear panels. Following this information, simple
step-by-step guidelines are presented to ensure successful setup of the development unit.
In addition to hardware, the GPS Development Kit is supplied with SiRFDemo and SiRFash
analysis software to allow communication with the Jupiter 30 GPS receiver through a serial port.
The Windows based software presents the receiver’s raw data in a geographical form, allowing
both detailed analysis and evaluation for both NMEA and SiRF Binary formats.
2.0 Equipment
This section provides a brief overview of the equipment included in the Jupiter 30 GPS
Development Kit.
2.1 Equipment supplied
This kit should contain the items illustrated in Figure 2-1.
1. Jupiter 30 GPS development unit
The Jupiter 30 GPS receiver development unit includes all of the following hardware to allow
thorough evaluation:
• Dual RS232 level serial data I/O ports
• Selectable bias voltages for active GPS antennas
• Backup power source 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 30 module
• Status indication through four LEDs on front panel
• Congurable functionality using a DIP switch accessed through the front panel
Figure 2-1 Equipment supplied in the Jupiter 30 GPS Development Kit
Note: before supplying power to the development unit, please review the conguration settings and
operation described in this document for optimum performance of the Jupiter 30 GPS receiver.
2. GPS antenna with pre-amp, magnetic base and SMA connector
1 2 3 4 5 6 7 8
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Serial Port 1
Antenna
DR
Clock
Out
Serial Port 2
-
+
DC Power
9-16Volts
A magnetic-mount active antenna is supplied with the receiver development kit, along with an
RF cable (RG-316) already terminated with the proper connector for the development unit. The
nominal measured attenuation of the cable with connectors is approximately 5 dB. The supplied
active antenna should be biased at +3 VDC, but a different active antenna with a bias of either
+3, +5 or +12 VDC may be used. Refer to section 3.2 to ensure that the conguration switches
on the front panel of the development unit are chosen to select the appropriate bias voltage.
Caution: ensure antenna power switches are properly set before connecting the antenna. An
antenna designed for +3 VDC operation will be damaged if connected to a +12 VDC
source.
3. Serial interface cable
A serial cable is provided to interface between the development unit and the customer’s PC, or
between the development unit and a DGPS receiver. This cable is terminated at both ends with
female connectors to match the male connectors on the development unit and the PC. If the PC
used only supports a USB port, an RS232/USB converter could be utilised.
4. Power adapter for 240/120 VAC operation
DC power for the development unit is provided by either an AC/DC converter or automobile
adapter. The AC/DC converter operates from a nominal 120/240 VAC input and provides a
12 VDC at 500 mA out.
5. Power adapter for 12 VDC vehicle operation
For mobile operation, an automotive adapter intended for use in 12 VDC vehicles is provided.
reset
SMA
antenna
dead
reckoning
DC input
1PPS
power
‘U’ slot for
conguration
antenna
comm 1
NMEA &
function
comm 2
(RTCM)
Figure 3-1 Front and back panels of the Jupiter 30 development unit
(showing functional switches and connector locations)
The CD contains the Jupiter 30 GPS receiver data sheet, PC Analysis software (SiRFDemo and
SiRFash), and other information on how to use GPS receivers.
2.2 Equipment required
The following equipment is also required to evaluate the Jupiter 30 receiver.
• IBM compatible PC
• Minimum one serial port (If your PC only has USB, a USB/RS232 converter can be
employed)
• Windows 95/98, WinNT4.0 or higher
• 486 100MHz or higher
• SVGA at least 800x600 resolution
• 16 Megabytes of RAM
• 6 Megabytes (min) of disk space
3.0 Technical conguration
This section provides a detailed description of all the technical aspects and congurable
functionality of the Jupiter 30 GPS development unit.
3.1 Overview
Figure 3-1 illustrates the connectors, switches and LEDs available on the development unit.
3.1.1 Power switch (On/Off)
The switch on the front panel controls primary power to the Jupiter 30 receiver module inside.
The power status LED (see section 3.3) indicates the state of the unit: if lit, the module has
primary power supplied. If the conguration DIP switch 5 is on and Jumper JB5/6 linked, the
module’s secondary supply SRAM and RTC will continue to be powered when the power switch
is off. Only the removal of the DC power input at the rear 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 30 will have a ‘hot start’ capability when primary
power is re-applied within 4 hours, and a ‘warm start’ thereafter, by maintaining last position,
current time and satellite ephemerides.
3.1.2 Conguration DIP switch
The conguration DIP switch on the front panel provides the ability to congure the Jupiter
30 module, offering exibility depending on the specic application. Refer to section 3.2 for a
description of the functionality of each individual switch, including the typical settings when using
the Jupiter 30 module.
3.1.3 Function LEDs
The four LEDs on the front panel provide an indication of the current status of basic features
associated with the development unit. Refer to section 3.3 for a complete description of the
function of each LED.
3.1.4 Reset switch
A reset push button is provided on the front panel to generate a receiver system hardware reset.
3.1.5 Clock out connector
The Clock out connector, located on the rear panel of the development unit, can be used to
provide module generated timing signals. Refer to section 3.4 for more detailed information.
3.1.6 Serial port 1
This host serial port is used to send and receive serial data. This port is used as the default, with
transmission in NMEA format at the rate of 9600 Baud. The connectors to be used with these
This is the auxiliary serial port, and primarily used for the reception of RTCM SC-104 DGPS
(Differential GPS) correction messages.
3.1.9 Antenna connector
The antenna provided with this development kit should be connected to the SMA connector
located on the rear panel of the development unit.
3.1.10 DC power input
The supplied DC power adapter is to be plugged into the DC connector on the rear panel of
development unit. The development unit will accept voltages from 9 to 16 VDC. The middle pin
on J1 is negative polarity, while the outer shell is positive.
3.2 Conguration DIP switch
A typical setting of the Conguration DIP switch is shown in Figure 3-2.
1 2 3 4 5 6 7 8
ON
OFF
Figure 3-2 Conguration DIP switch
Table 3-1 outlines the available functionality and corresponding switch position for the
Conguration DIP switch.
SwitchDescriptionTypical setting
1GPIO3/GYROIN*OFF (high)
2GPIO15/FR*OFF (high)
3Serial BOOTOFF (normal run)
4GPIO1/W_TICKS*OFF (high)
5RTC BACKUP POWERON (enabled)
6PREAMP power selectOFF (3 V)
7PREAMP power selectOFF (12 V)
8PREAMP power enableON (enabled)
* These functions have been disabled by internal switch
SW3 to allow correct operation of the antenna current sense
circuits on the Jupiter 30 adapter board.
Table 3-1 DIP switch settings
A brief description of the functionality of each switch is specied below. Refer to the Jupiter 30
Data sheet for more information about the functionality of specic pads. The receiver
operating settings will not change after moving the position of a conguration switch while the
development unit is operating. Pressing the reset switch, or turning the unit off and on will enable
the settings to take effect in the receiver. The recommended method for reconguration is to
switch the unit off, modify the switch positions, then re-apply the power.
3.2.1 DIP switch 1 – GPIO3 /GYROIN input
DIP switch 1 interfaces with the GPIO3 /GYROIN pad of the module. The switch is typically
off, but has no effect with the standard module’s software. This switch can be enabled by the
internal switch SW3.1.
3.2.2 DIP switch 2 – GPIO15 /FR input
DIP switch 2 interfaces with the GPIO15 /FR pad of the module. The switch is typically off, but
has no effect with the standard module’s software. This switch can be enabled by the internal
switch SW3.2.
DIP switch 3 interfaces with the BOOT pad of the module and allows the user to upgrade the
Flash memory. For normal operation the switch should be set to off. To boot from the serial port
the switch should be set to on. This switch is enabled by the internal switch SW3.3.
3.2.4 DIP switch 4 – GPIO1/W_TICKS input
DIP switch 4 interfaces to the GPIO1/W_TICKS pad of the module. The switch is typically
off, but has no effect with the standard module’s software. This switch can be enabled by the
internal switch SW3.4.
3.2.5 DIP switch 5 – RTC backup power enable
DIP switch 5 provides control of the RTC backup power to the module. When set to the on
position, the RTC backup power is applied to the module, allowing the RTC and SRAM to
continue being powered when the primary source is removed. The jumper JB5/6 must also be
in place for the backup power to be supplied. This power supply will be supplied to the module
even with the main power switch in the off position.
3.2.6 DIP switch 6 – Antenna preamp power select (3.3 V or 5/12 V)
Dip switch 6 provides control of the antenna preamp voltage applied to the module. The switch
position determines the supply voltage (off = 3.3 V, on = 5/12 V). Switch 6 should be left in the
3.3 V (off) position. The positions 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 controls the antenna preamp voltage applied to the module. If switch 6 is
on, then switch 7 will determine the supply voltage to the active antenna (off = 12 V, on = 5 V).
Switch 7 is not operational when switch 6 is in the 3.3 V (off) position.
3.2.8 DIP switch 8 – Antenna preamp power enable
DIP switch 8 provides the ability to enable/disable the antenna preamp voltage to the module
depending on the antenna being used. Typically this switch is on, enabling 3 V to be applied to
the active antenna supplied with the kit.
serial p ort 1
timing c onnector
JB13/14/15
test points E1 to E9
JB16/17
SW3
all off exc ept SW3. 3
JB10/11/12
voltage select ion
switch (3.3V or 5V )
JB1/2
JB3/4
DC power
serial p ort 2
DR connector
ON/OF F switchc ongu ration D IP
switch
function LEDSJB5/6reset switch
Figure 3-5 Internal layout of the development unit
There are four LEDs on the front panel of the development unit, indicating the status of a
selection of basic functions. The functions of the LEDs are described in the sections that follow.
1PPS Power AUX GPIO
Figure 3-3 Function LEDs on front panel
Note that some early versions of the evaluation unit have different LED legends.
3.3.1 1PPS
This LED will ash on with each transition of the 1 PPS (Pulse Per Second) output of the GPS
receiver. The 1PPS LED will begin ashing when the receiver is tracking a satellite.
3.3.2 Power
This LED indicates presence of primary DC power to the module.
3.3.3 AUX
This LED shows activity on the auxiliary serial RS232 port (DGPS).
3.3.4 GPIO
This LED indicates the state of GPIO15 , which can be set via DIP switch 2. This LED is lit when
switch 2 is set to on. (Note that switch 2 has no effect when using standard Jupiter 30 software.)
3.4 Clock out connector
The Clock out connector provides an interface for all associated timing signals with the module.
It provides the user access to the Time Mark (1PPS) signal. The pinout connections are
described in Table 3-2, and illustrated in Figure 3-4.
Pin numberFunction
1not used
2inverted 1PPS signal
3normal 1PPS signal
4ground
Table 3-2 Pin functions of the clock out connector
A mating connector for the clock out connector is supplied with the development kit. The part
number is shown in Table 3-3.
ManufacturerPart number
Molex70400 series ‘G’
Table 3-3 Mating connector part description
3.5 Internal conguration
It should not be necessary to open the development unit unless accessing the internal test pins.
Most combinations of I/O can be made from the front panel conguration switch. In the event
that it is necessary to open the unit, Figure 3-5 illustrates the internal layout of the development
unit board.
As shown in Figure 3-5, there is a selection of links that can be congured to provide
functionality depending on the application. Table 3-4 lists the functions available.
In addition to the congurable jumpers, there is a selection of test points on the board. The
signals available on the test points are shown in Table 3-5.
Test pointFunction
E1TXA
E2RXA
E3TXB
E4RXB
E61PPS
E7not used
E8ground
E9ground
Table 3-5 Signals available on the test points
There are some settings that should not be changed when using the standard Jupiter 30 module
in conjunction with the development unit. These are as follows:
3. Connect the DB9 serial data cable between the PC serial communication port and the
development unit’s Serial Port 1.
4. Place the antenna in a site where a good view of the sky can be seen (refer to section 4.2 for
more detail).
5. Run the GPS analyser software on the PC. (Refer to section 4.4 for more details.)
6. Connect the power supply to a suitable AC outlet.
7. Turn the unit on using the power switch on the front panel to provide primary power to the
Jupiter 30 receiver. Once power is applied, the Power LED should be lit.
4.2 Positioning the GPS antenna
The GPS antenna should be located with a clear view of the sky for optimal reception of the
satellite signals. The 1PPS LED should begin ashing at 1 Hz once the receiver is powered
and has started receiving at least one satellite. This provides an indication of whether or not the
receiver is running.
Note: GPS signals may be severely attenuated or totally obscured by roofs, solid walls, dense
foliage, or even coated glass (found in many ofce structures and car windows). The
development unit should be outside, or on the roof of a building to effectively evaluate
receiver performance. With stationary developments, care should be taken to keep the
antenna away from the side of a building as GPS signals can reect off metal or coated
glass. These reections have a longer path than direct signals and can cause multi-path
errors.
4.3 Connecting an RTCM differential source
For debugging purposes, it is suggested that users log both the GPS and RTCM data
simultaneously. To allow the provision to do this, Navman can supply a software program called
Labmon.
The development unit, PC and the RTCM SC-104 differential correction source are connected
as shown in Figure 4.1. If RTCM SC-104 data needs to be logged at the same time it is sent
to the receiver, the OEM must supply a cable with three connectors to connect the RTCM
correction source to the development unit’s auxiliary port and to an unused serial port on the
PC. In this case, data is only logged when Labmon is invoked with le names as command line
arguments (refer to the Labmon application note LA010103). Logging and subsequent review of
the RTCM correction data often resolves performance or compatibility issues.
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.
There are two software packages supplied with the GPS Development Kit: SiRFDemo and
SiRFash. 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.
To set the receiver output to SiRF binary
1. Open the SiRFDemo software.
2. When the Data Source setup is displayed, select the appropriate COM port and 9600 Baud
from the drop down menu.
3. Select the Action menu and click on Open Data Source. If the development unit is powered,
and the serial port is connected to the PC, NMEA data should appear in the Debug View
window.
To change to SiRF binary, select the Action menu and click on the Switch to SiRF Protocol. This
should 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, select the Action menu and click on Switch to NMEA Protocol. Select
9600 for the baud rate and click on the Send button.
Note: settings, including the current output protocol, are reset if all power is removed from the
unit. For more information, refer to the Navman SiRFDemo and SiRFash User Guide
MN000316.
5.0 Acronyms used in this document
1PPS: One Pulse Per Second
DGPS: Differential Global Positioning System
GPIO: General Purpose Input Output
GPS: Global Positioning System
NMEA: National Marine Electronics Association
RTC: Real Time Clock
RTCM: Radio Technical Commission for Maritime services
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