Table of Contents
Advertisement
1.0 Introduction
The Jupiter 20 GPS receiver module is a very small surface mount receiver that is intended
as a component for OEM (Original Equipment Manufacturer) products. The module provides
a 12‑channel receiver that continuously tracks all satellites in view and provides accurate
positioning data.
2.0 Technical description
The highly integrated digital receiver incorporates and enhances the established technology
of the SiRFstarIIe/LP chipset. It is designed to meet the needs of the most demanding
applications, such as vehicle tracking in dense urban environments. The interface configuration
allows incorporation into many existing devices and legacy designs.
The Jupiter 20 receiver decodes and processes signals from all visible GPS satellites. These
satellites, in various orbits around the Earth, broadcast RF (radio frequency) ranging codes,
timing information, and navigation data messages. The receiver uses all available signals to
produce a highly accurate navigation solution. The 12‑channel architecture provides rapid TTFF
(Time To First Fix) under all start‑up conditions. Acquisition is guaranteed under all initialisation
conditions as long as visible satellites are not obscured.
The Jupiter 20 is available in three configurations:
• Jupiter 20 (standard) – GSW2.3 navigation software
• Jupiter 20S (high sensitivity) – with XTrac navigation software
• Jupiter 20D (Dead Reckoning) – with SiRFDRive software and gyro interface
Protocols supported are selected NMEA (National Marine Electronics Association) data
messages and SiRF binary.
2.1 Product applications
The module is designed for high performance and maximum flexibility in a wide range of OEM
configurations including hand‑helds, sensors, and in‑vehicle automotive products.
2.2 Receiver architecture
The functional architecture of the Jupiter 20 receiver is shown in Figure 2‑1.
Module architecture
active or passive antenna
bias T
bandpass
LNA
filter
V_ANT
input
LA000507G © 2006 Navman New Zealand. All rights reserved. Proprietary information and specifications subject to change without notice.
controls/
TCXO
RFIC
RFIN
RTC crystal
2.8 V
regulator
ORing
PWRIN
circuit
VBATT
Figure 2-1: Jupiter 20 module architecture
DR Modules only
GYRO IN
PWRIN
ADC
UART
ports
GPIO
baseband
processor
1.8 V
regulator
AD [0‑18]
PWRIN
brown out
detector
forward/
wheel
ticks
reverse
D [0‑15]
CTRL
Flash memory
Advertisement
Table of Contents
