LA000504D © 2006 Navman New Zealand. All rights reserved. Proprietary information and specifications subject to change without notice.
2.2 Major components of the Jupiter 110
Antenna
: The antenna receives the GPS signals.
LNA (Low Noise Amplifier):
This amplifies 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 filter (1.575 GHz):
This filters the GPS signal and removes unwanted signals caused by
external influences that would corrupt the operation of the receiver.
RFIC (Radio Frequency Integrated Circuit):
The RFIC (SiRFstar
II
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 SiRFstar
II
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 fleet 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 flip-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 specification
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: –40
º
C
to +85º
C
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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