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LA000577C © 2006 Navman New Zealand. All rights reserved. Proprietary information and specications subject to change without notice.
4
1.0 Introduction
The Navman Jupiter 30 and Jupiter 20 series of GPS receiver modules are complete GPS
receivers designed for surface mount assembly (SMT) integration. The modules provide a
simple, cost effective GPS solution for application designers. Application integration will vary
primarily with respect to antenna system design and EMI protective circuitry.
The Jupiter 30 is the successor to the established Jupiter 20, sharing the same form factor
(25.4 x 25.4 mm) and electrical compatibility. This provides a low risk migration path for existing
users, offering greater sensitivity, lower power consumption and a faster x.
Fundamental operation requires a 3.3 VDC power supply, approximate current of 80 mA
(Jupiter 30) or 100 mA (Jupiter 20), GPS antenna system interface, relevant EMI protection, and
the design and layout of a custom PCB.
This document outlines the following design considerations and provides recommended
solutions:
Hardware application information
This section introduces the system interface and provides the following physical specications:
a. electrical connections (SMT pad interface)
b. mounting (PCB pad layout dimensions)
c. manufacturing recommendations
d. application circuit interface
It also discusses the fundamental considerations when designing for RF, and presents the
antenna system design overview. This covers the following topics:
a. PCB layout
b. antenna system design choices
Software application information
This section provides answers to some common questions that may not have been covered in
the above topics.
A sample solution is presented and discussed for example purposes only. Due to the nature and
complexity of GPS signals, it is recommended that application integrators adhere to the design
considerations and criteria described in this document.
2.0 Hardware application information
The modules provide 30 Surface Mount pads for electrical connections. The sections that follow
introduce the physical and relative functional specications for application integration.
Note: The electrical connections can carry very low level GPS signals at 1.57542 GHz. The
layout must be designed appropriately with consideration of the frequencies involved.
2.1 Electrical connections (SMT pad interface)
Details of the module connector conguration are shown in Table 2-1.