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LA000577C © 2006 Navman New Zealand. All rights reserved. Proprietary information and specications subject to change without notice.
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4.0 Glossary and acronyms
EMI: Electromagnetic Interference
FR4 substrate: Flame Retardant type 4
The usual base material from which plated-through-hole and multi-layer printed circuit boards
are constructed. The type ‘4’ indicates woven glass reinforced epoxy resin.
GPS: Global Positioning System
A space-based radio positioning system that provides accurate position, velocity, and time data.
NMEA: National Marine Electronics Association
RF: Radio Frequency
SRAM: Static Random Access Memory
TTFF: Time-To-First-Fix
The actual time required by a GPS receiver to achieve a position solution. This specication
will vary with the operating state of the receiver, the length of time since the last position x, the
location of the last position x, and the specic receiver design.
© 2006 Navman New Zealand. All Rights Reserved.
SiRF and SiRF logo are registered trademarks of SiRF Technology, Inc. SiRFstar, SiRFLoc, Push-to-Fix, and Trickle-
Power are trademarks of SiRF Technology, Inc. All other trademarks mentioned in this document are property of their
respective owners.
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