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Audiovox is known for its first vehicle-installed wireless telephones and car stereos, has now forayed into consumer electronics a part of which is car navigation system.

The aim of car navigation system is to guide a vehicle to a destination set even if you do not know a map to the destination. A car navigation system provides you with guidance on the direction to proceed by voice instructions or screen display when the vehicle approaches an intersection. Normally, these GPS receivers display a map of a desired area for you to refer while driving or planning a route.

The Audiovox NPC5400 is a CD-Rom Based Full Color Navigation System Computer with Real Time Traffic Software IR Wireless Remote and Full Coverage Map Set. Features include Scrolling Map or Moving Vehicle Display Full Screen Map or Pictogram (Turn by Turn) Split Screen Display with Map and Pictogram.

The NVX406 is the flagship model, comes with a 3.5″ Color LCD display screen, 4GB hard drive and basic MP3/PMP and PDA functions. It also is XM ready. It has a Rechargeable Li-Ion battery with reportedly a 3 to 4 hr operation time.

Features include Voice Guidance in addition to Visual Guidance. Zip Code Entry Map Input, Latitude Longitude 8 Route Choices (Fastest Shortest etc.), 9 Languages 21 Voices both Male and Female. Trip Computer (Average Speed Elapsed Distance Time) Speed Dependant Volume Control (On Off Selectable), Wireless Remote with Wired Cradle Speaker. Interface Adapter for Driver’s Door Speaker Monitor available separately. This model is suitable for use with Audiovox LCD monitors like LCM5N LCM58N LCM580NAV LCM7N CMRMVPKG2 LCMR4N.

Other features of this top end model includes 1.6 million points of interest PMP functions & enhanced PDA functionsCNP1000 Interface for optional XM antenna Dashboard/Windshield mounting kit and carrying case, Voice Navigation Instructions, United States and Canada Mapping. Built-in Devices like Audio Player Video Player – MPEG4.

Navigational data such as position and velocity are used to locate automobiles by these Audiovox GPS receivers. This data is communicated to them by earth-orbiting satellites which send low power radio signals called L1 and L2. The geodetic coordinates of a GPS receiver are determined using known trilateration techniques which analyze signals transmitted from two or more satellites to the receiver.

The Audiovox GPS receiver depends on a receiving unit to receive satellite-based navigation signals and a computer unit which forwards the signal and data received for further processing to be used for navigation. An interface is used, normally, to connect a receiver with a navigation computer.

For accurate calculation of the receiver’s precise latitude, longitude, and altitude, the GPS receiver, no matter where, on earth, it is located, and which has an unobstructed view of the sky, locks with at least four satellites. Thus, at least four satellites come into play in helping the GPS receiver to calculate the user’s latitude, longitude and altitude positions (known as 3D position). Other details such as speed, distance, distance to destination, track, trip, sunrise and sunset time are also calculated by the receiver using the 3D position.

Reception equipment, antennas and processors are component parts of this GPS receiver. It uses the processors to determine the position and timing based on the range of satellites it locks with.

Audiovox NVX406 comes with one year warranty.

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Source by Richard Runion