|
|
AV SYSTEM AV-351 < SYSTEM DESCRIPTION > [NAVIGATION WITH BOSE] C D E F G H I J K L M B A O P • Map-matching does not function correctly when road on which the vehicle is driving is new, etc. and not recorded in the map data. Also, map-matching does not function correctly when road pattern stored in the map data and the actual road pattern are different due to repair, etc. Therefore, the map-matching function judges other road as a cur- rently driving road if the road is not in the map, and displays the current location mark on it. Later, the current location mark may be repositioned to the road if the correct road is detected. • Effective range for comparing the vehicle position and travel direc- tion calculated by the distance and direction with the road data is limited. Therefore, correction by map-matching is not possible when there is an excessive gap between current vehicle position and the position on the map. GPS (Global Positioning System) GPS (Global Positioning System) is developed for and is controlled by the US Department of Defense. The system utilizes GPS satel- lites (NAVSTAR), transmitting out radio waves while flying on an orbit around the earth at an altitude of approximately 21,000 km (13,049 mile). The receiver calculates the travel position in three dimensions (lati- tude/longitude/altitude) according to the time lag of the radio waves that four or more GPS satellites transmit (three-dimensional position- ing). The GPS receiver calculates the travel position in two dimen- sions (latitude/longitude) with the previous altitude data if the GPS receiver receives only three radio waves (two-dimensional position- ing). GPS position correction is not performed while stopping the vehicle. Accuracy of the GPS will deteriorate under the following conditions: • In two-dimensional positioning, GPS accuracy will deteriorate when altitude of the vehicle position changes. • The position of GPS satellite affects GPS detection precision. The position detection may not be precisely performed. • The position detection is not performed if GPS receiver does not receive radio waves from GPS satellites. (Inside a tunnel, parking in a building, under an elevated highway etc.) GPS receiver may not receive radio waves from GPS satellites if any object is placed on the GPS antenna. NOTE: • The detection result has an error of approximately 10 m (32.81 ft) even with a high-precision three dimen- sional positioning. • There may be cases when the accuracy is lowered and radio waves are stopped intentionally because the GPS satellite signal is controlled by the US trace control center. BLUETOOTH ® HANDS-FREE PHONE FUNCTION • When the cellular phone is connected to the AV control unit in Bluetooth ® communication, hands-free phone communication can be performed. • Simply operating the steering switch without releasing hands from the steering wheel allows the driver to make a phone call or receive a phone call. • For the available cellular phone support model, refer to "Compliant model list" on the CARWINGS site. ® communication compliant phone is registered to the AV control unit, hands-free phone communication can be performed. Five units of Bluetooth ® communication devices including audio devices and cellular phones can be registered to the AV control unit. • The content of the memory (telephone book) of the cellular phone can be recorded in the AV control unit. Bluetooth ® compliant profile VOICE RECOGNITION FUNCTION JSNIA0180GB SEL526V Profile name Abbreviation Version Hands-Free Profile HFP 1.5 Dial-Up Networking Profile DUN 1.1 Object Push Profile OPP 1.1 |