User manual EMTAC BT III

[. . . ] BTGPS III GPS Receiver User Guide Copyright © EMTAC Technology Corp. All rights reserved. Reproduction, transfer, distribution or storage of part or all of the contents in this document in any form without the prior written permission of EMTAC is prohibited. The Bluetooth trademarks are owned by Bluetooth SIG, Inc. USA and licensed to EMTAC Technology Corp. [. . . ] Position offsets of hundreds of meters or much more can result from using the wrong datum. In addition to datum used, there are number of positioning errors can occur, limiting accuracy. The major errors including satellites orbiting error, poor satellites geometry, multi-path signals, atmospheric delay and receiver clock timing. The indication of GPS signal reception is described in section "Indication of BTGPS III operation" of Chapter 3. 16 Using optional external active antenna Your BTGPS III is optional equipped with an external active antenna port and/or external active antenna(optional accessory) for convenience usage when operating under certain environment situation, such inside vehicle where satellite signals are blocked. Detailed operation is described in Operation chapter. Make sure using the optional external antenna supplied by EMTAC. Use of unqualified antenna will severely degrade positioning performance or even damage the receiver. Read basic guidelines before using external active antenna accessory. *The external active antenna is an optional accessory which not included in the standard package. **External antenna port is an optional specification. CAUTION and WARNING Only use the charger supplied in with the BTGPS III. Use other charger can damage the BTGPS III and even dangerous at the risk of explosion. Do not expose BTGPS III to high temperatures higher than 60°C (140°F) such in car under direct sunshine. Expose BTGPS III to high temperatures environment can not only shorten the life of electronic devices and melt or drape certain plastics, but also can damage the battery inside the BTGPS III and even dangerous at the risk of explosion. Do not try to open or break the receiver. There is no service accessory part inside the receiver. Open the receiver will void the warranty. 17 2. General Information This chapter describes your BTGPS III in details. General features Your BTGPS III is an excellent navigation and positioning aid tool when using with mobile terminal devices("host") of Bluetooth enabled, which the host with GPS application software installed. The general features are Best mobile GPS receiver for consumer and corporate GPS receiver with Bluetooth transceiver built-in Provides fully interoperability with Bluetooth integrated mobile devices Ultra-low power consumption using four AAA-size batteries. Long operation time: 20 hours under continuous mode(1) LED lights indicate GPS status, Bluetooth connection Embedded high sensitivity GPS active antenna and Bluetooth antenna External GPS active antenna(optional) for in vehicle and indoors use Compatible with all GPS map running on various hardware platforms Navigating freely without wire connection to host mobile devices-- true wire-less In the following sections, each portion details of BTGPS III are described, see Figure 2 and 3. Portion details: Antenna Façade Power Switch External Antenna Port LED indicators Power Jack External Active Antenna (optional) (1) When use four Alkaline AAA-size batteries. 15 hrs operation when use four Ni-MH rechargeable batteries. BTGPS III can operate when using the power supply from 5V cigarette-lighter in the vehicle by plugging the DC charger into the jack of the BTGPS III. This will not charge the batteries when using rechargeable batteries. 18 A C E B D A: Antenna Facade B: Power Switch C: External Antenna Port D: LED Indicators E: Power Jack Figure 2 (Figure 2 shows BTGPS III with external antenna port option. ) 19 Antennae Facade Your BTGPS III integrated with a high sensitive 1. 5GHz GPS antenna and 2. 4GHz Bluetooth antenna internally, which can offer good satellite signal reception for position fix as well as data communication between BTGPS III and your Bluetooth host terminal, respectively. [. . . ] standards committee that defines data message structure, contents, and protocols to allow the GPS receiver to communicate with other pieces of electronic equipment aboard ships. Selective Availability (SA) Selective Availability is a process whereby the U. S. Department of Defense dithers the satellite clock and/or broadcasts erroneous orbital ephemeris data to create a pseudorange error to prevent adversaries from using the extremely accurate GPS positioning data. SPREAD SPECTRUM The received GPS signal is wide bandwidth and low power. [. . . ]