User manual UNI-T DT 838

[. . . ] LED off ---- Battery is partially full or fully charged. 2. 4 Power-saving Function When you start the power of the Bluetooth GPS Receiver DT 838, if the Bluetooth is not connected to any devices within 10 minutes, DT 838 will turn off the power automatically, and all the LED will go off simultaneously. 3 3. Specification 3. 1 System Specification GPS standard GPS Antenna Bluetooth standard Operation range Bluetooth Default PIN Operation time Charge time Auto Shut-Off Battery Charging POWER BUTTON Power On Power Off Perform reset STATUS LED'S GPS status Flashing ­ GPS position is fixed Steady ­ GPS position is not fixed Power status Solid Red ­ Battery Low Solid Amber ­ Battery is being charged Bluetooth status Flashing (Slow) ­ Not connected to a Bluetooth device Flashing (Fast) ­ Connected to a Bluetooth device TEMPERATURE Operating Storage Humidity POWER DC supplies BATTERY Battery Cell Type MECHANICAL Dimension 82. 0 mm x 41. 0 mm x 13. 4 mm Lithium ­ion Rechargeable Battery 4. 5V~5. 5V / 0. 5A -10°C ~ 60°C (14°F ~ 140°F) -20°C ~ 70°C (-4°F ~ 158°F) Operational up to 95% non-condensing Pressing the Power button for approximately 1 second will cause the unit to turn ON Pressing the Power button for approximately 1 second will cause the unit to turn OFF Pressing the ON-OFF button for approximately 5 seconds will cause the unit to reset itself. SiRF Star Built-in ceramic patch antenna Bluetooth V2. 0 10 meters (33 feet) 0000 Up to 11 hrs 4~5 hrs When no active Bluetooth connection has been detected within 10 minutes. Mini USB connector (not for data) Electrical Characteristics 4 3. 2 GPS Specification GPS Chipset Frequency C/A Code Channels SiRF Star III L1, 1575. 42 MHz 1. 023 MHz chip rate 20 channel all-in-view tracking Electrical Characteristics ACCURACY Position Horizontal 10 meters, 2D RMS 1-5 meters 2D RMS, WAAS corrected Velocity Time DATUM Datum ACQUISITION RATE Hot start Warm start Cold start Reacquisition PROTOCOL GPS Protocol GPS Output format DYNAMIC CONDITION Acceleration Limit Altitude Limit Velocity Limit Jerk Limit Less than 4g 18, 000 meters (60, 000 feet) max. [. . . ] 20 m/sec**3 Default: NMEA 0183 (Secondary: SiRF binary) GGA(1sec), GSA(1sec), GSV(5sec), RMC(1sec), GLL, VTG is optional 1 sec. , average 38 sec. , average 42 sec. , average 0. 1 sec. average Default: WGS-84 0. 1m/sec 1 micro-second synchronized to GPS time 3. 3 Bluetooth Specification Bluetooth Chipset Frequency Standard Bluetooth Profile Operation Range Output Power CSR BC4 2402MHz to 2480MHz Bluetooth V2. 0 SPP (Serial Port Profile) 10 meters (33 feet) 0 dBm (class II) Electrical Characteristics 5 4. Please refer to the user manual of PDA to enable the Bluetooth of PDA connecting to the DT 838. Some PDAs may need the Bluetooth passkey, the passkey is "0000". Check the number of COM port used by Bluetooth. Run the suitable mapping/navigation software and select the correct COM port & baud rate: 38400 4. 2. For PDA with Bluetooth Compact Flash card 1. Please refer to the user manual of Bluetooth Compact Flash card to enable it to connect with the DT 838. Some Bluetooth devices may need the Bluetooth passkey, the passkey is "0000". Check the number of COM port used by Bluetooth. (Example COM 6). Running the suitable mapping/navigation software and select the correct COM port & baud rate: 38400. Globalsat GPS receivers provide standard NMEA data for mapping software to use and convert to coordinates and should work well with most any NMEA compliant software on the market today. The USB GPS is WAAS/EGNOS capable, and for units sold in North America through authorized resellers, these units are WAAS/EGNOS enabled unless otherwise stated. Accuracy can be up to 5 meters 2D RMS with WAAS enabled and 10-15 meters 2D RMS WAAS disabled 9 What is ideal GPS environment?The GPS requires an open, clear view of the sky. Buildings, covered parking areas, tunnels and dense foliage can cause the GPS receiver to be unable to get a location fix. If you are parked in a covered parking lot or near a tall building, it is recommended that you drive away until you have a clear view of the sky before using the GPS receiver. You may need to give the GPS a few minutes to find or get a fix its location. If your PC is on and the COM port was configured properly, the GPS receiver is on and receiving the streaming GPS data. This can be verified by opening your mapping software program. In addition, the Globalsat GPS has a built-in LED status indicator that shows the following: LED OFF: GPS receiver is off (no power). LED ON (solid): No fix, searching for GPS signals. [. . . ] LED ON (solid): No fix, searching for GPS signals. LED FLASHING: Position fix established and GPS signals are being received. Why does the GPS not work near buildings and other tall objects?The GPS uses satellites in the space to find out where it is. [. . . ]