User manual HOLUX GM-83

[. . . ] Software Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4. 1 NMEA Transmitted Sentences 4. 2 RTCM Received Data 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Earth Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5. 1 Earth Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The GM-83 utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or the orbital data is obsolete, it may take more time to achieve a navigation solution. The GM-83 Auto-locate feature is capable of automatically determining a navigation solution without intervention from the host system. However, acquisition performance can be improved as the host system initializes the GM-83 in the following situation: Moving further than 500 kilometers. Failure of Data storage due to the inactive internal memory battery. 4 GM-83 User's manual 2. 2 Navigation After the acquisition process is complete, the GM-83 sends valid navigation information over output channels. These data include: 1) 2) 3) 4) 5) Latitude/longitude/altitude Velocity Date/time Error estimates Satellite and receiver status 2. 3 Manufacturing Default: Datum: WGS84. Output: GGA, GSA, GSV, RMC or by demand. DGPS: RTCM SC-104(Type 1, 2, 9) or WAAS (in USA area) or EGNOS (in European area) 5 GM-83 User's manual 3. Hardware interface 3. 1 Standard Model GM-83 GM-83-A W/ angle MCX connector and standard hole to hole dimension Pin # 1 2 3 4 5 6 7 8 9 10 Name NC VCC_5V VBAT NC PBRESEN GPIO1 GPIO2 GPIO3 GPIO4 GND J1 connector pin definition: Description No function Regulated 5. 0V +/-5% input power, 160mA typical. No function Manual reset input, ground to reset receiver. The minimum plus width is 150 ms reset signal. General purpose I/O pin 1 General purpose I/O pin 2 General purpose I/O pin 3 General purpose I/O pin 4 Ground 6 GM-83 User's manual 11 12 13 14 15 16 17 18 19 20 TXA RXA GND TXB RXB GND GPIO5 GND TIMEMARK NC Port A Serial Transmit Data GPS messages. Port A Serial Receive Data GPS commands. Port B Serial Receive Data DGPS messages. Ground 1PPS Time mark output No function 1. Dual communication channel TTL levels (GM-83-T0/T1) or RS-232 levels (GM-83-A0/A1), with user selectable baud rates (4800-Default, 9600, 19200, 38400). This input is used to receive software commands to the GM-83 from user written software. This input is used to receive serial differential GPS data. This output provides navigation data to user written software. TXB: For user's application (not currently used). PBRESEN: This pin provides an active-low reset input to the GM-83. [. . . ] GGA, GSA, GSV, RMC or by demand. 5. 2. 1 Setting Syntax Datum change syntax: >DOS\Sirfprog /Fdataxx. dat ­Px ­Bx ­Csh1 -Px: x is com port, 1= COM1 2 = COM2 -Bx: Baud rate, 4800, 9600, 19200 or 38400 Example: Change Datum to WGS84, Sirfprog /Fdata58. dat ­P1 ­B4800 ­Csh1 <Entry> After change datum, the new datum will keep in SRAM. If long time (more than 20 days) no power supplied to GM-83, user must resend datum to GM-83 when power on. 5. 2. 2 Addition Software SiRFdemo is the Evaluation Receiver configuration and monitoring software provided with the GM-83. This software can be used to monitor real-time operation of the GM-83 Receiver, log data for analysis, upload new software to the Receiver, and configure the Receiver operation. See setup. pdf for more information on the use and operation of SiRFdemo software. [. . . ]