环天 GPS导航设备-ET-332说明书.pdf-资料库

Pq PRODUCT USER MANUAL GPS ENGINE BOARD ET-332 186 16 GlobalSat Technology Corporation x_M@ 16, No.186,Chien 1 Road, 235Chung Ho City,Taipei Hsien, Taiwan ,R.O.C. Tel: 886-2-8226-3799(Rep.) Fax: 886-2-8226-3899 Web: www.globalsat.com.tw E-mail: service@globalsat.com.tw (F@s )

high performance GPS Chip Set SiRF Star L1, 1575.42 MHz 1.023 MHz chip rate 20 channel all-in-view tracking -159 dBm Features: SiRF star Very high sensitivity (Tracking Sensitivity: -159 dBm) Extremely fast TTFF (Time To First Fix) at low signal level Compact size (40.5mm * 35 mm * 10mm) suitable for space-sensitive application Support NMEA 0183 and SiRF binary protocol Build-in SuperCap to reserve system data for rapid satellite acquisition. Cold start under 40 seconds, average Hot start under 1 seconds, average Specification: General Chipset Frequency C/A code Channels Sensitivity Accuracy Position Velocity Time Datum Default Acquisition Time Reacquisition Hot start Warm start Cold start Dynamic Conditions Altitude Velocity 10 meters, 2D RMS 5 meters, 2D RMS, WAAS enabled 0.1 m/s 1us synchronized to GPS time 18,000 meters (60,000 feet) max 515 meters /second (1000 knots) max 0.1 sec., average 1 sec., average 38 sec., average 42 sec., average WGS-84

Less than 4g 20m/sec **3 3.8V ~ 6.5V DC input 75mA (Continuous mode) 30mA (Trickle power mode) 4,800 to 57,600 bps adjustable SiRF binary or NMEA 0183 GGA, GSA, GSV, RMC, VTG, GLL -40J to +85J Acceleration Jerk Power Main power input Power consumption Interface Baud rate Output message Environmental Operating Temp

Physical Characteristics

Interface Connection * Pin-out of the 12-pin interface connector Pin Number Name Description GND Ground VBAT Backup Battery VDC 3.8V~5.5V DC Power Input Type Input Input 1 2 3 4 5 6 7 8 9 10 11 12 PBRES Push Button Reset Input (Active Low) Input GPIO1 TXA RXA GND GND SELECT (Reserved) Serial Data Output A (GPS Data) Output Serial Data Input A (Command) Input Ground Ground (Reserved) TIMEMARK 1PPS Time Mark Output Output Ground This is the main DC supply for a 3.8V ~ 5.5V power module board. GND Interface description * VDC (DC power input): * VBAT (Backup battery): power is removed .Typical current draw is 10uA. Without an external backup battery, the module/engine board will execute a cold star after every turn on. To achieve the This is the battery backup input that powers the SRAM and RTC when main

This pin provides an active-low reset input to the engine board. It causes the faster start-up offered by a hot or warm start, a battery backup must be connected. To maximize battery lifetime, the battery voltage should be between 2.5v and 3.6v. * PBRES (Push button reset): engine board to reset and start searching for satellites. * SELECT : * TXA : data to user’s navigation software or user written software. * RXA : board from SiRFdemo software or from user written software. connect a resistor to pull high. * Time mark : This is the main receive channel for receiving software commands to the engine Normally this pin must be kept in high, and if you don’t use this pin please Do not connect. This is the main transmits channel for outputting navigation and measurement Output TTL level , 0V ~ 2.85V This pin provides one pulse-per-second output from the engine board that is synchronized to GPS time. * GND : GND provides the ground for the engine board. Connect all grounds.

SOFTWARE COMMAND NMEA Output Command GGA-Global Positioning System Fixed Data Table B-2 contains the values for the following example: $GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,,,,0000*18 Table B-2 GGA Data Format Name Example Units Description Message ID UTC Time Latitude N/S Indicator Longitude E/W Indicator Position Fix Indicator Satellites Used HDOP MSL Altitude1 Units Geoid Separation1 Units Age of Diff. Corr. Diff. Ref. Station ID Checksum $GPGGA 161229.487 3723.2475 N 12158.3416 W 1 07 1.0 9.0 M M 0000 *18 meters meters meters meters second GGA protocol header hhmmss.sss ddmm.mmmm N=north or S=south dddmm.mmmm E=east or W=west See Table B-3 Range 0 to 12 Horizontal Dilution of Precision Null fields when DGPS is not used End of message termination SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid heights. Table B-3 Position Fix Indicator Value 0 1 2 3 Description Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode , fix valid GPS PPS Mode, fix valid

GLL-Geographic Position-Latitude/Longitude Table B-4 contains the values for the following example: $GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C Table B-4 GLL Data Format Example $GPGLL 3723.2475 n 12158.3416 W 161229.487 A *2C Units Description GLL protocol header ddmm.mmmm N=north or S=south dddmm.mmmm E=east or W=west hhmmss.sss A=data valid or V=data not valid End of message termination Name Message ID Latitude N/S Indicator Longitude E/W Indicator UTC Position Status Checksum GSA-GNSS DOP and Active Satellites Table B-5 contains the values for the following example: $GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33 Table B-5 GSA Data Format Name Message ID Mode1 Mode2 Satellite Used1 Satellite Used1 ….. Satellite Used1 PDOP HDOP VDOP Checksum Example $GPGSA A 3 07 02 1.8 1.0 1.5 *33 Units Description GSA protocol header See Table B-6 See Table B-7 Sv on Channel 1 Sv on Channel 2 Sv on Channel 12 Position dilution of Precision Horizontal dilution of Precision Vertical dilution of Precision End of message termination Satellite used in solution. 1. Table B-6 Mode1 Value M A Description Manual-forced to operate in 2D or 3D mode 2Dautomatic-allowed to automatically switch 2D/3D Table B-7 Mode 2 Value 1 2 3 Description Fix Not Available 2D 3D

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环天 GPS导航设备-ET-332说明书.pdf

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