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ET-312
Version 1.4
GPS Engine Board ET-312
Version 1.4
01/20/2010
Globalsat Technology Corporation Headquarters (Far East Century Park)
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
E-mail :
service@globalsat.com.tw
Website:
www.globalsat.com.tw
Page 1 of 21
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Summary of Contents for Globalsat ET-312
- Page 1 ET-312 Version 1.4 GPS Engine Board ET-312 Version 1.4 01/20/2010 Globalsat Technology Corporation Headquarters (Far East Century Park) 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 E-mail : service@globalsat.com.tw Website: www.globalsat.com.tw Page 1 of 21...
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Page 2: Product Information
Product Name: ET-312 Product Description: ET-312 is a compact, high performance, and low power consumption GPS engine board. It uses SiRF Star III chipset which can track up to 20 satellites at a time and perform fast TTFF in weak signal environments. - Page 3 Acquisition: 60mA Tracking: 42mA Environmental Range Humidity Range 5% to 95% non-condensing -30℃ to 85℃ Operation Temperature -40℃ to 85℃ Storage Temperature The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 3 of 21...
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Page 4: Technical Information
To achieve the faster start-up offered by a hot or warm start, a battery backup must be connected. The battery voltage should be between 2.0v and The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 4 of 21... - Page 5 This is the main receive channel for receiving software commands to the engine board from SiRFdemo software or from user written software. Ground. Ground. The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 5 of 21...
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Page 6: Application Circuit
Axial Ratio: 3 dB Typical output Impedance: 50Ω Polarization: RHCP Amplifier Gain :18~22dB Typical Output VSWR: 2.0 Max. Noise Figure: 2.0 dB Max The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 6 of 21... - Page 7 ET-312 Version 1.4 Dimensions The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 7 of 21...
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Page 8: Recommend Layout Pad
ET-312 Version 1.4 Recommend Layout PAD The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 8 of 21... -
Page 9: Recommended Reflow Profile
200 should be 30±10 Seconds. Temperature [℃] 240℃ Max. 10±1s 235±5℃. 200℃ 150±10℃ 30±10s 90±30s Time [sec.] The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 9 of 21... -
Page 10: Gll-Geographic Position-Latitude/Longitude
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 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 10 of 21... - Page 11 Table B-7 Mode 2 Value Description Fix Not Available GSV-GNSS Satellites in View Table B-8 contains the values for the following example: The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 11 of 21...
- Page 12 <CR><LF> End of message termination SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS48 directions. The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 12 of 21...
- Page 13 0=SiRF Binary, 1=NMEA, 4=USER1 <baud> 1200, 2400, 4800, 9600, 19200, 38400 <DataBits> 8,7. Note that SiRF protocol is only valid f8 Data bits <StopBits> The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 13 of 21...
- Page 14 Format： $PSRF101,<X>,<Y>,<Z>,<ClkOffset>,<TimeOfWeek>,<WeekNo>,<chnlCount>,<ResetCfg> *CKSUM<CR><LF> <X> X coordinate position INT32 <Y> Y coordinate position INT32 <Z> Z coordinate position INT32 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 14 of 21...
- Page 15 UBYTE <ResetCfg> bit mask 0×01=Data Valid warm/hotstarts=1 0×02=clear ephemeris warm start=1 0×04=clear memory. Cold start=1 UBYTE The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 15 of 21...
- Page 16 When a valid message is received, the parameters will be stored in battery backed SRAM and then the receiver will restart using the saved parameters. Format: ＄PSRF102,<Baud>,<DataBits>,<StopBits>,<Parity>*CKSUM<CR><LF> <baud> 1200,2400,4800,9600,19200,38400 <DataBits> <StopBits> The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 16 of 21...
- Page 17 0=SetRate,1=Query <rate> Output every <rate>seconds, off=0,max=255 <cksumEnable> 0=disable Checksum,1=Enable checksum for specified message Example 1: Query the GGA message with checksum enabled The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 17 of 21...
- Page 18 Format: ＄PSRF104,<Lat>,<Lon>,<Alt>,<ClkOffset>,<TimeOfWeek>,<WeekNo>, <ChannelCount>, <ResetCfg>*CKSUM<CR><LF> <Lat> Latitude position, assumed positive north of equator and negative south of The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 18 of 21...
- Page 19 GPS Week Number UINT16 <ChannelCount> Number of channels to use. 1-12 UBYTE <ResetCfg> bit mask 0×01=Data Valid warm/hot starts=1 0×02=clear ephemeris warm start=1 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 19 of 21...
- Page 20 (ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the selected datum. The default datum is WGS 84 (World Geodetic System 1984) which provides a The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 20 of 21...
- Page 21 (Local map datums are a best fit to the local shape of the earth and not valid worldwide.) Examples: Datum select TOKYO_MEAN $PSRF106,178*32 The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology. Page 21 of 21...
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