Globalsat EM-408 Specifications
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Globalsat EM-408 Specifications

Gps engine board
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Globalsat Technology Corporation
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235,
Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
service@globalsat.com.tw
www.globalsat.com.tw
EM-408
GPS Engine Board
EM-408
Page 1 of 14
USGlobalSat, Inc.
14740 Yorba Court, Chino, CA 91710
Tel: 909.597.8525 / Fax: 909.597.8532
oem@usglobalsat.com
www.usglobalsat.com
Specifications are subject to be changed without notice.
Version 1.4.1

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  • Page 1 EM-408 Version 1.4.1 GPS Engine Board EM-408 Globalsat Technology Corporation USGlobalSat, Inc. 16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, 14740 Yorba Court, Chino, CA 91710 Taiwan Tel: 909.597.8525 / Fax: 909.597.8532 Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899 oem@usglobalsat.com service@globalsat.com.tw www.usglobalsat.com...

  • Page 2: Product Information

    Product Part I.D. EM-408 Product Description The EM-408 GPS engine board is low cost but maintains high reliability and accuracy making it an ideal choice for integration with OEM/ODM systems. The EM-408 features an integrated patch antenna for complete implementation.
  • Page 3 EM-408 Version 1.4.1 Sensitivity -159dBm Cold Start 42 seconds average Warm Start 38 seconds average Hot Start 8 second average Reacquisition 0.1 second average Accuracy Position: 10 meters, 2D RMS 5 meters, 2D RMS, WAAS enabled Velocity: 0.1 ms Time: 1µs synchronized to GPS time...

  • Page 4: Technical Information

    EM-408 Version 1.4.1 2. Technical Information Physical Characteristics Specifications are subject to be changed without notice. Page 4 of 14...

  • Page 5: Pin Assignment

    EM-408 Version 1.4.1 Pin Assignment Pin Explanation ENABLE/DISABLE: On / Off VCC: (DC power input) This is the main DC supply for a 3.3V power module board. This is the main transmit channel for outputting navigation and measurement data to user’s navigation software or user-written software.

  • Page 6: Software Commands

    EM-408 Version 1.4.1 Mounting Recommended mounting methods: a. Use industrial grade double-sided foam tape. Place it on the bottom side of the engine board. b. A recessed cavity in your housing design with a foam pad to eliminate shifting or movement.
  • Page 7 EM-408 Version 1.4.1 Table B-3 Position Fix Indicator Value 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...
  • Page 8 EM-408 Version 1.4.1 VDOP Vertical dilution of Precision Checksum <CR><LF> End of message termination 1. Satellite used in solution. Table B-6 Mode1 Value Description Manual-forced to operate in 2D or 3D mode 2D automatic-allowed to automatically switch 2D/3D Table B-7 Mode 2...
  • Page 9 EM-408 Version 1.4.1 $GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,*10 Table B-9 RMC Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Time 161229.487 hhmmss.sss Status A=data valid or V=data not valid Latitude 3723.2475 ddmm.mmmm N/S Indicator N=north or S=south Longitude 12158.3416 dddmm.mmmm...
  • Page 10 EM-408 Version 1.4.1 ■ NMEA Input Command A.) Set Serial Port ID:100 Set PORTA parameters and protocol This command message is used to set the protocol (SiRF Binary, NMEA, or USER1) and/or the communication parameters (baud, data bits, stop bits, parity). Generally, this command is utilize to switch the GPS module back to SiRF Binary protocol mode, where an extensive message commands are readily available.
  • Page 11 EM-408 Version 1.4.1 <Y> Y coordinate position INT32 <Z> Z coordinate position INT32 <ClkOffset> Clock offset of the receiver in Hz, Use 0 for last saved value if available. If this is unavailable, a default value of 75000 for GSP1, 95000 for GSP 1/LX is used.
  • Page 12 EM-408 Version 1.4.1 D.) Query/Rate Control ID:103 Query standard NMEA message and/or set output rate This command is used to control standard NMEA data output messages: GGA, GLL, GSA, GSV, RMC, and VTG. Using this command message, standard NMEA message is polled once, or setup for periodic output.
  • Page 13 EM-408 Version 1.4.1 <ClkOffset> Clock Offset of the receiver in Hz, use 0 for last saved value if available. If this is unavailable, a default value of 75000 for GSP1, 95000 for GSP1/LX is used. INT32 <TimeOfWeek> GPS Time Of Week UINT32 <WeekNo>...

  • Page 14: Units Description

    EM-408 Version 1.4.1 Name Example Units Description Message ID $PSRF106 PSRF106 protocol header Datum 21= WGS84 178= Tokyo_Mean 179= Tokyo_Japan 180= Tokyo_Korea 181= Tpkyo_Okinawa Checksum <CR><LF> End of message termination * * * Specifications are subject to be changed without notice.

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