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RGM-3550LP User Manual
RGM-3550LP User Manual
Version 1.3
2008/11/19
This document contains information highly confidential to RoyalTek Company
LTD (RoyalTek). It is provided for the sole purpose of the business discussions
between supplier and RoyalTek and is covered under the terms of the
applicable Non-Disclosure Agreements. Disclosure of this information to other
parties is prohibited without the written consent of RoyalTek.
Prepared by RoyalTek Company LTD.
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RGM-3550LP User Manual 0. Revision History Rev Release Date Change Description Editor 1.0 2007/3/26 Initial Draft Amanda Lee 1.1 2007/4/30 Current-- Amanda Lee Acquisition: 50mA (typical) Tracking: 45mA (typical) 1.2 2007/5/14 Chipset Sensitivity: -159dBm (tracking) Amanda Lee Cold start: 35 sec@ open sky Warm start: 35 sec@ open sky Hot start:1 sec @ open sky 1.3 2008.11.19 Add 25x25x2mm patch antenna Amy Liu drawing 2
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RGM-3550LP User Manual Content 1. Introduction...............................................................................................4 2. RGM-3550LP Picture and Pin Definition...................................................5 3. RGM-3550LP System Block Diagram.......................................................6 4. RGM-3550LP Technique Specification......................................................7 5. Mechanical Layout..................................................
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RGM-3550LP User Manual RoyalTek GPS Module: RGM-3550LP Operational Manual 1. Introduction RoyalTek RGM-3550LP smart antenna GPS module (patch antenna embedded and external antenna supported) is inherited from RGM-3550, but lower power consumption than RGM-3550. The smart antenna GPS module is powered by SiRF Star III technology and RoyalTek proprietary navigation algorithm that providing you more stable navigation data. The 6-pin connector design is the easiest and convenient solution
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RGM-3550LP User Manual 2. RGM-3550LP Picture and Pin Definition Pin 1 Pin 6 31 ±0.3 mm 35 ± 0.3mm 5
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RGM-3550LP User Manual 3. RGM-3550LP System Block Diagram System block diagram description: Patch antenna with 1 Stage LNA 4Mega bits flash memory on chip MMCX External Antenna Supported 6 pin I/O pin (see page 7, Interface pin definition) LNA GPS Patch Antenna SIRF GSC3F 6 Pin I/O with 4M Flash MMCX Switch SAW RF frontend +Base-band Connector Processor External Antenna TCXO XTAL 6
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RGM-3550LP User Manual 4. RGM-3550LP Technique Specification No Function Specification GPS receiver 1 Chipset SiRF GSC3F/LP single chipset 2 Frequency L1 1575.42MHz. 3 Code C.A. Code. 4 Channels 20. 5 Chipset Sensitivity -159dBm (tracking) 6 Cold start 35 sec@ open sky 7 Warm start 35 sec@ open sky 8 Hot start 1 sec @ open sky 9 Reacquisition 0.1sec typical 9 Position accuracy 10meters at 2D RMS. 10 Maximum altitude 18000 m 11 Maximum velocity 514 m/s 12 Trickle power mode
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RGM-3550LP User Manual 24 Storage temperature -40 ~ +85 ℃(except for SRAM battery backup -40 to +60 degree Celsius) ≦95% 25 Humidity 26 Lead Free Yes External Antenna RF Input 27 2.85V ± 0.5% Drive Output Voltage 28 Drive Output Current 30mA (max) 29 Connector Type MMCX Interface Pin definition (VDD=2.85V ±2%) 1. 2. 3 . 4. 5. 6 EXT Ant RF IN Pin # Signal Name I/O Description Characteristics V ≥ 0.7 *VDD V ≤ 0.3*VDD 1 RX I Serial port A IH IL V ≥ 0.75*VDD
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RGM-3550LP User Manual RX This is the main receiver channel and is used to receive software commands to the board from SIRFdemo software or from user written software. PS: Pull up if not used. TX This is the main transmitting channel and is used to output navigation and measurement data to SiRFdemo or user written software. GPS Status GPS Status Pin can be connected to a LED to indicate the status of GPS signal 1. Solid: Power ON/ Tracking for Satellite 2. Blinking: 3D Fix Found
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RGM-3550LP User Manual 5. Mechanical Layout 25x25x4mm patch antenna 25x25x2mm patch antenna 10
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RGM-3550LP User Manual 6. How to Assemble/Fix RGM-3550LP Below is our recommendation to assemble/fix up RGM-3550LP GPS module on the customer board or device case. Hole Hole 11
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RGM-3550LP User Manual 7. Software Specification and NMEA Protocol Software Specification - Standard SiRF firmware for SSIII (GSW3 & SiRFLoc 3) - Upload firmware GPS Firmware - RGM-3550LP [GSW3][SBAS GGA(1), GSA(1), GSV(1), RMC(1) 9600 GPS Firmware, version 2.1.0.123 (default) GPS Utility - A GPS performance diagnostic utility is required - C/NO, TTFF WAAS - Enable GPS status - See GPS status light indicating specification NMEA V3.0 Protocol Its output signal level is TTL: 96
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RGM-3550LP User Manual Table 2 GGA Data Format Name ExampleUnits Description Message ID $GPGGA GGA protocol header UTC Position 161229.487 hhmmss.sss Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 Dddmm.mmmm E/W Indicator W E=east or W=west Position Fix Indicator 1 See Table 2-1 Satellites Used 07 Range 0 to 12 HDOP 1.0 Horizontal Dilution of Precision MSL Altitude 9.0 meters Units M meters Geoid Separation meters Units M me
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RGM-3550LP User Manual Table 3 GLL Data Format Name ExampleUnits Description Message ID $GPGLL GLL protocol header Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 Dddmm.mmmm E/W Indicator W E=east or W=west UTC Position 161229.487 hhmmss.ss Status A A=data valid or V=data not valid Checksum *2C ＜CR ＞＜LF ＞ End of message termination GSA-GNSS DOP and Active Satellites Table 4 contains the values of the following example: $GPGSA,
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RGM-3550LP User Manual Table 4-2 Mode 2 Value Description M Manual-forced to operate in 2D or 3D mode A Automatic-allowed to automatically switch 2D/3D GSV-GNSS Satellites in View Table 5 contains the values of the following example: $GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138, 42*71$GPGSV, 2, 2, 07, 09, 23, 313, 42, 04, 19, 159, 41, 15, 12, 041, 42*41 Table 5 GGA Data Format Name ExampleUnits Description Message ID $GPGSV GSV protoc
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RGM-3550LP User Manual Table 6 GGA Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Position 161229.487 hhmmss.sss Status A A=data valid or V=data not valid Latitude 3723.2475 ddmm.mmmm N/S Indicator N N=north or S=south Longitude 12158.3416 dddmm.mmmm E/W Indicator W E=east or W=west Speed Over Ground 0.13 knots Course Over 309.62 degrees True Ground Date 120598 ddmmyy Magnetic Variation degrees E=east or W=west Checksum *10 ＜C
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RGM-3550LP User Manual GPS Receiver User’s Tip 1. GPS signal will be affected by weather and environment conditions, thus suggest to use the GPS receiver under less shielding environments to ensure GPS receiver has better receiving performance. 2. When GPS receiver is moving, it will prolong the time to fix the position, so suggest to wait for the satellite signals to be locked at a fixed point when first power-on the GPS receiver to ensure to lock the GPS signal at the shortest time.
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RGM-3550LP User Manual 8. Package Specification and Order Information 1 2 3 Copyright © 2007-2008, RoyalTek Company Ltd.
