Rhydolabz GPS-1268 User manual

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Document : Datasheet Model # : GPS - 1268
Date : 10-Jan -10
Mini G-Mouse-USB
User Manual
Rhydo Technologies (P) Ltd.
(An ISO 9001:2008 Certified R&D Company)
Golden Plaza, Chitoor Road,
Cochin – 682018, Kerala State, India
Phone : [phone]
Cell : 0091- 99466 70444
Fax : 0091 - 484-2370579
E-mail : [e-mail], [e-mail]
WebSite : http://www.rhydolabz.com

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History
History
Date Rev. Description
2008/06/11 A00 First Release (Preliminary)
2008/12/16 A01 Second Release (Preliminary)
2008/04/04 A02 Formally Release
Page 6 :Change Spec :Cable length is 2 meter .
Page 6 : Remove cable customization
2009/05/15 A03 Page 5:Add LED status description
Page 8: Add NMEA protocol for reference
2009/07/10 A04 Modify Max. Update Rate 5Hz to upgrade 10Hz (By
firmware customization)
Update chipset sensitivity spec. to -165dbm

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SYSTEM BLOCK
ANT
LNA
SA W
2.8V
TC X O
5V
3.3V R e gul a t or
RTC Backup Ba tt e ry GPS Si ng l e Chip
U S B
Connector
Cr ys t a l
D-
D+
GN D
GND

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FEATURES
Description
The miniGMouse-USB is a GPS module. It is a GPS receiver providing a solution that high
position and speed accuracy performances as well as high sensitivity and tracking capabilities
in urban conditions .The GPS chipsets inside the module are designed by MediaTek Inc.,
which is the world's leading digital media solution provider and largest fab-less IC company
in Taiwan. The module can support up to 66 channels. The GPS solution enables small form
factor devices. They deliver major advancements in GPS performances, accuracy, integration,
computing power and flexibility. They are designed to simplify the embedded system
integration process. The module is the best choice for you to design the GPS related products.
L1 frequency, C/A code, 66-channel
Embedded LNA and SAW filter
High sensitivity：Up to -165dBm tracking, superior urban performance1
Position accuracy：< 3m CEP (50%) without SA (horizontal)
Cold Start is Under 35 seconds (Typical) 1
Warm Start is Under 34 seconds (Typical)1
Low power consumption：48mA@ acquisition, 38mA@ tracking
DGPS(WAAS, EGNOS, MSAS) support (optional by firmware)
Update rate：1Hz (Default)
RoHS compliant

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Mechanical
Dimension：(Unit: mm)
USB
(Male)
PinConfiguration
PinDefinition
Pin
Name I/O Description
1USB_PW PDC Supply Power Input
2D_ I/O USB Port D- Signal
3D+ I/O USB Port D+ Signal
4GND PGround
LED Status:
Led Indicator Description
GPS positioning status On : GPS Inquiring
Blinking: GPS Positioning fix

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Specification
General
Chipset MTK MT3329
Frequency L1, 1575.42MHz
C/ACode 1.023 MHz
Channels 66 channels
SBAS WAAS, EGNOS,MSAS Supported
Datum WGS84(Default),Tokyo-M, Tokyo-A, User Define
Dimensions
Length/Width/Height 46(L)x33(W)x17.3(H)mm, without cable
Cable Length 2m
Performance Characteristics
PositionAccuracy
Without aid：3.0m 2D-RMS
< 3m CEP (50%) without SA (horizontal)
DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))
：
2.5m
VelocityAccuracy Without aid
：
0.1 m/s
DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))
：
0.05m/s
AccelerationAccuracy Without aid
：
0.1 m/s²
DGPS (RTCM, SBAS (WAAS, EGNOS, MSAS))
：
0.05m/s²
Timing Accuracy 100 ns RMS
Sensitivity1
Acquisition：-148dBm (Cold Start)
Reacquisition：-160dBm
Tracking：-165dBm
Update Rate 1Hz (Up to 10 Hz by firmware customization)

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Acquisition (Open sky, stationary)
Reacquisition Time
1
Less than 1 second
Hot start
1
1.0s (Typical)
Warm start134s (Typical)
Cold start
1
35s (Typical)
Dynamic
Altitude Maximum 18,000m
Velocity Maximum 515m/s
Acceleration Maximum 4G
Power
Input Voltage DC 5.0V ±5%
Power Consumption @ 5.0V
Acquisition：48mATypical
Tracking：38mATypical
I/O
Signal Output 8 data bits, no parity, 1 stop bit
Baud Rates 9600bps (4800/38400/57600/115200 bps by option)
Protocols NMEA0183 v3.01 (Default：GGA,GSA,GSV,RMC,VTG) RTCM
MTK NMEA Command
Environment
OperatingTemperature -40℃to 85 ℃(without coin battery)
-20℃to 60 ℃(with coin battery )
Storage Temperature -50℃to 90 ℃(without coin battery)
-20℃to 60 ℃(with coin battery )
Operating Humidity 5% to 95% (no condensing)
1 Reference to GPS chipset specification

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NMEA Output Sentence
Table-1 lists each of the NMEAoutput sentences specifically developed and defined
by MTK for use within MTK products
NMEAOutput Sentence Table-1
Option Description
GGA Time, position and fix type data.
GSA GPS receiver operating mode, active satellites
used in the position solution, and DOP values.
GSV The number of GPS satellites in view satellite ID
numbers, elevation, azimuth, and SNR values.
RMC Time, date, position, course and speed data.
Recommended Minimum Navigation Information.
VTG Course and speed information relative to the
ground.

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GGA—Global Positioning System Fixed Data. Time, Position and fix related data
for a GPS receiver
Table-2 contains the values for the following example：
$GPGGA,064951.000,2307.1256,N,12016.4438,E,1,8,0.95,39.9,M,17.8,M,,*65
GGAData Format Table-2
Name Example Units Description
Message ID $GPGGA GGAprotocol header
UTC Time 064951.000 hhmmss.sss
Latitude 2307.1256 ddmm.mmmm
N/S Indicator NN=north or S=south
Longitude 12016.4438 dddmm.mmmm
E/W Indicator EE=east or W=west
PositionFix
Indicator 1See Table-3
Satellites Used 8Range 0 to 14
HDOP 0.95 Horizontal Dilution of
Precision
MSL Altitude 39.9 meters AntennaAltitude above/below
mean-sae-level
Units Mmeters Units of antenna altitude
Geoidal
Separation 17.8 meters
Units Mmeters Units of geoidal separation
Age of Diff. Corr. second Null fields when DGPS is not
used
Checksum *65
<CR> <LF> End of message termination
Position Fix Indicator Table-3
Value Description
0Fix not available
1GPS fix
2Differential GPS fix

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GSA—GNSS DOP and Active Satellites
Table-4 contains the values for the following example：
$GPGSA,A,3,29,21,26,15,18,09,06,10,,,,,2.32,0.95,2.11*00
GSAData Format Table-4
Name Example Units Description
Message ID $GPGSA GSAprotocol header
Mode 1 ASee Table-5
Mode 2 3See Table-6
Satellite Used 29 SV on Channel 1
Satellite Used 21 SV on Channel 2
.... …. …. ....
Satellite Used SV on Channel 12
PDOP 2.32 Position Dilution of Precision
HDOP 0.95 Horizontal Dilution of Precision
VDOP 2.11 Vertical Dilution of Precision
Checksum *00
<CR> <LF> End of message termination
Mode 1 Table-5
Value Description
MManual—forced to operate in 2D or 3D mode
A2DAutomatic—allowed to automatically switch 2D/3D
Mode 2 Table-6
Value Description
1Fix not available
22D (
＜
4 SVs used)
33D (≧4 SVs used)