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PDF SKG12B Data sheet ( Hoja de datos )
| Número de pieza | SKG12B | |
| Descripción | GPS Module | |
| Fabricantes | Skylab | |
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Skylab SKG12B
Datasheets
GPS Module DataSheet
Name: Ultra High Sensitivity and Low Power GPS Receiver Module
Model No.: SKG12B
Revision: 001
Revision History:
Revision
001
Description
Initial Release to 001
Approved
Woody
Date
20120708
1 DS-SKG12B-V1
www.skylab.com.cn
1 page  
Skylab SKG12B
Datasheets
Advanced Software Features
AlwaysLocate™
AlwaysLocateTM is an intelligent controller of periodic mode. Depending on the environment and motion conditions,
GPS module can adaptively adjust working/standby time to achieve balance of positioning accuracy and power
consumption. In this mode, the host CPU does not need to control GPS module until the host CPU needs the GPS
position data. The following flow chart is an example to make GPS module go into AlwaysLocateTm mode and then
back to normal operation mode.
AGPS Support for Fast TTFF (EPO™)
The AGPS (EPO™) supply the predicated Extended Prediction Orbit data to speed TTFF ,users can download the
EPO data to GPS engine from the FTP server by internet or wireless network ,the GPS engine will use the EPO data to
assist position calculation when the navigation information of satellites are not enough or weak signal zone .
Embedded Logger function
The Embedded Logger function don’t need host CPU (MCU ) and external flash to handle the operation , GPS Engine
will use internal flash (embedded in GPS chipset ) to log the GPS data (Data format : UTC, Latitude , longitude,
Valid ,Checksum ), the max log days can up to 2 days under AlwaysLocate™ condition .
AIC_Multi-tone active interference canceller
Because different application (Wi-Fi , GSM/GPRS,3G/4G,Bluetooth )are integrated into navigation system , the
harmonic of RF signal will influence the GPS reception , The multi- tone active-interference canceller can reject
external RF interference which come from other active components on the main board , to improve the capacity
of GPS reception without any needed HW change in the design .SKG12B can cancel up to 12 independent
channel interference continuous wave.
Performance Specification
Parameter
Receiver Type
Sensitivity
Accuracy
Acquisition Time
Specification
L1 frequency band,
Tracking
Acquisition
Position
Velocity
Timing (PPS)
Cold Start
C/A code, 22 Tracking / 66 Acquisition-Channel
-162dBm Typical
-145dBm Typical
3.0m CEP50 without SA(Typical Open Sky)
0.1m/s without SA
10ns RMS
23s(Typical Open Sky)
4 DS-SKG12B-V1
www.skylab.com.cn
5 Page 
Skylab SKG12B
Datasheets
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
GSA-GNSS DOP and Active Satellites
This sentence contains the mode of operation, type of fix, PRNs of the satellites used in the solution
as well as PDOP, HDOP and VDOP.
$GPGSA,A,3,26,05,18,15,27,29,,,,,,,1.52,1.25,0.87*0F
Table 4: GSA Data Format
Name
Example
Units
Description
Message
$GPGSA
GSA protocol header
Mode 1
A
See Table 4-2
Mode 2
3
See Table 4-1
ID of satellite used
26
Sv on Channel 1
ID of satellite used
05
Sv on Channel 2
……
…
ID of satellite used
<Null>
Sv on Channel 12 (Null fields when it is not Used)
PDOP
1.52
Position Dilution of Precision
HDOP
1.25
Horizontal Dilution of Precision
VDOP
0.87
Vertical Dilution of Precision
Checksum
*0F
EOL
<CR> <LF>
End of message termination
Table 4-1: Mode 1
Value
Description
1 Fix not available
2 2D Fix
3 3D Fix
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
This sentence contains the PRNs, azimuth, elevation, and signal strength of all satellites in view.
$GPGSV,3,1,12,15,79,333,42,42,50,127,,29,45,263,44,02,36,124,30*7E
$GPGSV,3,2,12,26,36,226,34,05,35,046,22,27,33,161,29,21,16,319,*7D
$GPGSV,3,3,12,10,15,066,31,18,14,285,45,24,12,319,15,08,09,047,18*7E
Table 5: GSV Data Format
10 DS-SKG12B-V1
www.skylab.com.cn
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| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SKG12B.PDF ] | |
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