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  Page | 10                                                                                Revision 1.4                                                                 15 January 
2015

 

Record operation in detail 

 

LabSat 3 uses SD card and HDD memory for storage and playback of GNSS data.  It is important to note that 
Class 10 or higher cards must be used to sustain the transfer speeds required.  When recording two 
constellation types, the data rate is approximately 8.2MB (Mega Bytes) per second.  To ensure that data is 
collected without error, the card should be able to sustain 10MB per second. Spare cards and HDDs may be 
purchased from Racelogic.  

 

It is important that cards are formatted as FAT32. LabSat 3 is able to format cards and HDDs in FAT32 with 
the optimum configuration for high speed recording.  When a card or HDD is formatted by LabSat 3, it will 
also carry out a performance test to determine whether or not the media can sustain the required 
bandwidth and inform the user if this is not the case. 

 

For record capable systems, the LabSat will be supplied with a magnetic mounting GNSS antenna. The 
antenna is an active device with approximately 28dB of gain.  The LabSat provides a 2.85V DC bias for 
antenna power on the centre pin of the RF IN connector. It is also possible to use third party antennas 
providing they are compatible with the 2.85V bias.  If connecting LabSat to an antenna which requires a 
higher bias voltage (e.g. 12v), the antenna bias must be supplied by the user and an appropriate DC block 
(such as DCB from 

http://gpsnetworking.com/attenuators.asp

) must be inserted at the LabSat 3 RF IN 

connector to avoid damage to the LabSat. 

 

There are a number of GNSS systems currently in operation or in a test phase. These operate on 3 main 
frequency bands. These are:- 

 

 

 

 
 
 
 

 

Depending on the model, LabSat 3 will have 1, 2 or 3 RF channels. This allows recording of 1, 2 or 3 
frequency bands so, for example, a 2 constellation LabSat 3 may record the band containing GPS L1/Galileo 
E1 and the band containing GLONASS L1 simultaneously.  Recording of the desired constellations is 
configured in the CONSTELLATION menu.  In this menu, the user can tick up to three of the desired 
constellation groups (depending on version).  If only one constellation is ticked, then an additional option 
for 2bit will be available to allow 2bit quantized recording for the selected constellation. 

 

Once the constellations are configured, exit the menu and press the REC button to begin recording. A new 
file will be created each time recording starts.  The file name used corresponds to the constellations 
selected.  For example, if GPS and GLONASS are selected for recording, the file created will be GPSGLO_nnn 
where nnn is a number that increments with each new recording.  Details of the LS3 file format are 
available on request from Racelogic. 

 

During recording, pressing the OK button will switch the display to show satellite levels for either GPS or 
GLONASS satellites.  In this display mode, the up and down arrow keys will toggle between GPS or GLONASS 
constellations.  BeiDou constellation is not currently supported by the internal monitor but BeiDou B1 
signals can still be recorded and replayed. 

 

To maximize battery life during recording, LabSat 3 has a power save mode which is enabled by default I n 
the setup menu.  Power save mode recognizes when running from battery power and will dim the display 
backlight and power-down the internal GPS/GLONASS monitor after 30 seconds of user inactivity.   

 

If recording from passive antennas such as the Maxtenna M1516HCT-SMA GPS/GLONASS antenna, enabling 
the power-save mode will also provide the highest possible sensitivity by ensuring that unused modules 
within LabSat 3 are switched off. 

Frequency Band 

Constellations 

1575.42MHz 

GPS L1, Galileo E1, QZSS, SBAS 

1602MHz 

GLONASS L1 

1561.098 

BeiDou B1 

Summary of Contents for 3 Wideband

Page 1: ...LabSat 3 GNSS Simulator User Manual...

Page 2: ...Page 2 Revision 1 4 15 January 2015 This page intentionally left blank...

Page 3: ...tting removal and handling 13 External reference clock input 14 Digital channels 14 Expansion connector 15 CAN Bus 16 DIGITIZE mode 16 LOG FILE mode 16 Filtering CAN frames 17 Digital in out 18 Remote...

Page 4: ...P Dual RF channel record replay system with CAN Bus RS232 Digital IO RLLS03 2P Dual channel replay only system with CAN Bus RS232 Digital IO RLLS03 1RP Single RF channel record replay system RLLS03 1P...

Page 5: ...satellites in view during recording Back at the Lab recorded signals can be replayed at the push of a button for repeatable reliable testing LabSat 3 Front LabSat 3 Rear Name Type Description POWER 2...

Page 6: ...luded with the LabSat 3 system includes the following files LabSat 3 sample scenarios GPS_000 Static 5 minute GPS scenario GLO_001 Static 5 minute GLO scenario BDS_001 Static 5 minute BDS scenario Lab...

Page 7: ...tus display During replay pressing the PLAY button will halt replay and return to the file list Example of Record Recording your own file to an SD card RP variants only To record a new file connect th...

Page 8: ...n the REF input Time Configure internal clock using UTC time from internal GNSS monitor or set manually LAN DHCP Enable Disable DHCP IP Address Set the IP address assigned to LabSat 3 SUBNET MASK Set...

Page 9: ...ay the LabSat will configure constellation frequencies and digital channels automatically before starting replay If a triple constellation file is selected for replay on a single channel LabSat all th...

Page 10: ...equency bands so for example a 2 constellation LabSat 3 may record the band containing GPS L1 Galileo E1 and the band containing GLONASS L1 simultaneously Recording of the desired constellations is co...

Page 11: ...ion to a PC using the DIR indicator When USB media is connected LabSat 3 will scan for files and display the files folders containing the ls3 format When recording to USB HDD LabSat will save scenario...

Page 12: ...ry power the battery charge status will be shown in the top right section of the display If external power is connected and the battery is being charged a power symbol will be shown over the battery s...

Page 13: ...ver incinerate nor dispose of cells in a fire Never short circuit the battery pack It will generate very high currents resulting in overheating of the cells which may cause electrolyte leakage gassing...

Page 14: ...S This is the 1 Pulse Per Second output from the internal GNSS monitor and will become active once the internal GNSS monitor has a position fix Note that if using battery power with the power save opt...

Page 15: ...levels for CAN 12 CAN 2 H I O CAN Bus High Channel 2 Standard ISO11898 voltage signal levels for CAN 13 CAN 2 L I O CAN Bus Low Channel 2 Standard ISO11898 voltage signal levels for CAN 14 I2C SDA I...

Page 16: ...n using the digitize method the CAN data is replayed exactly as recorded there will be no arbitration with other systems during replay Therefore if the CAN data is replayed into a system which is tran...

Page 17: ...current SD HDD An example of the CANFILTER TXT file is shown below The first two statements automatically configure the CAN Bus baud rates CAN1 500 00K this means 500KBit s CAN2 47 06K this means 47 0...

Page 18: ...3 connected via LAN to be accessed programmatically LabSat 3 is equipped with an Ethernet interface to allow remote control over a Local Area Network LAN Remote control is accomplished using simple t...

Page 19: ...B083 1 SMA plug to TNC plug cable 1M RLCAB084 1 LabSat 3 battery RLACS201 LabSat 3 expansion connector adapter RLACS202 LabSat 3 manual LS03MAN LabSat 3 cable identification sheet LS03 CABIDEN LabSat...

Page 20: ...ario section using the Browse button or manually type the file location When the file is loaded the scenario information will be displayed in the Scenario Details section The software will automatical...

Page 21: ...s available on the LabSat website in Customer Area section http www labsat co uk firmware If you need the latest file download it from the website and copy it to your computer How to upgrade the firmw...

Page 22: ...T performs Of course LabSat 3 can record and replay live data but creating an artificial scenario allows you to precisely control the data content and create a gold standard file for carrying out true...

Page 23: ...ngine will cause it to look for the wrong satellite signals Please also note that when using any GNSS equipment a clear view of the sky without physical obscuration is important Objects in the surroun...

Page 24: ...matrix Additional Logging 1 channel CAN RS232 or Digital firmware upgrade 2 channels of CAN RS232 Digital or 2 channels of log file CAN 1 2 channels of digital RS232 Digi 2 channels of CAN RS232 Digit...

Page 25: ...I Ground 0V SMA connectors RF OUT RF IN and REF Connector SMA Type SMA PIN NAME Description Range Centre RF IN RF Signal including DC bias for active antenna Bias output 2 8V to 3V RF OUT RF Signal Ou...

Page 26: ...Page 26 Revision 1 4 15 January 2015 LabSat 3 dimensions The LabSat 3 dimensions in millimetres...

Page 27: ...9 1736 790000 Racelogic USA 27240 Haggerty Rd Suite E17 Farmington Hills MI 48331 USA Contact Reid Scott Tel 1 248 994 9050 Fax 1 248 994 9054 Email labsat racelogic co uk Email labsat racelogic de Em...

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