Ouster OS2 - GPS;GNSS Synchronization Guide; Setting up your GPS;GNSS; Connecting the Hardware

8 GPS/GNSSSynchronizationGuide
This guide will explain how to physically connect a GPS to your Ouster sensor and synchronize the
Oustersensortimestamp toanNMEAsentence.
8.1 SettingupyourGPS/GNSS
ItisimportanttoensureyouhaveconfiguredyourGPSaccordingtothemanufacturer’sspecifications.
TheOustersensor acceptsthefollowing:
NMEAsentencetype: GPRMC only(futuresupportforothersentencetypes)
BaudRates: 9600 or 115200
Polarity: Normal orReversed(ACTIVE_HIGH
1
orACTIVE_LOW
2
)
Voltage: 3.3 - 15 V logicwitha minimumdrivecurrentof 5 mA.
IfyourGPScan’tmeettheseminimumsyouwillneedtobufferthevoltagewithanadditional
circuit. Details intheDigital IOsectionoftheOusterHardwareUserManual.
Note: Once you have configured your GPS, it is good practice to verify the signals using an oscil-
loscope. This will ensure you have the correct baud rate, polarity, voltage, and message type being
output.
→
1 Lowtohigh edgeascritical timingevent
2 Hightolowedge ascriticaltiming event
8.2 ConnectingtheHardware
The next step to successfully connecting your GPS is ensuring that you haveconnected the outputs
fromyourGPStothe correctinputsofthesensor.
ForlabapplicationswhereyouwillusetheInterfaceBox,itisrecommendedtouseterminatedjumper
wireslikethesetoensureasolidconnection.
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