u-blox ANTARIS 4 - Power Saving Modes (Fixnow Mode, FXN)

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S Disabling SBAS (WAAS, EGNOS) reduces the current consumption by up to 3mA
ngonthenumberofvisibleSBASsatellites).
BAS
(dependi
U  the update rate from 1Hz to 0.2Hz (1position in 5seconds) results in a
current saving of about 0.6mA. Increasing the update rate from 1Hz to 4Hz
consumptionby2to3mA
pdateRate Reducing
increasesthecurrent
Power lyvoltage LoweringVccfrom3.3Vto2.85Vreducesthecurrentconsumptionbyapprox.1mAsupp
Idlingserial
d to the  application, reduces
the current consumption by approximately
By sending a CFG-PRT message with
ports Disablingaserialport(e.g.port2),whichis
not connecte
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0.4mA.
Protocol in and Protocol out set to ‘none’,
theportcanbecompletelydisabled.
Table 11: Means to reduce Power Consumption in Continuous Tracking Mode
ined
intoSleepStatetofurtherreducethepowerconsumptionofthereceiver.
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Arestartofthereceivercanbecomparedtoareacquisitionscenario;thereforethesamesensitivitylevelapplies
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entpowerstatesinfluencingthefunctionandpowerconsumptionofthereceiver.
4.2.7 Power Saving Modes (FixNOW™ Mode, FXN)
In FixNOW™Mode (FXN), the receiver will shut down automatically if there is no GPS signal and wake up at
predef intervals inorder toacquire GPSPVT  Data. FixNOW™Mode also allowsthe GPS receiverto be set
whenareceiverwakesupfromanyFixNOW™OffState.
Note DonotuseFixNOW™onDRenabledGPSReceivers(e.g.LEA-4R/TIM-4R)
4.2.7.1 Power States
IntheContinuousTrackingMode(CTM)thereceiverisalways
intheFullPowerState.InFixNOW™Mode(FXN)
thereceivermayusediffer
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Modes
Power States CTM FXN Description
Full Power State
 
Thisisthestateduringsatelliteacquisition,reacquisitionandtracking.Allactive
sectionsarepowered.
Sleep State
CanbeselectedinFXNModewhenno navigationsolutionisrequiredorpossible.
ivercanbewokenupviaEXTINTinterruptsorserialportcommand
-

Therece
Backup State -

CanbeselectedinFXNModewhenno navigationsolutionisrequiredorpossible.
CPU Only - -
Notavailablebydefault.
T iew Powe
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able 12: Overv r States
Full Power
State
Backup State
Sleep State
CPU only State
On State Off State
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Figure 54: On State - Off State
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 65