u-blox ANTARIS 4 - Sensitivity Settings (Tracking and Acquisition Modes)

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4.5.8 Sensitivity Settings (Tracking and Acquisition Modes)
extendingtheintegration
timeoftheGPSsignal.Thismeansthathigher sensitivityisatrade-off versusthetime ittakestodetect aGPS
hardware setup and the user application determine which
 sensitivity mode will
.
• Norma
• Fast Acquisition (optimized for fast acquisition, at the cost of 3dB less sensitivity
than with the ‘normal’
ting
• High S al’ setting,at the
costoflongerstartuptimes.).
 Note For SuperSense
®
 Receivers the Sensitivity setting only affects the startup performance, but not the
Foragivenhardwaresetup(antennaandreceiver),highersensitivitycanbereachedby
signal. Therefore, both the
providethebestperformance
TheANTARIS
®
4GPSTechnologyallowsthesensitivityofthereceivertobemodifiedinfoursteps.Namely,they
are:
• Auto Sensitivity(sensitivityautomaticallyadjustedaccordingtomeasuredsignallevels).
lSensitivity(tradeoffbetweensensitivityandtimetoacquire)
set )
ensitivity(optimized forhighersensitivity, i.e.3dB more sensitivethan the ‘norm
trackingperformance.
The Sensitivity Setting can be changed using UBX – CFG (Config) – RXM (Receiver Manager) proprietary
messages.
Receiver Sensitivity
High
Long
Low
Normal Mode
Fast Acquisition
Short
TTFF
Input Signal Level
SuperSense Auto
High Sensitivity
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Figure 81: Receiver Sensitivity (Acquisition)
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 95