Rainbow-electronics DAB-GPS-C01 Instrukcja Użytkownika Pobierz pdf (Strona 5)

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LEA-5H,LEA-5S,LEA-5A-DataSheet Preliminary u-bloxproprietary 

GPS.G5-MS5-07026-P4

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1.8 Antenna

LEA-5modulesaredesignedforusewithpassiveandactiveantennas.

AnoptionalantennasupervisorisavailablewiththeLEA-5H,LEA-5SandLEA-5A.Inthedefaultoperationmode

the antenna supervisor is activated and enables the receiver to detect short circuits to the active antenna by

checkingthebiasvoltage levelandcanshutdo

wnthe voltagebiasimmediately.Aseriesresistor isneededin

frontoftheV_ANTinput.UBXandNMEAmessagesareprovidedtoreporttheconditionoftheantennasupply.

Opencircuitdetectioncanalsobesupportedwithanadditionalexternalcircuit.Fordetails,pleaserefertothe

LEA-5 H

ardware Integration Manual [1].

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Parameter Specification

AntennaType Passiveandactiveantenna

ActiveAntenna

Recommendations

Minimumgain

Maximumnoisefigure

Maximumgain

15-20dB(tocompensatesignallossinRFcable)

1.5dB

30dB

Table 3: Antenna Specifications for all LEA-5 Modules

Parameter Specification

AntennaSupply

UsingVCC_RForexternalvoltagesource

AntennaSupervisor

Shortcircuitdetection

Opencircuitdetection

Built-in

Enabledwithexternalcircuit

Table 4: Antenna Supervisor Specifications for LEA-5H, LEA-5S and LEA-5A

1 2 3 4 5 6 7 8 9 10 ... 14 15

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Rainbow-electronics DAB-GPS-C01 Instrukcja Użytkownika Strona 5