Radwin 2000+ SERIES - C.3 Considerations for Changing Antenna Parameters

RADWIN2000+SeriesUserManual Release4.2.40 C‐3
ConsiderationsforChangingAntennaParameters
C.3ConsiderationsforChangingAntenna
Parameters
Let:
maxAvailableTxPowerdenotethemaximumTxPowerpracticallyavailablefromanODU.(It
appearsasTxPowerperRadio.)
maxRegEIRPdenotethemaximumEIRPavailablebyregulation.Itwillbedeterminedby
threefactors:
•perband/regulation
•perchannelbandwidth
• antennagain
maxRegTxPowerdenotethemaximumregulatoryTxPowerfortheequipment,alsohaving
regardtheabovethreepoints.
Then,thefollowingrelationshipmustbesatisfied:
...(*)
TheTxPower(perradio)indicatesthepowerofeachradioinsidetheODUandisusedforLink
BudgetCalculations.TheTxPower(System)showsthetotaltransmissionpoweroftheODU
andisusedtocalculatetheEIRPaccordingtoregulations.
Theinequality(*)aboveisalwayssatisfiedbythesysteminaccordancewiththerelevant
regulation.
Thepreciserelationshipbetweentheitemsininequality(*)isasfollows:
• RequiredTxPower(perradio)willbeadjusteddowntothelesserofthevalueentered
andmaxAvailableTxPower
• TxPower(system)ismaxAvailableTxPower+3(for2radios)
• MaxEIRPismaxRegEIRP.
• ToseetherelationshipbetweenTxPower(radio)andTxPower
(system),not e thatsothatifyou
doublethepowerinmilliWatts(f ortworadios)thendBmwill
increaseby .
• TheMaxEIRPlevelwillbeautomaticallysetaccordingtothe
selectedbandandregulation.
• TheEIRPlevelisthesumoftheSys temTxPowerandtheAntenna
GainminustheCableLoss.
maxAvailableTxPower min maxRegEIRP
AntennaGain CableLoss maxRegTxPower+–
(
)

dBm 10 milliWatt
10
log=
10 2 3
10
log