Radwin 2000+ SERIES - Calculations; Eirp; Expected RSS and Fade Margin; Link Budget Calculator Internal Data

RADWIN2000+SeriesUserManual Release4.2.40 19‐2
LinkBudgetCalculatorInternalData
19.2.2LinkBudgetCalculatorInternalData
Foreachproduct(orRegulationandBand)thecalculatorstoresthefollowingdatarequired
forlinkbudgetcalculations:
• MaximumTransmitpower(permodulation)
• ReceiverSensitivity(permodulation)forEthernetservice
• Maximumlinearinputpower(usedtocalculateminimumdistance)
• Antennagainandcablelossforradiounitwithintegratedantenna
• AvailableChannelBandwidths
19.3Calculations
19.3.1EIRP
(EquivalentIsotropicallyRadiatedPower)
19.3.2ExpectedRSSandFadeMargin
where:
SiteAisthetransmittingsite
SiteBisthereceivingsite
PathLossiscalculatedaccordingtothefreespacemodel,
whereSensitivityisdependentonair‐rate.
19.3.3MinandMaxRange
MinRangeistheshortestrangeforwhichperair‐rate.
MaxRange(withAdaptivechecked)isthelargestrangeforwhich
,atthehighestair‐rateforwhichthisrelationshipistrue.Ina
linkwithadaptiveratethiswillbetheactualbehavior.
MaxRange(foragivenair‐rate)isthelargestrangeforwhich
.
EIRP TxPower AntennaGain
SiteA
CableLoss
SiteA
–+=
ExpectedRSS EIRP PathLoss AntennaGain
SiteB
CableLoss
SiteB
–+–=
PathLoss 32.45 20 frequency
MHz
20 RequiredRange
Km

10
log+
10
log+=
ExpectedFadeM inarg ExpectedRSS Sensitivity–=
ExpectedRSS MaxInputPower
ExpectedRSS Sensitivity
ExpectedRSS Sensitivity RequiredFadeM inarg+