Radwin 2000 C PLUS - Calculations

RADWIN2000CPlusUserManual Release3.5.70 18‐2
Calculations Chapter18
• AntennagainandcablelossforODUwithintegratedantenna
• AvailableChannelBandwidths
Calculations
EIRP
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.
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
.
Service
TheEthernetandconfiguredTDMtrunksthroughputiscalculatedaccordingtointernal
productalgorithms.
Availability
TheServiceAvailabilitycalculationisbasedontheVigantsBarnettmethodwhichpredictsthe
downtimeprobabilitybasedonaclimatefactor(Cfactor).
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+