Radwin RADWIN 2000 D+, User Manual

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RADWIN 2000 D+ User Manual Release 3.6.00 19 ‐ 2
Calculations Chapter 19
19.2 Calculations
19.2.1 EIRP
19.2.2 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.
19.2.3 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
.
19.2.4 Service
The Ethernet and configured TDM trunks throughput is calculated according to internal
product algorithms.
19.2.5 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 in
arg
ExpectedRSS Sensitivity
– =
ExpectedRSS MaxInputPower

ExpectedRSS Sensitivity

ExpectedRSS Sensitivity RequiredFadeM in
arg +
