Calculations; About The Fresnel Zone - Radwin 5000 HPMP User Manual

Calculations

Calculations
EIRP
EIRP = TxPower +
Expected RSS and Fade Margin
ExpectedRSS = EIRP PathLoss
where:
Site A is the transmitting site
Site B is the receiving site
PathLoss is calculated according to the free space model,
PathLoss = 32.45
ExpectedFadeM arg
where Sensitivity is dependent on air-rate.
Min and Max Range
MinRange is the shortest range for which
MaxRange (with Adaptive checked) is the largest range for which

ExpectedRSS Sensitivity
link with adaptive rate this will be the actual behavior.
MaxRange (for a given air-rate) is the largest range for which

ExpectedRSS Sensitivity
Service
The Ethernet and configured TDM trunks throughput is calculated according to internal prod-
uct 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).
Availability
7 –
 
= 1 6 – 10 Cfactor
– ExpectedFadeM arg
------------------------------------------------------------
10

10
Antenna Height
The recommended antenna height required for line of sight is calculated as the sum the Fres-
nel zone height and the boresight height. See
RADWIN 5000 HPMP User Manual
AntennaGain
SiteA
– + AntennaGain
 
+ 20 log frequency
10
in = ExpectedRSS Sensitivity
, at the highest air-rate for which this relationship is true. In a
+ RequiredFadeM

frequency
GHz
in
Release 3.3.30
– CableLoss
SiteA
– CableLoss
SiteB
 
+ 20 log
MHz
10
–

ExpectedRSS MaxInputPower
.
arg in
 
RequiredRange

About the Fresnel Zone

Chapter 19
SiteB

RequiredRange
Km
per air-rate.
3

KM
below. Using the

19-2