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
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 3.2.00
–
CableLoss
SiteA
–
CableLoss
SiteB
+
20
log
MHz
10
–
ExpectedRSS
MaxInputPower
.
arg
in
RequiredRange
Chapter 18
SiteB
RequiredRange
Km
per air-rate.
3
KM
18-2