Radwin 2000 Series - Calculations

Calculations Chapter 20
RADWIN 2000 User Manual Release 2.6.40 20-2
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 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).
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+
Availability
16–10
7–
 Cfactor frequency
GHz
 RequiredRange
KM

3

10
ExpectedFadeM inarg–
10
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