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Link Budget Calculator Internal Data
19.2.2 Link Budget Calculator Internal Data
For each product (or Regulation and Band) the calculator stores the following data required
for link budget calculations:
•
Maximum Transmit power (per modulation)
•
Receiver Sensitivity (per modulation) for Ethernet service
•
Maximum linear input power (used to calculate minimum distance)
•
Antenna gain and cable loss for radio unit with integrated antenna
•
Available Channel Bandwidths
19.3 Calculations
19.3.1 EIRP
(Equivalent Isotropically Radiated Power)
EIRP
TxPower
AntennaGain
=
+
19.3.2 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
+
20
ExpectedFadeM
in
arg
where Sensitivity is dependent on air‐rate.
19.3.3 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
RADWIN 2000+ Series User Manual
CableLoss
–
SiteA
AntennaGain
–
+
frequency
log
MHz
10
ExpectedRSS Sensitivity
=
–
ExpectedRSS
, at the highest air‐rate for which this relationship is true. In a
RequiredFadeM
+
Release 4.2.40
SiteA
CableLoss
–
SiteB
RequiredRange
+
20
log
10
MaxInputPower
in
.
arg
SiteB
Km
per air‐rate.
19‐2
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