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Tsunami MP.11a Antenna Installation Guide
Calculating Received Signal Level and Link Budget
Use the following formula to estimate the received signal level (RSL):
RSL (dBm) = P
out
- L
1
+ G
1
+ G
2
- L
2
- L
p
where:
P
out
is the transmitter output power (in dBm)
L
1
is the total loss of all transmission elements between the antenna and the RF Unit on one
side of the link (in dB)
G
1
is the gain of the antenna on one side of the link (in dB)
G
2
is the gain of the antenna on the opposite side of the link (in dB)
L
2
is the total loss of all transmission elements between the antenna and the RF Unit on the
opposite side of the link (in dB)
L
p
is the Path loss, defined by:Lp (dB) = 96.6 + 20 log
10
F + 20 log
10
D
where:
F is the Frequency of the radio system in GHz (5.8 in the case of this model)
D is the Distance of the path in miles
See the following figure for a visual representation of the elements of this equation.
Chapter 2. Determining Range and Clearance 21
CPN 65756B Issue Date: August 2003