Installation and User Manual
EtherHaul
1200™
EH-INST-02, Issue 4.0
Page 25
Calculating the expected RSSI:
Where:
P
tx
– ODU’s Tx Power (typ5dBm)
Gant1 – Gain of antenna 1 (in dBi)
Gant2 – Gain of antenna 2 (in dBi)
LFS – Loss of Free Space = 92.45+20*Log (D
Km
*F
GH
z)+
-
D - Link distance in Km
-
F – Frequency in GHz)
Att
atm
– Attenuation due to Atmospheric gases (~0.5dB/Km)= 0.5* D
Km
RSSI = P
tx
+ G
ant1
– LFS – Att
atm
+ Gant2