User Manual Part 2

Lynx.GX Installation and Management
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 either:
Lp (dB) = 96.6 + 20 log
10
F + 20 log
10
D (D=distance in miles)
or:
Lp (dB) = 92.4 + 20 log
10
F + 20 log
10
D (D=distance in kilometers)
where:
F is the Frequency of the radio system in GHz (5.8 in the case of this model)
The results of this link budget calculation are very important for verifying proper installation and can significantly
help identify problems during installation and troubleshooting. If you have calculated the expected RSL, you can
verify that it has been achieved during installation and use the actual results compared to expected results for
troubleshooting, if necessary.
Appendix A. Installation Planning 51