User's Manual

4.4. Installation Instruction:
You should be limit that installation the system uplink power is set <30dBm.
Please reference below chart for the system installation.
Model
Description
Example
Example
Example
A
Antenna gain(dBi)
18dBi
10dBi
7dBi
B
Cable loss(dB)
10dB
8dB
5dB
C
System gain(dB)
87dB
93dB
93dB
D
System uplink gain control
(Attenuator setting)
8.5dB 2.5dB 2.5dB
D’ (C+D=95dB)
Reference System gain(dB)
95dB
95dB
95dB
E
System uplink output
power(dBm)
21.5dBm 27.5dBm 27.5dBm
F
EIRP
30dBm
30dBm
30dBm
Formula
A – B ≤ D < 30dBm
-Explanation
A: Antenna gain (dBi)
B: Cable loss (dB)
C: = D’ (95dB maximum system gain before AGC kicks in) – D (uplink gain control)
If input level > -65dBm then AGC will reduce the gain by 1dB for every dB input level exceeds -65dBm
D: value can be calculated based on antenna gain after accounting for cable loss.
(Maximum: system uplink output gain; System gain (95dB) – input level (-65dBm) = 30dBm)
E: maximum output power (30dBm) – D (uplink gain control)
F: (EIRP) = E + A – B
Advanced RF Technologies, Inc. 24