User Manual of W20-GSM Indoor single band selective repeaters
Confidential Page
12
Picture 5.1
：
Curve of output power, input signal and attenuation
value
P
Output Powe:
output power
P
input Power:
input power
V
ATT:
attenuation vale
P
input Power
-V
ATT:
input power—attenuation value
P
max
: output power rating
Downlink gain setting
As for the downlink working performance, “orange” is a good working point. At this
time, downlink output power and coverage effect are stable.
But from another point of view, we hope the equipment is as far as possible away
from overloading status of “red” (thus the equipment would hold higher interference
depression ability). So we try our best to set the equipment near “edge point” when
engineering.
Setting of “edge point”: (Switch on the power supply after connection with donor
antenna and coverage antenna, and observe ALARM indicator.)
■
If it shines “orange”, use 1dB as stepping to increase attenuator until “green”
turns on, then decrease 1~3dB attenuation value until “orange” turns on. The
setting of downlink gain can reach the perfect status.
■
If it shines “green” then,
◆
To check whether the attenuation value has been set, if it is, use 1dB as
stepping to decrease attenuation until the “orange” turns on, then the downlink gain
can reach the perfect status.
◆
But if attenuation is not set, it indicates that the input power is not enough.
z
Then please check coverage effect first, if the coverage effect is
good, the engineering has reached expecting target
z
But if the coverage effect is not so good, the donor antenna should
be adjusted until “orange” turns on or the effect reaches the target.
