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Set G2=P
DL MAX
-P
NODE B PORT Pilot CH
-7dB
“-7dB” explanation: pilot signal of WCDMA system only takes up 10% of the NODE B
total output power, and shall be set at 50% capacity, then the gain shall be set according to
the input power level of Pilot CH in order to avoid breathing effect, therefore there will be
5dB left from the total output power to leave the capacity to traffic channels
C. The Downlink maximum gain G
DL
≤
MIN (G2
，
G
noise
+8dB
，
L
ISO
-10dB) , usually the value shall
be the equal value, but if the coverage size is not big, please reduce the gain to some degree.
“G
noise
+8dB” explanation: The downlink gain can be maximum 8dB higher than uplink
gain in indoor repeater solutions
D. The attenuation should be less than 30 dB when you set the downlink gain of the repeater and
it would be the best to attenuate less than 15dB range, and in case more than 15dB
attenuation is needed, please use external attenuator.
Uplink gain setting
UL maximum gain G
UL
≤
MIN
（
G
DL
，
G
noise
，
L
ISO
-10dB
）
With the condition of meeting above formula, G
UL
value is usually between G
DL
and G
DL
-4dB
8.6. System Test
8.6.1. Check whether the coverage is good
1) Have a test with mobile phone or data card (engineering mobile phone is preferred). If the signals in most
areas have not been improved, please check below again:
The weak input signal leads to the low output power. Change the direction of donor antenna or Its
installation position or replace donor antenna with higher gain to increase input signal power level.
Check whether it is necessary to add more server antennas due to barriers, whether the repeater’s
power is enough; please install more server antennas or change with a repeater with higher power
level.
2) If the signals in small part of the areas have not been improved, please check below:
Check whether the service antenna is installed correctly or not, you may try to move the antnena
location improve coverage
Check if it is necessary to use use a directional antenna
