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Dual Band ICS Repeater User Manual
4 Commissioning
The following chapter outlines the process to optimize the performance of the repeater. The gain
setting, isolation, downlink output power, and repeater uplink noise contribution will be
considered
4.1 Commissioning Principle
4.1.1 Downlink Output Power
To ensure the required power of the repeater is achieved at the MS port of the repeater, the
following condition should be met.
For WCDMA System
For LTE system
4.1.2.1 Gain and Output Power
The gain is the amplifying ability of the repeater. The repeater has a constant gain for both uplink
and downlink. The gain can be adjusted by setting an attenuation value.
The maximum output power of the repeater is determined by the linearity of the amplifier block of
the repeater. For any given input signal power, its corresponding output is increased by the gain
of the repeater, the output power will increase along a linear curve based on the fix gain value.
If the input signal amplified by the gain set exceeds the rated maximum output, the AGC
(automatic gain control) function will be triggered. The AGC ensures that the maximum output
power of repeater is maintained and does not overdrive the repeater’s amplification circuit. An
Example using the repeater with gain 95dB and 5W (37dBm) output power is shown below.
Figure 13
DL Gain = Min {(DL Required Output Power - Input Power– 10dB), Maximum DL Gain}
DL Gain = Min {(DL Required Output Power - Input Power– 8dB), Maximum DL Gain}
