1. Introduction Designed for coverage expansion of conventional macro cell base station for rural area with low popularity. To minimize the influence in ul path by higher power from dl, both paths are fully separated by electrical and mechanical. High-precision power control by zero error attenuator technology. Adaptive pwm fan control protects residents from loud noise. It has following key features : - supports 1.8ghz wcdma band, 3fa - gsm 900/1800/1900, cdma 800/1900, lte 900/1800 band also available - consists of two unit by dl and ul - dl : 50dbm, ul : 0dbm output - high input range : 30 ~ 46dbm - high precision output control by hybrid analog and digital attenuator - auto limit control , auto shut down, auto fan control - high ingress protection for harsh field environment