Radio Rack 8 x 2 - 8 includes two independent 4x1 bidirectional attenuation sub - systems. Each sub - system can control 4 independent RF attenuation input channels and combined at one output. Users can easily simulate path loss on each channel or simulate the mobility scenarios between the sectors with usage of power combiners. The instrument supports all the major wireless technologies including CDMA/EVDO/GSM/UMTS/HSPA/LTE/WiMAX.