Radio Rack 4 x 12 - 48 is a full 4 inputs and 12 outputs bidirectional attenuation matrix. Signals from any input to any output ports can be independently controlled on the total 48 attenuators with 0 - 110 dB range. 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.