a signal analyzer and a method for displaying code - channel power levels of cdma signal that contains code changes having different spreading factors . the individual code - channel power level is measured from a received signal and displayed in a diagram for a specified base spreading factor . the code channels having an alias power level are indicated . a code channel , with regard to the specified base spreading factor , has an alias power level when the code channel having the base spreading factor is inactive and when a code channel of a higher spreading factor is active , or , in the event of orthogonal transmit diversity , the power level of a code channel is mapped onto the code channel of the base spreading factor .