An important new application is the determination of the power in the individual code channels of a 3GPP FDD signal. By determining the code domain power, the FSIQ includes all the subscriber channels in its measurements and checks the power ratios between the individual channels. Precise power control of the individual subscriber channels is vital for optimal utilization of the radio channel resources. The FSIQ displays the power characteristic in a mobile radio channel versus all the timeslots of a frame. The new FSIQ firmware supports all measurements in the code domain and provides comprehensive functionality for code domain analysis.