Question: In UTRA repeater measurements for Error Vector Magnitude (EVM), what is the primary purpose of passing the measured waveform through a matched root raised cosine filter with specific bandwidth and roll-off?
Option 1: To amplify the signal to maximum rated output power per channel
Option 2: To modify the waveform to minimize the error vector by optimizing frequency, phase, amplitude, and chip clock timing
Option 3: To filter out noise from adjacent channels in the WCDMA signal
Option 4: To convert the signal for compatibility with GSM standards
Explanation: Passing the measured waveform through a matched root raised cosine filter (with specified bandwidth and roll-off) conditions the signal. This, along with optimizing parameters (frequency, absolute phase, absolute amplitude, and chip clock timing), minimizes the difference between theoretical and measured waveforms, accurately calculating EVM for assessing UTRA repeater modulation accuracy.