Question: In the context of measuring the output signal of a TX under test in a FDD system, what is the primary purpose of applying a matched filter to the acquired signal?
Option 1: To reduce out-of-band emissions and minimize interference
Option 2: To amplify the signal for better processing and analysis
Option 3: To modify the signal's shape for compatibility with different receivers
Option 4: To enhance the signal-to-noise ratio (SNR) for more accurate measurements
Explanation: Applying a matched filter in this context is crucial for optimizing the signal-to-noise ratio (SNR), but more specifically, it helps to reduce out-of-band emissions and minimize interference. This is essential for ensuring that the measurements accurately reflect the TX under test's performance within its designated frequency band, without undue influence from adjacent channels or external noise sources. The matched filter's correct shape and positioning on the frequency axis (as mentioned in the context) further support this purpose, as it ensures that only the signal components of interest are properly processed.