Question: In FDD Radio Transmission and Reception, what is the primary consideration for determining the sampling point when measuring the Decision Point Power (DPP) of a signal-under-test?
Option 1: The peak amplitude of the signal waveform
Option 2: The best estimate of Intersymbol-Interference-free points
Option 3: The average power of adjacent channels
Option 4: The minimum symbol error rate
Explanation: Decision Point Power (DPP) aims to accurately measure the signal's strength at a point where the signal is least affected by intersymbol interference, ensuring reliable symbol detection. Thus, sampling at the best estimate of Intersymbol-Interference-free points is crucial for an accurate DPP measurement, reflecting the signal's true strength at its most interpretable moments. This approach directly impacts the assessment of signal quality and receiver performance in telecom networks.