Baseband and Signal Conditioning

The baseband stage serves as an analog signal processing chain that optimizes the mixer output for high-fidelity digitization.

It employs an LPF to filter out the sum frequency and unwanted high-frequency components to prevent aliasing,

while the PGA scales the signal for amplitude conditioning, maximizing ADC dynamic range or preventing saturation

Frequency Conditioning of Baseband Signal

At a fixed 2.5 MHz sampling rate, the baseband signal is limited to the Nyquist frequency (1.25 MHz)  for anti-aliasing.

To further ensure superior signal integrity and robust processing,

it will be best if the actual signal bandwidth is intentionally maintained within 30%(around 375 kHz) or lower of this limit.