  This thesis is organized into four chapters:
  Chapter 1 provides an overview of previous missions focused on monitoring
earthquake precursors from space and highlights popular theories connecting
space-measured seismic precursors to earthquakes. It also briefly reviews key
theoretical concepts related to sensors in plasma.
  Chapter 2 offers a detailed description of the CSES mission, including
CSES-01 and CSES-02, and emphasizes the essential components of EFD-02, noting
any innovations compared to previous experiments with similar objectives.
  Chapter 3 covers functionality tests ensuring the instrument's correct
electronic operation under different environmental conditions and discusses
various performance tests, highlighting the instrument's characteristics.
  Chapter 4 reports results from calibration using a signal generator in a
dedicated laboratory and instrument characterization with a plasma source. This
chapter also analyzes the calibration factor's variability and underscores the
significance of these tests and measurements for the CSES-02 mission, both
operationally and scientifically.
