Spectrum Analyzer Circuits -

: Used after the signal has been detected to smooth the display and improve amplitude accuracy by reducing noise.

: Determines the analyzer's ability to distinguish between two closely spaced signals. Spectrum Analyzer Circuits

For those looking to explore practical implementations or professional equipment, detailed technical documentation can be found in the Tektronix Spectrum Analyzer Measurement Concepts or through technical guides from Keysight Technologies . How Does a Spectrum Analyzer Work - Used Keysight Equipment : Used after the signal has been detected