Analyzer Circuits | Spectrum

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

: In digital analyzers, the signal is sampled in the time domain, and a computer or microprocessor performs an FFT algorithm to calculate the frequency components. This method is highly attractive for its precision and speed, though it was historically more rare. Key Components & Parameters Spectrum Analyzer Circuits

: This is the classic analog approach. It uses a Local Oscillator (LO) to "sweep" through a range of frequencies, mixing them with the incoming signal to produce an Intermediate Frequency (IF) . This IF signal then passes through a narrow-band filter and an amplifier for display. : Determines the analyzer's ability to distinguish between

: The total range of frequencies shown on the horizontal axis, which can be narrowed to "zoom in" on specific signals. Key Components & Parameters : This is the

: This architecture uses a series of parallel filters, each tuned to a different frequency. While this provides a real-time view of multiple frequencies simultaneously, it is often more complex and expensive to implement for broad spans.