Antenna and Microwave Laboratory Babol Noshirvani University of Technology Antenna and Microwave Laboratory Babol Noshirvani University.

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Antenna and Microwave Laboratory Babol Noshirvani University of Technology Antenna and Microwave Laboratory Babol Noshirvani University of Technology, Iran In the name of God Microwave Equipments

Spectrum Analyzer 8562A

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Spectrum Analyzer 8562A

Antenna and Microwave Laboratory Babol Noshirvani University of Technology

Another Oscilloscope ??? Like an oscilloscope Oscilloscope in time domain Spectrum analyzer in frequency domain (selectable)

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Is Frequency Domain Better? In time domain, all frequency components of signals are summed together In freq domain, complex signals are separated into their frequency components

Antenna and Microwave Laboratory Babol Noshirvani University of Technology What does SA do? Processes the signal Displays the spectral content of the input signal within a selected range of frequencies i.e., signal power(db) versus frequency Measures frequency, power, harmonic content, modulation, spurs, and noise, etc…

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Types of RF Spectrum Analyzer Two common ways to measure RF signals: Fourier Transform: Swept-Tuned or Swept-Toned: Capture time domain signals information Digitizes time domain signal (digital sampling) Perform Fourier transform Fast, but limits in frequency range, sensitivity “Sweep” across frequency range Display the frequency of interest Large frequency range Widely used

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Three Primary Function Keys Frequency (Hz) Amplitude (Abs dBm, Rel dB) Span (Hz) -> (how big the “window” we want to view)

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Principals of a Spectrum Analyzer 10

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Typical Output Displayed

Antenna and Microwave Laboratory Babol Noshirvani University of Technology Typical Output Displayed

Synthesized Sweeper 8341B

Vector Network Analyzer (VNA)