Plain-language answer: A spectrum analyzer displays signal amplitude across frequency, revealing carriers, harmonics, noise, spurious outputs, and occupied bandwidth.
Why it matters
Its front end is sensitive: a transmitter connected without enough attenuation can destroy it, while incorrect resolution bandwidth or reference level can hide or distort results.
Use it well
Estimate maximum input first, use a dummy load and rated attenuator or coupler, then set span, reference level, and bandwidth for the measurement.
The common mistake
Connecting transmitter output directly because the analyzer covers the frequency.
Authority and safety boundary
Current regulations, electrical codes, equipment manuals, program authorization, and the served organization’s procedures control. This article is practical orientation, not permission to transmit, alter protective wiring, or self-deploy.
