Duplexing and multiplexing options squeeze more bandwidth out of airwaves and fiber while mmWave shifts frequency allocation closer to the edges of the RF spectrum poster. The wireless revolution has driven higher RF spectrum utilization and channel density, along with more interference sources. Modern RF spectrum analyzers also provide detailed insight into channel utilization, signal phase, and modulation properties. The display convention for RF spectrum analysis has remained virtually unchanged, with the radio frequency visible on the x (horizontal) axis and the signal power (amplitude) plotted using a logarithmic scale on the y-axis. Although spectrum analysis equipment and technology has been adapted for optical, audio, and other applications, the radio frequency spectrum analyser was developed specifically to characterize RF signal behavior over a given frequency range.
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