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spectrum analyzer

   Also found in: Acronyms, Wikipedia 0.04 sec.

A hardware device or software used to examine the frequency and power components of a signal. It provides more information than an oscilloscope, because it can display the signals over a range of frequencies. For example, whereas an oscilloscope would show total noise level, a spectrum analyzer would show the noise as related to frequency. Available in both analog and digital models, digital analyzers sample the incoming waveforms and convert them to fast fourier transforms (FFTs).

Bandwidth Resolution
The range of frequencies being analyzed is the "bandwidth," while the width of the individual samples is the "bandwidth resolution." In the following example, the bandwidth is 86 Hz to 20 kHz, and the bandwidth resolution is 40 Hz. Each sample represents a 40 Hz section of the displayed 19,914 Hz band. See oscilloscope.

An Audio Analysis
This example shows the power levels and frequencies of an audio signal as displayed in a software-based spectrum analyzer.
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Tokyo, Japan, Dec 21, 2006 - (JCN Newswire) - Anritsu Corporation (TSE:6754), a global leader in communications equipment and measuring instruments, has announced the launch of its compact MS2720B Spectrum Analyzer series, the world's first handheld analyzer to support all Regulation* test items for installation and maintenance of W-CDMA base stations.
Anritsu Introduces World's First Handheld MS2720B Spectrum Analyzer ... by JCN Newswires
The PM, TMDE is fielding the AN/USM-677 spectrum analyzer, NSN 6625-01470-7545, and the new OS-303/G oscilloscope, NSN 6625-01-470-7541.
New TMDE equipment authorized by PS, the Preventive Maintenance Monthly
The zNose operates much like a chemical spectrum analyzer for hydrocarbons.
IN BRIEF by Daily News (Los Angeles, CA)
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