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2. Spectrum analyzer - Wikipedia

   en.wikipedia.org/wiki/Spectrum_analyzer

   A spectrum analyzer is also used to determine, by direct observation, the bandwidth of a digital or analog signal. A spectrum analyzer interface is a device that connects to a wireless receiver or a personal computer to allow visual detection and analysis of electromagnetic signals over a defined band of frequencies.

3. Signal analyzer - Wikipedia

   en.wikipedia.org/wiki/Signal_analyzer

   A signal analyzer is an instrument that measures the magnitude and phase of the input signal at a single frequency within the IF bandwidth of the instrument. It employs digital techniques to extract useful information that is carried by an electrical signal. [1] In common usage the term is related to both spectrum analyzers and vector signal ...

4. Spectral analysis - Wikipedia

   en.wikipedia.org/wiki/Spectral_analysis

   Spectrum analyzer, a hardware device that measures the magnitude of an input signal versus frequency within the full frequency range of the instrument; Spectral theory, in mathematics, a theory that extends eigenvalues and eigenvectors to linear operators on Hilbert space, and more generally to the elements of a Banach algebra

5. Diamond Cut Audio Restoration Tools - Wikipedia

   en.wikipedia.org/wiki/Diamond_Cut_Audio...

   Diamond Cut Audio Restoration Tools (DC-Art) was originally a private venture by R&D engineer Craig Maier and software engineer Rick Carlson. Developed in the early 1990s, the original concept was conceived in an attempt to preserve the extensive Edison Lateral collection of test pressing recordings held at the Edison National Historic Site in West Orange, New Jersey.

6. Talk:Spectrum analyzer - Wikipedia

   en.wikipedia.org/wiki/Talk:Spectrum_analyzer

   A spectrum analyzer is basicly a wide-band receiver displaying the frequency domain, showing amplitude vs frequency, where an oscilloscope shows the time domain as voltage vs time, In the field it can be used to check & aim antennas, look for interference sources, and to detect & measure a transmitted signal.

7. Vector signal analyzer - Wikipedia

   en.wikipedia.org/wiki/Vector_signal_analyzer

   A vector signal analyzer operates by first down-converting the signal spectra by using superheterodyne techniques.A portion of the input signal spectrum is down-converted [broken anchor] (using a voltage-controlled oscillator and a mixer) to the center frequency of a band-pass filter.

8. Real-time analyzer - Wikipedia

   en.wikipedia.org/wiki/Real-time_analyzer

   A real-time analyzer (RTA) is a professional audio device that measures and displays the frequency spectrum of an audio signal; a spectrum analyzer that works in real time. An RTA can range from a small PDA -sized device to a rack-mounted hardware unit to software running on a laptop .

9. Spectrum (functional analysis) - Wikipedia

   en.wikipedia.org/wiki/Spectrum_(functional_analysis)

   The set of approximate eigenvalues (which includes the point spectrum) is called the approximate point spectrum of T, denoted by σ ap (T). λ ∈ σ ( T ) {\displaystyle \lambda \in \sigma (T)} if T − λ I {\displaystyle T-\lambda I} does not have dense range.