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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. Noise floor - Wikipedia

    en.wikipedia.org/wiki/Noise_floor

    Measurement from a spectrum analyzer showing a noise-like measurement from an unspecified component.. In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a measurement system, where noise is defined as any signal other than the one being monitored.

  4. Two-tone testing - Wikipedia

    en.wikipedia.org/wiki/Two-tone_testing

    Isolators are included in the test set up as with the component testing. [10] The combined test signal can be injected directly in to the receiver if the antenna is removable. A second directional coupler, connected in the conventional configuration, can be used to provide a feed of the input to a spectrum analyser.

  5. Radio-frequency sweep - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_sweep

    A spectrum analyzer is a standard instrument used for RF sweep. It includes an electronically tunable receiver and a display. The display presents measured power (y axis) vs frequency (x axis). The power spectrum display is a two-dimensional display of measured power vs. frequency. The power may be either in linear units, or logarithmic units ...

  6. 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 ...

  7. Noise spectral density - Wikipedia

    en.wikipedia.org/wiki/Noise_spectral_density

    It is commonly used in link budgets as the denominator of the important figure-of-merit ratios, such as carrier-to-noise-density ratio as well as E b /N 0 and E s /N 0. If the noise is one-sided white noise , i.e., constant with frequency, then the total noise power N integrated over a bandwidth B is N = BN 0 (for double-sided white noise, the ...

  8. Phase noise - Wikipedia

    en.wikipedia.org/wiki/Phase_noise

    Spectrum analyzer based measurement can show the phase-noise power over many decades of frequency; e.g., 1 Hz to 10 MHz. The slope with offset frequency in various offset frequency regions can provide clues as to the source of the noise; e.g., low frequency flicker noise decreasing at 30 dB per decade (= 9 dB per octave). [3] Phase noise ...

  9. EMF measurement - Wikipedia

    en.wikipedia.org/wiki/EMF_measurement

    broadband measurements: performed using a broadband probe, that is a device which senses any signal across a wide range of frequencies and is usually made with three independent diode detectors; frequency selective measurements : in which the measurement system consists of a field antenna and a frequency selective receiver or spectrum analyzer ...