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2. Frequency mixer - Wikipedia

   en.wikipedia.org/wiki/Frequency_mixer

   Frequency mixer. In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. In its most common application, two signals are applied to a mixer, and it produces new signals at the sum and difference of the original frequencies. Other frequency components may also be produced ...

3. Heterodyne - Wikipedia

   en.wikipedia.org/wiki/Heterodyne

   Frequency mixer symbol used in schematic diagrams. A heterodyne is a signal frequency that is created by combining or mixing two other frequencies using a signal processing technique called heterodyning, which was invented by Canadian inventor-engineer Reginald Fessenden.

4. Frequency synthesizer - Wikipedia

   en.wikipedia.org/wiki/Frequency_synthesizer

   Frequency synthesizer. A frequency synthesizer is an electronic circuit that generates a range of frequencies from a single reference frequency. Frequency synthesizers are used in devices such as radio receivers, televisions, mobile telephones, radiotelephones, walkie-talkies, CB radios, cable television converter boxes, satellite receivers ...

5. Local oscillator - Wikipedia

   en.wikipedia.org/wiki/Local_oscillator

   Local oscillator. In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal. This frequency conversion process, also called heterodyning, produces the sum and difference frequencies from the frequency of the local oscillator and frequency of the input signal.

6. Rotordynamics - Wikipedia

   en.wikipedia.org/wiki/Rotordynamics

   Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage. At its most basic level, rotor dynamics is concerned ...

7. Intermodulation - Wikipedia

   en.wikipedia.org/wiki/Intermodulation

   Intermodulation. A frequency spectrum plot showing intermodulation between two injected signals at 270 and 275 MHz (the large spikes). Visible intermodulation products are seen as small spurs at 280 MHz and 265 MHz. Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different ...