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2. Frequency modulation - Wikipedia

   en.wikipedia.org/wiki/Frequency_modulation

   Frequency modulation and phase modulation are the two complementary principal methods of angle modulation; phase modulation is often used as an intermediate step to achieve frequency modulation. These methods contrast with amplitude modulation , in which the amplitude of the carrier wave varies, while the frequency and phase remain constant.

3. Non-contact atomic force microscopy - Wikipedia

   en.wikipedia.org/wiki/Non-contact_atomic_force...

   While recording frequency-modulated images, an additional feedback loop is normally used to keep the amplitude of resonance constant, by adjusting the drive amplitude. By recording the drive amplitude during the scan (usually referred to as the damping channel as the need for a higher drive amplitude corresponds to more damping in the system) a ...

4. File:Frequency Modulation.svg - Wikipedia

   en.wikipedia.org/wiki/File:Frequency_Modulation.svg

   You are free: to share – to ... This image is a derivative work of the following images: File:Frequency-modulation.png licensed with Cc-by-sa-2.0, Cc-by-sa-3.0 ...

5. Optical transfer function - Wikipedia

   en.wikipedia.org/wiki/Optical_transfer_function

   The 'modulation transfer function' (just a term for the magnitude of the optical transfer function with phase ignored) gives the true measure of lens performance, and is represented by a graph of amplitude against spatial frequency.

6. Chirp - Wikipedia

   en.wikipedia.org/wiki/Chirp

   This type of modulation employs sinusoidal waveforms whose instantaneous frequency increases or decreases linearly over time. These waveforms are commonly referred to as linear chirps or simply chirps. Hence the rate at which their frequency changes is called the chirp rate. In binary chirp modulation, binary data is transmitted by mapping the ...

7. List of amateur radio modes - Wikipedia

   en.wikipedia.org/wiki/List_of_amateur_radio_modes

   Most amateur digital modes are transmitted by inserting audio into the microphone input of a radio and using an analog scheme, such as amplitude modulation (AM), frequency modulation (FM), or single-sideband modulation (SSB). Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode.

8. Modulation - Wikipedia

   en.wikipedia.org/wiki/Modulation

   Categorization for signal modulation based on data and carrier types. In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted. [1]

9. Stochastic screening - Wikipedia

   en.wikipedia.org/wiki/Stochastic_screening

   Traditional amplitude modulation halftone screening is based on a geometric and fixed spacing of dots, which vary in size depending on the tone color represented (for example, from 10 to 200 micrometres). The stochastic screening or FM screening instead uses a fixed size of dots (for example, about 25 micrometres) and a distribution density ...