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Displays waveform of a signal, allows measurement of frequency, timing, peak excursion, offset, ... Psophometer: Measures AF signal level and noise Q meter: Measures Q factor of the RF circuits Tachometer: Measures speed of motors Signal analyzer: Measures both the amplitude and the modulation of a RF signal Signal generator
Many measurement devices outside this section may be used or at least become part of an identification process. For identification and content concerning chemical substances, see also Analytical chemistry, List of chemical analysis methods, and List of materials analysis methods.
signal strength A measure of the usable power of a physical signal. signal-flow graph A formal mathematical treatment of the representation of signal flow through a system, such as an analog computer or a radio receiver. signal-to-noise ratio A measure of the power contained in the useful part of the signal, to the power contained in noise.
There are notable non-electrical analog devices, such as some clocks (sundials, water clocks), the astrolabe, slide rules, the governor of a steam engine, the planimeter (a simple device that measures the surface area of a closed shape), Kelvin's mechanical tide predictor, acoustic rangefinders, servomechanisms (e.g. the thermostat), a simple mercury thermometer, a weighing scale, and the ...
Quantization (signal processing) Range imaging; Scanning SQUID microscope; Single-Photon Emission Computed Tomography (SPECT) Smartdust; SQUID, Superconducting quantum interference device; SSIES, Special Sensors-Ions, Electrons, and Scintillation thermal plasma analysis package; SSMIS, Special Sensor Microwave Imager / Sounder; Structured-light ...
An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information. [citation needed]
Analogue electronics (American English: analog electronics) are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two levels. The term analogue describes the proportional relationship between a signal and a voltage or current that represents the signal.
A mixed-signal oscilloscope (MSO) combines all the measurement capabilities and the use model of a Digital Storage Oscilloscope with some of the measurement capabilities of a logic analyzer. Analog and digital signals are acquired with a single time base, they are viewed on a single display, and any combination of these signals can be used to ...