- frequency-measuring device
- Техника: частотомер
Универсальный англо-русский словарь. Академик.ру. 2011.
frequency-measuring device
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Measuring receiver — In telecommunication, a measuring receiver or measurement receiver is a calibrated laboratory grade radio receiver designed to measure the characteristics of radio signals. The parameters of such receivers (tuning frequency, receiving bandwidth,… … Wikipedia
frequency meter — ▪ measurement device device for measuring the repetitions per unit of time (customarily, a second) of a complete electromagnetic waveform. Various types of frequency meters are used. Many are instruments of the deflection type, ordinarily… … Universalium
Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) … Wikipedia
ANSI Device Numbers — The ANSI Standard Device Numbers [ [http://www.geindustrial.com/pm/notes/ref/ANSI.pdf GE Multilin ANSI Standard Device Number] ] [ Protective Relaying Manual , Pennsylvania Electric Association (1975)] [ [http://www.basler.com/downloads/ANSI… … Wikipedia
Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… … Wikipedia
Radio-frequency sweep — or Frequency sweep or RF sweep refer to scanning a radio frequency band for detecting signals being transmitted there. This is implemented using a radio receiver having a tunable receiving frequency. As the frequency of the receiver is changed to … Wikipedia
Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 … Wikipedia
quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… … Universalium
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
