- precise frequency
- A frequency requirement accurate to within one part in 1,000,000,000.

*Military dictionary.
2000.*

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**Frequency-resolved optical gating**— Frequency Resolved Optical Gating, plus couramment désigné par son acronyme FROG, est une méthode de mesure des impulsions lumineuses ultra brèves (de l ordre de la femtoseconde) par auto corrélation. Son principe repose sur un montage de type… … Wikipédia en Français**Frequency-Resolved Optical Gating**— Frequency Resolved Optical Gating, plus couramment désigné par son acronyme FROG, est une méthode de mesure des impulsions lumineuses ultra brèves (de l ordre de la femtoseconde) par auto corrélation. Son principe repose sur un montage de type… … Wikipédia en Français**Frequency comb**— A frequency comb is the graphic representation of the spectrum of a mode locked laser. An octave spanning comb can be used for mapping radio frequencies into the optical frequency range or it can be used to steer a piezoelectric mirror within a… … Wikipedia**Precise Tone Plan**— The Precise Tone Plan specification for the North American network defines the Call progress tones used for standard signaling in the PSTN. The tones are as follows:* dial tone is a continuous tone having frequencies of 350 and 440 Hz at a level… … Wikipedia**Frequency compensation**— In electrical engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will… … Wikipedia**Frequency standard**— A frequency standard is a stable oscillator used for frequency calibration or reference. A frequency standard generates a fundamental frequency with a high degree of accuracy and precision. Harmonics of this fundamental frequency are used to… … Wikipedia**Frequency probability**— Statistical probability redirects here. For the episode of Star Trek: Deep Space Nine, see Statistical Probabilities. John Venn Frequency probability is the interpretation of probability that defines an event s probability as the limit of its… … Wikipedia**Dual-tone multi-frequency signaling**— One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… … Wikipedia**Dual-tone multi-frequency**— (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… … Wikipedia**radio-frequency heating**— ▪ physics Introduction process of heating (heat) materials through the application of radio waves of high frequency i.e., above 70,000 hertz (cycles per second). Two methods of radio frequency heating have been developed. One of these,… … Universalium