Absynth features three main synthesis modules which can be customized to a particular synthesis type, such as Subtractive, Frequency Modulation, Amplitude Modulation, or Granular, as well as direct sampling of raw audio data.

In some analog video formats ( Frequency modulation is the standard method for recording the luminance part of the signal, and is used to record a composite video signal in Direct colour systems ), e. g. Video 2000 and some Hi-band formats a pilot tone is added to the signal to detect and correct timebase errors.

The transform preserves stability and maps every point of the frequency response of the continuous-time filter, to a corresponding point in the frequency response of the discrete-time filter, although to a somewhat different frequency, as shown in the Frequency warping section below.

Frequency modulation can be classified as narrowband if the change in the carrier frequency is about the same as the signal frequency, or as wideband if the change in the carrier frequency is much higher ( modulation index > 1 ) than the signal frequency.

** Frequency modulation ( FM ) ( here the frequency of the carrier signal is varied in accordance to the instantaneous amplitude of the modulating signal )

# Frequency shifting of the RF signal to the equivalent baseband I and Q signals, or to an intermediate frequency ( IF ) signal, by multiplying the RF signal with a local oscillator sinewave and cosine wave frequency ( see the superheterodyne receiver principle ).

Operation on 80 meters, 40 meters and the other High Frequency ( HF ) amateur radio bands was initially accomplished using make and break keying since frequency shift keying ( FSK ) was not yet authorized.

International amateur radio ALE High Frequency channels are frequency coordinated with all Regions of the International Amateur Radio Union ( IARU entity of ITU ), for international, regional, national, and local use in the Amateur Radio Service.

Frequency of optimum transmission, in the transmission of radio waves via ionospheric reflection, is the highest effective ( i. e. working ) frequency that is predicted to be usable for a specified path and time for 90 % of the days of the month.

Frequency deviation ( Δf ) is used in FM radio to describe the maximum instantaneous difference between an FM modulated frequency and the nominal carrier frequency.

MUF is a median frequency, defined as the highest frequency at which skywave communication is possible 50 % of the days in a month, as opposed to the lowest usable high frequency ( LUF ) which is the frequency at which communication is possible 90 % of the days, and the Frequency of optimum transmission ( FOT ).

* Frequency mixer, a telecommunications device used to shift the frequency spectrum of a signal

The Standard Time and Frequency Signal ( STFS ) is a time signal service available in the United States which provides standard time and frequency signals, broadcast on very precise carrier frequencies by the U. S. Naval Observatory and the National Institute of Standards and Technology ( NIST ), formerly the National Bureau of Standards ( NBS ).

Negotiations to defend the frequency allocation for parts of the spectrum most useful for observing the Universe are coordinated in the Scientific Committee on Frequency Allocations for Radio Astronomy and Space Science.

* Frequency domain, a term used to describe the analysis of mathematical functions with respect to frequency, rather than time

The BIUs contain Radio Frequency ( RF ) modems which modulate a carrier signal to transmit digital information using 1MHz of the available bandwidth in the 24Mhz frequency range.

The NTIA Manual of Regulations and Procedures for Federal Radio Frequency Management, also known as the Red Book, is a publication of the United States Office of Spectrum Management of the National Telecommunications and Information Administration or NTIA, and is the official source for all technical regulations relating to the use of the electromagnetic frequency spectrum.

The X-rays will penetrate to the D-region, releasing electrons that will rapidly increase absorption, causing a High Frequency ( 3-30 MHz ) radio blackout.

During this time Very Low Frequency ( 3 – 30 kHz ) signals will be reflected by the D layer instead of the E layer, where the increased atmospheric density will usually increase the absorption of the wave and thus dampen it.

The Pelvic Pain Urgency / Frequency ( PUF ) Patient Survey, created by C. Lowell Parsons, is a short questionnaire that will help physicians identify if pelvic pain could be coming from the bladder.

Technological advances in telecommunications and information technology, coupled with state-of-the-art microchip, RFID ( Radio Frequency Identification ), and inexpensive intelligent beacon sensing technologies, have enhanced the technical capabilities that will facilitate motorist safety benefits for intelligent transportation systems globally.

; Frequency response ( Fs ): This measurement tells you over what frequency range output level for an audio component will remain reasonably constant ( either within a specified decibel range, or no more than a certain number of dB from the amplitude at 1kHz ).

Frequency of emptying will depend on the speed of the decomposition process and capacity, from a few months ( active hot composting ) to years ( passive, cold composting ).

That transition canceled the SFN ( Single Frequency Network ) with the Stuttgart region ( New frequencies will be in place on Nov. 11th, 2008, due to a new TV master plan for Europe ).

Rarely, an airport will have Mandatory Frequency Area rules, but no ground station.

Retailers who use other types of loss-prevention systems than AM or 8. 2 MHz Radio Frequency systems will not be as affected by " tag pollution ".

* Communication Systems Operator: Communication Systems Operator training is a 25 week course that will ensure that trainees will be instructed in the operation and maintenance of military High Frequency ( HF ) and Very High Frequency ( VHF ) radios, portable satellite terminals, frequency hopping and cryptographic equipment.

The result of these two factors is that the usable spectrum shifts towards the lower frequencies and into the Medium Frequency ( MF ) range during winter nights, while on a day in full summer the higher frequencies tend to be more usable, often into the lower VHF range.

Frequency compensation is implemented to avoid this result.

He also found time to work again with Warren Ellis, creating 14 covers for the critically acclaimed Wildstorm series Global Frequency.

* Some equipment in particle accelerators such as Radio Frequency Quadrupoles ( RFQs ) or electron targets use copper MMC compounds such as Glidcop to retain the material properties of copper at high temperatures and radiation levels.

The clocks are compared using GPS signals and Two-Way Satellite Time and Frequency Transfer.

: which is of the form suggested the previous year by M. J. Buckingham in Very High Frequency Absorption in Superconductors based on the fact that the superconducting phase transition is second order, that the superconducting phase has a mass gap and on Blevins, Gordy and Fairbank's experimental results the previous year on the absorption of millimeter waves by superconducting tin.

* The Natural Period of a Transmission Line and the Frequency of lightning Discharge Therefrom, The Electrical World, August 27, 1898.

Frequency domain analysis is also called spectrum-or spectral analysis.

* Frequency: in Europe, in China, in Japan, in Latin America and in the US and Canada, and products may NOT be used in the UK or Ireland as they cause and suffer from interference with the UK and Ireland cellular networks with illegal use of such products being prohibited by UK agencies, and UK and Ireland DECT and products may NOT be used in the US and Canada as they cause and suffer from interference with US and Canada cellular networks and aircraft and for that reason is deemed illegal to use by US and Canadian agencies such as the Federal Communication Commission and Industry Canada.

* E. Rubiola, Phase Noise and Frequency Stability in Oscillators Cambridge University Press, 2008.

* Tutorial on Precision Frequency Generation.

Frequency responses are shown for the Butterworth, Chebyshev, inverse Chebyshev, and elliptic filters.

*< cite id = refMark1958 > W Markowitz, R G Hall, L Essen, J V L Parry ( 1958 ), " Frequency of cesium in terms of ephemeris time ", Physical Review Letters, vol. 1 ( 1958 ), 105 – 107 .</ cite >

Frequency is the number of occurrences of a repeating event per unit time.

Frequency counters can currently cover the range up to about 100 GHz.

Frequency modulation is also used in telemetry, radar, seismic prospecting and newborn EEG seizure monitoring.

Frequency modulation is known as phase modulation when the carrier phase modulation is the time integral of the FM signal.

Dispersion ( water waves ) | Frequency dispersion in groups of gravity wave s on the surface of deep water.

The members of the task group were not able to come to an agreement choosing between two technology proposals, Multi-band Orthogonal Frequency Division Multiplexing ( MB-OFDM ) and Direct Sequence UWB ( DS-UWB ), on the table backed by two different industry alliances and was withdrawn in January 2006.

The first is through VLF ( Very Low Frequency ) radio waves launched into the magnetosphere.