The RF power margin allows for uncertainties in ( a ) empirical components of the signal level prediction method, ( b ) terrain characteristics, ( c ) atmospheric conditions, and ( d ) equipment performance parameters.

Another method is known as thermolysis, RF, shortwave or diathermy.

Galvanic and thermolysis are often combined in a method known as blend, developed by Arthur Hinkel in 1948, which uses both RF and direct current, combining many of the advantages of galvanic and thermolysis.

* http :// www. sigsam. org / bulletin / articles / 143 / tschirnhaus. pdf A translation ( by RF Green ) of his 1683 paper -- A method for removing all intermediate terms from a given equation.

However, this method may not be possible or even affordable until the year 2025 ( the Kanzius RF Therapy is scheduled to begin testing in 2012 but will be extremely difficult to acquire for many years ).

The RF plasma method has been used to synthesize different nanoparticle materials, for example synthesis of various ceramic nanoparticles such as oxides, carbours / carbides and nitrides of Ti and Si ( see Induction plasma technology ).

RF dielectric heating at intermediate frequencies, due to its greater penetration over microwave heating, shows greater promise than microwave systems as a method of very rapidly heating and uniformly preparing certain food items, and also killing parasites and pests in certain harvested crops.

* 3rd batter, # 25 Barry Bonds ( the Giants ' Left Fielder ; editor's note: yes, the scorekeeper was aware at the time that Bonds was playing left field, but accidentally put RF on his card ) strikes ( K ) on a 1-ball, 2-strike count ( the 1-3 notation was this particular scorekeeper's method of indicating that Bonds struck out " looking ", a practice the scorer has now become too lazy to continue ).

Note that the RF signal modulation is inverted compared to the conventional AM: the minimum video signal level corresponds to maximum carrier amplitude, and vice versa.

Drain efficiency is the ratio of output RF power to input DC power when primary input DC power has been fed to the drain of an FET.

Based on this definition, the drain efficiency cannot exceed 25 % for a class A amplifier that is supplied drain bias current through resistors ( because RF signal has its zero level at about 50 % of the input DC ).

In this case the RF zero level is near the DC rail and will swing both above and below the rail during operation.

Stability is a major concern in RF and microwave amplifiers.

The fact that in equivalent baseband models of communication systems, the signal spectrum consists of both negative and positive frequencies, can lead to confusion about bandwidth, since they are sometimes referred to only by the positive half, and one will occasionally see expressions such as, where is the total bandwidth ( i. e. the maximum passband bandwidth of the carrier-modulated RF signal and the minimum passband bandwidth of the physical passband channel ), and is the positive bandwidth ( the baseband bandwidth of the equivalent channel model ).

RAS, on the other hand, is a more primitive structure in the brainstem that is tightly in connection with reticular formation ( RF ).

Cable television is a system of distributing television programs to subscribers via radio frequency ( RF ) signals transmitted through coaxial cables or digital light pulses through hybrid fibre coaxial ( HFC ) networks.

A single class-B element is rarely found in practice, though it has been used for driving the loudspeaker in the early IBM Personal Computers with beeps, and it can be used in RF power amplifier where the distortion levels are less important.

The usual application for class-C amplifiers is in RF transmitters operating at a single fixed carrier frequency, where the distortion is controlled by a tuned load on the amplifier.

The radiative forcing capacity ( RF ) is the amount of energy per unit area, per unit time, absorbed by the greenhouse gas, that would otherwise be lost to space.

* simple remote: The Medtronic pumps offer an optional RF remote control that allows the user to deliver a discrete bolus or stop insulin delivery when the pump is concealed or inaccessible.

During this relaxation, a radio frequency signal ( electromagnetic radiation in the RF range ) is generated, which can be measured with receiver coils.

A plasma is struck in the gas mixture using an RF power source, which breaks the gas molecules into ions.

Modulation of a sine waveform is used to transform a baseband message signal into a passband signal, for example low-frequency audio signal into a radio-frequency signal ( RF signal ).

The resulting so called equivalent lowpass signal or equivalent baseband signal is a complex-valued representation of the real-valued modulated physical signal ( the so-called passband signal or RF signal ).

It is common for waves of electromagnetic ( light, RF ), acoustic ( sound ) or other energy to become superposed in their transmission medium.

When RA is clinically suspected, immunological studies are required, such as testing for the presence of rheumatoid factor ( RF, a non-specific antibody ).

A negative RF does not rule out RA ; rather, the arthritis is called seronegative.

RF is also seen in other illnesses, for example Sjögren's syndrome, Hepatitis C, chronic infections and in approximately 10 % of the healthy population, therefore the test is not very specific.

Like RF, these tests are positive in only a proportion ( 67 %) of all RA cases, but are rarely positive if RA is not present, giving it a specificity of around 95 %.

Additionally, newer set-top boxes that sit at the edge of IP-based distribution networks are often called net-top boxes or NTBs, to differentiate between IP and RF inputs.

Since later television designs include composite, S-Video, and component video jacks, which skip the modulation and demodulation steps, modulators are no longer included as standard equipment, and RF modulators are now largely a third-party product, purchased primarily to run newer equipment such as DVD players with an old television set.

The newer software defined radios use embedded high performance ADCs that provide higher dynamic range and are more resistant to noise and RF interference.

A fully capable Laserdisc playback rig included a newer Laserdisc player that is capable of playing digital tracks, had a digital optical output for digital PCM and DTS audio, would be aware of AC-3 audio tracks, and had an AC-3 coaxial output ; an external or internal AC-3 RF demodulator and AC-3 decoder ; and a DTS decoder.

On certain releases, one of the analog tracks is used to carry a modulated AC-3 signal for 5. 1 channel audio ( for decoding and playback by newer LD players with an " AC-3 RF " output ).

The 1983 revision of the Atari 5200 has two controller ports instead of four, and a change back to the more conventional separate power supply and standard non-autoswitching RF switch.

Despite this opinion among researchers, evidence has accumulated that supports the existence of complex biological effects of weaker non-thermal electromagnetic fields, ( including weak ELF magnetic fields, although the latter does not strictly qualify as EM radiation < ref >), and modulated RF and microwave fields.

For a transmitter, the attack-time delay is defined as the interval from the instant the transmitter is keyed-on to the instant the transmitted RF signal amplitude has increased to a specified level, usually 90 % of its key-on steady-state value.

In telecommunication, the term RF power margin has the following meanings:

Reflected power has three main implications in radio transmitters: Radio Frequency ( RF ) energy losses increase, distortion on transmitter due to reflected power from load and damage to the transmitter can occur.

In telecommunication, transmit-after-receive time delay is the time interval from removal of RF energy at the local receiver input until the local transmitter is automatically keyed on and the transmitted rf signal amplitude has increased to 90 % of its steady-state value.

* When conducted by an ordinary electric cable, RF current has a tendency to reflect from discontinuities in the cable such as connectors and travel back down the cable toward the source, causing a condition called standing waves, so RF current must be carried by specialized types of cable called transmission line.

Note that the top slice has not been internally sprayed for RF shielding

The BNC was originally designed for military use and has gained wide acceptance in video and RF applications to 2 GHz.

Research activity in the area of radio-frequency ( RF ) circuit design has surged in the last decade in direct response to the enormous market demand for inexpensive, high-data-rate wireless transceivers.

This has two main advantages: driving the RF field takes a fraction of the energy ( allowing lighter-weight batteries for portable units ), and faster sampling as the electron-proton coupling can happen even as measurements are being taken.

Radio frequency ( RF ) energy has been used in medical treatments for over 75 years generally for minimally invasive surgeries and coagulation, including the treatment of sleep apnea.

Since this RF emission is easily obtained from the ground and EUV flux is not, this value has been measured and disseminated continuously since 1947.

Located just southwest of Alexandria, Franconia has existed as a community since the 1870s, when a station by that name opened on the RF & P Railroad ; however, like most of the surrounding area, it only began to develop into its present, suburban form in the 1950s.

Almost all modern video equipment has at least composite connectors, so this typically is not a problem ; however, older video equipment and some very low-end modern televisions have only RF input ( essentially the antenna jack ); while RF modulators are no longer common, they are still widely available to translate baseband signals for older equipment.

The jack has a small area between the outer and inner rings which is filled with an insulator, typically plastic ( very early versions, or those made for use as RF connectors used ceramic ).

As with many other connectors, the RCA has been adopted for other uses than originally intended, including as a power connector, an RF connector, and as a connector for loudspeaker cables.

* The RF link has greater range and is omnidirectional.

After the RF energy has been extracted from the electron beam, the beam is destroyed in a collector.

The first has a Nintendo AV Multi-Out port ( the same one built on the Super NES, Nintendo 64, and GameCube ) that replaces the RF jack completely.