"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous set of "R" Terms
RESONANCE. The condition in a circuit containing inductance and capacitance in which the inductive
reactance is equal and opposite to the capacitive reactance. This condition occurs at only one frequency
and the circuit in that condition is said to be in resonance. Resonance of a system exists when any change in the forcing frequency results in an extremely large vibration output. Resonance of a system also occurs when the
forcing frequency equals the natural frequency.
RESONANT CIRCUIT. A circuit that contains both inductance and capacitance and is resonant at one
frequency (XL = XC).
RESONANT FREQUENCY. The natural frequency of an oscillator. That frequency in a given resonant circuit at which the inductive and
capacitive reactance values are equal and cancel each other.
RESONANT LINE. A transmission line that has standing waves of current and voltage.
RESONATOR. A device designed to oscillate near it's own frequency. Also refer to Manufacturers of Resonators
REST FREQUENCY. The carrier frequency during the constant-amplitude portions of a phase
modulation signal.
REST TIME (RT). The time when there is no pulse; nonpulse time.
RESULTANT MAGNETIC FIELD. The magnetic field produced in a synchro by the combined effects
of the three stator magnetic fields. [Synchro Definition]
RETENTIVITY. The ability of a material to retain its magnetism.
REVERBERATION. The multiple reflections of sound waves.
REVERSE AGC. The type of AGC that causes an amplifier to be driven toward cut-off.
REVERSE BIAS. An external voltage applied to a diode or semiconductor junction to reduce the flow of
electrons across the junction. Also called BACK BIAS.
| RF RADIATION HAZARD. A health hazard caused by exposure to electromagnetic radiation or high energy particles (ions). Also just called RADHAZ. The FCC’s limits for maximum permissible exposure [MPE] to RF emissions depend on the frequency or frequencies that a person is exposed to. Different frequencies may have different MPE levels. Radar Definitions |
 |
RF (RADIO FREQUENCY) AMPLIFIER. An amplifier designed to amplify signals with frequencies between 10 kilohertz (10 kHz) and 100,000 megahertz (100,000 MHz).
RF Amplifier Circuit
RF (RADIO FREQUENCY) TRANSFORMER. A transformer specially designed for use with RF (radio frequencies). An RF transformer is wound onto a tube of nonmagnetic material and has a core of either powdered iron or air.
RGK. The symbol used to express the resistance between the grid and the cathode of an electron tube.
RHEOSTAT. A variable resistor used for the purpose of adjusting the current in a circuit.
RHO. Greek letter "rho" (.). Used in the field of electricity and electronics to represent the specific resistance of a substance.
Next set of "R" Definitions and terms
