"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"
"S" to "Sec",
"Sel" to "Series pa",
"Series pe" to "Sho",
"Shu" to "Skip",
"Sky" to "Spe",
"Spi" to "Sta",
"Ste" to "Sw",
"Sx" to "Sz"
SAFETY FACTOR. The amount of a devices characteristic(s) which may be increased over and above the components normal operating rating with out causing damage to the device. In some respects a Safety Factor is the opposite of Component Derating.
SAMPLE RATE. The rate at which a signal is sampled. The frequency at which an analog signal is sampled, as in a Digital-to-Analog Converter. See D/A Converter manufacturers.
SAMPLING OSCILLOSCAPE. An oscilloscope that samples the measured signal and reconstructs it as a visual representation. All Oscilloscopes produced for the last few decades are Sampling Scopes.
SATELLITE. A radio relay station that orbits the earth. A complete satellite communications system also includes earth stations that communicate with each other via the satellite. The satellite receives a signal transmitted by an originating earth station and retransmits that signal to the destination earth station(s). Satellites are used to transmit telephone, television and data signals originated by common carriers, broadcasters and distributors of cable TV program material.
SATELLITE ECLIPSE. An eclipse where the rays of the sun do not reach the satellite. This prevents
recharging of the solar cells of the satellite and decreases the power to the transmitter.
SATELLITE-SUN CONJUNCTION. A period when the satellite and sun are close together and the noise
from the sun prevents or hampers communications.
SATURABLE-CORE REACTOR. A coil in which the reactance is controlled by changing the
permeability of the core.
SAW TOOTH. A waveform that appear like teeth on a saw. A Saw-Tooth waveform has a linear rise time and linear fall time.
SATURATION. The condition existing in any circuit in which an increase in the input signal produces
no further change in the output. The operating point of a vacuum tube or transistor at which a
further increase in grid or base current no longer produces an increase in plate or collector current. In a magnetic core, the condition in which a magnetic material has reached a maximum flux
density and the permeability has decreased to a value of approximately 1.
SCALING FACTOR. The term used to describe the use of unequal resistors in a servo’s summing
network to compensate for differences between input and output signal levels.
Schematic Diagram
SCHEMATIC. A diagram which shows, by means of graphic symbols, the electrical connections and functions of a specific circuit arrangement. Schematic Tools
SCHEMATIC SYMBOLS. A letter, abbreviation, or design used to represent specific characteristics or components on a schematic diagram.
| SCHMITT TRIGGER. An integrated circuit which has hystersis between an upper voltage limit and lower voltage limit and does not switch until one of those limits are reached. |
 Schmitt |
SCHOTTKY DIODE. A junction diode with the device junction formed between the semiconductor and a metal contact rather than between dissimilar semiconductor materials. Diode Manufacturers
SCR. Refer to Silicon Controlled Rectifier.
SCREEN GRID. A grid placed between a control grid and the plate and usually maintained at a fixed positive potential. Used with Vacuum tubes or CRTs.
SCREENING. Process of applying nonconductive or semiconductive materials to a substrate to form thick film components.
SECONDARY. The output coil of a transformer. Refer to Transformer Terms. Manufacturers of Transformers.
SECONDARY CELL. A cell that can be recharged by a current being passed through the cell in a direction opposite to the discharge current. Battery Manufacturers
SECONDARY EMISSION. The liberation of electrons from an element, other than the cathode, as a result of being struck by other high-velocity electrons.
SECONDARY LOOP. In a cooling system, the loop that transfers the heat from the heat source, such as electronic equipment, to the primary loop; usually distilled water.
SECOND DETECTOR (DEMODULATOR). The part of the receiver that separates the audio or video component from the modulated intermediate frequency.
Next set of "S" Terms and definitions
