Electronics (Mike Jaroch)

The method for transmitting and receiving still images. These images can be maps, photographs, and handwritten or printed text [17].

Any of the elements, quantities, or symbols that, when multiplied together, form a product [13].

Variations in signal strength by atmospheric conditions [101 [17].

The basic unit of capacitance. A capacitor has a capacitance of 1 farad when a voltage potential of 1 volt across it produces a charge of 1 coulomb [2].

The rotation of the plane of polarization of electromagnetic energy when it
passes a substance influenced by a magnetic field that has a component in the direction of propagation [11].

Differentiator circuit in the first video amplifier that allows only the leading edges of target returns, no matter how small or large, to be used [18].

The return of a portion of the output of a circuit to its input [8] [18].

A transmission line that carries energy to the antenna [10].

A horn radiator used to feed a reflector [18].

A synthetic type of insulation (fluorinated ethylene propylene) [4].

A powdered and compressed ferric oxide material that has both magnetic properties and light resistance to current flow [11].

A ferrite device that blocks the flow of energy through a waveguide by rotating the electric field 90 degrees. The rotated energy is then reflected or absorbed [11].

A highly magnetic material, such as iron, cobalt, nickel, or their alloys [1].

The cylindrical metallic ends of a cartridge fuse [3].

Conductors or optical waveguides that readily pass light [17].

An outer covering used to protect a conductor's insulating material. Commonly made from cotton, linen, silk, rayon, or fiberglass [4].

(1) The faithful reproduction of a signal. (2) The accuracy with which a system reproduces a signal at its output that faithfully maintains the essential characteristics of the input signal [7] [8] [12] [17].

The electromagnet which furnishes the magnetic field that interacts with the armature in motors and generators [5].

The creation of a steady magnetic field within the field windings by the
application of a dc voltage either from the generator itself or from an external source [5].

A term used to describe the total force exerted by an action-at-a-distance
phenomenon such as gravity upon matter, electric charges acting upon electric charges, and magnetic forces acting upon other magnets or magnetic materials [1].

A transistor consisting of a source, a gate, and a drain. Current flow is controlled by the transverse electric field under the gate [7].

The cathode of a thermionic tube, usually a wire or ribbon, which is heated by current passing through it [6].

Conductive or nonconductive material deposited on a glass or ceramic substrate. Used for passive circuit components, resistors, and capacitors [14].

A selective network of resistors, capacitors, and inductors that offers comparatively little opposition to certain frequencies, while blocking or attenuating other frequencies [6] [9].

The final stage of amplification in a transmitter [12].

See MIXER [18].

A constant value of bias voltage [6] [7] [13].

A resistor having a definite resistance value that cannot be adjusted [1].

A device used to discharge the pulse-forming network. A trigger pulse ionizes the air between two contacts to initiate the discharge [12].

A transmission line that has no standing waves. This line requires no special timing devices to transfer maximum power [10].

An IC package [14].

An earlier name for a diode, or a two-electrode vacuum tube used as a detector [6].

A line made with an inner conductor that consists of flexible wire insulated from the outer conductor by a solid, continuous insulating material [10].

A monolithic IC packaging technique that eliminates the need for bonding wires [14].

A device having two stable states and two input terminals (or types of input signals), each of which corresponds with one of the two states. The circuit remains in either state until caused to change to the other state by application of a voltage pulse. A similar bistable device with an input that allows it
to act as a single-stage binary counter [13].

(1) In electrical or electromagnetic devices, a general term used to designate collectively all the electric or magnetic lines of force in a region [1]. (2) A solution that removes surface oxides from metals being soldered [2] [14].

The number of magnetic lines of force passing through a given area [1].

The ability of a resonant circuit to operate continuously because of stored energy or energy pulses [9].

An electrode of a CRT that is used to focus the electrons into a tight beam [6].

An ordinary half-wave antenna (dipole) that has one or more additional conductors connected across the ends parallel to each other [10].

The energy band in an atom lying between the conduction band and the valence band. Electrons are never found in the forbidden band but may travel back and forth through it. The forbidden band determines whether a solid material will act as a conductor, a semi-conductor, or an insulator [7].

The type of AGC that causes an amplifier to be driven towards saturation [17].

An external voltage that is applied to a PN junction in the conducting direction so that the junction offers only minimum resistance to the flow of current. Conduction is accomplished by majority current carriers (holes in P-type material; electrons in N-type material) [7] [13] [14].

The smaller resistance value observed when you are checking the resistance
of a semiconductor [16].

A circuit that uses a double-tuned RF transformer to convert frequency variations in the received FM signal to amplitude variations. Also known as a phase-shift discriminator [12].

An antenna array with three parasitic elements and one driven element [10].

The process of synchronizing a facsimile receiver to a transmitter. This allows proper picture reproduction [17].

Those electrons that can be moved by an externally applied voltage [7].

The loss of energy of radio waves caused by the spreading of the wavefront as it travels from the transmitter [10].

(1) The number of complete cycles per second existing in any form of wave motion, such as the number of cycles per second of an alternating current [2] [10]. (2) The rate at which the vector that generates a sine wave rotates [12].

Circuit modification used to improve or broaden the linearity of its frequency response [18].

The frequency at which the filter circuit changes from an action of rejecting the unwanted frequencies to an action of passing the desired frequencies. Conversely, the point at which the filter circuit changes from an action in which it passes the desired frequencies to an action in which it rejects the undesired frequencies [9].

The amount the frequency varies from the carrier frequency [12].

Transmitting (and receiving) of radio waves on two different frequencies
simultaneously [10].

A meter used to measure the frequency of an ac signal [3] [16].

changes, and the frequency of the modulating signal determines how fast the frequency changes [12].

Special RF power amplifiers that multiply the input frequency [12].

Special RF power amplifiers that multiply the input frequency [12].The measure of a servo's ability to respond to various input frequencies [15].

Varying the output frequency to achieve electronic scanning [18].

In a radar, the entire range of frequencies contained in an RF pulse or signal
[18].

Refers to the ability of an oscillator to accurately maintain its operating
frequency [9].

A process that uses hetrodyning and frequency selection to produce a signal
[17].

(1) A frequency source of high accuracy [17]. (2) A bank of oscillators in which the outputs can be mixed in various combinations to produce a wide range of frequencies [18].

A circuit that provides the desired response (maximum or minimum impedance) at a specific frequency [8].

Multiplexing that transmits and receives the full 360 degrees of each sine wave [17].

A curve showing the output of an amplifier (or any other device) in terms of voltage or current plotted against frequency with a fixed-amplitude input signal [8].

Frequency modulation somewhat similar to continuous-wave (cw) keying in AM transmitters. The carrier is shifted between two differing frequencies by opening and closing a key [12].

The ratio of the energy radiated in the principal direction compared to the
energy radiated in the opposite direction [10].

A circuit that uses both positive and negative alternations in an alternating
current to produce direct current [6] [7].

Consists of two half-wave voltage rectifiers and is used to reduce the output ripple amplitude [7].

A specific purpose of an entity; its characteristic action [13].

The basic frequency or first harmonic frequency [10].

See ALLOYED-JUNCTION [7].