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Monday, 29 April 2024, 6:09 PM
Site: edulabs.org academy
Course: Activity Examples (Activity Examples)
Glossary: Electronics (Mike Jaroch)
S

SPACE DIVERSITY

Reception of radio waves by two or more antennas spaced some distance apart
[10].

SPACE WAVE

Radio waves that travel directly from the transmitter to the receiver and remain in the troposphere [10].

SPACING

The condition in teletypewriter operation where a circuit is open and no current flows [17].

SPARK-GAP MODULATOR

A modulator that consists of a circuit for storing energy, a circuit for rapidly discharging the storage circuit (spark gap), a pulse transformer, and a power source [12].

SPECIFIC GRAVITY

The ratio between the density of a substance and that of pure water at a given
temperature [1].

SPECIFIC RESISTANCE

The resistance measured in ohms of a unit volume of a substance to the flow
of electric current. (The unit volume used is generally the circular mil-foot.) [4]

SPECTRUM

(1) The entire range of electromagnetic waves arranged in order of their frequencies. (2) The range of frequencies considered in a system [10].

SPECTRUM ANALYSIS

The display of electromagnetic energy arranged according to wavelength or
frequency [12].

SPECTRUM ANALYZER

A test instrument that provides a visual display of the frequency distribution
of an RF signal such as a transmitter output [18].

SPETE

Test equipment that is specifically designed to generate, modify, or measure a range of electronic functions of a specific or peculiar nature on a single system or equipment [16].