Electronics (Mike Jaroch)
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SPACE DIVERSITYReception of radio waves by two or more antennas spaced some distance apart [10]. | ||
SPACE WAVERadio waves that travel directly from the transmitter to the receiver and remain in the troposphere [10]. | ||
SPACINGThe condition in teletypewriter operation where a circuit is open and no current flows [17]. | ||
SPARK-GAP MODULATORA 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 GRAVITYThe ratio between the density of a substance and that of pure water at a given temperature [1]. | ||
SPECIFIC RESISTANCEThe 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 ANALYSISThe display of electromagnetic energy arranged according to wavelength or frequency [12]. | ||
SPECTRUM ANALYZERA test instrument that provides a visual display of the frequency distribution of an RF signal such as a transmitter output [18]. | ||
SPETETest 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]. | ||