1. The amount of transmitter power above that which is computed by the link designer as the minimum required to meet specified link performance.
Note: The rf power margin allows for uncertainties in (a) empirical components of the signal level prediction method, (b) terrain characteristics, (c) atmospheric conditions, and (d) equipment performance parameters.
2. At any given time in an… (Read More →)

Offering a high degree of electromagnetic shielding effectiveness.

Abbreviation for Request for Comments. The document series, begun in 1969, which describes the Internet suite of protocols and related experiments. Not all (in fact very few) RFCs describe Internet standards, but all Internet standards are written up as RFCs. [Bahorsky]

Abbreviation for radio frequency interference. See electromagnetic interference. Abbreviation for remote failure indication.

Residential Gateway

Abbreviation for red-green-blue. Pertaining to the use of three separate signals to carry the red, green, and blue components, respectively, of a color video image.
Note: The image is not NTSC-encoded; RGB typically results in higher resolution than that specified by the National Television Standards Committee.

A directional antenna that is composed of long-wire radiators that form the sides of a rhombus, the two halves of which are fed equally in opposite phase at one apex. [From Weik '89]
Note: A rhombic antenna is usually terminated at the apex opposite the driven apex, which termination makes its radiation pattern unidirectional. It is bidirectional if the opposite… (Read More →)

Abbreviation for routing indicator.

Recording Industry Association of America

1. Any cable constructed as a ribbon with parallel elements.
2. A fiber optic cable in which the optical fibers are held in grooves and laminated within a flat semirigid strip of material, such as plastic, that positions, holds, and protects them.
Note: Ribbon cables may be stacked to produce fiber optic cables with large numbers of fibers. Buffers, strength… (Read More →)