A mass, or bonded masses, of conducting material that offer a negligible impedance to current flow.
Note: Equipotential ground planes may be in direct contact with the earth or may be physically isolated from the earth and suitably connected to it.

An implementation-defined relation between the values of MAC labels or of Information Labels. Two labels are equivalent if each of the labels dominates the other [POSIX.6].

A standard cross section of cable conductors for use in equating the metallic content of cable conductors of all gauges to a common base. [47 CFR Pt.36-A]

1. In a system, a network that may replace another network without altering the performance of the system.
2. A network with external characteristics that are identical to those of another network.
3. A theoretical representation of an actual network.

A quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by Rn = (Wn)/(kT0), where Wn is the spectral density, k is Boltzmann's constant, T0 is the standard noise temperature (290 K), and kT0 =
4. 00 × 10-21 watt-seconds.
Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e2, within a… (Read More →)

The temperature, usually expressed in kelvins, of a hypothetical matched resistance at the input of an assumed noiseless device, such as a noiseless amplifier, that would account for the measured output noise. [From Weik '89]

The product of sheath kilometers and the number of equivalent gauge pairs of conductors in a cable. [47 CFR Pt.36-A]

The amount of thermal noise power on a frequency-division multiplexed (FDM) or wire channel necessary to approximate the same judgment of speech quality created by quantizing noise in a PCM channel.
Note 1: The speech quality judgment is based on comparative tests.
Note 2: Generally,
3
3. 5 dBrnC ±
2. 5 dB is considered the approximate equivalent PCM noise… (Read More →)

The noise temperature referred to the output of the receiving antenna of the Earth station corresponding to the radio-frequency noise power which produces the total observed noise at the output of the satellite link excluding noise due to interference coming from satellite links using other satellites and from terrestrial systems. [NTIA] [RR]

The product of (a) the length of a section of cable in kilometers (sheath kilometers) and (b) the ratio of the metallic content applicable to a particular group of conductors in the cable (e.g., conductors assigned to a category) to the metallic content of all conductors in the cable. [47 CFR Pt.36-A]