See signal-to-noise ratio per bit.

Abbreviation for Emergency Broadcast System.

Abbreviation for Earth coverage, electronic commerce, exchange carrier.

Abbreviation forelectronic counter-countermeasures.

1. A wave that has been reflected by a discontinuity in the propagation medium.
2. A wave that has been reflected or otherwise returned with sufficient magnitude and delay to be perceived.
Note 1: Echoes are frequently measured in dB relative to the directly transmitted wave.
Note 2: Echoes may be desirable (as in radar) or undesirable (as in telephone… (Read More →)

See scattering cross section.

In a communication circuit (4- or 2-wire) in which the two directions of transmission can be separated from each other, the attenuation of echo signals that return to the input of the circuit under consideration.
Note: Echo attenuation is expressed as the ratio of the transmitted power to the received echo power in dB.

Seeecho suppressor.

In a system, the reduction of the power level of an echo or the elimination of an echo.
Note: Echo cancellation is usually an active process in which echo signals are measured and canceled or eliminated by combining an inverted signal with the echo signal.

A check to determine the integrity of transmission of data, whereby the received data are returned to the source for comparison with the originally transmitted data. Synonym loop check.