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Enterprise Control System

Glossary

Please take time to view our Glossary of Terms and Abbreviations - we hope you will find the information useful.

 
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D-ENG

Digital Electronic News Gathering


DAB

Digital Audio Broadcasting


Data Stream

In telecommunications and computing, a data stream is a sequence of digitally encoded coherent signals used to transmit or receive information that is in transmission.


dB

Decibel (ratio in log scale)


dBc

Decibel relative to main signal power


dBi

dB(isotropic) The forward gain of an antenna compared with the hypothetical isotropic antenna which uniformly distributes energy in all directions. Linear polarisation of the EM field is assumed unless noted otherwise.


dBm

Decibel relative to 1 milliwatt


DC

Direct Current (0 Hz)


DCD

Data Carrier Detect - a control signal to the PC. The modem is receiving a valid carrier signal from the remote modem. AKA Received Line Signal Detect (RLSD).


DCE

Data Communication Equipment - this is normally a Modem


DDP

Declaration of Design and Performance


DDS

Direct Digital Synthesis


Discrete Fourier Transform

One of the specific forms of Fourier analysis.


DMT

Discrete Multi-Tone


Down Converted

The act of changing a signal frequency to a lesser value (ie GHz to MHz) without altering the data imposed on it.


DPSK

Differential Phase Shift Keying


DS-CDMA

Direct Sequence Code Division Multiple Access


DSBSC

Double Side Band Suppressed Carrier


DSP

Digital Signal Processing


DSR

Data Set Ready - a control signal to the PC. The Modem is ready to answer or originate a call - as opposed to being in a test mode.


DSSS

Direct Sequence Spread Spectrum


DTE

Data Terminal Equipment - normally a PC, VDU or data terminal


DTR

Data Terminal Ready - a control signal for the PC. The PC uses this to enable the modem: the modem is allowed to go on-line or answer a call.


DVB

Digital Video Broadcasting


DVB-C

Digital Video Broadcasting - Cable


DVB-S

Digital Video Broadcasting - Satellite


DVB-T

Digital Video Broadcasting - Terrestrial