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Saturday, 25 October 2014


IDEX 2015

Enterprise Control Systems Ltd will be exhibiting at IDEX 2015 at the Abu Dhabi National Exhibition Centre, UAE from 22nd-26th Feb 2015.  Please visit us on Stand 05-C09, ADS Pavillion

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

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2G

Second Generation mobile phone system


3G

Third Generation mobile phone system


4G

Fourth Generation mobile phone system


A or Amp

Ampere


ABS

32-bit ABS encryption standard


AC

Alternating Current


Active Symbol Period

The period of a signal containing data excluding the GI


ACU

Antenna Control Unit


ADSL

Asymmetric Digital Subscriber Line


AES

Advanced Encryption Standard


AFDX

Avionics Full Duplex Ethernet


AGC

Automatic Gain Control


Algorithms

A finite list of well-defined instructions for accomplishing a task that, given an initial state, will produce through a well-defined series of successive states, eventually terminating in an end state.


Alpha

Path loss exponent (rate of path loss change with distance)


AM

Amplitude Modulation


APR

Access Point Repeater


ARS

Antenna Receiver Site


ASCII

American Standard Code for Information Interchange, a character encoding scheme


ASI

Asynchronous Serial Interface - this is a streaming format much like an MPEG Transport Stream MPEG-TS. It can contain a single program or be a multiplex of multiple programs, each consisting of video and audio. It is electrically identical to an SDI signal.


ASK

Amplitude Shift Keying


ATE

Automatic Test Equipment


AWG

American Wire Gauge


AWGN

Additive White Gaussian Noise


bar

Bars (pressure measurement)


BER

Bit Error Rate - In telecommunications, an error ratio is the ratio of the number of bits, elements, characters or blocks incorrectly received to the total number of bits, elements, characters or blocks sent during a specified time interval. The most commonly encountered ratio is the bit error ratio (BER) - sometimes referred to as the bit error rate.


Bias T

A device to enable a DC voltage to be applied to or extracted from a coaxial cable used to feed an antenna preamp or other line replacement unit using the coaxial feeder cable in addition to the RF signal as the DC supply cable.


Bit

Binary digit, taking the value of either 0 or 1


BNC

Bayonet Neill Concelman (type of connector)


Bps

Bits per second


BPSK

Binary Phased Shift Keying


C/N - CNR

Carrier to Noise Ratio. In decibels (dB), is specified as the ratio between the power in the carrier of the desired signal and the total received noise power


CCS

Command Centre Site


CCU

Communications Control Unit


CF

Crest Factor (peak to average power ratio of the RF envelope)


Channel Coding Information

Referring to the FEC, code and bit interleaving, the code is used to protect data sent even in the presence of noise.


Check

Compare against a specified standard


Chrominance

Video signal carrying colour image information


Codec

A device that transforms analog input into a digitally coded output and transforms digital signals to analog output


COFDM

Coded Orthogonal Frequency Division Multiplexing - is a digital multi-carrier modulation scheme which uses a large number of closely spaced orthogonal sub carriers. Each sub carrier is modulated with a conventional modulation scheme at a low symbol rate, maintaining data rates similar to conventional single carrier modulation schemes in the same bandwidth.


Composite

Composite video is the format of an analog television (picture only) signal before it is combined with a sound signal and modulated onto an RF carrier. In contrast to component video it contains all required video information including colours in a single line-level signal.


CTS

Clear to Send - A control signal to the PC. The remote host is ready to receive your input. The host (remote DTE) may drop this from time to time as it becomes busy.


CVBS

Composite Video Blanking Sync


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


EBNR

Energy per Bit to Noise Ratio


ECM

Electronic Counter Measures


ECS

Enterprise Control Systems Ltd


ECU

Encryption Control Unit


EIA

Electronics Telecommunications Union


EMC

Electromagnetic Compatibility


EOD

Explosive Ordnance Disposal


ESD

Electrostatic Sensitive Devices


Ether

The hypothesised medium that surrounds the earth.


ETS

European Telecommunications Standard


FDM

Frequency Division Multiplexing (FDM) is a form of signal multiplexing where multiple baseband signals are modulated on different frequency carrier waves and added together to create a composite signal.


FEC

Forward Error Correction - a system of error control for data whereby the transmitter adds redundant data to its messages enabling the receiver to detect and correct errors.


FFT

Fast Fourier Transformation - a fast algorithm for performing a discrete Fourier transform


FIR

Finite Impulse Response (digital filter)


FM

Frequency Modulation, analogue modulation technique


FMV

Full Motion Video


FP

Force Protection


FPGA

Field Programmable Gate Array


FSK

Frequency Shift Keying


GA

Genetic Algorithm


GHHC

Graphical Hand Held Controller


GHz

Gigahertz


GI

Guard Interval - a Guard Interval is used to ensure that distinct transmissions do not interfere with one another. The purpose of the GI is to introduce immunity to propagation delays, echoes and reflections, to which digital data is very sensitive.


GMSK

Gaussian Minimum Shift Keying


GND

Ground - the common signal ground connection. All other signals refer to this reference.


GPS

Global Positioning System


GSM

Global System for Mobile communications


GUI

Graphical User Interface


HD

High Definition


HDMI

High Definition Multimedia Interface is an interface for digital video


HDTV

High Definition Television


Hz

Base Unit of Frequency


IEC

International Electro technical Commission


IED

Improvised Explosive Device


IF

Intermediate Frequency, mixes frequencies up or down to other frequencies


IFFT

Inverse Fast Fourier Transformation


ILS

Integrated Logistics Support


IMD

Inter-Modulation Distortion


IP

Internet Protocol


IQ

Inphase Quadrature


ISO

International Standards Organisation


JPEG

Joint Photographic Experts Group


K

Kelvin


KBIT/S

Kilobits per second


Kbps

Kilobits per second


Kg

Kilograms


kHz

Kilohertz


Km

Kilometer


Lambda

RF Wavelength


LNA

Low Noise Amplifier


LO

Local Oscillator


LOS

Line of Site


LRM

Line Reflect Match


LRU

Line Replacement Unit


Luminance

A photometric measure of emitted light.


M

Megahertz SI unit of frequency


M3

3mm hole


MBIT/S

Megabits per second


MHz

Megahertz


mm

Millimeters


MPEG

Moving Picture Experts Group - this is a standard used primarily to compress audio and visual (AV) digital data.


MPEG-TS

Moving Picture Experts Group - Transport Stream


NF

Noise Figure


NLOS

Non Line of Sight


NMEA

National Marina Electronics Association


NTSC

National Television System Committee


NVG

Night Vision Goggles


OFDM

Orthogonal Frequency Division Multiplexing - a multicarrier modulation scheme using a large number of closely spaced orthogonal sub carriers. Each sub carrier is modulated with a conventional modulation scheme at a low symbol rate.


Orthogonal

At right angles


OSD

On Screen Display


PAL

Phase Alternating Line


PAPR

Peak to Average Power Ratio


PCM

Pulse Code Modulation - a technique used to digitise analogue signals


PLL

Phase Locked Loop


PM

Phase Modulation


PRS

Pseudo Random Sequence


PSK

Phase Shift Keying - this is a form of phase modulation which is accomplished by the use of a discrete number of states.


PSU

Power Supply Unit


QAM

Quadrature Amplitude Modulation - a modulation technique used to transmit digital signals


QPSK

Quadrature Phase Shift Keying - QPSK is a phase modulation algorithm. The carrier wave is modulated to encode bits of digital information in each phase change. QPSK refers to PSK with 4 states.


RADOK

Rapid Deployment Observation Kit


RCIED

Remotely Controlled Improvised Explosive Device


RCU

Remote Control Unit


RCV

Remote Controlled Vehicle


RF

Radio Frequency


RMS

Root Mean Squared


RS-232

RS-232 is a serial bi-directional asychronous interface for wired data transmission


RSSI

Received Signal Strength Indicator


RSVDS

Remote Static Video Downlink System


RTS

Request to Send - a control signal from the PC. The PC is ready to receive data. The PC may drop RTS from time to time as it spins its wheels - having to scroll text and other demanding tasks.


Rx

Receiver


RXD

Receive Data - the data signal to the PC. What the user sees from the remote host.


S-Video

Super Video


SA-PA

Orientation of Connector Keyways


SAR

Specific Absorption Rates


SCU

System Control Unit


SD

Standard Definition


SDI

Serial Digital Interface - an interface for digital video and audio transmission


SFN

Single Frequency Network


SI

International System of Units


SIR

Signal to Interference Ratio


SLA

Service Level Agreement


SMA

Sub Miniature Version A


SNR

Signal to Noise Ratio


Symbol

The smallest bit of data transmitted at one time.


Symbol Rate

The gross bit rate, inclusive of channel coding overhead, divided by the number of bits transmitted in each symbol.


TDM

Time Division Multiplexing


TDMA

Time Division Multiple Access


TS

Transport Stream


Tx

Transmitter


TXD

Transmit Data - The data signal from the PC, the data sent by the user.


UAV

Unmanned Aerial Vehicle


UHF

Ultra High Frequency


UMTS

Universal Mobile Telecommunications System


Up Converted

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


USB

Universal Serial Bus is a 4-pin connection for data transfer between devices


VAGC

Video Automatic Gain Controller


VDC

Voltage Direct Current


VHF

Very High Frequency


VLS

Video Link System - the facility to communicate real time Video/Audio/Data between two points.


W

Watt


WLAN

Wireless Local Area Network


WLL

Wireless Local Loop


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