DRAKE 4000 series II Guia do Utilizador descarregar pdf (Página 4)

4000 Series II - EASi-COM II User Guide

STA0309 - Issue 2.0 Page iii of x

GLOSSARY OF TERMS

ADC An

nalogue to

igital

onverter samples the voltage level of an

electrical input and assigns a digital value to it (a series of 1s and

0s).

ADM

ssignment,

iagnostics and

onitoring.

The CMAPSi package comprises two elements - an offline section

for configuring a Drake matrix and an online section for real time

monitoring and making 'on the fly' changes. ADM is the online sec-

tion of the package.

BNC Standard co-axial video connector.

A type of connector used with coaxial cables such as the RG-58 A/

U cable used with the 10Base-2 Ethernet system. The basic BNC

connector is a male type mounted at each end of a cable. This con-

nector has a centre pin connected to the centre cable conductor

and a metal tube connected to the outer cable shield. A rotating ring

outside the tube locks the cable to any female connector.

CODEC

A Co

der/

Dec

oder is a device that encodes or decodes a signal. For

example, telephone companies use CODECs to convert binary sig-

nals transmitted on their digital networks to analogue signals con-

verted on their analogue networks.

CMAPSi

onfiguration and

aster

ssignment

rogramming

ystem

nte-

grated is software produced by Drake Electronics, used for config-

uring, controlling and monitoring their 3000, 4000 and 4000 series II

range of matrices.

Conference A facility (configured by CMAPSi), similar to older Party Line sys-

tems.

CSU The

entral

witching

nit is the central element of the Drake talk-

back system (responsible for the actual routing of audio), the CSU

is normally a 19 inch rack mounting unit. The CSU is sometimes

also referred to as the 'matrix'.

DAC A

igital to

nalogue

onverter generates an output voltage pro-

portional to the value entered on its digital inputs (as a series of 1s

and 0s).

DAK

irect

ccess

ey is a Drake term used to indicate a push key on a

control panel which, when pressed, will generate an audio route (or

routes), hence providing 'direct access' to a destination.

dB The

decibel

(abbreviated as dB, and also as db and DB) is a com-

mon unit of measurement for the relative loudness of a sound or, in

electronics, for the relative difference between two power levels. A

decibel is one-tenth of a “Bel”, a seldom-used unit named after

Alexander Graham Bell, inventor of the telephone. In sound, the dif-

ference between two sound levels is ten times the common loga-

rithm of the ratio of their power levels.

1 2 3 4 5 6 7 8 9 ... 30 31

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