Philips SDV5120/12 Bedienungsanleitung PDF herunterladen (Seite 9)

9

English

EN

H

HDTV (High-Denition Television)

It is a digital television broadcasting system

with higher resolution than traditional

television systems (standard-denition TV,

or SDTV). HDTV is digitally broadcast;

the earliest implementations used analog

broadcasting, but today digital television

(DTV) signals are used, requiring less

bandwidth due to digital video compression.

U

UHF (Ultra high frequency)

In radio or TV broadcasting: it is the frequency

range of electromagnetic waves which lies

between 300 MHz and 3 GHz (3000 MHz).

V

VHF (Very high frequency)

In radio or TV broadcasting: it is the frequency

range of electromagnetic waves which lies

between 30 MHz and 300 MHz.

7 Glossary

A

Amplier

A device, either a single stage or a large scale

circuit with multiple stages for creating gain,

i.e. it makes small signals larger.

Antenna

A device, such as a rod or wire, which picks up

a received radio frequency signal or radiates a

transmitted RF signal.

C

Coaxial

A single copper conductor, surrounded with

a layer of insulation, covered by a surrounding

copper shield and nally, an insulating jacket.

An unbalanced transmission line with constant

impedance. In audio, this type is commonly

used for low level, line signals terminated in

RCA connectors.

D

DVB (Digital Video Broadcasting)

DVB is a suite of internationally accepted open

standards for digital television.

F

FM (Frequency Modulation)

In radio broadcasting: a method of modulation

in which the frequency of the carrier voltage

is varied with the frequency of the modulation

voltage.

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