Free Powerpoint Presentations

Telecommunications
Page
1

DOWNLOAD

PREVIEW

WATCH ALL SLIDES

Slide 1

Telecom

Telecom

Slide 2

TELECOM

TELECOM

SPEED OF SOUND WAVES

340 m/s in air

Slide 3

TELECOM

TELECOM

EQUATIONS

v= f l v = d /t

Slide 4

TELECOM

TELECOM

Frequency = the number of waves per second

Measured in Hertz (HZ)

Slide 5

TELECOM

TELECOM

CARRIER WAVE –THIS TELLS YOU THE RADIO STATION

AUDIO WAVE TELLS YOU WHAT IS ON THE STATION

Slide 6

TELECOM

TELECOM

AMPLITUDE MODULATED (AM) WAVE –A COMBINATION OF THE CARRIER AND AUDIO WAVE

Slide 7

TELECOM

TELECOM

PARTS OF THE RADIO

1. AERIAL - PICKS UP ALL SIGNALS

2. TUNER – SELECTS ONE PARTICULAR SIGNAL

Slide 8

TELECOM

TELECOM

3. DECODER – SEPARATES CARRIER WAVE FROM AUDIO WAVE

4. AMPLIFIER – MAKES BIGGER COPY OF AUDIO WAVE

Slide 9

TELECOM

TELECOM

5. BATTERY – SUPPLIES ENERGY TO AMPLIFIER

6. LOUDSPEAKER – CHANGES ELECTRICAL ENERGY TO SOUND ENERGY

Slide 10

TELECOM

TELECOM

COLOUR MIXING

3 PRIMARY COLOURS – RED , GREEN , BLUE TOGETHER MAKE WHITE

Slide 11

TELECOM

TELECOM

RED AND GREEN GIVE YELLOW.

RED AND BLUE GIVE MAGENTA

GREEN AND BLUE GIVE CYAN

Slide 12

TELECOM

TELECOM

GEOSTATIONARY SATELLITES ARE AT A HEIGHT OF 36 , 000Km ABOVE THE EARTH

THEY HAVE A 24 HR ORBIT

Slide 13

TELECOM

TELECOM

SIGNALS ARE MICROWAVE AND TRAVEL IN A STRAIGHT LINE TO AND FROM THE SATELLITE.THEY CANNOT CURVE IN THE EARTH`S ATMOSPHERE

Slide 14

TELECOM

TELECOM

OPTICAL FIBRES USED TO CARRY INFORMATION BY TOTAL INTERNAL REFLECTION. LIGHT TRAVELS AT A SPEED OF 200 , 000 , 000 M/S

Slide 15

Electricity

Electricity

EQUATIONS

Q = I x T V = I x R

P = I x V P = E / t

P = V2 / R P = I2R

RT = R1 + R2

1 /RT = 1/R1 + 1/R2

Go to page:
 1  2 

Contents

Last added presentations

© 2010-2024 powerpoint presentations