BROADCASTING

MADE BY :- SOURABH KANT

BROADCASTING

• ANALOG CABLE T.V. TRANSMISSION

TELEVISION TRANSMISSION

• TERRESTRIAL TRANSMISSION.

• SATELLITE TRANSMISSION.

TERRESTRIAL TRANSMISSION

TERRESTRIAL TRANSMISSION is the transmission being made parallel to the ground

It’s frequency range is 40-70 MHz

One transmitting station could transmit the signal for only 100 Kmdiameter of clients

(Tx station)

SATELLITE TRANSMISSION

Satellite transmission involves an intermediate machine what we called as satellite.

It’s sole duty is receiving and transmitting.

The most popular orbit is the Geostationary orbit for the communication satellite .

Which is present at 35786 Km from the earth surface.

Only three satellites are used to cover the earth.

SATELLITE INFORMATION :-

A

B C

IMPORTANT FEATURES

Very large area of earth is visible from satellite (about 42%) Satellite offers communication with remote communities in sparsely

populated area

Satellite communication ignores political boundaries as well as geographical boundaries

Satellite provides communications with moving aircraft from ground control stations across the country

Satellite provides remote sensing i.e. Weather condition , oil field, water pollution etc.

SATELLITE LOCATION LAUNCH YEARINSAT 2A 74’ E 1992

INSAT 2B 93.5’ E 1993

INSAT 2C 93.5’ E 1995

INSAT 2D 74’ E 1997

INSAT 2E 83’ E 1995

INSAT 3B 83’ E 2000

INSAT 3C 74’ E 2002

INSAT 3A 93.5’ E 2003

INSAT 3D 93.5’ E 2003

INSAT 3E 55’ E 2003

GSAT 1 48’ E 2001

GSAT 2 48’ E 2003

GSAT 3 74’ E 2004

GSAT 4 48’ E 2006

UP

LIN

K

DOWN LINK

SATELLITE

UPLINK

UPLINK is the process of sending the signal from the main station to the satellite

SOURCEANALOG TO DIGITAL

CONVERTERMODULATION

FDMPOWER

AMPLIFIER

5.9 TO 6.2 GHzTO SATELLITE

LNB DETAILS

ANTENNAMICROWAVE AMPLIFIER

LOCAL OSCILLATOR

IF

LNB is connected at the receiving satellite dish.

LNB is used just to convert incoming RF input to IF (intermediate frequency)

An Over View of S, C, Ku, & Ka Band Frequencies

BAND DESIGNATION DOWNLINK FREQ(GHz) UP-LINK FREQ (GHz)

S BAND 2.555 to 2.635 5.855 to 5.935

EXTENDED C

BAND(LOWER)3.4 to 3.7 5.725 to 5.925

C BAND 3.7 to 4.2 5.925 to 6.425

EXTENDED C

BAND(UPPER)4.5 to 4.8 6.425 to 7.075

Ku BAND 10.7 to 13.25 12.75 to 14.25

Ka BAND 18.3 to 22.20 27.0 to 31.00

THANK YOU