Communication Systems on Pitara Kids Network

How Does Satellite TV Work?

Fri, 15 Aug 2003 20:18:50 +0000

Nine ‘o’ clock. It’s time for your favourite serial on television. Have you ever wondered how the same serial can be viewed by millions of people across the world?

This is possible because of satellite television technology. It uses man-made or artificial satellites to send your favourite serial to your television set. But why do we need satellites for this purpose?

How Does Satellite TV Work?

The earth is round

What is Ham Radio?

Sat, 04 Oct 2003 20:40:32 +0000

Consider this, your state has been hit by a cyclone with wind speeds measuring 300 kilometres per hour. All modern means of communication – telephone, cellphone, wireless sets – lie dead as the cyclone has destroyed all connecting stations and links.

This is what happened during the Orissa cyclone. All communication links broke down as dish antennas, radio stations, telephone lines, satellite links were destroyed.

There was no way people could contact the outside world. This was when a bunch of amateurs, students and radio enthusiasts got together to set up something called an amateur radio or ham radio station.

Internet in the Jungle

Wed, 04 Jul 2001 21:39:37 +0000

Why are you looking so sad?" Ullu, the wise old owl, asked Kabbu, the white pigeon.

“You too would look sad if you were going to lose your job,” snapped Kabbu.

Kabbu was the head of the Postal Department of their jungle Olango, which was the biggest and most prosperous jungle around. Kabbu and his fleet of 21 pigeons carried letters, parcels, money orders, postal orders, etc., from Olango to the other jungles and back. Their fleet was considered the smartest, fastest and easily the most efficient in all of Jungledom. Kabbu’s Postal Department had won several awards for the quality and the efficiency of its service.

How Did the Indian Postal Service Start?

Wed, 26 Dec 2001 16:41:07 +0000

Although methods of postal delivery varied from one country to another, it is believed that in India, Emperor Chandragupta Maurya who ruled the country between 321-297 BC, was the first to introduce a form of postal communication to dispatch confidential reports to distant posts in his empire.

However, the first recorded mention in history is to be found in the writings of historian Ziadduin Barni. He mentions that Ala-ud-din Khilji of the Delhi Sultanate, who ruled Delhi over 700 years ago, organized a regular horse and foot runner service called harakuras in 1296 AD. These runners carried a baton with bells and ran across the allotted territory with mail. Runners changed after each mile and the post was delivered in record time.