Transmission of 1. over long distances for 2. purposes, through 3. media or wirelessly
Components: • information source → transmits 4. to receivers • input transducer → transforms energy into electrical 5. • transmitter → produces radio waves from 6. •7. → carries messages • receiver → receives 8. waves • output transducer → transforms electrical signals into energy •9. → recipient
Transmission: • analogue → method that uses 10. signal produced by 11. particles • digital → analogue signal transformed into a series of 12. (discrete)
2. Write the correct term for these definitions.
1. A type of transmission that can easily be distorted by noise: 2. It is the final recipient of a transmission: 3. Wires, air, or space can carry the message: 4. It uses an antenna to produce radio waves: 5. It is the way in which telecommunication happens through electromagnetic waves: 6. It encodes and transmits the information to one or more receivers: 7. It converts radio waves into a usable form: 8. It converts physical energy into readable electrical signals:
3. Watch the video and complete the table.
Period of time: 40,000 years ago → Events in the history of telecommunications: Period of time: 1451 → Events in the history of telecommunications: Period of time: 1790s → Events in the history of telecommunications: Period of time: Around 1840 → Events in the history of telecommunications Period of time: 1876 → Events in the history of telecommunications: Period of time: 1880 → Events in the history of telecommunications: Period of time: 1940s → Events in the history of telecommunications: Period of time: From 1990s up to now → Events in the history of telecommunications: