University of TechnologyDepartm ent of Electrical Engineering

Final Examinati on 2A12-2413Subject: History of Communication Eng. Year: lst

Division: Communication Engineering Time: 3 HrExaminer: Dr. Jabbar K. Mohammed Dste: / /2013

ANSWERS

OI / ANSWER

1- 36000 km

2- Geostationarv earth orbit (GEO) , Iow earth orbit (LEO) ,

medium erth orbit (MEO)

3- International Telecommunication Satellite, 3 regions

4-AM,FM5- 30-300Nft12

6- Alexander Graham Bell , Samuel Morse

7- Sound wave into electrical wave

02 / ANSWER

Basic Concept of The Contact

1. Contact generally is the process of transferring or converting information

from one point called the source To another point called destination

Destination , And there are several types of communication methods, such

as: Contact between the one person and the other as in the case of the

phone.

2. Contact between the person and the machine as in cases of control and

operation of the machines by voice or in cases of communication with

robots.

3. Contact between the person and the animal as in the case of addressing

individual with cats and dogs

4. Communication between the machine and the other as in the case ofcommunication between computers.

6. There is another type of communication is to connect to a spiritual like

the individual of his Creator

Q3 / Define the following terms. ( five only) : (25 marks)

l-Marconi Guglielmo Marconi was born in Bologna, Italy, on April 25,1874,

to an Italian father and Irish mother. Educated in physics at the

technical school, by the age of 20, Marconi had become very

interested in the works of HeinrichHerz, who had discovered

and first produced radio waves in 1888. Marconi became

convinced that communication among people was possible via

wireless radio signaling

2- Communication Science : is defined as the exchanged of infiormation and

reliably between the two sides at least . and mallV

consists ofthree sections sender,receiver and

channel of communication

3- Telegraph : is a device that uses electrical signals, usually conveyed via

telecommunication lines or radio to connect the end points .

4- The Internet : the intemet is a worldwide system of interconnected

computer networks that use the TCP/IP set of network

protocol to reach billions of users.the internet begn as a U.S

Department of Defense network to link scientists and

university professors around the world.

5- Radio Wave : are electromagnetic waves that travel through vasuum . like

visible light , infrared , ultraviolet , X- rays and gafilma rays

6- Military Satellite : These satellites are often used for gathering intelligence,

as a communications satellite used for military purposes,

or as a military weapon

Q4: A/ Give the year for each of the fotlowing important events ( five only)

(15 marks).

1- t9622- t9573- t8374- 1996

- -5-'1976 " ,,

6- 1981

7- 1965

04 /B: ANSWER

l. Weather forecasting

2. Radio and TV broadcast

3. Military satellite

4. Navigation satellite

5. Global telephone

6. Connecting remote areas

7. Gtobal mobile communication