Principles of Communication Mocktest (Prelims) BSIT 307

37問 • 1年前

問題一覧

is exchanging any type of message between a sender and receiver.

Communication

refers to communication that uses a transmitter, communication channel, and receiver. The message is called information, or an intelligence signal, in the form of an electronic signal.

Communication systems

The first step in sending a message is to convert it into an electronic form suitable for transmission.

Transmitter

It is the medium wherein an electronic signal is sent from one point to another.

Communication Channel

a material that conducts electricity and allows the flow of charge such metals and metal alloys. The channel can be as simple as a pair of wires that carry a voice signal from a microphone to a headset.

Electrical conductor

can be a fiber-optic cable or light pipe that carries the message on a light wave. These are used today to carry long-distance calls and all Internet communications.

Optical media

The resulting system is known as radio when free space is the channel. Radio is the term applied to any wireless communication from point to point.

Free space

Other communication channels are used in special communication systems such as sonar; water is used as the medium. L

Others

It is a set of electronic components and circuits that accept transmitted messages from the channel and translate them back, which humans understand.

Receiver

produce an increased version of the input signal.

Amplifiers

produce a continuous, repeated, and alternating waveform without input.

Oscillators

combine two or more electronic signals into one or two output signals.

Mixers

combine two or more electronic signals into one or two output signals.

Turned circuits

a circuit capable of amplifying specific frequencies while attenuating others.

Filters

This diagram consists of five (5) blocks that represent elements used in the system that go in what order?

Information Source, Transmitter, Channel, Receiver, and Destination.

Heinrich Hertz discovered _____ on _____?

Radio waves, 1887

Samuel Morse discovered _____ on _____?

Telegraph, 1837

The development and the first use of the Internet was done by whom and when?

Tim Burners-Lee, 1982-1990

The telephone was invented by whom and when?

Alexander Graham Bell, 1876

One-way or ____________ is considered the simplest way electronic communication is conducted.

Simplex communication

A ________ can be a full duplex or a half-duplex.

Duplex communication

communication is two-way, wherein people communicating can talk and listen simultaneously with devices that can send and receive signals simultaneously. Ex. Telephone

Full Duplex

communication is still a two-way communication, but the direction alternates, and the communicating parties take turns transmitting and receiving. Most military, fire, aircraft, and marine radio transmissions, and walkie talkies.

Half Duplex

It is a continuously varying voltage or current.

Analog Signal

Digital signals do not change continuously but vary in discrete increments compared to analog signals.

Digital Signal

is a single-frequency analog signal.

Sine Wave

It uses Morse code, a system for short (dots) and long (dashes) signals to represent letters and numbers.

Telegraph

Also known as radio telegraphy, a sine wave signal is turned off and on for short or long durations to represent the dots and dashes.

Continuos wave code

represent numbers, letters, or special symbols in computers transferred serially through a wire, radio, or optical medium.

Binary codes

ASCII stands for...?

American Standard Code for Information Interchange

it is an electromagnetic or electrical current representing the information or data it carries from the source it was produced to its destination;

Signal

It means amplification in a manner that if a signal is applied to a circuit, and its output has a greater amplitude than the input signal, then the circuit has gain

Gain

It is the loss fed by a circuit or component.

Attenuation

The message is called _____ or an intelligence signal, in the form of an electronic signal.

Information

Some electronic circuits, called ______, reduce the amplitude of a signal rather than increase it

stages

The gain or attenuation of a circuit is expressed in __________ which is a unit of measurement to express the hearing response of the human ear to sound levels. It is one-tenth of a bel.

Decibels

The frequency of electromagnetic waves is measured in cycles per second (cps) or ______

Hertz

The Contemporary World Mock test (Prelims)

Xai Alexandrei Delos Reyes · 58問 · 2年前

The Contemporary World Mock test (Prelims)