Pathway of signals.

Converts electrical signal.

One way communication or send information in one direction.

Undesired current or voltages.

Accepts transmitted signal.

Circuits that can transmit and receive signals.

Two-way communication but alternating direction.

Two-way communication or it can BOTH talk and listen.

Information to be sent.

Basic unit of data or Message used in digital communication.

Converts message into sequence of bits.

adds redundancy to facilitate error.

Maps the coded bits to be sent to the channel.

Process the imperfect bit.

Performs signal processing, produce bits to be feed to channel decoder.

Process estimated information bits to obtain an estimate of message.

Recipient of information.

it is the Process by which information is modified by the carrier.

High-frequency signal, sine-wave generated by an oscillator.

Original information or intelligence.

Process of putting the baseband signal directly to medium.

Sent upon the carrier.

is Fed to the modulator along with baseband signal.

Intelligence signal will be converted as

The number of cycles of a repetitive wave. Measured in cycles per second or Hertz

The distance of a wave occupied by one cycle. Usually expressed in meter or miles.

Speed of light

Total span of frequencies and wavelengths

Portion of electromagnetic spectrum occupied by a signal. Determines the maximum speed of date pulses. Expressed by Hertz.

Amplification of signal. – na dadagdag na mbps, positive.

Loss of power signal. – na bawas na mbps, negative.

Unit of measurement.

Inventor of telephone

Discovery of radio waves

Invention of transistor

Ethernet and first LANs