data transmission digital and analoge
TRANSCRIPT
Data Transmission Emdadul HaqueID: 151-19-1687
Some important term
Data Transmission Data transmission is the process of sending digital or analog data over a communication medium to one or more computing, network, communication or electronic devices.
Data Transmission
The successful transmission of data depends on two factors:
• quality of the signal being transmitted
• characteristics of the transmission medium
Quality of Signals
Signal Conversion• Analog Transmission
• Digital Transmission
Transmission Medium
Data transmission occurs between transmitter and receiver over some
transmission medium.
Communication is in the form of
electromagnetic waves.
Guided media twisted
pair, coaxial cable, optical fiber
Unguided media
(wireless)air,
vacuum, seawater
Transmission Processsending of a signal with limited duration, for example a block or packet of data, a phone call, or an email. Transmission technologies and schemes typically refer to physical layer protocols such as i. modulationii. demodulationiii. line codingiv. equalizationv. error controlvi. bit synchronizationvii. multiplexing
Some Problems during Transmission
• Attenuation signal strength falls off with distance over any transmission medium• Noiseunwanted signals inserted between transmitter and receiver• DistortionDistortion is the alteration of the original shape (or other characteristic) of a signal.
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