Transmission data is divided into two, namely analog and digital transmissions:
The analog signal is also referred to as broadband, is a wave - a wave of electronic continuously variable and is transmitted through a variety of media depending on its frequency. analog signals can be converted into a digital signal with the modulated first.
Also called a baseband digital signal, which contains ditransmidikan voltage pulse through wire media.
differences in these two types of signals are:
analog:
designed for voice (voice)
Not efficient for data
there are a lot of noise and error prone (errors)
relatively low speed
High overhead
any analog signal can be converted to digital form
Digital:
Designed for data and voice
discrete-level information
high speed
Low overhead
each digital signal can be converted to analog
The analog signal is a signal to display the analog data. Analog signals in the form of various kinds of electromagnetic waves is a direct, continuous and distributed via various transmission media. Analog data is data that implied by the physical size and has a value over a continuous - continuous in some interval. Analog data usually occupies a limited frequency spectrum. Examples of analog data is voice data, audio and video. human speech is found to have a frequency range between 100 Hz-kHz and 25 dB dynamic range.
The digital signal is a signal to display digital data. The digital data is data that has a row of different values and has its own characteristics. Examples of digital data is text, integers and characters - other characters. There are some errors in digital data. That the data in the form of character - an understandable human character can not be directly transmitted with ease in communication systems. Such data must be transmitted in binary form first. So the data is transmitted in the form of a row of bits.
Common problems of digital signal analog dn is:
Attenuation (Attenuation) increase in attenuation as a function of frequency
decrease in signal strength along with the distance function.
the return signal quality can be done in two ways, namely by an analog signal amplifier separately, repeaters for digital data.
Delay distortion occurs when different frequency components running at different speeds.
The fundamental problem is the effect of noise, due to heat (thermal) and interference
from the book: data communications, Dony Arius and Rum Andri KR, andi Publishers, 2003
The analog signal is also referred to as broadband, is a wave - a wave of electronic continuously variable and is transmitted through a variety of media depending on its frequency. analog signals can be converted into a digital signal with the modulated first.
Also called a baseband digital signal, which contains ditransmidikan voltage pulse through wire media.
differences in these two types of signals are:
analog:
designed for voice (voice)
Not efficient for data
there are a lot of noise and error prone (errors)
relatively low speed
High overhead
any analog signal can be converted to digital form
Digital:
Designed for data and voice
discrete-level information
high speed
Low overhead
each digital signal can be converted to analog
The analog signal is a signal to display the analog data. Analog signals in the form of various kinds of electromagnetic waves is a direct, continuous and distributed via various transmission media. Analog data is data that implied by the physical size and has a value over a continuous - continuous in some interval. Analog data usually occupies a limited frequency spectrum. Examples of analog data is voice data, audio and video. human speech is found to have a frequency range between 100 Hz-kHz and 25 dB dynamic range.
The digital signal is a signal to display digital data. The digital data is data that has a row of different values and has its own characteristics. Examples of digital data is text, integers and characters - other characters. There are some errors in digital data. That the data in the form of character - an understandable human character can not be directly transmitted with ease in communication systems. Such data must be transmitted in binary form first. So the data is transmitted in the form of a row of bits.
Common problems of digital signal analog dn is:
Attenuation (Attenuation) increase in attenuation as a function of frequency
decrease in signal strength along with the distance function.
the return signal quality can be done in two ways, namely by an analog signal amplifier separately, repeaters for digital data.
Delay distortion occurs when different frequency components running at different speeds.
The fundamental problem is the effect of noise, due to heat (thermal) and interference
from the book: data communications, Dony Arius and Rum Andri KR, andi Publishers, 2003
0 komentar:
Posting Komentar