MODEM

As we know computer can only understand digital signals and analog signals pass through the Medium. So there needs a converter and that is MODEM.

MODEM generally have two works.

1.Modulation

Digital->Modulation->Analog

2.Demodulation

Analog-> Demodulation->Analog

So lets talk about them in detail now.

Modulation

Modulation is the process of converting digital to analog in any form like Amplitude, Phase or Frequency.

E.g..

1. AM

It stands for Amplitude Modulation. Here digital signals are converted to analog signals and it is used in Radio.

2. FM

It stands for Frequency Modulation. And it is also used in Radio.

3.PM

It stands for Phase Modulation.

Demodulation

Demodulation is the process of converting analog signals from the Medium into digital form.

But nowadays we don't see use of modem in many of the places. It's because IC is doing the work of modem these days.

Such encoding and decoding can also be seen in fiber optic cable.

Electrical-> Light-> Electrical

For more information about telecommunication and data communication, visit my other blogs.