Chapter -1 Fiber optics Er.Rashmi.

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Presentation transcript:

Chapter -1 Fiber optics Er.Rashmi

Concepts of Analog and digital Signal

Example of Digital signal Digital signals are commonly referred to as square wave or clock signals Their minimum value must be 0 volts and their maximum value must be 5 volts. They can be periodic (repeating) or non-periodic The time the signal is high (ts) can vary anywhere from 1% of the period to 99% of the period

Multiplexing what is multiplexing?

Types of multiplexing TDM (TIME division multiplexing) FDM (Frequency division mux) WDM (Wavelength division mux)

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FDM

DIGITAL COMMUNICATION BY Er. Vishal Dheer. FDMA OVERVIEW 7/5/2019 DIGITAL COMMUNICATION BY Er. Vishal Dheer.

WDM

What is modulation?

Modulation Formats RZ (Return to zero) NRZ (Non-return to zero)

1110011010011

Consider data 010110 and make NRZ and RZ format.