Amplitude Modulation of Decimeter Waves

The Amplitude Modulation Using UHF Waves Experiment is designed to study the transmission of audio-frequency signals using amplitude-modulated (AM) decimeter waves. The experiment demonstrates how an audio signal can be superimposed onto a high-frequency carrier wave and transmitted through space. It provides a practical understanding of analog communication systems, signal modulation, and wireless transmission principles. Manufactured by Atico Export India.

Principle

Amplitude modulation (AM) is a communication technique in which the amplitude of a high-frequency carrier wave is varied according to the instantaneous amplitude of an audio-frequency signal while the carrier frequency remains constant. In this experiment, an audio signal generated by a function generator modulates a UHF carrier signal. The transmitted amplitude-modulated signal can then be observed and analyzed to study the principles of analog wireless communication.

Objectives

• Study the principle of amplitude modulation (AM).
• Transmit audio-frequency signals using UHF carrier waves.
• Understand the modulation of a high-frequency carrier by an audio signal.
• Analyze analog communication techniques.
• Demonstrate wireless signal transmission using decimeter waves.

System Components

UHF Wave Generator :

• Quantity: 1

Function Generator :

• Quantity: 1

Saddle Base :

• Quantity: 3

AC/DC Amplifier :

• Output Power: 30 W
• Quantity: 1

Broadband Speaker :

• Quantity: 1

Screened Cable :

• BNC to 4 mm
• Quantity: 1

Connecting Leads :

• Current Rating: 32 A
• Length: 100 cm
• Color: Black
• Quantity: 4

Amplitude Modulation Demonstration :

• Illustrates the generation and transmission of AM signals.

Audio Signal Generation :

• Function generator provides adjustable audio-frequency input signals.

UHF Carrier Transmission :

• UHF wave generator produces the carrier signal for modulation.

Audio Output :

• Broadband speaker enables reproduction of the transmitted audio signal.

Educational Design :

• Ideal for studying analog communication and wireless transmission systems.