Frequency Modulation and Demodulation

Frequency Modulation & Demodulation

Objective:

• Observe Change in the Carrier Frequency According to the Amplitude of the Modulating Signal.
• Calculate Modulation Index of the Modulated Signal.
• Recovery of Modulating Signal From Demodulator Circuit.

• In Built IC based DC Regulated Power Supply +12V/ 250mA.
• On Board Sine Wave Audio Frequency Signal Generator
• Frequency: 2 KHz & 4KHz Amplitude: 0-2.8 Vpp
• Modulation using VCO 8038 (Carrier generator internally 62KHz, 5.5Vpp)
• Demodulation Circuit Using Phase Locked Loop IC LM 565.
• Circuit Diagram Printed on Glass Epoxy PCB & all Important IC's & Test Points Brought out on Front Panel.
• Power Requirement: 230 VAC +10%, 50Hz.