40694 FM Modulation and Demodulation is a comprehensive lab training solution for students who have just started their first course on electronic communication. This board implements Frequency Modulation using Voltage Controlled Oscillator. The frequency demodulation consists of simple Phase Locked Loop circuit. 40694 has its own Audio Signal Generator and DC Source/ Level shifter on-board.

40694 FM Modulation and Demodulation comprises of following blocks :

• AC Source with variable amplitude and frequency
• DC Source/Level Shifter
• Frequency Modulation using VCO
• Frequency Demodulation using PLL
• Low pass filter

Feature

1. On-board Audio Signal Generator
2. Amplitude and Frequency controls for Audio signal generator
3. Variable DC Source/ Level Shifter
4. Frequency Modulation using VCO
5. Frequency Demodulation using PLL

Object

1. Study of Frequency Modulation using Voltage Controlled Oscillator.
2. Study of Frequency Demodulation using Phase Locked Loop.
3. Measurement of modulation index.

Technical Specifications

Audio Signal Source

Type                                                 : Sinusoidal

Frequency range                              : 0- 3.4 KHz

Amplitude                                         : 0 – 5 V variable

DC Source/Level Shifter                  : 0 – 5 V variable

Frequency Modulation                     : Using VCO

Frequency Demodulation                 : Using PLL

Interconnections                               : 2mm socket

Power Supply                                   : 110 -220 V, ± 10%, 50 / 60 Hz

Test Points                                        : 10 nos.

Dimensions (mm)                             : 250X150 mm

Weight                                              : 400 gm (approximately)

Operating Conditions                       : 0-40 C, 85% RH

Included Accessories                       : 2mm Patch Cord (Red) - 5 nos. 2mm Patch Cord (Black )- 2 nos.