Scientech2208 Laboratory for Armstrong Frequency Modulator & Demodulator

It consists of an FM modulator which uses Armstrong method of Frequency modulation with the help of a DSB-SC Balanced Modulator, Carrier wave phase shifter and a Operational Amplifier based adder. Also a Demodulator section which demodulate the FM wave with PLL detector and a filter followed by an amplifier. Three different experiments show how FM wave generated using AM wave and then demodulated to extract the original modulating wave.

Product Features:

• A self contained platform

• Functional blocks indicated on board mimic

• Input - Output and Test points provided onboard

• Built in DC Power Supply

• On board audio oscillator, carrier oscillator, modulator, phase shifter, amplitude adjusts & filter circuits

• Compact size

• Balanced modulator which allows audio input signal to be amplitude modulated (DSB-SC) by carrier input prior to frequency modulation, with balance adjustment

• Online Product Tutorial

• Observe the Double Sideband Suppressed carrier AM generation
• Armstrong Frequency Modulator
• Operation of Phase-Locked Loop detector as a FM demodulator