The set-up consists of modulating and demodulating circuits. It is provided with a fixed frequency (70KHz) oscillator, which may be used for carrier frequency. This eliminate the need of a R.F. Oscillator. The carrier signal may be given from any other oscillator also, if the change in carrier frequency is desired. Since the circuit is designed for comparatively low frequency (70KHz to 150KHz) carrier signal, the usual Oscilloscope is good enough.

The following studies can be carried out with this set-up

• Carrier signal testing
• Variation of modulated wave with the modulation signal
• Study of detector circuit

The experimental set-up is provided with a built-in power supply.

• Measuring/Testing instruments required
• A.F. Oscillator
• CRO

The above experimental set-up has been laid down on a decorated bakelite board with an aim of providing an easy understanding to the students. All components are well spread out for clarity and easy repairs and replacement. The set-up is provided with a booklet, which contains its detailed theory of operation, description, specifications, suggestions and discussion on the various experiments that may be performed with it.