equipments for analog and digital communication practical. equipments for analog and digital communication practical. , sample and hold circuit sine wave input signal generation 4khz, 8khz and 16khz sampling frequency generation sample and hold circuit using analog switch built in power supplies and wooden closed cabinet , analog transmitter and receiver trainer kit(signal sampling and reconstruction trainer kit) audio oscillator to generate signal, sampling at 32 khz to 2 khz in 5 ranges, in each sampling frequency range at 10% to 80% duty cycle reconstruction of signal using 2 different low pass filters, one with single stage filter and another with 2 stage filter built in power supplies and wooden closed cabinet , psk modulation / demodulation trainer kit carrier frequency generator modulating signal generator bpskmodulator bpsk demodulator built in power supplies and wooden closed cabinet , ask transmitter / receiver trainer kit modulating 1 khz square wave signal generator sine wave 100 khz carrier frequency generator ask modulator using xr 2206 demodulator using low pass filter built in power supplies and wooden closed cabinet => limited