Hence, the output will be the carrier signal at high input. The high signal closes the switch, allowing a carrier wave. The binary sequence from the message signal makes the unipolar input to be either High or Low. The carrier generator, sends a continuous high-frequency carrier. Following is the block diagram of the ASK Modulator. The ASK modulator block diagram comprises of the carrier signal generator, the binary sequence from the message signal and the band-limited filter. To find the process of obtaining this ASK modulated wave, let us learn about the working of the ASK modulator. The following figure represents ASK modulated waveform along with its input. The binary signal when ASK modulated, gives a zero value for Low input while it gives the carrier output for High input. Amplitude Shift Keying (ASK) is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal.Īny modulated signal has a high frequency carrier.
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