ADC

What is Amplitude Modulation?

• Change in amplitude of carrier according to modulating signal amplitude

• Change in frequency of carrier according to modulating signal amplitude

• Change in amplitude of carrier according to modulating signal frequency

• Change in amplitude of modulating signal according to carrier signal amplitude

When aliasing takes place?

• Sampling signals less than Nyquist Rate

• Sampling signals more than Nyquist Rate

• Sampling signals equal to Nyquist Rate

• Sampling signals at a rate which is twice of Nyquist Rate

Normal human voice frequency range

• 20kHZ-200M HZ

• 20HZ-20KHZ

• 10KHZ-100KHZ

• 30MHZ-300MHZ

It is suitable to connect woofer from the input through

• band pass filter

• band stop filter

• low pass filter

• high pass filter

A modem is classified as low if speed of data rate is

• upto 600bps

• upto 200bps

• upto 400bps

• upto 500bps