Analog Communication Set 1

Have non linear current-voltage characteristics ✘ Are used for Amplitude Modulation ✘ Are used for frequency modulation ✘ Both a and b are correct ✔

Square law demodulator ✘ Envelope detector ✘ PLL detector ✘ Both a and b are correct ✔

Detection ✘ Modulation ✘ Demultiplexing ✘ Sampling ✔

Is used for DSB SC generation ✘ Consists of four diodes connected in the form of ring ✘ Is a product modulator ✘ All of the above ✔

0.01% ✘ 0.00% ✘ 0.01% ✘ 0.01% ✔

Carrier is locally generated ✘ Passed through a low pass filter ✘ The original signal is recovered ✘ All of the above ✔

Local generation of carrier ✘ The frequency of the locally generated carrier must be identical to that of transmitted carrier ✘ The phase of the locally generated carrier must be synchronized to that of transmitted carrier ✘ All of the above ✔

Needs additional system for generation of carrier ✘ Needs additional system for synchronization of carrier ✘ Receiver is complex and costly ✘ All of the above ✔

Have same bandwidth used for two DSB-SC signals ✘ Is also known as Bandwidth Conservation scheme ✘ Is used in color television ✘ All of the above ✔

Used with DSB-SC signal ✘ A small carrier transmitted with modulated signal ✘ Used for synchronization with local carrier at the receiver ✘ All of the above ✔