Which of the following statements are correct with reference to superheterodyne receivers?(i) The main advantage of the superheterodyne receiver is its better tracking(ii) The main advantage of the superheterodyne receiver is an improvement in sensitivity(iii) The image channel rejection in superheterodyne receiver comes from IF stages only(iv) The image channel rejection in the superheterodyne receiver comes from the RF stage onlyChoose the correct answer from the code given below:

Heterodyne Receivers:Heterodyne Receivers are the most widely used receiver architecture in communication systems.The advantage of using heterodyne receivers is that all the incoming signal frequencies are converted into a fixed frequency called the intermediate frequency.THEREFORE, all the succeeding stages have to operate on a fixed frequency making the circuit simple and with improved performance.Note: The main advantage of the superheterodyne receiver is an improvement in sensitivity.The Block DIAGRAM of a Superheterodyne Receiver is represented as:RF amplifier is tuned to select and amplify a particular carrier frequency within the AM broadcast range.Only the selected frequency and its two sidebands are allowed to pass through the amplifier.The correct sequence of components is, therefore:RF Amplifier, followed by Mixer, followed by Demodulator, followed by AF Amplifier.Detailed Block Diagram:A superheterodyne receiver changes the RF frequency to a lower IF frequency. This IF frequency will be AMPLIFIED and demodulated to get a VIDEO signal.The image channel REJECTION in superheterodyne receiver comes from IF stages onlyGenerally, Mixer will do the down Conversion in Superheterodyne Receiver i.e. IF = fL – fs