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Which of the following advantages of superheterodyne radio over other forms of radio is INCORRECT?

Which of the following advantages of superheterodyne radio over other forms of radio is INCORRECT? Correct Answer Ground to air communications

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.
  • Generally, Mixer will do the down Conversion in superheterodyne Receiver i.e.

           IF = fL – fs.

  • Superheterodyne radio used to be the undoubted radio receiver technique of choice. It was almost universally used. However, nowadays with software-defined radios taking over the superheterodyne is used less widely. Superheterodyne was used in every form of radio from domestic broadcast radios to walkie-talkies, television sets, through to hi-fi tuners and professional communications radios, satellite base stations, and much more.

  • Its flexibility and capabilities have meant that it was adopted for very many uses from broadcast reception, uses as a test receiver for EMI / EMC testing, two-way radio communications, reception for scientific applications, satellite signal reception, and many others.

  • Air-Ground Radio is simply a means of channelling information, within the station's area of operation, about an aircraft's position and intentions, through a single reporting point so superheterodyne radios are not used in this as besides the wanted signal, it receives also a signal at the so-called image frequency. The IF needs to be selected in such a way that the image frequency can be easily rejected by a simple RF tunable circuit. Hence option (4) is the correct answer.

Related Questions

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 only Choose the correct answer from the code given below:
Simplify : $${{{5 \over 3} \times {7 \over {51}}{\text{ of }}{{17} \over 5} - {1 \over 3}} \over {{2 \over 9} \times {5 \over 7}{\text{ of }}{{28} \over 5} - {2 \over 3}}}$$
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Assumptions :
I. The sale of all the radio sets manufactured in India is known.
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$$H\left( z \right) = {{2 - {3 \over 4}{z^{ - 1}}} \over {1 - {3 \over 4}{z^{ - 1}} + {1 \over 8}{z^{ - 2}}}}$$
Consider the following statements:
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$$ROC:\left| z \right| > {1 \over 2}$$
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$$ROC:\left| z \right| S3 : The system is neither stable nor causal for
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3. saving on middle men's margins.
4. ensuring larger control over the market.
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Select the correct answer from the options given below: