Intermediate frequency too low: In a radio receiver, what will happen if the chosen intermediate frequency (IF) is too low?

Introduction / Context:
The choice of IF in a superheterodyne receiver involves trade-offs. Too low an IF introduces both advantages and disadvantages that affect performance.

Given Data / Assumptions:

• Superheterodyne receiver design.
• Intermediate frequency selection influences image rejection, selectivity, and oscillator design.

Concept / Approach:

Low IF narrows the separation between the signal and its image, which improves image rejection. However, it also sharpens selectivity excessively and forces the oscillator tuning range to adjust accordingly.

Step-by-Step Solution:

Verification / Alternative check:

Standard receiver design handbooks confirm all these effects occur with low IF.

Why Other Options Are Wrong:

• Each individual effect is valid, but complete answer is all of the above.

Common Pitfalls:

• Assuming only one effect dominates; in fact, multiple occur simultaneously.

Final Answer:

All of the above.