Difficulty: Medium
Correct Answer: 2110 kHz
Explanation:
Introduction / Context:
Image frequency is a key concept in superheterodyne receivers. It represents an undesired frequency that can also mix with the local oscillator to produce the same IF as the desired signal, leading to interference unless filtered.
Given Data / Assumptions:
Concept / Approach:
The image frequency f_i is given by: f_i = f_lo + IF = f_s + 2IF.
Step-by-Step Solution:
Verification / Alternative check:
Another formula: f_i = f_s + 2IF = 1200 + 910 = 2110 kHz, confirming the result.
Why Other Options Are Wrong:
Common Pitfalls:
Final Answer:
2110 kHz.
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