The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is _______________?
Correct answer: B. 1310 kHz
- A. 455 kHz
- B. 1310 kHz
- C. 1500 kHz
- D. 1520 kHz
Explanation
For the usual high-side injection, the local oscillator is set to signal frequency plus IF: 855 + 455 = 1310 kHz. The low-side value would be 400 kHz, which is not among the options.
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