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Which of the following is an important reason for using a VHF intermediate frequency in an HF receiver?
To move the image response far away from the filter passband
Using a high first IF (e.g., VHF range like 45-70 MHz) in an HF receiver places the image frequency (RF + 2*IF or RF - 2*IF) much farther away from the desired RF signal, making it easier for the fixed-tuned or broadly tuned front-end filters to provide sufficient image rejection.
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