Question
What is the purpose of the receiver IF Shift control?
Answer Options
- A) To permit listening on a different frequency from the transmitting frequency
- B) To change frequency rapidly
- C) To reduce interference from stations transmitting on adjacent frequencies
- D) To tune in stations slightly off frequency without changing the transmit frequency
Correct Answer: C
Explanation
The IF Shift control is a feature in modern communications receivers that provides a convenient and effective way to manage interference from signals close to the desired frequency. It works by slightly adjusting the center frequency of the receiver’s Intermediate Frequency (IF) passband.
The purpose of the receiver IF Shift control is to reduce interference from stations transmitting on adjacent frequencies. By shifting the IF passband slightly up or down, the operator can move the unwanted interfering signal off the center slope of the IF filter, attenuating it significantly while keeping the desired signal close to the filter’s peak response for clear reception.
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