Question
What is a common repeater frequency offset in the 2 meter band?
Answer Options
- A) Plus or minus 5 MHz
- B) Plus or minus 600 kHz
- C) Plus or minus 500 kHz
- D) Plus or minus 1 MHz
Correct Answer: B
Explanation
A repeater’s frequency offset is the necessary difference between its receiving frequency (input) and its transmitting frequency (output). This separation allows the repeater’s receiver and transmitter to operate simultaneously without interfering with each other (a phenomenon called desensitization).
In the 2-meter band (144 MHz to 148 MHz), the widely accepted standard frequency offset is \pm 600 kHz (kilohertz). This means if the repeater transmits on 147.000 MHz, your radio must transmit on 147.600 MHz (plus offset) or 146.400 MHz (minus offset). This standardization is crucial for easily programming mobile and handheld radios.
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