Technician 2022-2026T2A03
What is a common repeater frequency offset in the 70 cm band?
A
Answer
Operating procedures and emergency communications
Type
A
Plus or minus 5 MHz
B
Plus or minus 600 kHz
C
Plus or minus 500 kHz
D
Plus or minus 1 MHz
Answer Notes
Repeaters work by transmitting and receiving on two different frequencies simultaneously. The distance between the transmit and receive frequencies is known as the repeater offset. For the 70 cm (UHF) band, the standard frequency offset is plus or minus 5 MHz.
Knowing standard offsets is crucial for correctly programming your radio. If your offset is set incorrectly, you will be transmitting on a frequency the repeater is not listening to.
A common distractor is plus or minus 600 kHz, but that is the standard offset for the 2-meter (VHF) band, not the 70 cm band. The 70 cm band is much wider physically, which allows for the much larger 5 MHz separation between input and output frequencies.
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What is the national calling frequency for FM simplex operations in the 2 meter band?
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What is an appropriate way to call another station on a repeater if you know the other station's call sign?