Question
Where should an RF power meter be installed?
Answer Options
- A) In the feed line, between the transmitter and antenna
- B) At the power supply output
- C) In parallel with the push-to-talk line and the antenna
- D) In the power supply cable, as close as possible to the radio
Correct Answer: A
Explanation
An RF power meter measures the radio frequency (RF) energy being transmitted. To measure the power being delivered to the antenna, and to check the Standing Wave Ratio (SWR - T9B12), the meter must be installed directly in the path of the RF signal.
Therefore, it should be installed in the feed line, between the transmitter and antenna. This position ensures the meter can accurately sample the forward (output) power and the reflected power (SWR) before the energy is radiated by the antenna. Measuring current at the power supply output (option 1) uses a DC ammeter and measures DC input power, not RF output power.
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