Ham Radio General Class Test 2025 – 400 Free Practice Questions to Pass the Exam

A field-strength meter is specifically designed to measure the strength of radio frequency (RF) signals in the vicinity of an antenna. When making adjustments to an antenna or transmitter, monitoring the relative RF output is crucial to ensure optimal performance. The field-strength meter provides a direct indication of how well an antenna is radiating energy, which can help the operator fine-tune the antenna system for better efficiency and signal quality.

The other options, while useful in different contexts, do not serve the same purpose. An antenna noise bridge is typically used to find the resonant point of an antenna and to assess matching, but it does not directly measure RF output levels. A multimeter is a versatile tool for measuring voltage, current, and resistance but is not suited for assessing RF output without specific high-frequency capabilities. A Q meter is used to measure the quality factor (Q) of a circuit but does not directly measure the field strength of RF signals.