Which action is NOT typically part of field radio preventive maintenance?

• A. Calibrate the GPS receiver
• B. Inspect casing and connectors
• C. Test battery and power
• D. Check antenna and coax

Answer: (C)

Field radio preventive maintenance focuses on keeping the external condition and RF/Navigation readiness of the unit intact in the field. You visually inspect the casing for damage, corrosion, or moisture, and you verify that all connectors are clean and secure so the RF path remains solid. Checking the antenna and coax is essential to ensure there are no cracks, breaks, or wear that would degrade performance, especially under field conditions. Calibrating the GPS receiver is part of maintaining accurate navigation data, which is important for a system that relies on GPS timing or positioning in the field.

Testing the battery and power, while important for overall reliability, isn’t typically part of field preventive maintenance. That kind of battery capacity or power-system load testing requires specialized equipment and controlled procedures, often done at depot or with dedicated test setups. In the field, you rely on simpler indicators and a practical check of power availability rather than full battery/power testing.