Plain-language answer: Calibration establishes a measurement system’s relationship to known standards and moves systematic fixture effects to a defined reference plane.
Why it matters at the radio
At RF, a short adapter or cable can transform impedance. Correct calibration makes the result describe the device under test instead of the test lead.
What to watch in the field
Use sound standards, calibrate across the intended frequency span, avoid moving flexible cables afterward, and verify with a known load.
The common misunderstanding
Treating a device’s factory calibration as a substitute for reference-plane calibration of the current test setup.
Learning boundary
This lesson explains established radio and antenna practice. Current regulations, electrical and building codes, site conditions, and the exact equipment or antenna guide control legal limits, ratings, compatibility, and safety.
