When using an RF Power Meter with an RF Power Sensor to make an RF Power Measurement the user must know that the measurement is accurate and there is traceability to a known standard. All diode, thermo-electric, and thermistor power sensors have calibration factors associated to particular frequencies that are used to insure an accurate power measurement. Technicians and engineers use these calibration factors when making measurements; but where do these calibration factors really come from?
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