Constants & Formulas

A Few Constants of Interest

Note: Values in bold are exact.

Ohm's Law

Power Conversions

dB Correction Factor

To correct the dB reading when the measured impedance is different from the meter's basis of calibration:

1.) dB_CF = 10log(Calibration Ω / load Ω)

2.) dB_Actual = dB_Meter + dBCF

Where:

dB_CF = Correction factor

Ω = Impedance in ohms

Frequency and Wavelength Conversions

Free Space Attenuation

Line-Of-Sight