Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Incident Milliwatts (mW)

Required number input.

Transmitted Milliwatts (mW)

Required number input.

Optical insertion loss of a connector from incident and transmitted powers measured with the same reference. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Loss Decibels (dB)

The resulting loss decibels returned as a number.

• Fiber loss and dispersion depend on wavelength, fiber type, launch conditions, connectors, splices, bends, temperature, bandwidth, and nonlinear effects. A link budget needs explicit transmitter, receiver, aging, and engineering margins.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Common Mode Filter Attenuation

  Estimate common-mode series-filter insertion loss into a resistive load from measured complex common-mode impedance at the selected frequency; source impedance is assumed zero.

• Differential Mode Filter Attenuation

  Estimate differential-mode series-filter insertion loss into a resistive load from measured complex differential-mode impedance at the selected frequency; source impedance is assumed zero.

• EMI Shielding Effectiveness dB

  Estimate electromagnetic shielding effectiveness from incident and transmitted electric-field amplitudes using 20 log10(Ein/Eout); both must use the same units.