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.

IP3 (dBm)

Third-order intercept point of the mixer.

Estimate the 1 dB compression point of a mixer from its IP3 using the documented mixer-specific rule that P1dB sits 10.5 dB below the third-order intercept. 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]

P1dB (dBm)

Estimated input 1 dB compression point.

• RF gain, noise, compression, intercept, mismatch, sensitivity, and link calculations require consistent impedance, bandwidth, frequency, reference plane, temperature, modulation, and cascade ordering. Datasheet values at different conditions cannot be combined without correction.
• 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.

• P1dB Estimate

  Estimate the 1 dB compression point from IP3 using the documented rule P1dB(dBm) = IP3(dBm) - 9.6.

• Mixer IP3

  Extrapolate the third-order intercept point of a mixer from one tone level and its measured third-order intermodulation product.

• IP3 From Two Tones

  Compute the output third-order intercept point as IP3(dBm) = P(dBm) + (P(dBm) - IM3(dBm)) / 2 from a single tone level and its IM3 product.