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Cascaded IP3 Calculator — GPIO Labs RF system design tool — GPIO Labs Cascaded IP3 calculator Build a receive chain out of amplifiers and passive stages (cable, attenuators, filters) and see the cascaded input and output IP3 — plus which single stage is limiting your dynamic range. How to use it: each card below is one stage, ordered from antenna (top) to receiver (bottom). Amplifier stages need gain and input IIP3; passive stages just need loss. Use the dashed insert links to add a stage anywhere in the chain, and the arrows to reorder. Signal chain — antenna on the...

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Noise figure and gain specs assume your LNA is running linear. A strong nearby signal — an FM tower, a radar bench, a jammer — can push it into compression even if your wanted signal is weak. This calculator sums everything hitting the input, checks it against P1dB, and tells you whether you're clipping — and which signal to filter out if you are.

Your bias tee outputs a clean voltage. The LNA at the end of a long cable run doesn't see it — cable resistance eats into it along the way. This calculator shows exactly how much voltage survives the trip, and how far you can run before your LNA starts to brown out.

A coax cable loss calculator that goes past the dB number — see exactly what your cable run costs your receiver's noise figure, and whether moving your LNA to the antenna end would get it back.