AM/AM (Component Test)

Menu Path: Trace > Data > Component Test > Linearity > Channel N > AM-AM

The AM/AM trace shows the channel's output amplitude versus its input amplitude: the response magnitude (Vpk, from IQ Meas) plotted against the stimulus magnitude (Vpk, from IQ Ref). For a perfectly linear channel the result is a straight line; gain compression appears as a droop at high stimulus amplitudes.

The trace includes a least-squares polynomial fit whose order is set by the Polynomial Order control (default 5). The fit coefficients per channel are reported in the Linearity Summary table.

This trace is only computed when Computation Mode = Statistical.

See Also

AM/PM

Linearity Summary

Available Trace Data