RF signal chain · an instrument you can wire

Signal Chain Studio — Interactive RF Filters & Signal Chain Simulator

Interactive RF signal-chain lab for filter behavior, cascaded stages and end-to-end frequency response. Wire a source through amplifiers, passive R/L/C networks and bandwidth limits, then probe every node with a scope, a spectrum analyser and the chain's own transfer function.

square wave in · odd harmonics, 1/k after the R/L/C low-pass · 2nd order, ζ = 0.45 harmonic magnitude |X|, |Y| = |X|·|H|
A square wave is nothing but odd harmonics. Push it through a low-pass and the high ones die first: the edges round off, and when the filter is a resonant R/L/C the step rings. The corner fc sweeps so you can watch the output change.

Oscilloscope

0.000 V
wheel = time zoom · shift+wheel = volts · drag = pan

Analysis

wheel = span · drag = pan
solid = total · faint = per stage
the filtered output is the harmonics, each scaled by |H|
15
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