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The noise immunity of lumped parameter communication lines transmitting pulse width and pulse frequency width signals with various modulation laws is analyzed. Basic analytical expressions and dynamic state spaces of communication lines operating in the presence of induced harmonic interference with a wide frequency range are given. It is shown that the lines with pulse frequency width data carriers exhibit the highest noise immunity. Block diagrams and waveform diagrams of pulse frequency width scan ning converters that are to serve as the basis of sensors of adjustable parameters and communication lines ensuring the highest noise immunity of the process of analog message transmission are given.

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