FIELD: physics.
SUBSTANCE: apparatus has an unmodulated voltage generator and an amplitude-modulated voltage generator whose outputs are connected to inputs of an analogue signal multiplier. The apparatus also includes a high-frequency spectrum analyser connected to the output of the analogue signal multiplier, as well as an unmodulated voltage generator whose output is connected to the input of the analogue multiplier.
EFFECT: wider field of use.
2 dwg
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