jam

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2 : to put into action hard or suddenly <He jammed his hands into his pockets.
Jamming by response is made by radar signal reception, its amplification on target and reemission in such a pattern and in such a time that target reflexes, that do not exist in the space under surveillance, appear on the jammed radar, or the coordinates with the existing target have been shifted so to remain within the reliability required.
This would provide a 0-dB I/S in each jammed channel.