An apparatus for electronic warfare signal simulation which is used in an external test system to simultaneously test a plurality of “victim” communication systems for vulnerability to jamming. The test system includes a remote radiator of a signal free of jamming effects, and a remote radiator of one or more radio frequency control signals which represent one or more predetermined jamming threats in the low and mid bands. The simulation apparatus has a pair of couplers, each adapted to be coupled between a respective one of a plurality of “victim” antennas and its associated “victim” receiver, for coupling off the control signals to a receiving circuit, a plurality of modules for generating simulated jamming signals, and a band select circuit for translating the frequency of each simulated jamming signal, setting its level to that determined for its control signal, and replicating the “victim” antenna gains, and feeding the modified simulated jamming signals together with the desired signal to the plurality of “victim” receivers.
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