An electronic warfare 'EW' system comprising: electronic attack 'EA' circuitry comprising detection circuitry arranged to detect, capture and store threat pulses from a radar, pulse generation circuitry (314, 400) arranged to, in response to identification of the threat pulses, generate a response comprising a superposition of the threat pulses captured and stored in memory by at least modulating the threat pulses in amplitude, frequency, phase, length and timing, wherein modulations of each threat pulse and timing of the superposition relative to the threat pulses are based on stored parameters, the superposition comprising response pulses associated with at least one of: threat pulses comprising different characteristics; and threat pulses originating from different radar; and transceiver circuitry (112a, 112b) configured to receive the threat pulses and transmit response pulses of the response; wherein the pulse generation circuitry (314, 400) comprises a pulse memory arranged to provide the threat pulses and a plurality of modules comprising: pulse stretch circuitry arranged to adjust pulse widths of the response pulses away from pulse widths of the threat pulses; range modulation circuitry arranged to adjust delays of the response pulses away from delays of the threat pulses; velocity modulation circuitry arranged to adjust frequencies of the response pulses away from frequencies of the threat pulses; and amplitude modulation circuitry arranged to adjust amplitudes of the response pulses away from amplitudes of the threat pulses; wherein the range modulation circuitry is selectable in Range Gate Stealer/Range Gate Pull Out 'RGS/RGPO' mode in which the response pulses are walked from zero to maximum delay with one of constant velocity and acceleration and constantly repeated, RGS/RGPO with Keeper mode that duplicates the RGS/RGPO mode and adds a keeper pulse at a stop range position of each response pulse, pseudorandom mode in which the response pulses are randomly placed between a specified range or Range Bin Masking in which the response pulses are randomly placed between specified range values at ranges that are integral multiples of a range bin size. electronic attack 'EA' circuitry comprising detection circuitry arranged to detect, capture and store threat pulses from a radar, pulse generation circuitry (314, 400) arranged to, in response to identification of the threat pulses, generate a response comprising a superposition of the threat pulses captured and stored in memory by at least modulating the threat pulses in amplitude, frequency, phase, length and timing, wherein modulations of each threat pulse and timing of the superposition relative to the threat pulses are based on stored parameters, the superposition comprising response pulses associated with at least one of: threat pulses comprising different characteristics; and threat pulses originating from different radar; and transceiver circuitry (112a, 112b) configured to receive the threat pulses and transmit response pulses of the response; wherein the pulse generation circuitry (314, 400) comprises a pulse memory arranged to provide the threat pulses and a plurality of modules comprising: pulse stretch circuitry arranged to adjust pulse widths of the response pulses away from pulse widths of the threat pulses; range modulation circuitry arranged to adjust delays of the response pulses away from delays of the threat pulses; velocity modulation circuitry arranged to adjust frequencies of the response pulses away from frequencies of the threat pulses; and amplitude modulation circuitry arranged to adjust amplitudes of the response pulses away from amplitudes of the threat pulses; wherein the range modulation circuitry is selectable in Range Gate Stealer/Range Gate Pull Out 'RGS/RGPO' mode in which the response pulses are walked from zero to maximum delay with one of constant velocity and acceleration and constantly repeated, RGS/RGPO with Keeper mode that duplicates the RGS/RGPO mode and adds a keeper pulse at a stop range position of each response pulse, pseudorandom mode in which the response pulses are randomly placed between a specified range or Range Bin Masking in which the response pulses are randomly placed between specified range values at ranges that are integral multiples of a range bin size. pulse stretch circuitry arranged to adjust pulse widths of the response pulses away from pulse widths of the threat pulses; range modulation circuitry arranged to adjust delays of the response pulses away from delays of the threat pulses; velocity modulation circuitry arranged to adjust frequencies of the response pulses away from frequencies of the threat pulses; and amplitude modulation circuitry arranged to adjust amplitudes of the response pulses away from amplitudes of the threat pulses; wherein the range modulation circuitry is selectable in Range Gate Stealer/Range Gate Pull Out 'RGS/RGPO' mode in which the response pulses are walked from zero to maximum delay with one of constant velocity and acceleration and constantly repeated, RGS/RGPO with Keeper mode that duplicates the RGS/RGPO mode and adds a keeper pulse at a stop range position of each response pulse, pseudorandom mode in which the response pulses are randomly placed between a specified range or Range Bin Masking in which the response pulses are randomly placed between specified range values at ranges that are integral multiples of a range bin size.