A system (300, 600, 700, 800) for triggering transmit and receive pulses in a radar system, the system comprising: an equivalent time sampling unit providing, transmitting and receiving trigger pairs, each trigger pair including a transmit trigger pulse and a corresponding receive trigger pulse, there being a varying delay between each transmit trigger pulse and the corresponding receive trigger pulse; and a control unit comprising a pseudorandom number generator configured to generate a sequence of number values that produces a substantially even distribution of number values throughout a range, the control unit being configured to control said equivalent time sampling unit to provide a sequence of pseudorandom delay periods, characterized in that, each pseudorandom delay period of said sequence of pseudorandom delay periods being between one of said trigger pairs and a next of said trigger pairs, each pseudorandom delay period of said sequence of pseudorandom delay periods being based on a pseudorandom number value of the sequence of number values, the varying delay between each transmit trigger pulse and the corresponding receive trigger pulse being adjustable independent of the sequence of pseudorandom delay periods; wherein the system (300, 600, 700, 800) is configured to be included in a radar system having a receive circuitry bandwidth extending from fifty Megahertz to around ten Gigahertz such that each of the transmit trigger pulses causes a transmit pulse in the radar system and each of the corresponding receive trigger pulses causes a corresponding receive pulse in the radar system; and wherein a length of the sequence of number values is chosen such that coherent noise is only detectable below fifty Megahertz. an equivalent time sampling unit providing, transmitting and receiving trigger pairs, each trigger pair including a transmit trigger pulse and a corresponding receive trigger pulse, there being a varying delay between each transmit trigger pulse and the corresponding receive trigger pulse; and a control unit comprising a pseudorandom number generator configured to generate a sequence of number values that produces a substantially even distribution of number values throughout a range, the control unit being configured to control said equivalent time sampling unit to provide a sequence of pseudorandom delay periods, characterized in that, each pseudorandom delay period of said sequence of pseudorandom delay periods being between one of said trigger pairs and a next of said trigger pairs, each pseudorandom delay period of said sequence of pseudorandom delay periods being based on a pseudorandom number value of the sequence of number values, the varying delay between each transmit trigger pulse and the corresponding receive trigger pulse being adjustable independent of the sequence of pseudorandom delay periods; wherein the system (300, 600, 700, 800) is configured to be included in a radar system having a receive circuitry bandwidth extending from fifty Megahertz to around ten Gigahertz such that each of the transmit trigger pulses causes a transmit pulse in the radar system and each of the corresponding receive trigger pulses causes a corresponding receive pulse in the radar system; and wherein a length of the sequence of number values is chosen such that coherent noise is only detectable below fifty Megahertz.