The need to properly represent the ever changing complexities of the RF environment across communications, surveillance, electronic support measures and signal intelligence system with the advances of signal complexity and bandwidth, requires an enormous test and measurement effort. RF signal environment generation using Test & Measurement equipment brings field tests into the laboratory. This application note introduces the R&S Pulse Sequencer software, explains several examples that are applicable for research, development, before operational and during life-time test in detail, and guides you through the necessary steps, to generate a self-defined, arbitrary real life RF signal environment.