Signals and Systems NI ELVIS Communications Device—The Emona Signals and Systems Board for NI ELVIS is an add-on application board for the NI Engineering Laboratory Virtual Instrumentation Suite II (NI ELVIS II) or NI ELVIS II+. This device was defined specifically for teaching signals and systems in electrical and computer engineering curricula. It is ideal for university signal and systems and introduction to signal processing courses. With the Emona Signals and Systems Board for NI ELVIS, you can teach concepts such as characterizing linear and nonlinear signals, understanding convolution, using poles and zeros in the Laplace domain. Additionally, you can teach sampling and aliasing with a hands-on experimental approach.