Analogue control systems offer a number of advantages, including the ability to easily set the control parameters (e.g. the speed range, PID and proportional band) and the possibility of isochronous operation (proportional band of zero). In addition to their excellent control properties, a further benefit of analogue systems is that there is no need for software or a programming unit – merely a small screwdriver to set the potentiometers. Analogue control systems are ideal for applications requiring constant speed control (generator systems).