An optical switch is a precision instrument that directs optical signals from one fiber path to another without converting light into an electrical signal. It acts as a routing mechanism for fiber optic networks or test systems, enabling flexible control over optical signal paths. The simplest device is an on/off switch with one input and one output, which allows. Use 25+ X-Series applications to analyze, demodulate, and troubleshoot signals across wireless, aerospace/defense, EMI, and phase noise. With extra memory and storage, these enhanced NPBs run Keysight's AI security and performance monitoring software and AI stack.