The 34904A is a multi-channel switch/measure unit providing up to four independent switch modules, each having 6 electromechanical relays and 6 solid-state switches. It also contains 24 high-impedance digital multimeters used for basic measurements such as resistance, current and voltage. All these features make the 34904A an ideal tool for applications such as system testing and monitoring, signal routing, signal switching, electrical isolation, automated test systems, and embedded control.