Signal-Switching

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Switching of LF measurement signals or RF signals...

...is required when a measuring system has to manage a large number of signals. Especially in larger test systems, for example, a large number of sensor and measurement signals are generated. Of course, for reasons of price, it is not possible to use a separate A/D converter or measuring device for each signal. The signals must therefore be connected to the few available measurement inputs. A classic example is the multiplexer (MUX). In multiplexing, several channels are alternately switched to one channel. So one is selected from the number of available input signals and switched through to the measuring system. In principle, a multiplexer therefore works like an electronically controlled rotary switch. Further areas of application are the controlled switching of smaller or larger LF signals or RF signals via relays, and signal routing via a switching matrix. The Keysight DAQ970A or 34980A are classic examples of such switching systems. The basic units are mainframe and measuring device at the same time. In this case, the measuring device is a high-quality digital multimeter. Since switching solutions are often very individual and different, up to 3 (DAQ970A) or 8 (34980A) modules with different functions can be plugged into the mainframe as required. For example, they offer different switching solutions such as 2- or 4-wire multiplexers, switching matrices, etc.