Explanation: A logic analyser is an electronic instrument that captures and displays multiple signals from a digital system or digital circuit. The normal oscilloscope deals with time domain, spectrum analyser with frequency domain and logic analyser with digital domain. Logic analyser is basically a multichannel oscilloscope. The probes connect the logic analyser to the system under test. The logic analyser memory consists of a RAM. The clock signal i.e. internal or external clock input is connected to the memory on receiving clock signal the logic analyser samples the data present on input signals These samples are stored in the memory for each input channel. The analyser can store from 256 to 1024 samples. When the memory receives a trigger signal then the samples are stored in it and displayed on the CRT display. We can set a binary word using switches or through keyboard in the word recognizer circuit. The word recognizer circuit compares this word with the binary input word. When 2 words match it sends a trigger signal to the memory. When the memory receives a trigger signal, it sends the samples to a CRT display.