Abstract: The multichannel oscilloscope has a dot matrix display device, advantageously an LCD, with an integrated controller and character generator for forming a display made up of a plurality of characters consisting of pixels on a display screen, a multiplexer device connected to receive data from a plurality of channels and send the data to the dot matrix display device for multichannel display purposes and an additional controller device for controlling the transmission of the data from the multiplexer to the dot matrix display device and for controlling the parameters of the display device. The additional controller device consists of two EPROM units only and a more expensive but versatile microprocessor chip is not necessary. The additional controller device alternately transmits instruction signals defining a position on the display screen and input data signals from the multiplexer device determining a character to be displayed at that position.