7854
The Tektronix 7854 is a 400 MHz bandwidth digital sampling analog storage oscilloscope that takes two horizontal plug-ins and two vertical plug-ins. It has a built-in digitizer and waveform computer. It can be controlled using GPIB or using a special external keyboard. The waveform computer can perform operations such as waveform adding and multiplying, or for example, waveform averaging to remove noise.