With the 5440-01 Storage Oscilloscope Mainframe, view time at normal intensity can be varied from a fraction of a second to more than 5 minutes. In the save mode, signals can be viewed at lower intensity for up to an hour. Make low frequency measurements easily and accurately, or capture high-speed events that occur only once or at very low rep rates! Offers CRT readout of deflection factors for convenient, error-free measurements. With the flexibility of this 3 plug-in mainframe and the wide choice of plug-ins (sold separately), the 5441 will make virtually any measurement from DC to 50MHz.