The BLI 6127B is an accurate and simple way to calibrate a wide variety of scopes from low frequency units to instruments bandwidths over 1 GHz. The 6127B provides a variety of signals of precise voltage, current, timing and waveshape. The 6127B can be operated manually or automatically using the IEEE-488 interface and Ballantines automated software SCOPE-CAL?. Time saving controlls include computation of percent deviation, repeat step increment, self checking and warning of invalid entries.