Tektronix PG506A

The PG506A Calibration Generator provides three modes of square wave output, selectahoe dc outputs, and a variable amplitude output with front panel digital indication of oscilloscope deflection error. Simultaneous, plus and minus low-level, fast-rise (1.0 ns) square waves or high-amplitude (60 V) extremely clean square waves are available at frequencies from 10Hz through 1MHz for checking oscilloscope transient response. Frequency Response: 10Hz to 1MHz