The 067-0523-00 Calibration Fixture is used with Tektronix 580-Series oscilloscopes. The calibration fixture provides a reference signal for setting the oscilloscope vertical amplifier gain, a fast-rise voltage step for adjusting oscilloscope vertical amplifier transient response, and a load bank which loads the oscilloscope power supplies over their full current range. The 067-0523-00 allows a check of the DC balance of the oscilloscope vertical amplifier. It may also be fed external signals which might be used in calibration procedures. 580-Series oscilloscope vertical amplifiers that have been calibrated with the 067-0523-00 have a uniform transient response. The amplitude calibration signal has a long-term amplitude stability. The amplitude signal circuit is driven by the dual-trace alternate sync pulse generated by the oscilloscope. The dual-trace display shows the presence of the sync pulse.