84
The Tektronix Type 84 is a calibration fixture plug-in for 580-series scopes. It was renamed the 067-0523-00 during production. The Type 84 provides a calibrated amplitude signal for adjusting gain, a fast-rise voltage step for adjusting the impulse response of the vertical amplifiers in the scope, and load resistors to test the power supply of the scope. The fast-rise pulses are produced by a mercury switch with part number 260-0282-02 and are specified to have a repetition rate of 550 to 750 pulses per second, with a rise time that is "considerably less than the response time of the vertical amplifier in a 580-series oscilloscope."
