A diode curve tracer with four independently variable axis scales
F.C. Evans, I Macalindin · Journal of Physics E Scientific Instruments · 1973
The instrument described gives a visual display of the voltage- current characteristic of any two-terminal device. The forward and reverse applied voltage excursions are independently variable from 0 to 15 V. The forward and reverse current scales are independently variable from 0-250 mA full scale. The circuitry is arranged so that the whole area of the display screen can be used for any combination of the four variables displayed.