STIGMA/ALIGNMENT X Knob
Changes the electron beam alignment. Both the beam and the aperture can be aligned with this knob, depending on the alignment mode. This knob is used primarily for correcting the astigmatism of the beam.
STIGMA/ALIGNMENT Y Knob
Changes the electron beam alignment. Both the beam and the aperture can be aligned with this knob, depending on the alignment mode. This knob is used primarily for correcting the astigmatism of the beam.
BRIGHTNESS Knob
Adjusts the brightness of the compositional and topographic image by varying the video signal dc level.
CONTRAST Knob
Adjusts the contrast of the compositional and topographic image by varying the video amplifier gain.