Tektronix 2212 - Page 243

Glossary
Trigger Light
A light on the 2212 front panel, labelled TRIG'D, that indi-
cates when the instrument has acquired a trigger.
Trigger Mode
The way in which the instrument acquires a trigger.
Trigger Slope
The parameter that determines whether the oscilloscope
triggers as the voltage of the displayed signal is rising or fall-
ing.
Trigger Source
The signal that provides the trigger event. The trigger source
can be a signal acquired through either channel or an exter-
nal trigger.
Trigger Position
The location of the trigger event relative to the waveform on
the display.
Uncalibrated Channel
A channel manipulated with the variable volts-per-division
(VAR switch) control. This control allows you to scale a
waveform vertically so that it takes up an arbitrary number of
vertical divisions. However, after this manipulation, the
exact number of volts-per-division for that signal is un-
known.
Vertical Axis
The axis along which an oscilloscope measures the voltage of
a signal, in volts per division or factions of a volt per divi-
sion.
Volt (V)
The unit of potential difference. One volt is the amount of
voltage needed to cause one ampere of current to pass
through one Ohm of resistance.
Volts per Division
The number of volts, or fractions of a volt, represented by
each major division on the vertical axis, except in XY mode,
where both axes represent volts per division.
2212 User Manual
E-9